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The SPACE and the MARK frequencies are measured during the initial part of the DSC call.
The measurements are done by means of a time measurement on an AF signal (1700 Hz +/- 85
Hz) derived from the MF/HF MARK/SPACE signal.
The time measurements for MARK and SPACE respectively are converted to frequency and the
calculated values are added to an offset frequency for the actual MF/HF frequency. By adding
the offset frequency to the measured/calculated frequencies the actual MF/HF MARK/SPACE
frequencies are obtained.
The AF signal used for calculation of the MARK/SPACE frequencies must be within 1615 +/-15
Hz and 1785 +/-15 Hz respectively to be accepted.
Simultaneous MF/HF power test
When the MH/HF Power Sensor (optional accessory) is connected between the transmitter
output terminal and the antenna tuner Futronic MKll will display the PEP power and VSWR. The
test results are stored in the test box memory along with the DSC data.
Example of Printout from the Memory:
MF/HF # 1 Time/date: 08:58:01 / 04-12-2019
DSC DATA: 2187.5 kHz
RX MMSI: 9999999990 Format 120 Category: 100 TX MMSI: 2190155210
1.telecommand: 109 2.telecommand: 126 Info.: 02 26 50 02 26 50
EOS: 117 ECC: 94 Status: OK
Mark: 2187428 Hz Space: 2187592 Hz Fwd: 264 Watt PEP Rev: 1 Watt PEP VSWR: 1.1
ANT.
MF/HF DSC TRANSMITTER
ATU
Summary of Contents for Futronic MKII
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