User's Manual

Figure 47: TX Menu Tree (Tuning Procedure with No Tx Data)
7 Enter the tuning frequency into the Communication Analyzer (the value displayed on the Tuner
application).
8 To key up the repeater, click PTT Toggle.
9 Adjust the softpot value until the maximum deviation is 92% of the rated system deviation
(RSD). This is tested in a 12.5 kHz channel spacing, so 92% of 2.5 kHz is 2.3 kHz.
10 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
11 To de-key the repeater, click PTT Toggle
12 To save the new tuned softpot value into the repeater's codeplug, click Write.
10.7.2
Verifiying the Modulation Limit (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 In 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 Aux connector.
• Signal ground is Pin 9 of the Aux connector.
5 Key up the repeater and measure the deviation
• Key the repeater by grounding Pin 2 of the Aux connector.
NOTICE: CPS must have Pin 2 configured as an active low with the PTT function.
6 De-key the repeater.
The deviation shall meet the limits shown in the following table.
Channel Spacing
(kHz)
Relative Standard Deviation (RSD)
(kHz)
92% of RS
(kHz)
Tolerance
(Hz)
12.5 2.5 2.3 +0/-50
20.0 4.0 3.68 +0/-80
25.0 5.0 4.6 +0/-100
MN001436A01-AD
Chapter 10: SLR 5000 Series Programming and Tuning
94 Send Feedback