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TYPICAL TEST PROCEDURES
3.02.04 Opening Receiver Squelch Using DCS
Opening a receivers DCS encoded squelch can be achieved by using the following procedure.
The COM3010 supports all the commonly used codes, both non-inverted (N) and inverted (I).
1. Connect a test cable between the COM3010’s RF OUT jack and the receiver under test’s
antenna jack.
2. Set the RF Level equal to the receiver’s sensitivity: see receiver owner’s manual.
Example: 0.25 uV.
3. Set the COM3010’s GENERATE Frequency to the frequency of the receiver under test.
Example: 464.55 MHz.
4. Press to select the DCS Mode.
5. FM Modulation is automatically selected
6. The default deviation is 500 Hz. The deviation can be changed by pressing FM and
entering a new one value. Example: 250 Hz. Press
7. The Code field is automatically selected unless deviation was changed in the previous
step. To return to the Code field press
8. To select the required code use the arrows to scroll through the list of
available codes.
9. To select inverted codes use SHIFT, DCS then use the UP, DOWN arrows to scroll
through the list of codes.
10. To return to Normal DCS codes press the SHIFT, DCS keys again.
11. If the DCS code is unknown scroll through the list of codes until the squelch opens.
If internal or external modulation is desired with the CTS tone, Press either INT or EXT. Set up
the modulation information as described in “2.06 Modulating the Carrier”.
Property of Ramsey Electronics, Inc.
Do not reproduce or distribute.
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