5 Select “Modulation Limit” under the Tx menu in the tree view (See Figure 47: Tx Menu tree
(Tuning Procedure with no Tx data) on page 90).
Figure 47: Tx Menu tree (Tuning Procedure with no Tx data)
6 Enter the tuning frequency into the Communication Analyzer (the value displayed on the Tuner
GUI).
7 Click the “PTT Toggle” button within the Tuner environment to key up the repeater.
8
Adjust the softpot value until the maximum deviation is 92% of the rated system deviation
(RSD). This will be tested in a 12.5 kHz channel spacing, so 92% of 2.5 kHz is 2.3 kHz.
NOTICE: Set the modulation limit to 92% so that any additional deviation incurred by the
transmitter VCOs over temperature is compensated for.
Channel Spacing (kHz) RSD (kHz) 92% of RSD (kHz) Tolerance (Hz)
12.5 2.5 2.3 +0/ -50
9 Click the “PTT Toggle” button within the Tuner environment to de-key the repeater.
10 Click “Write” to save the new tuned softpot value into the repeater’s codeplug.
10.7.2
Verification (with no Tx Data and no PL)
Procedure:
1 Connect the repeater's antenna port to the attenuation pad, if necessary, before connecting to
the Communication Analyzer.
2 Power the repeater from either an AC or DC source.
3 By using CPS, program the repeater with any frequency within the specified range of the
repeater under test, and set the repeater for low power and disable the repeat path.
4 Apply a 1 kHz signal at 1.2 Vrms to Pin 1 of the J7 backplane connector.
• Signal ground is Pin 9 of the J7 backplane connector.
5
Key up the repeater and measure the deviation
•
Key the repeater by grounding Pin 2 of the J7 backplane connector.
NOTICE: CPS must have Pin 2 configured as an active low with the PTT function.
6
De-key the repeater.
Chapter 10: SLR 5000 Series Programming and Tuning
Motorola Solutions Confidential
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