WIRELESS-COMMUNICATION SYSTEMS - zabroadcast.za.net/bi pdf/WISYCOM Wireless communication...

WIRELESS-COMMUNICATION SYSTEMS

CRT 16

Communication full-duplex belt transceiver IEM and talk-back pocket receiver

1

CPR 30

• Both RX and TX can fit in the same UHF band (400 ÷ 550 MHz).• Very close frequency’s distance between RX and TX channels

(10 MHz only) allows full-duplex operations with exceptionalworking quality, flexibility and great frequency’s saving.

• Only two adjacent 8 MHz TV channels are enough to allocatean intermodulation-free multi-channel full-duplex system.

• 16 RX + 16 TX switchable frequencies in the units.• Narrow-band or medium-band operation improves flexibility

and frequency’s saving.• Outstanding audio quality and exceptional low-noise operations. • Easy PC frequency-reprogramming by the user

(in the pre-set switching-windows). • Carefully designed audio in/out circuits allow the use of

any kind of brand mic/headphones set, coupled by sturdymulti-pole connector.

• Suitable for very complex multi-channel systems, thanks tothe extremely-high RX-intermodulation immunity and theoutstanding TX-signal clearness.

• Exceptional sturdiness and absolute reliability.

• UHF band (400 ÷ 530 MHz).• Great switching-window (10 MHz).• 32 switchable frequencies in 2 groups.• Narrow-band or medium-band operation improves flexibility

and frequency’s saving.• Superb audio quality and exceptional low-noise operations.• Easy PC frequency-reprogramming by the user

(in the pre-set switching-windows).• Supplied with Fischer or jack (mono or stereo) audio connector.• It works with any kind of headphones or earpieces.• Suitable for very complex multi-channel systems, thanks to

the extremely-high intermodulation immunity and RF/IFselectivity.


Nowadays there is a need of a timely and reliableexchange of important information and contentsbetween people.You need to speak… to listen at the same time and tobe of course clearly understandable! At this purposefrom long time Wisycom has been elaborating a high-technology to project its wireless “Full-duplex

intercom” and “In Ear Monitoring & Talk-back” systems. These systems are able to work with a medium-bandand narrow-band transmitting mode, and they havebeen developed for professional applications in theBroadcast, Theatres and Sound-reinforcements fields. Wisycom high-technology, thanks to its long-experience,allows to work without any noise, annoyance or trouble.

audio line(RX output)

2-wire line(RX diversityswitching)

AF input

AF output

to otherSlave Units


FULL-DUPLEX BIDIRECTIONAL SYSTEMS

Thanks to its fully modular compositions, you can make up severalBase Units configurations. As for the Unidirectional Systems, full-duplex systems can be mountedeither in Portable Minirack (with different widths, depending on therequired number of modules) and in standard 19”/1U or 19”/3U rack-frames. The Base Unit can be one single-channel or multi-channel type.The are available two types of Transmitters and Receiver Modules: ina vertical-shape (3U height) and horizontal-shape (1U height).Regarding the output power of the Transmitters, we are used to offerunits with an output power that can be factory pre-set in a valuebetween 10 mW (to comply the ETSI norms related to free-use BaseUnits in UHF TV frequency range, is it a more than suitable power tocover a big TV studio) and 300 mW (that allows a great operatingdistance up to more than one mile). 2W Transmitter Module (in a ver-tical shape) is available for even longer distances.The working frequencies can be set in two 7 MHz switching-windowsbetween 400 ÷ 550 MHz, with a minimum distance of about 10 MHzbetween them.The Transmitter and Receiver Modules are endowed with a balancedand ground-isolated audio line connections. The audio input of theTransmitter has a very great input-level adjustment capability, to allowthe easiest connection with all type of audio sources. The output levelof the Receiver Module is in the range of “line” value.

2

CFK 50-Master(with antennas)

CFK 50-Slave #1(with antennas)



CFK 50Composed by:n.1 - CST 50, transmitter module (300 mW max.)n.1 - CSR 50, receiver modulen.1 - PSS 25, mains power-supply modulen.1 - RPT 22, portable minirackn.2 - antennas (various types)

EXAMPLES OF BIDIRECTIONAL BASE UNITS

CFK 503 (multichannel customized version)

Composed by:n.3 max - different units (transmitters or receivers)n.1 - RST 503, 19”/1U rack-frame

with built-in mains power-supply n.3 max - antennas (various types)

CFK 350-C (multichannel customized version)

Composed by:n.7 max - places for different units (transmitters,

receivers, RF-splitter, audio interface)n.1 - PSS 25, mains power-supply modulen.1 - RST 22-S, 19”/3U rack-framen.2 - antenna-sets (various types)

CFK 50-D Composed by:n.1 - CST 50-D, desktop transmitter (300 mW max.)n.1 - PSP 910, mains power-supplyn.1 - antenna (various types)

CSR 50-D Composed by:n.1 - CSR 50-D, desktop receivern.1 - PSP 910, mains power-supplyn.1 - antenna (various types)

EXAMPLE OF ONE BIDIRECTIONAL COMMUNICATION SYSTEM with several Base-Units in “master/slave” configuration(see description on page 6)

Subject to change without notice

3

TECHNICAL SPECIFICATIONS:• Switchable channels : 16, preset in the 400 ÷ 550 MHz range (others on request).• Switching-window : 7 MHz (others on request). • Frequencies : microprocessor controlled frequency synthesizer circuit,

with 5 and/or 6.25 KHz minimum step. They are easily user-re-programmable by PC and optional“UPK32 Programming kit”.

• Channel spacing : 12.5 or 20 or 25 or 50 KHz [1].• Frequency error : < ± 2 ppm, in the rated temperature range.• Temperature range : -10 ÷ +55 °C.• RF output power : ⇒ CST 50 = can be pre-set between: 300 mW ÷ 10 mW (± 1 dB) [1].

⇒ CST 36 = switchable between 2W - 300 mW (± 1 dB)• RF output impedance : 50 ohm (with type N-Female connector).• Spurious emissions : < 2 nW.• Modulation : FM (nom. deviation = ±1.7 or ±2.5 or ±3.3 or ±5.5 KHz,

depending on the channel spacing).• Audio input : transformer balanced, floating.• Audio input level : with Micro / Line selector, can be adjusted externally between:

⇒ Micro -54 ÷ -23 dBu (1.5 ÷ 55 mVrms).(Impedance = > 2 kohm)

⇒ Line -23 ÷ +8 dBu (55 ÷ 1950 mVrms)(Impedance = > 10 kohm)

• Peak-limiter : automatic, with dynamic-range > 20 dB over the level set for the nominal modulation.

• NR-system : compander circuit, pre-set in “Wisycom-NR” mode or excluded.• Pre-emphasis : 75 µS or 750 µS or off (to be compatible with units of other brands).• AF bandwidth : ⇒ 300 Hz ÷ 2.5 KHz (-3 dB), for 12.5 KHz channel spacing;

⇒ 300 Hz ÷ 3.3 KHz (-3 dB), for 20 KHz channel spacing;⇒ 300 Hz ÷ 4.5 KHz (-3 dB), for 25 KHz channel spacing;⇒ 300 Hz ÷ 8 KHz (-3 dB), for 50 KHz channel spacing.

• Distortion : < 0.5 % (0.25% typ.).• SND/D ratio : > 80 dB (83 dB typ.), CCITT measured.• LED indications : ⇒ Transmitter On (red LED)

⇒ Limiter On (yellow LED).• Powering : 10.5 ÷ 16 Vdc (negative ground).

CST 50 = 300 mA max.; CST 36 = 700 mA max.• Size - Weight : ⇒ CST 50 = 123 x 49 x 160 mm (n. 1 module) - 650 g approx.

⇒ CST 36 = 123 x 98 x 160 mm (n. 2 modules) - 1.2 kg approx.

NOTE [1]: according to local regulations.

The CST 50 & CST 36 transmitters comply with the following ETSI specifications: ⇒ ETS 300 086:CST 50 & CST 36, versions with 12.5, 20 or 25 KHz channel spacing;⇒ ETS 300 422: CST 50, version with 50 KHz channel spacing (useful on frequencies > 470 MHz).

OPTIONAL ACCESSORIES FOR CST 50 TRANSMITTER: AGN10 - UHF groundplane dismountable antenna (RG213 cable = 10m).AVN10 - UHF vertical-dipole antenna (RG213 cable = 10m).AWN35 - UHF whip antenna, to be mounted directly on the unit.INT37-x - Audio interface module, for connection with a wired intercom system

(execution on request).MTB50 - “Master” board, for the operation in “iso-frequency” mode.

It needs to be factory mounted. SLB50 - “Slave” board, for the operation in “iso-frequency” mode.

It needs to be factory mounted. PSS25 - Mains power supply module.PSS26 - Mains and 12Vdc power supply module.RPT22 - Portable minirack, for 2 modules.RPT23 - Portable minirack, for 3 modules.RPTxx - Portable minirack, custom execution.RST22-S - 19”/3U rack-frame, for max. 8 modules

(CST50, CSR50, PSS25, PSS26, FAS16, INT37-x).UPK100 - Working frequencies user programming kit (interface + software).

INT 37-AAUDIO INTERFACE FOR “PARTY LINE”WIRED-INTERCOM

TECHNICAL SPECIFICATIONS:• Input level from RX : +4 dBu nominal.• Output level to party-line : 0 ÷ -5 dBu, adjustable by means of GAIN control. • Input level from party-line: +4 ÷ -18 dBu.• Output level to TX : +10 ÷ -11 dBu.• Side-tone adjustment : 0 ÷ 15 dB, adjustable by means of the SIDETONE control.• Audio frequency range : 200 Hz ÷ 15 KHz (-3 dB).• Powering : 12 ÷ 30 Vdc, 11 mA max.

FAS 16ACTIVE ANTENNA-SPLITTER MODULE (1-input / 6-outputs)

TECHNICAL SPECIFICATIONS:• Frequency range : UHF (400 ÷ 550 MHz). Other on request. • Switching-window : 10 MHz (±0.5 dB). • Input / output imped. : 50 ohm (SWR = < 1 : 1.5; typ. = 1 : 1.4). • Overall gain : 0 dB (± 1 dB). • IIP3 : +38 dBm (Input 3° Order Intercept Point). • Connectors : input = N-F type; outputs = BNC-F type. • Size - Weight : 123 x 49 x 160 mm (n. 1 module) - 0.5 kg approx.

TECHNICAL SPECIFICATIONS:• Switchable channels : 16, preset in the 400 ÷ 550 MHz range (others on request).• Switching-window : 7 MHz (others on request).• Frequencies : microprocessor controlled frequency synthesizer circuit, with 5

and/or 6.25 KHz minimum step. They are easily user-reprogrammable by PC and optional “UPK32 Programming kit”.

• Channel spacing : 12.5 or 20 or 25 or 50 KHz [1].• Frequency error : < ± 2 ppm, in the rated temperature range.• Temperature range : -10 ÷ +55 °C.• RF input impedance : 50 ohm (type N female connector).• Spurious emissions : < 2 nW (50 pW typ.).• Modulation : FM (Nom. deviation = ±1.7 or ±2.5 or ±3.3 or ±6.5 KHz,

depending on the channel spacing.)• De-emphasis : 75 µS or 750 µS or none (to be compatible with units of other brands).• Sensitivity : < 0.25 µV, for 20 dB SND/N (CCITT measured).• Adjacent channel selectivity : > 73 dB @ 25 KHz channel-spacing • Intermod. rejection : > 73 dB.• Squelch : triple function, with independent and separately adjustable circuits,

with following modes: ⇒ noise-squelch; ⇒ signal-strength-squelch; ⇒ sub-audio-tone squelch (CTCSS type).

• Audio output line : transformer balanced, floating.• Output line level : +4 dBu (1.230 mVrms) nominal (others on request). • Output impedance : 100 ohm.• Diversity-control I/O line : opto-isolated, floating (with the optional DYB50 diversity board).• Noise reduction system : compander circuit, pre-set in “Wisycom-NR” mode or excludable.• AF bandwidth : ⇒ 300 Hz ÷ 2.5 KHz (-3 dB), for 12.5 KHz channel spacing;


• Distortion : < 2 %, CCITT measured (< 1% @ 50 KHz channel spacing).• SND/D ratio : > 80 dB (86 dB typ.), CCITT measured and with NR circuit switched on.• Receiving decoder : CTCSS type (sub-audio tone squelch).• LED indications : ⇒ Receiver On (red Led)

⇒ Noise squelch open (green Led)⇒ CTCSS decoder open (yellow Led)⇒ Active receiver (red Led).

• Powering : 10.5 ÷ 16 Vdc, 100 mA max. (160 mA max. with the DYB50 board), negative ground.

• Size - Weight : 123 x 49 x 160 mm (n.1 module) - approx. 600 g.


The CSR 50 receiver complies with the following ETSI specifications:⇒ ETS 300 086:versions with 12.5, 20 or 25 KHz channel spacing;⇒ ETS 300 422:version with 50 KHz channel spacing. (usable on frequencies > 470 MHz).

OPTIONAL ACCESSORIES FOR CSR 50 RECEIVER: AGN10 - UHF groundplane dismountable antenna (RG213 cable= 10m).AVN10 - UHF vertical-dipole antenna (RG213 cable= 10m).AWN35 - UHF whip antenna, to be mounted directly on the unit.DYB50 - “Remote diversity” board. It must be factory mounted on the receiver.FAS16 - Receiver antenna splitter (1-In / 6-Out).INT37-x - Audio interface module, for connection with a wired intercom system

(execution on request).PSS25 - Mains power supply module.PSS26 - Mains and 12Vdc power supply module.RPT22 - Portable minirack, for 2 modules.RPT23 - Portable minirack, for 3 modules.RPTxx - Portable minirack, custom execution.RST22-S - 19”/3U rack-frame, for max. 8 modules

(CST50, CSR50, PSS25, PSS26, FAS16, INT37-x).UPK100 - Working frequencies user programming kit (interface + software).


UHF RECEIVER MODULE

CST 50CST 50-DCST 36

CSR 50CSR 50-D

UHF TRANSMITTER MODULES

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CRT 16UHF FULL-DUPLEX BELT TRANSCEIVERfor WIRELESS-INTERCOM SYSTEMS

CPR 30TALK-BACK POCKET RECEIVERfor WIRELESS-INTERCOM SYSTEMS

TECHNICAL SPECIFICATIONS:• Switchable channels : 16 RX + 16 TX, in the 400 ÷ 550

MHz range preset (others on request).• Switching-window : ⇒ 5 MHz in the 400 ÷ 470 MHz range

⇒ 7 MHz in the 470 ÷ 550 MHz range (others on request). • Frequencies : microprocessor controlled frequency synthesizer circuit,

with 5 and/or 6.25 KHz minimum step. They can be easily reprogrammed by PC and optional “UPK32 Programming kit”.

• Channel spacing : 12.5 or 20 or 25 or 50 KHz [1].• TX/RX frequency spacing : 10 MHz min. (others on request).• Frequency error : < ± 2 ppm, in the rated temperature range.• Temperature range : -10 ÷ +55 °C.• Antenna : single flexible wire-antenna, connector-interchangeable

(Impedance = 50 ohm).• Operating mode : full-duplex, with one or two PTT (Push To Talk) push-buttons.

The transceiver can operate also in continuoustransmission by a “double click” on one PTT button(this function can be inhibited by internal setting).

• Modulation : FM (Nominal deviation = ±1.7 or ±2.5 or ±3.3 or ±5.5 KHz, depending on the channel spacing).

• Spurious emissions : < 1 nW (50 pW typ.).• NR system : compander circuit on both RX/TX channels,

set in NR-mode (Wisycom-NR).• AF bandwidth : ⇒ 300 Hz ÷ 2.5 KHz (-3 dB), for 12.5 KHz channel spacing;


• SND/D ratio : > -80 dB (-86 dB typ.), CCITT measured(for 25 kHz channel spacing).

• RX sensitivity : < 0.25 µV, for SND/N = 20 dB (CCITT measured), for 25 kHz channel spacing.

• RX selectivity : > 76 dB to the adjacent channel (for 25 kHz channel spacing).• RX intermod. rejection : > 73 dB.• RX audio-output : balanced. Level = 4 Vrms max., with volume control.

Impedance = 10 ohm.• RX squelch : internally adjustable (or excludable).• TX output power : 50 mW, ± 1 dB.• TX audio-input : internally pre-settable (and externally adjustable)

for following microphone types:⇒ dynamic⇒ electret (2-wire or 3-wire type)⇒ active.

• TX coder : CTCSS (sub-audio tone-squelch).• LED indications : ⇒ Apparatus On (green Led is on)

⇒ Low-batter (green Led blinks)⇒ Transmitter On (red [TX #1] or green [TX #2] Led is on)⇒ Modulation peak (blue Led is on)

• Powering : n. 4 size-AA battery elements (alkaline or Ni-Mh rechargeable elements).

• Battery lifetime : ⇒ 15 hours ca., continuous receiving.⇒ 6 hours ca., continuous receiving and transmitting.

• Size (body) / Weight : 143 x 75 x 27 mm / 330 g ca.


The standard version of CRT 16 complies with the following ETSI specifications: ⇒ ETS 300 086:versions with 12.5, 20 or 25 KHz channel spacing;⇒ ETS 300 422:version with 50 KHz channel spacing.

SUPPLIED ACCESSORIES:AWF 30 - UHF flexible antennaBCL 18 - Belt clip (removable)CNS 12 - Wisycom AF connector (for customer’s microphone/headphones-set wiring)

OPTIONALS:CNT 12 - Wisycom AF connector and its mounting

on the customer’s microphone/headphones set.(Optimum factory-presetting of the transceiver included).

UPK 100 - Working frequencies user programming kit (DOS-PC running interface + software)

MCU xx - Microphone/headphones-set, on request (with Wisycom AF connector)CPR 30 - Talk-back UHF pocket receiver,

with 32 frequencies re-programmable PLL sinthesizer.ACM 16 - Ni-MH battery pack (4 AA) charger.

TECHNICAL SPECIFICATIONS:• Switchable channels : 32, preset in the 400 ÷ 530 MHz range (other on request). • Frequency groups : 2, with external selector.• Switching window : 10 MHz (others on request). • Frequencies : microprocessor controlled frequency synthesizer circuit,

with 5 and/or 6.25 KHz minimum step. They can be easily reprogrammed by PC and optional “UPK32 Programming kit”.

• Channel spacing : 12.5 or 20 or 25 or 50 KHz [1].• Frequency error : < ± 2 ppm, in the rated temperature range.• Temperature range : -10 ÷ +55 °C.• Spurious emissions : < 2 nW (50 pW typ.).• Antenna : flexible wire antenna, connector-interchangeable.

(Impedance = 50 ohm).• Modulation : FM (Nominal deviation = ±1.7 or ±2.5 or ±3.3 or ±6.5 KHz,

depending on the channel spacing).• De-emphasis : 75 µS or 750 µS or none.• NR system : compander circuit, pre-set in NR mode (Wisycom-NR) or excludable.• Sensitivity : < 0.5 µV, for SND/N = 20 dB (CCITT measured).• Adjacent chan. selectivity : > 73 dB @ 25 KHz channel spacing

(70 dB @ 12.5 KHz channel spacing).• RX intermod. rejection : > 65 dB.• Audio output : balanced, referred to ground.• AF output level (balanced): 3.4 Vrms max., with volume control. • AF output impedance : 10 ohm.• AF output connector : ⇒ CPR 30-F version = Fischer D102 type, 3-pin female

⇒ CPR 30-J version = 3.5 mm jack plug (can be internally pre-set for mono or stereo earphones).

• AF bandwidth : ⇒ 300 Hz ÷ 2.5 KHz (-3 dB), for 12.5 KHz channel spacing;⇒ 300 Hz ÷ 3.3 KHz (-3 dB), for 20 KHz channel spacing;⇒ 300 Hz ÷ 4.5 KHz (-3 dB), for 25 KHz channel spacing;⇒ 300 Hz ÷ 8 KHz (-3 dB), for 50 KHz channel spacing.

• Distortion : < 2%, CCITT measured (< 1% @ 50 KHz channel spacing).• SND/D ratio : ⇒ > 80 dB (86 dB typ.), with NR-system on

(CCITT measured, @ 25 KHz channel spacing).• Squelch : internally adjustable (or excludable).• TX coder : CTCSS (sub-audio tone-squelch).• LED indications : ⇒ apparatus-on status (green Led is on)

⇒ battery-lifetime < 25% (green Led flashes)⇒ squelch is open (yellow Led is on).

• Battery status indication : by means of 4-step Led bar-graph (battery-lifetime < 100%, 75%, 50%, 25%).

• Powering : ⇒ 2 x I.E.C. LR6 (Size AA - 1.5V - alkaline) battery elements, or⇒ 2 x Ni-MH rechargeable accumulator elements (Size AA – 1.2V).

• Battery life : ⇒ approx. 7.5 hours, continuous working (with alkaline batteries).

• Dimensions - Weight : 57 x 18 x 113 mm - 180 g, including battery and antenna.


The standard version of CPR 30 complies with the following ETSI specifications: ⇒ ETS 300 086:versions with 12.5, 20 or 25 KHz channel spacing;⇒ ETS 300 422:version with 50 KHz channel spacing. (for frequencies > 470 MHz).

SUPPLIED ACCESSORIES:AWF 30 - UHF wire antenna.BCL 20 - Belt clip.

OPTIONALS:LBP 30 - Lithium-Ion battery pack.ACL 30-5 - Battery charger for CPR 30 with LBP 30.

ACL 30-5Battery charger for 5 CPR 30 / MTP 22 with lithium battery pack


audio line(modulation

input)

audio line(modulation &

referenceoutput)

AF input

to otherSlave Units


UNIDIRECTIONAL IEM & TALK-BACK SYSTEMS

Thanks to its fully modular compositions, you can make up severalBase Units configurations. As for the Bidirectional Systems, unidirectional systems can be mountedeither in Portable Minirack (with different widths, depending on the requi-red number of modules) and in standard 19”/1U or 19”/3U rack-frames. The Base Unit can be one single-channel or multi-channel type.The are available two types of Transmitters: in a vertical-shape (3Uheight) and horizontal-shape (1U height).Regarding the output power of the Transmitters, we are used to offerunits with an output power that can be factory pre-set in a valuebetween 10 mW (to comply the ETSI norms related to free-use BaseUnits in UHF TV frequency range, it is a more than suitable power tocover a big TV studio) and 300 mW (that allows a great operatingdistance up to more than one mile). 2W Transmitter Module (in a ver-tical shape) is available for even longer distances.The working frequencies can be set in a 7 MHz switching-windowbetween 400 ÷ 550 MHz.The Transmitter Module is endowed with a balanced and ground-isola-ted audio line input, with a very great input-level adjustment capabi-lity, to allow the easiest connection with all type of audio sources.

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CTK 50-Master(with antennas)

CTK 50-Slave #1(with antennas)



CTK 50Composed by:n.1 - CST 50, transmitter module (300 mW max.)n.1 - PSS 25, mains power-supply modulen.1 - RPT 22, portable minirackn.1 - antenna (various types)

EXAMPLES OF UNIDIRECTIONAL BASE UNITS

CTK 503 (multichannel customized version)

Composed by:n.3 max - places for different units

(transmitters or receivers)n.1 - RST 503, 19”/1U rack-frame

with built-in mains power-supply n.3 max - antennas (various types)

CFK 350-C (multichannel customized version)

Composed by:n.7 max - places for different units (transmitters,

receivers, RF-splitter, audio interface) n.1 - PSS 25, mains power-supply modulen.1 - RST 22-S, 19”/3U rack-frame n.3 max - antennas (various types)

CTK 50-D Composed by:n.1 - CST 50-D, desktop transmitter (300 mW max.)n.1 - PSP 910, mains power-supplyn.1 - antenna (various types)

CTK 36 Composed by:n.1 - CST 36, transmitter module

(2 W max, 2-module wide)n.1 - PSS 26, mains power-supply modulen.1 - RPT 33, portable minirackn.1 - antenna (various types)

EXAMPLE OF ONE UNIDIRECTIONALCOMMUNICATION SYSTEM with several Base-Units in “master/slave” configuration(see description on page 6)


WISYCOM wireless-communication systems for the DVB-T scenario

• Both RX and TX links use the sameUHF band (400 ÷ 550 MHz), grantingthe maximum frequency’s saving andthe best integration with other wireless-systems.

• All units present 16 RX and/or 16 TXswitchable frequencies.

• Narrow-band or medium-band operation assures the maximum flexibility of use and frequency’s saving.

• Suitable for very complex multi-channelsystems, thanks to the extremely highRX-intermodulation-immunity and RF/IFselectivity and TX-signal-clearness.

• Superb audio quality and exceptionallow-noise operations.

• The Base Unit’s transmitter and receivermodules are endowed with audio connections lines, which are balanced and isolated by transformer. This assures the best and easiest connection with any kind of AF-sources,AF-loads and wired intercom systems.

• The automatic limiter on transmitter’sinput prevents any overload.

• The working-frequencies can be easyreprogrammed by PC.

• Fully modular architecture allows the simplest building and even furtherimproves of any kind of wireless-intercomsystem.


• Very great working-areas can beeasily covered by the connection of more Base-units together, in“master/slave” architecture, with synchronized frequencies and diversity reception.

WISYCOM systems modular architecture

Wisycom wireless-intercom systemsarchitecture is fully-modular. It is possibleand simple to build working systems indifferent ways, depending on user’srequirements. The systems can be“custom” configured according to theseveral needs of the operators.Here are some main examples:A) All belt-pack transceivers receivethe same audio-signal from the base-station and transmit, one at the time byPTT push-button, to the base. Whilespeaking, the transceiver operates infull-duplex mode (it listens to andspeaks at the same time).Double-click pushing on on the PTT push-button, the transceiver starts to operate in continuous transmitting (and receivingat the same time) till the push-button ispressed again.

The base-station is composed by the following RF units:• transmitters = n. 1• receivers = n. 1Required frequencies (on base-station):• transmitting = n. 1• receiving = n. 1B) All belt-pack transceivers receive thesame audio-signal from the base-stationand can transmit at the same time (infull-duplex mode) to the base.The base-station is composed by the following RF units:• transmitters = n. 1• receivers = n. 1,

for each belt-pack transceiver used.Required channels (on base-station):• transmitting = n. 1• receiving = n. 1,

for each belt-pack transceiver used.

C) Each belt-pack transceiver receives aseparate audio-signal from the base-station and can transmit at the sametime to the base.The base-station is composed by the following RF units:• transmitters = n. 1,

for each belt-pack transceiver used• receivers = n. 1,

for each belt-pack transceiver used.Required channels (on base-station):• transmitting = n. 1,

for each belt-pack transceiver used• receiving = n. 1,

for each belt-pack transceiver used.

WISYCOM Base-Unit in “master/slave” configuration

In some cases the coverage of the “standard” base-station is not enough.Therefore Wisycom has developed, and tested for a long time, a specialtechnology to overcome this problem.Wisycom offers the possibility to connecttogether several Base-Units (in“master/slave” configuration) to increa-se the coverage area almost unlimited.In fact the resulted total coverage area

is the sum of the single area of eachBase-Unit.In order to grant excellent working conditions immune from interferences,Wisycom supplies special add-onboards, to upgrade its transmitter- and receiver-modules to allow the“master/slave” operations. So all tran-smitters can work in “iso-frequency”mode and all receivers work in “remote

diversity” mode.The “master” and “slave” Base-Units canbe installed far away one from the otherand they need to be connected togetherby wire. Wisycom technology allows theutilisation of simple balanced audio linesor cheap telephone twisted-pairs (evenpre-existing) instead of expensive dedicated coax or optical-fibres cables.


WISYCOM srl • Via Spin, 156 • I-36060 Romano d’Ezzelino • ItalyTel. +39-0424-382605 • Fax +39-0424-382733 www.wisycom.com • e-mail: [email protected]

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Thanks to Wisycom 25 years old expe-rience in the field, the systems aredesigned with the aim of granting notonly the actual maximum operatingquality of the products, but also their

maximum durability in time. This resultis reached with carefully sophisticatedtechnical solutions such as modularityand the inter-changeability of thevarious modules.

The best solution for system-engineersare easily guaranteed by the combina-tion of flexibility and modularity withthe highest quality standards.

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