CFT Series Synthesizer Users Guide...Power (J2) 0 dBm Phase Noise(10 GHz) 1kHz ‐70 dBc/Hz 10kHz...
Transcript of CFT Series Synthesizer Users Guide...Power (J2) 0 dBm Phase Noise(10 GHz) 1kHz ‐70 dBc/Hz 10kHz...
CFT Series Synthesizer Draft Rev‐B
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CFT Series Synthesizer Users Guide
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CONTENTS: Warranty
CFT Series Synthesizer Overview
Features Specification Mounting Connectors Power Requirements
P2 Signal Table
Hardware Functionality Introduction RF Firmware
Status and Control Interface Standard Parallel Electrical Interface P1 Signal Table Standard Parallel Logical Interface
Read/Write Timing Detailed Register Decode
Ethernet Interface (To Be Implemented) Control Structure Hardware Ethernet‐IP‐UDP Stack Operation Frequency Tuning Manual Tuning Step Sweep List Sweep (To Be Implemented) Pulse Modulation External
Internal Exponential Modulation (To Be Implemented)
Acceptance Test Plan Frequency Accuracy Tuning Speed Amplitude Accuracy Amplitude Settling and Pulse Modulation
Spectral Purity RF Isolation Power Consumption Reference Mechanical
Testing Matrix
Test Data Sheets
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WARRANTY AND SERVICE
Service The CFT synthesizer contains no user‐serviceable parts. If you believe the synthesizer is malfunctioning, damaged, or not operating properly, discontinue use and contact API Defense.
Warranty and Repair API Defense does warrant and guarantee to the purchaser the quality of workmanship and materials used to provide satisfactory performance for a period of not less than one year from the date of delivery. During this one year (12 month) warranty period, API Defense will repair items excluding instances of accidental damage, abuse or subjection to potential greater than specified. Return shipping costs will be covered under a warranty repair. The warranty shall cover a period of 12 months from the time of receipt of the product. Extended warranties beyond this one year period can be purchased by contacting API Defense at 814‐467‐7693. COMPACT FAST TUNING (CFT) SYNTHESIZER FEATURES: CFT series synthesizers offer high performance signal generation in a small footprint. A rugged compact package and low power consumption are ideal for mobile applications as well as lab needs where fast tuning and spectral purity are required. This class of synthesizer can also be customized simplifying system integration by removing any additional glue logic.
• 1.60 – 18.0GHz Coverage • 100MHz internal reference (+/‐ 50 parts per billion (ppb)) • Switchable reference output • 10/100/1000Base‐T Ethernet interface (RJ‐45) • Programmable Pulse Width (PW) and Pulse Repetition Interval (PRI) • Exponential Modulation (Frequency and Phase) • 2us Switching Speed • Flexible control interface • Automatic Level Control • Phase Lock Status output bit • Continuous Wave, Sweep and List mode frequency control • Available internal user programmable logic, PowerPC, and memory
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CFT SERIES SYNTHESIZER SPECIFICATIONS:
Specification Parameter Value Units
Frequency 1.60 – 18.0 GHzSwitching Speed 2 μsSpurious ‐60 dBcHarmonics ‐30 dBcSub‐harmonics ‐60 dBcInternal Reference
Frequency 100 MHzStability +/‐ 100 ppb
Power (J2) 0 dBmPhase Noise (10 GHz)
1kHz ‐70 dBc/Hz10kHz ‐105 dBc/Hz
100kHz ‐110 dBc/Hz1MHz ‐118 dBc/Hz
Temperature ‐30 to +75 C (Case Temp)Output Power +8 dBm
Response +/‐1 dBOn to Off Isolation >70 dB
Rise Time (Off to On) <10 nsFall Time (On to Off) <10 ns
Min Pulse Width 10 nsPower <27 W
+12Vdc 1000 mA+5Vdc 2000 mA‐12Vdc 400 mA
Weight <1.5 kgSize 5.5x5.5x2 inches
Table 1 CFT SERIES SYNTHESIZER MOUNTING/INSTALLATION: The synthesizer housing is machined from solid aluminum stock with front panel, top and bottom dust covers securely attached. All housing components are nickel plated, and with exception to the bottom dust cover, all exterior surfaces are black powder coated. It is intended that the bottom cover be the mounting surface. Four #6‐32 spring loaded captive screws are provided for attachment.
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Captive Screws
Figure 1
Captive Screw Detail
Figure 2
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While not required, it is suggested that the bottom cover make a good thermal interface to some form of “chill plate”. Mounting to a heat sink such as a system chassis will minimize temperature gradient between ambient air and synthesizer housing, in turn, maximizing ambient operating temperature range. At 25C in “dead air”, the temperature gradient from ambient to synthesizer housing is approximately 18C. Specified operational temperature is based on unit case temperature. Standard connectors are used for power, RF, and digital control interfaces as listed in table 2.
Connectors Designator Function Connector Type J1 Ethernet 10/100/1000 Base‐T Interface RJ‐45J2 Reference Reference Output/Input SMA Female (Note 1) J3 RF Out RF Output Field Replaceable SMA Female
P1 Status/Control Digital Status and Control DSub High Density44(DB44HDM) P2 Power Power DSub 9 Pin Plug (DE9M)
Table 2 Front Panel Connectors Power Rear Panel Connector
Figure3 Figure4 POWER REQUIREMENTS The CFT Synthesizer requires three dc supply potentials. Supply Requirements
Volts Min (V) Max (V) Max Current (mA) +5 4.75 5.25 2100 +12 10 16 1100 ‐12 ‐16 ‐10 475
Table 3
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J2 Pinout Table Signal Name J1‐Pin
+5Vdc 1 +5Vdc Rtn 2 Chassis Gnd 3 +12Vdc 4
+12Vdc Rtn 5 Chassis Gnd 6 Chassis Gnd 7 ‐12Vdc Rtn 8 ‐12Vdc 9
Table 4
CFT SERIES SYNTHESIZER FUNCTIONAL DESCRIPTION: The CFT series synthesizer performs frequency synthesis over the 1.60 to 18.0GHz range. However, the fundamental frequency bandwidth is 1.60 to 3.20GHz. The remaining (3.20 – 18.0GHz) is comprised of sub‐octave bands generated by a series of frequency doublers and filters. Synthesizer tuning speed is not a function of absolute or differential frequency. RF Bands
Band Range (GHz) Multiplier0 1.60 ‐ 2.25 1 1 2.25 ‐ 3.20 1 2 3.20 – 4.50 2 3 4.50 – 6.40 2 4 6.40 – 9.00 4 5 9.00 – 12.8 4 6 12.8 – 18.0 8
Table 5 The standard output power level is +8dBm and is maintained by a digitally controlled Automatic Level Control (ALC) circuit. The ALC loop settles in less than 2us; power leveling is maintained during pulse modulation. A Xilinx Virtex‐4 Field Programmable Gate Array (FPGA) manages synthesizer operation, communications, and provides user programmable resources. FPGA configuration files are loaded via P1 Status/Control JTAG interface using standard Xilinx configuration tools. The JTAG chain consists of the Platform Memory and FPGA as shown below.
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Simplified Block Diagram
Figure 5
Frequency Synthesis A Voltage Controlled Oscillator (VCO) covering the fundamental frequency range is ultimately phase locked to a 100MHz Oven Controlled Crystal Oscillator (OCXO) through the use of a unique hybrid Phase Lock Loop (PLL). The standard unit employs an internal high performance OCXO with +/‐50ppb long term stability over the operating temperature range. The 100MHz internal reference is available on J2 (SMA female). The 100MHz reference output can be switched off.
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Internal Reference Output:
Reference Output Specification Parameter Value Tolerance Frequency 100MHz +/‐ 50 ppb Power 0dBm +/‐ 1dB
Waveform Sine‐Wave Harmonics ‐50dBc Max Spurious ‐100dBc Max
Phase Noise (Offset) 100Hz 1kHz 10kHz
‐120dBc/Hz ‐150dBc/Hz ‐155dBc/Hz
Max Max Max
Warm Up Time To <.1ppm
60 Seconds Max
On/Off Isolation 60dB Min Table 6 CFT synthesizers can be factory configured to accept an external source of many standard reference frequencies. Note that the RF phase noise to an offset of approximately 5 kHz is a function of the input reference phase noise.
The PLL can achieve a frequency resolution of (.1164Hz). However, the effective resolution is 8
times greater due to frequency multiplication. This also represents the intrinsic frequency error of the PLL. The maximum intrinsic frequency error is approximately .9313Hz. Frequency tuning is guaranteed to be monotonic in all tuning modes. STATUS AND CONTROL ARCHITECTURE Control and status monitoring can be performed over the Ethernet Port, Parallel Port or both. While CFT synthesizers ship with a standard interface, depending on available skill sets, the interface and synthesizer control architecture can be modified to suit a particular system design or implement custom algorithms. Hardware resources have also been set aside for customer use. A VHDL development model is available with simplified interfaces implemented as records. Standard Parallel Electrical Interface The parallel interface is on the P1 Status/Control connector. Electrically the interface consists of a 27‐bit bi‐directional bus, 2 dedicated output bits and 2 dedicated input bits. The bi‐directional bus is constituted by three, 8‐bit banks and a single, 3‐bit bank. The direction of each bank is controlled by a direction bit sourced from the FPGA as shown in figure 6.
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Bi‐directional Configuration
Figure 6
The three dedicated input bits are terminated with a resistor network with a Thevenin impedance of 121 Ohms as shown in figure7. Input only with resistive termination
P1 Status/Control
+3.3V
GND
Buffered Input FPGAInput221
2703-bits input
Figure 7
Two output only bits are also available. Output only signaling
Figure 8
The parallel port can interface to +3.3V as well as +5V systems and will accept inputs of up to +7V without damage. DC Control Levels
Parameter Min Max Absolute DC Input Voltage ‐0.5V +7.0V
High‐ Input Level +2.2V Low‐ Input Level +0.8V High‐ Output Level +2.6V Low‐ Output Level +0.1V
Table 7
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J1 Status/Control Electrical J1‐Pin Mode Termination 1 Input/Output 1k Pull‐Up 2 Input/Output 1k Pull‐Up 3 Input/Output 1k Pull‐Up 4 Input/Output 1k Pull‐Up 6 Input/Output 1k Pull‐Up 7 Input/Output 1k Pull‐Up 8 Input/Output 1k Pull‐Up 9 Input/Output 1k Pull‐Up 11 Input/Output 1k Pull‐Up 12 Input/Output 1k Pull‐Up 13 Input/Output 1k Pull‐Up 14 Input/Output 1k Pull‐Up 16 Input/Output 1k Pull‐Up 17 Input/Output 1k Pull‐Up 18 Input/Output 1k Pull‐Up 19 Input/Output 1k Pull‐Up 21 Input/Output 1k Pull‐Up 22 Input/Output 1k Pull‐Up 23 Input/Output 1k Pull‐Up 24 Input/Output 1k Pull‐Up 26 Input/Output 1k Pull‐Up 27 Input/Output 1k Pull‐Up 28 Input/Output 1k Pull‐Up 29 Input/Output 1k Pull‐Up 31 Input/Output 1k Pull‐Up 32 Input/Output 1k Pull‐Up 33 Input/Output 1k Pull‐Up 34 Output none 36 Output none 37 Input 270 Ohm Thevenin 38 Input 270 Ohm Thevenin 39 Input 270 Ohm Thevenin 40 Input 4.7k Pull‐Up 41 Input 4.7k Pull‐Up 42 Output 4.7k Pull‐Up 43 Input 4.7k Pull‐Up 44 Output N/A 5 Digital Signal Return N/A 10 Digital Signal Return N/A 15 Digital Signal Return N/A 20 Digital Signal Return N/A 25 Digital Signal Return N/A 30 Digital Signal Return N/A 35 Digital Signal Return N/A
Table 8 Standard Parallel Logical Interface The standard logical interface consists of the following signals:
• 16‐Data Bits (Data(16:0)) • 8‐Address Bits (Address(6:0)) • Data OE# • Data Strobe • RF OE# • REF OE# • Phase Lock # • Multiplexed Output
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Parallel Logical Signal Listing Signal Mode Description
Data(15:0) Bi‐Directional Read/Write Data Lines Address(6:0) Input Address Lines Data OE# Input Output Enable (Active low)
Data Strobe Input Dynamic Latch (Falling Edge) RF OE# Input Microwave Output Enable (Active low) REF OE# Input 100MHz Reference Output Enable (Active low)
Phase Lock# Output Synthesizer Phase Lock Status (Lock = low) Multiplexed Output Output Configurable Output Pin
Table 9
J1 Status/Control Logical Signal Name J1‐Pin Description Direction
Data 0 1 Data Bit, 1k Pull‐UP (Bank 0) Input/Output Data 1 2 Data Bit, 1k Pull‐UP (Bank 0) Input/Output Data2 3 Data Bit, 1k Pull‐UP (Bank 0) Input/Output Data3 4 Data Bit, 1k Pull‐UP (Bank 0) Input/Output Data4 6 Data Bit, 1k Pull‐UP (Bank 0) Input/Output Data5 7 Data Bit, 1k Pull‐UP (Bank 0) Input/Output Data6 8 Data Bit, 1k Pull‐UP (Bank 0) Input/Output Data7 9 Data Bit, 1k Pull‐UP (Bank 0) Input/Output Data8 11 Data Bit, 1k Pull‐UP (Bank 1) Input/Output Data9 12 Data Bit, 1k Pull‐UP (Bank 1) Input/Output Data10 13 Data Bit, 1k Pull‐UP (Bank 1) Input/Output Data11 14 Data Bit, 1k Pull‐UP (Bank 1) Input/Output Data12 16 Data Bit, 1k Pull‐UP (Bank 1) Input/Output Data13 17 Data Bit, 1k Pull‐UP (Bank 1) Input/Output Data14 18 Data Bit, 1k Pull‐UP (Bank 1) Input/Output Data15 19 Data Bit, 1k Pull‐UP (Bank 1) Input/Output Address0 21 Address Bit, 1k Pull (Bank 2) Input Address1 22 Address Bit, 1k Pull (Bank 2) Input Address2 23 Address Bit, 1k Pull (Bank 2) Input Address3 24 Address Bit, 1k Pull (Bank 2) Input Address4 26 Address Bit, 1k Pull (Bank 2) Input Address5 27 Address Bit, 1k Pull (Bank 2) Input Address6 28 Address Bit, 1k Pull (Bank 2) Input Address7 29 Address Bit, 1k Pull (Bank 2) Input Data OE# 31 Transceiver Direction Input SPARE 32 Spare Bit, 1k Pull (Bank 3) Input SPARE 33 Spare Bit, 1k Pull (Bank 3) Input
Mux Output 34 Multiplexed Output 1k Pull‐up Output Phase Lock# 36 Phase Lock Indicator Lock = '0' , 1k Pull‐up Output Ref OE# 37 100MHz Reference Control ON = '0', 270 Thevenin Input RF OE# 38 RF Output Control ON = '0', 270 Thevenin Input
Data Strobe 39 Dynamic Latch On Falling Edge, 270 Thevenin Input JTAG TMS 40 JTAG Test Mode Select, 4.7k Pull‐up Input JTAG TDI 41 JTAG Test Data Input, 4.7k Pull‐up Input JTAG TDO 42 JTAG Test Data Output, 4.7k Pull‐up Input JTAG TCK 43 JTAG Test Clock, 4.7k Pull‐up Input JTAG +3.3V 44 JTAG Supply Voltage, +3.3V Supply Rail Output Digital Rtn 5 Digital Signal Return GND Digital Rtn 10 Digital Signal Return GND Digital Rtn 15 Digital Signal Return GND Digital Rtn 20 Digital Signal Return GND Digital Rtn 25 Digital Signal Return GND Digital Rtn 30 Digital Signal Return GND Digital Rtn 35 Digital Signal Return GND
Table 10 Synthesizer parameters such as frequency, pulse width and pulse repetition interval are set by internal register values. To change a register value, the data and address bus is driven with the appropriate signals, Data OE# is driven high and data strobe is pulsed low. Data is latched into a register on the falling edge of the data strobe. Register values can be read by driving the address lines and Data OE# low.
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Simplified Control Architecture
Note: For simplification not all registers are illustrated.
Figure 9
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Registers
16‐Bit Register Address (hex) Mode Description Firmware Version 00 Read Only FPGA Image Version IP Address(1) 01 Read/Write IP address upper 16‐bits IP Address(0) 02 Read/Write IP address lower 16‐bits
UDP Local Source Port 03 Read/Write Local UDP port number UDP Destination Port 04 Read/Write Destination UDP port number
MAC Physical Address(2) 05 Read Only MAC address bits 47 down to 32 MAC Physical Address(1) 06 Read Only MAC address bits 31 down to 16 MAC Physical Address(0) 07 Read Only MAC address bits 15 down to 0
Pulse Width(1) 08 Read/Write Pulse Width upper 16‐bits Pulse Width(0) 09 Read/Write Pulse Width lower 16‐bits
Pulse Repetition Interval(1) 0A Read/Write PRI upper 16‐bits Pulse Repetition Interval(0) 0B Read/Write PRI lower 16‐bits
Temperature 0C Read Only Temperature 12‐bits Control 0D Read/Write Synthesizer Control bits
Start Frequency 0E Read/Write Sweep Start Frequency Stop Frequency 0F Read/Write Sweep Stop Frequency
Step Size 10 Read/Write Sweep Frequency Step Size Dwell Time(1) 11 Read/Write Sweep Dwell Time upper 16‐bits Dwell Time(0) 12 Read/Write Sweep Dwell Time lower 16‐bits
Current Frequency FF Read/Write Current Frequency Value Table 11 Note that since all data, address and bus direction lines are terminated with pull‐up resistors, the bus default address and mode is Current Frequency, Write. Read/Write Timing Register Write Timing Diagram
wsut
whdtwswt
hzt
Figure 10
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Write Timing Requirements
Parameter Symbol Specification Write Setup wsut 21.5ns Min
Write Hold whdt 21.5ns Min
OE# high to 3‐State Output hzt 20ns Max
Minimum Strobe Width wswt 20ns Min
Table 12 Register Read Timing Diagram
radtrart
oet
Figure 11 Read Timing Requirements
Parameter Symbol Specification OE# low to Active Output oet 35ns Max
Read Address to Data radt 35ns Max
Read Address Rate rart 35ns Min
Table 13 Detailed Register Decode Firmware Register Address: x”00” Mode: Read Only Default: Current Firmware Version Description: This 16‐bit register is factory set containing the FPGA image revision code used for
configuration management. The firmware register is read only.
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
FW5 FW14 FW13 FW12 FW11 FW10 FW9 FW8 FW7 FW6 FW5 FW4 FW3 FW2 FW1 FW0
D(15:0) : Firmware Version Number; FW(15:0) .
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IP Address MSB Address: x”01” Mode: Read/Write Default: TBD Description: This register contains the upper 16‐bits of the local IP address.
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
LIP31 LIP30 LIP29 LIP28 LIP27 LIP26 LIP25 LIP24 LIP23 LIP22 LIP21 LIP20 LIP19 LIP18 LIP17 LIP16
D(15:0): Local IP Address upper 16‐bits; LIP(31:16). IP Address LSB Address: x”02” Mode: Read/Write Default: TBD Description: This register contains the lower 16‐bits of the local IP address.
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
LIP15 LIP14 LIP13 LIP12 LIP11 LIP10 LIP9 LIP8 LIP7 LIP6 LIP5 LIP4 LIP3 LIP2 LIP1 LIP0
D(15:0): Local IP Address lower 16‐bits; LIP(15:0). UDP Local Source Port Number Address: x”03” Mode: Read/Write Default: TBD Description: This register contains the local UDP port number.
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
LP15 LP14 LP13 LP12 LP11 LP10 LP9 LP8 LP7 LP6 LP5 LP4 LP3 LP2 LP1 LP0
D(15:0): Local UDP Port Number; LP(15:0). UDP Destination Port Number Address: x”04” Mode: Read/Write Default: TBD Description: This register contains the destination UDP port number.
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
DP15 DP14 DP13 DP12 DP11 DP10 DP9 DP8 DP7 DP6 DP5 DP4 DP3 DP2 DP1 DP0
D(15:0): Destination UDP Port Number; DP(15:0).
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MAC Address(2) Address: x”05” Mode: Read Only Default: TBD Description: This register contains the upper physical address bytes.
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
PH47 PH46 PH45 PH44 PH43 PH42 PH41 PH40 PH39 PH38 PH37 PH36 PH35 PH34 PH33 PH32
D(15:0): Physical MAC Address; PH(47:32). MAC Address(1) Address: x”06” Mode: Read Only Default: TBD Description: This register contains the center physical address bytes.
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
PH31 PH30 PH29 PH28 PH27 PH26 PH25 PH24 PH23 PH22 PH21 PH20 PH19 PH18 PH17 PH16
D(15:0): Physical MAC Address; PH(31:16). MAC Address(0) Address: x”07” Mode: Read Only Default: TBD Description: This register contains upper physical address bytes.
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
PH15 PH14 PH13 PH12 PH11 PH10 PH9 PH8 PH7 PH6 PH5 PH4 PH3 PH2 PH1 PH0
D(15:0): Physical MAC Address; PH(31:0). Pulse Width(1) Address: x”08” Mode: Read/Write Default: TBD Description: This register contains upper pulse width bytes.
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
PW31 PW30 PW29 PW28 PW27 PW26 PW25 PW24 PW23 PW22 PW21 PW20 PW19 PW18 PW17 PW16
D(15:0): Pulse Width; PW(31:16).
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Pulse Width(0) Address: x”09” Mode: Read/Write Default: TBD Description: This register contains lower pulse width bytes.
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
PW15 PW14 PW13 PW12 PW11 PW10 PW9 PW8 PW7 PW6 PW5 PW4 PW3 PW2 PW1 PW0
D(15:0): Pulse Width; PW(15:0). Decode:
31: 0 10 Pulse Repetition Interval(1) Address: x”0A” Mode: Read/Write Default: TBD Description: This register contains upper pulse repetition interval bytes.
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
PR31 PR30 PR29 PR28 PR27 PR26 PR25 PR24 PR23 PR22 PR21 PR20 PR19 PR18 PR17 PR16
D(15:0): Pulse Repetition Interval; PR(31:16). Pulse Repetition Interval(0) Address: x”0B” Mode: Read/Write Default: TBD Description: This register contains lower pulse repetition interval bytes.
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
PR15 PR14 PR13 PR12 PR11 PR10 PR9 PR8 PR7 PR6 PR5 PR4 PR3 PR2 PR1 PR0
D(15:0): Pulse Repetition Interval; PR(15:0). Decode:
31: 0 10
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Temperature Address: x”0C” Mode: Read Only Default: TBD Description: This register contains current 12‐bit internal synthesizer temperature.
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
NU NU NU NU T11 T10 T9 T8 T7 T6 T5 T4 T3 T2 T1 T0
D(15:0): Temperature; PR(11:0). Decode:
11: 0 .038 55 Control Register Address: x”0D” Mode: Read/Write Default: TBD Description: This register contains synthesizer configuration control register.
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
NU NU NU NU NU NU NU NU NU NU SWEN FRSC1 FSRC0 REFEN RFEN PEN
D(0): PEN; Enables internal pulse modulator Active high. D(1): RFEN; Master RF output Enable bit Active high. D(2): REFEN; Master Reference output Enable bit Active high. D(4:3); FRSC(1:0); Current Frequency Register source. D(5); SWEN; Sweep Enable Active high. FRSC(1:0) Decode: “00” = Parallel Port “01” = RAM “10” = Sweep Counter Start Frequency Address: x”0E” Mode: Read/Write Default: TBD Description: This register contains frequency sweep start frequency.
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
SF15 SF14 SF13 SF12 SF11 SF10 SF9 SF8 SF7 SF6 SF5 SF4 SF3 SF2 SF1 SF0
D(15:0): Sweep Start Frequency; SF(15:0). Decode:
15: 0 .5 1600
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Stop Frequency Address: x”0F” Mode: Read/Write Default: TBD Description: This register contains frequency sweep start frequency.
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
STF15 STF14 STF13 STF12 STF11 STF10 STF9 STF8 STF7 STF6 STF5 STF4 STF3 STF2 STF1 STF0
D(15:0): Sweep Stop Frequency; SF(15:0). Decode:
15: 0 .5 1600 Step Size Address: x”10” Mode: Read/Write Default: TBD Description: This register contains frequency sweep step size.
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
STP15 STP14 STP13 STP12 STP11 STP10 STP9 STP8 STP7 STP6 STP5 STP4 STP3 STP2 STP1 STP0
D(15:0): Frequency sweep step size; STP(14:0). Decode:
15: 0 .5 Dwell Time(1) Address: x”11” Mode: Read/Write Default: TBD Description: This register contains upper bytes of sweep dwell time per unit frequency step.
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
DT31 DT30 DT29 DT28 DT27 DT26 DT25 DT24 DT23 DT22 DT21 DT20 DT19 DT18 DT7 DT16
D(15:0): Step dwell time; DT(31:16).
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Dwell Time(0) Address: x”12” Mode: Read/Write Default: TBD Description: This register contains lower bytes of sweep dwell time per unit frequency step.
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
DT15 DT14 DT13 DT12 DT11 DT10 DT9 DT8 DT7 DT6 DT5 DT4 DT3 DT2 DT1 DT0
D(15:0): Step dwell time; DT(15:0). Decode:
31: 0 10 Current Frequency Address: x”FF” Mode: Read/Write Default: TBD Description: This register contains currently tuned frequency.
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
CF15 CF14 CF13 CF12 CF11 CF10 CF9 CF8 CF7 CF6 CF5 CF4 CF3 CF2 CF1 CF0
D(15:0): Sweep Stop Frequency; SF(15:0). Decode:
15: 0 .5 1600 OPERATION: Frequency Tuning Manual Tuning Manual frequency tuning is accomplished by driving the address /data lines and pulling the tune strobe low. The data strobe line is sampled and the detection of a falling edge launches the tuning process. The output is blanked for 2us during tuning. Any falling edge of the tuning strobe during the tuning period will not initiate a new tuning process but will update the current frequency register. The addressing of Current Frequency Register (x”FF”) notes special consideration. Since all the parallel inputs are pulled‐up, DATA OE# and the Address(7:0) need not be driven. In other words, the default mode of operation is register write to address x”FF” the Current Frequency Register.
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Frequency Tuning Timing
rfOntrfOfft
strt
Figure 12 Tune Timing Specification
Parameter Symbol Min Max Tune Strobe to RF Off rfOfft 55ns 70ns
Tune Strobe to RF On/Phase Lock rfOnt 1.950us 2.000us
Frequency strobe update strt 2.00us ****
Table 14 Frequency Sweep Frequency step sweeping is accomplished by loading the Start Frequency (x”0E”), Stop Frequency (x”0F”), Step Size (x”10”) and Dwell Time (x”11”, x”12”) registers and setting Control (x”0D”) register bit SWEN (D5) high. This will cause the synthesizer to sweep from the ”Start Frequency” to the “Stop Frequency” in steps of “Step Size” with a delay at each frequency point of “Dwell Time”. The dwell is the time after frequency lock. Other modulation techniques are compatible with the frequency sweep where each of the modulation state machines are reset during the tuning interval and released after locking period of 2us.
Sweep Diagram with Stop Frequency greater than Start Frequency
Figure 13
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The relative magnitude of the start and stop frequencies will determine step direction as illustrated in figure 13 and 14
Sweep Diagram with Stop Frequency less than Start Frequency
Figure 14
During frequency sweep, the Current Frequency register (x”FF”) is updated allowing for determination of the currently tuned frequency by performing a register read by addressing and pulling DATAOE# to a logical low. Phase lock can be used as a latching signal. List Mode Functionality To Be Added Pulse Modulation The CFT synthesizer has a fast and high isolation switch on its output allowing for pulse modulation. The switch provides greater than 70dB isolation with <10ns rise/fall times. Pulse Modulation can be performed manually through RFOE# or internally through the internal pulse modulation machine. Note that even when in internal modulation, RFOE# will disable the RF output signal. External Pulse Modulation Timing
OErft
rtrft ftrft Figure 15
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Pulse Modulation Timing Specification
Parameter Symbol Specification RFOE# Low to 90% RF Output OErft <45 ns
RF rise time 10% to 90% rtrft <10ns
RF fall time 90% to 10% ftrft <10ns
Table 15
The pulse modulation machine is held reset by a frequency tuning event until the 2us tuning period ends. For example, the number of pulses per frequency point can be controlled. Consider the following settings: Pulse Width: 1us Pulse Repetition Interval: 3us
Start Frequency: 1600MHz Stop Frequency: 18000MHz
Dwell Time: 6us These settings will result in a train of 1us pulses with a 3us interval where the frequency changes every 2nd pulse as shown below in figure 16. Pulse Train Generation
Figure 16
Digital Exponential Modulation Functionality To Be Added
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ACCEPTATNCE TEST PLAN: Procedure 1.1 Frequency Accuracy: The synthesizer is manually tuned under software control from 1600MHz to 18000MHz in 25MHz steps for a total of 657 points. At each point, frequency error is recorded and plotted with frequency on x‐axis and error in ppb (parts per billion) on y‐axis. The frequency sweep engine will be exercised to verify operation. Specification:
Frequency Accuracy: +/‐ 100ppb Frequency Accuracy Test Configuration
UUT
Bench Power
Supplies
Personal Computer
USB Test
Fixture
P1
P2 Spectrum Analyzer
Router
J3
Figure 17
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Procedure 1.2 Tuning Speed: The synthesizer is manually tuned over the fundamental frequency range to ensure switching speed of less than 2us. The particular start frequencies and stop frequencies are listed below. This test performs an autocorrelation of the output RF signal as illustrated. The oscilloscope is triggered on the falling edge of tune strobe. The correlated video is to settle less than 2us from the falling edge of the tune strobe. Specification:
Switching Speed: <2us
Tuning Speed Test Configuration
Figure 18
Tuning Test Locations Run # Start Frequency (MHz) Stop Frequency(MHz) 1 1600 3200 2 3200 1600 3 1600 2400 4 2400 1600 5 2400 3200 6 3200 2400
Table 16
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Procedure 1.3 Amplitude Accuracy: The synthesizer is manually tuned under software control from 1600MHz to 18000MHz in 25MHz steps for a total of 657 points. At each point, amplitude error is recorded and plotted with frequency on x‐axis and error in dB on the y‐axis. Specification:
Output Amplitude: +8dBm, +/‐ 1dB Power Accuracy Test Configuration
UUT
Bench Power
Supplies
Personal Computer
USB Test
Fixture
P1
P2 USB Power SensorJ3
Figure 19
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Procedure 1.4 Amplitude Settling and Pulse Modulation: The synthesizer is manually tuned in frequency according to the table17. At each step, the settling of amplitude video is noted to ensuring output power settling in 2us. This procedure will also verify RF output rise and fall times and latency of RF OE# to 10 and 90% amplitude video levels. The internal pulse modulation engine will be exercised to verify operation. Specification:
Amplitude settling : 2us Rise Time: <10ns Fall Time: <10ns RF OE# Delay: <45 ns Amplitude settling and pulse modulation configuration
UUT
Bench Power
Supplies
Personal Computer
USB Test
Fixture
P1
P2 4-Channel Oscilloscope
Tune Strobe
RfOe
J3 Ampitude Video15dB
Detector Diode
Figure 20 Amplitude Test Frequencies
Run # Start Frequency (MHz) Stop Frequency(MHz) 1 1600 18000 2 18000 6400 3 6400 12800 4 12800 2250
Table 17 At each of the start frequencies according to table 17, RF OE# will be toggled with 50% duty cycle and a pulse width of 1us. The amplitude video rise and fall times will be noted.
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Procedure 1.5 Spectral Purity: The synthesizer is manually tuned according to table 18. At each point, spurious/harmonic content and phase noise are measured. Specification:
Spurious Content: <‐60dBc Harmonic Content: < ‐30dBc Phase Noise: (see note below) 1kHz : ‐70dBc/Hz
10kHz: ‐105dBc/Hz 100kHz: ‐110dBc/Hz 1MHz: ‐118dBc/Hz Note: The phase noise specification is referenced at 10GHz. Phase noise of this synthesizer is a function of frequency and phase noise translation factor must be summed to the specified frequency phase noise at each offset. The function is given below.
20 log
Spectral purity test configuration
UUT
Bench Power
Supplies
Personal Computer
USB Test
Fixture
P1
P2 Spectrum Analyzer
Router
J3
Figure 21
Spectral Purity Test Frequencies
Run # Test Frequency (MHz) 1 1600
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2 2250 3 3200 4 4500 5 5450 6 6400 7 7700 8 9000 9 10900 10 12800 11 15400 12 18000
Table 18 Procedure 1.6 On to Off RF Isolation: The synthesizer is manually tuned in frequency according to the table 18. At each point using spectral purity test configuration, the on to off RF isolation is measured. Specification: On to Off Isolation: >70dB Procedure 1.7 Power Consumption: The synthesizer is manually tuning to the frequency points listed in table 19. At each point, the +12Vdc, ‐12Vdc and +5Vdc power line currents are measured. The RF and Reference outputs will be enabled and terminated. Specification: Max Current +12Vdc: 1100mA Max Current ‐12Vdc: 475mA Max Current +5Vdc: 2100mA Power Consumption Test Frequencies
Run # Test Frequency (MHz) 1 1600 2 9800 3 18000
Table 19
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Procedure 1.8 Reference Output: The reference output power, frequency, spurious/harmonic content and on to off isolation is measured. Specification: Output Power: 0dBm +/‐ 1dB Frequency Accuracy: +/‐100ppb Harmonics: <‐50dBc Spurious: <‐90dBc On/Off Isolation: >60dB Reference Test Configuration
UUT
Bench Power
Supplies
Personal Computer
USB Test
Fixture
P1
P2 Spectrum Analyzer
Router
J2
Figure 22 Procedure 1.9 Mechanical The synthesizer is to be inspected to ensure all hardware is installed and tightened accordingly. The appearance is to be new free of scratches or any other blemishes. The mechanical dimensions according to Drawing (TBD) are to be measured. The unit is to be weighed. Specification: Appearance: Mint/New Weight: <1.5kg Dimensions: See Drawing(TBD)
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Testing Matrix: Testing will be performed according to table20. Any major revision as determined by Kuchera Engineering, will require Engineering testing as listed in the testing matrix. Additional testing beyond the standard may be ordered. Testing Matrix
Procedure ‐30C +25C +70C 1.1 Frequency Accuracy S S S 1.2 Switching Speed E,O S E,O 1.3 Amplitude Accuracy S S S 1.4 Amplitude Settling E,O S E,O 1.5 Spectral Purity E,O S E,O 1.6 RF On/Off Isolation E,O S E,O 1.7 Power Consumption E,O S E,O 1.8 Reference Performance E,O S E,O
Table 20 Testing Key E = Major Revision/Engineering Test S = Standard Testing O= Optional Testing
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Test Data Sheet 1 of 11 SN: ________________ Procedure 1.1 Date: ________________ Frequency Accuracy
‐30C +25C +70C Pass Fail Pass Fail Pass Fail
_________________ _________________ _________________ Initials Initials Initials
Comments: Paste Data Plots Below.
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Test Data Sheet 2 of 11 SN: ________________ Procedure 1.2 Date: ________________ Tuning Speed
‐30C +25C +70C Run#1 Pass Fail Pass Fail Pass Fail
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Test Data Sheet 3 of 11 SN: ________________ Procedure 1.3 Date: ________________ Amplitude Accuracy
‐30C +25C +70C Pass Fail Pass Fail Pass Fail
_________________ _________________ _________________ Initials Initials Initials
Comments: Paste Data Plots Below.
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Test Data Sheet 4 of 11 SN: ________________ Procedure 1.4 Date: ________________ Amplitude Settling and Pulse Modulation
‐30C +25C +70C Run#1 Pass Fail Pass Fail Pass Fail
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Comments:
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Test Data Sheet 5 of 11 SN: ________________ Procedure 1.5 Date: ________________ Spectral Purity
‐30C +25C +70C Run#1 Pass Fail Pass Fail Pass Fail
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‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐ Run#2 Pass Fail Pass Fail Pass Fail
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Test Data Sheet 6 of 11 SN: ________________ Procedure 1.5( Sheet 2) Date: ________________ Spectral Purity
‐30C +25C +70C Run#7 Pass Fail Pass Fail Pass Fail
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Test Data Sheet 7 of 11 SN: ________________ Procedure 1.6 Date: ________________ Isolation
‐30C +25C +70C Run#1 Pass Fail Pass Fail Pass Fail
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Test Data Sheet 8 of 11 SN: ________________ Procedure 1.6( Sheet 2) Date: ________________ Spectral Purity
‐30C +25C +70C Run#7 Pass Fail Pass Fail Pass Fail
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Test Data Sheet 9 of 11 SN: ________________ Procedure 1.8 Date: ________________ Power Consumption
‐30C +25C +70C +12Vdc Pass Fail Pass Fail Pass Fail _________________ _________________ _________________ Current (mA) Current (mA) Current (mA)
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‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐ ‐12Vdc Pass Fail Pass Fail Pass Fail _________________ _________________ _________________ Current (mA) Current (mA) Current (mA)
_________________ _________________ _________________ Initials Initials Initials
‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐ +5Vdc Pass Fail Pass Fail Pass Fail _________________ _________________ _________________ Current (mA) Current (mA) Current (mA)
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‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐ Comments:
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Test Data Sheet 10 of 11 SN: ________________ Procedure 1.8 Date: ________________ Reference
‐30C +25C +70C Output Pass Fail Pass Fail Pass Fail Power
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CFT Series Synthesizer Draft Rev‐B
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Test Data Sheet 11 of 11 SN: ________________ Procedure 1.9 Date: ________________ Mechanical Inspection Appearance Pass Fail
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____________________________________________ Weight Pass Fail
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____________________________________________ Dimensions Pass Fail
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