Motorola MCS 2000 Service Instructions Manual page 81

Radio Tuning Procedure: Tuning Procedure
7. Press F8 to program the softpot value; press F10 twice to return to the SERVICE menu.
DTMF Transmit Deviation (GVN6011 only)
NOTE: This tuning sequence is ONLY for radios with Conventional Select 5 Signaling software being
tuned with the RSS GVN6011.
The DTMF Deviation Softpot is used to tune the FFSK signaling deviation. Tuning is performed at
one frequency and for 25 kHz channel spacing. The radio generates a DTMF signal for tuning.
Values for other frequencies and channel spacings are calculated by the radio software.
1. From the RADIO TUNE menu, press F4 to select SIGNALING alignment.
2. Press F4 again to select the DTMF softpot.
3. Press F6 to key the radio on the test frequency. The screen will indicate that the radio is
transmitting.
4. Measure the DTMF deviation on your service monitor.
5. Use the UP/DOWN arrow keys to adjust the DTMF deviation to be within 3.05 and 3.45 kHz.
6. Press F6 again to dekey the radio.
7. Press F8 to program the softpot value; press F10 to return to the SIGNALING menu.
Select 5 Transmit Deviation (GVN6011 only)
NOTE: This tuning sequence is ONLY for radios with Conventional Select 5 Signaling software being
tuned with the RSS GVN6011.
The Select 5 Deviation Softpot is used to tune the FFSK signaling deviation. Tuning is performed at
one frequency and for 25 kHz channel spacing. The radio generates a Select 5 signal for tuning.
Values for other frequencies and channel spacings are calculated by the radio software.
NOTE: Alignment of the Transmit Deviation Limit Reference MUST immediately PRECEDE the
Select 5 Alignment Procedure.
1. From the RADIO TUNE menu, press F4 to select SIGNALING alignment.
2. Press F5 again to select the Select 5 softpot.
3. Press F6 to key the radio on the test frequency. The screen will indicate that the radio is
transmitting.
4. Measure the Select 5 deviation on your service monitor.
5. Use the UP/DOWN arrow keys to adjust the Selectþ5 deviation to be between 3.30 and
3.70 kHz.
6. Press F6 again to dekey the radio.
7. Press F8 to program the softpot value; press F10 twice to return to the SERVICE menu.
Squelch
The squelch softpots set the signal to noise ratio at which the squelch opens. The 25/30 kHz squelch
value needs to be set at 7 frequencies across the frequency range. In 800 MHz and 900 MHz radios
the 6th and 7th frequency are always the same, so only 6 frequencies are being tuned. For some
models, the 20 kHz and 12.5 kHz values are then set at one frequency and the other frequency
settings are calculated by the radio software. For other models the 20 kHz and 12.5 kHz squelch
settings are also tuned for all 7 frequencies across the band.
1. From the SERVICE menu, press F3 to select RECEIVER alignment.
68P81083C20-D
6-9
December 6, 2004