Salcom 12-38-0000, Product Manual, Page: 7 / 13

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12-38-0000 VHF AND UHF TRANSCEIVER Product Manual
Sea Air and Land Communications Ltd, 10 Vanadium Place, Addington, Christchurch 8024, New Zealand February 2019
Analogue Transmissions Via External Modulation Source
Connect the External Modulation Source to Pin 3 of connector S10. This input is configured for a
fixed amplitude input source of 100mV rms, or 280mV p-p. Monitor the RF output on a FM
modulation on a meter and adjust the deviation to ±4kHz. Adjust the deviation by fine adjustment
of the input signal, or via the PSD by changing the DAC setting within the ‘
Audio in Atten ’ box.
Do not click ‘ Enable Calibration ’ tick box for this adjustment. It is important to ‘ Read ’ first, then
alter the settings, a higher number gives more deviation and lower number less deviation.
It is also important to keep the deviation to ±4kHz to avoid getting into the compression range.
Then press ‘
Program ’ in the ‘ Configuration ’ section to save the settings.