The deviation shall meet the limits shown in the table below.
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
NOTICE:
• The repeater will be factory-tuned in accordance to the above procedure and
specification.
• Verification is performed outside of the Tuner application, i.e. in normal mode.
10.7.3
Tuning Procedure (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 Click the “Read” button on the Tuner application to read the repeater’s softpot values.
4 Select “Modulation Limit” under the Tx menu in the tree view.
5 Enter the tuning frequency into the Communication Analyzer (the value displayed by the Tuner
application).
6 Click the “PTT Toggle” button within the Tuner environment to key up the repeater.
7 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.
8 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”.
E.g. 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
9 Click the “PTT Toggle” button within the Tuner environment to de-key the repeater.
10 Click “Write” to save the newly tuned softpot value into the repeater’s codeplug.
Chapter 10: SLR 5000 Series Programming and Tuning
Motorola Solutions Confidential
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