EME with digital modes 144 MHz • SM4GGC Stig Larsson

• Ham radio licensed since 1973

• Active on VHF/UHF 1973-1983 and from 2012-

• EME 1979-1983 and from 2012-

Agenda

• Modes for digital EME • WSJT 10 “Weak Signal Joe Taylor” (K1JT) • WSJT-X “Weak Signal Joe Taylor” (K1JT) • MSHV (LZ2HV) • MAP65 Broad band receiving software (K1JT) • EME setup • Antennas for EME • EME tools • Result and possibilities

JT65

● Modulation mode created by Joe Taylor – K1JT in 2003

● DSP techniques optimized for extremely weak but slowly varying

signals (moon bounce) and narrow bandwidth

● Uses 65-frequency shift keying with a sync tone and low data rates (2,69

baud)

● Can use ”Deep Search table” = Call3 file (list of stations known to do EME)

for error correction

● Decode signals many decibels below the noise floor about -24 dB without

Deep Search and with Deep Search about -28 dB

JT65 QSO

● Fixed and Expected Message, Grid and Callsign Formats

● CQ SM4GGC JO69

● SM4GGC KD7UO CN87

● KD7UO SM4GGC OOO

● RO “Short hand message” for RO, RRR and 73 (two tones)

● RRR

● 73

JT65B message bandwidth 355 Hz

Sync tone Message information

RO 73 Short hand message

QRA64

● Modulation mode created by IV3NVV Nico Palermo 2016

● Q-ary(63,12) repeat-accumulate code. Operationally similar to JT65 but there are no sync tone and no two-tone short hand message.

● NO ”Deep Search table” = Call3 file (list of stations known to do EME) for error correction. Only using a priori information

● Better than JT65. Decodes full 72-bit message about -28 dB and Locator or report at -30 dB

QRA64 QSO

● Fixed and Expected Message, Grid and Callsign Formats

● CQ SM4GGC JO69

● SM4GGC W2HRO FN20

● W2HRO SM4GGC -23

● SM4GGC W2HRO R-27

● W2HRO SM4GGC RRR

● HNY 73 GL

QRA64 message bandwidth 111 Hz Red curve indicates that the decoder has achieved synchronization and the beginning of a message

Message information

WSJT 10

JT65A EME 6M BW = 178 Hz JT65B EME 2M BW = 355 Hz JT65C EME 70/23cm BW = 711Hz JT65B2 EME 2M contest mode 30 sek JT65C2 EME 70/23 contest mode 30 sek

Call3 file with know EME hams (Deep Search) FSK441 Meteor Scatter on 2M ISCAT-A/B Meteor/Inon Scatter on 6 M JT4A - G EME/tropo microwave JTMS new mode for Meteor Scatter (MSK) Medium Shift Keying

DT= The signal’s time offset in seconds relative to your computer clock. (For a EME- trace around 2,5 sec) Average decode of several trace

Sync tone detected Confidence level 0-10 on Deep Search

Get started with WSJT 10 Interface from Radio to PC • Mic, AF-out and Comport PC to TX Key Sync your computer clock • Automatically sync computer time with Dimension 4 http://www.thinkman.com/dimension4/ Settings on the tranciver • USB mode on • Broadest Filter Width (5KHz) • Noise blanker can be active • AGC off • Modulate TX until you se a some ALC level on transceiver ( Ok for slow modes in EME like JT65 and QRA64)

Movie time JT65B QSO in WSJT 10 http://sm4ggc.se/WSJT10_EB5EEO.mp4

WSJT-X 1.7

New Decoder for JT65 Frankie- Taylor New mode for EME QRA64 Automatic EME Doppler tracking useful on higher fq Enhanced Echo mode

Improvement for EME compared to WSJT 10

WSJT-X Echo mode

Movie time QRA64A QSO in WSJT-X http://sm4ggc.se/QRA64_S52LM.mp4

MSHV By LZ2HV

Uses the free codec's software from K1JT No support for Deep search Only JT65 for EME so far Fast development New version is coming every month

MAP65 Broad band receiver software for EME K1JT

Can be use with a SDR-radio single channel or dual channel with common local oscillator for Adaptive Polarization

Installing MAP65 and the FUNcube Pro+ http://kb5wia.blogspot.se/

Low cost alternative for single channel solution FunCube Dongle Pro+ or other SDR-Dongle

Movie time JT65B QSO in MAP65 http://sm4ggc.se/MAP65_RX8XR.mp4

SM4GGC EME setup

1 st MAP65 V or H pol

WSJT-X or WSJT 10 V or H Pol

2 nd MAP 65 RX V or H Pol

Possible to shift RX-pol independent of TX-pol Switching TX-pol

SM4GGC EME setup

Antennas 4x14 el DK7ZB X-yagi H and V pol Antenna rotator AlfaSpid RAS Antenna tracking PST Rotator TS-2000 for RX WSJT and TX 2 x Fun Cube Dongle pro+ for RX MAP65 1 PC with MAP65 and WSJT and supporting program 1 PC with MAP65 only

2 X FunCube Dongle Pro+ for MAP65 setup

SM4GGC EME setup with supporting program

Antennas for EME 144 MHz

• 1 Yagi possible to QSO 4 Yagi station

• 2 Yagi possible to QSO other 2 Yagi station

• Good solution 4 yagi • Big advantage to use X-yagi

• Optimal is to use Adaptive polarization in RX

JF4TGO with M2 2 X 2MXP20

DL4KUG 4x9 el LFA Yagi

OK1IL 4x9el DK7ZB

KB5WIA 2x7el V-pol

DD0VF 2X9 el Rotatable polarity

OX3LX Greenland

SM4GGC 4x14 el DK7ZB X-yagi H and V pol

http://www.livecq.eu/ EME tools

EME tools

N0UK chat for EME http://www.chris.org/cgi-bin/jt65emeA N0UK Chat client from PE1L

Result and possibilities

• EME since 2012- over 1 600 QSO

• Different call signs total 678

• Stations QRV on 144 MHz EME could be more than 1000

• So what are you waiting for?

SM4GGC Thanks for me