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Select Test Sensitivity and press OK. CH 06 will appear as the default channel in the display.
Other channels can be selected by pressing ↑ or ↓.
At the desired frequency, press OK and the test box will keep sending the modulated signal.
To stop the transmission, press EXIT.
For reference, the test box RF output level is approx. -45 +/- 2 dBm. In order to match with the
sensitivity of a ship's radio (approx. -115 dBm), the attenuator to be used should be approx
-70 dB.
To simply check if the 1 kHz-modulated signal is well received over the air, use this setup:
VHF RECEIVER
ANT.
MF/HF Radios
Set Number
As you may wish to test several radios under the same MMSI, each radio can be given its own
individual set number for recognition. Default number is 1. Press OK to confirm, or press ↑ or ↓
to change to another number. Then, press OK and go to the test you wish to perform.
Receive DSC
In the Receive DSC test mode, the test box will receive the radio's MMSI number and DSC data
transmitted, and at the same time measure the frequency of the transmission.
Connect the wire antenna supplied with the test box and use the setup below. The test box
antenna should be able to "see" the transmitter's antenna.
DSC TRANSMITTER
ANT.
Select Receive DSC and press OK. Then select whether the test box is going to receive the call
on one of the TFC channels or MF/HF distress channels. Press OK and select frequency.
Finally, press OK again and activate the transmitter.
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