User's Manual

NOTICE:
• The repeater is factory-tuned in accordance to this procedure and specification.
• Verification is performed outside of the Tuner application, such as in normal mode.
10.7.3
Tuning the Modulation Limit (with Tx Data or PL)
Procedure:
1 Connect the repeater's antenna port to the attenuation pad, if necessary, before connecting to
the Communication Analyzer.
2 Turn on the repeater using an AC or DC source.
3 Launch the Tuner application.
4 To read the softpot values, click Read
5 Under the TX menu in the tree view, select Modulation Limit.
6 Enter the tuning frequency into the Communication Analyzer (the value displayed by the Tuner
application).
7 To key up the repeater, click PTT Toggle.
8 Apply a 1 kHz signal at 1.2Vrms to Pin 22 of the J7 backplane connector.
• Signal ground is Pin 9 of the J7 backplane connector.
• If the manufacturer of the third party controller specifies that the Tx Audio is not to be
pre-emphasized, use Pin 1 instead of Pin 22.
9 Adjust the Modulation Limit softpot to a value that limits the maximum deviation to "X"% RSD,
where "X" is equal to "92% RSD" minus "Tx Data's % RSD".
If Tx Data deviation is equal to 17%,
X = 92% - 17% = 75% as the maximum deviation limit.
Figure 48: Example of Maximum Deviation Limit Calculation
Buffer
Data or PL
Voice
8%
17%
75%
92%
0%
100%
%RSD
With Tx Data or PL
10 To de-key the repeater, click PTT Toggle .
11 To save the newly tuned softpot value into the codeplug, click Write.
12 Alignment is complete.
MN001436A01-AD
Chapter 10: SLR 5000 Series Programming and Tuning
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