User's Manual

Figure 24: Auxiliary Connector
14
25
1
13
NOTICE: Optimally, it is recommended to load pin #7 with application loading used
during normal operation of the repeater.
7 To save the new tuned softpot value into the repeater’s codeplug, click Write.
8.6
Tx Audio Level Set
The procedure outlined in this section is used to allow adjustment of the transmitter audio level the
repeater is expecting at its Aux connector. Adjusting this level set has the effect of increasing or
decreasing RF signal deviation for a given transmit audio level. Perform this procedure any time the
transmitter audio level needs adjustment.
8.6.1
Tuning the Tx Audio Level Set
Procedure:
1 Connect the repeater’s transmitter antenna port to the Communication Analyzer.
2 Power the repeater from a DC source.
3 Apply a 1 kHz signal at the desired input level to pin #1 (in reference to ground) on the Aux
connector. The group connection provided by the Aux connector is pin-4. See Figure 24:
Auxiliary Connector
on page 68
NOTICE: Optimally, it is recommended to load pin #1 with the application source
impedance used during normal operation of the repeater.
4 Launch the Tuner application and click Read to read the softpot values.
5 Under the TX
menu in the tree view, select Tx Audio Level. (SeeFigure 25: Tx Menu Tree (Tx
Rated Volume) on page 68 ).
Figure 25: Tx Menu Tree (Tx Rated Volume)
6 Enter the tuning frequency into the Communication Analyzer (the value displayed on the Tuner
GUI under the heading of Frequency Points.
7 Click PTT Toggle to key up the repeater.
8 Adjust the softpot value until the desired receive audio level is achieved at pin #7 (in reference to
ground) on the Aux connector. The ground connection provided by the Aux connector is pin 4.
NOTICE: The Tuner aligns this parameter in a 12.5 kHz channel spacing, so 60% is 1.5
kHz of deviation. If Radio Management (RM) is set for 25 kHz operation, the repeater
automatically scales the deviation by a factor of two when it is outside the Tuner
application.
9 Click PTT Toggle
to de-key the repeater.
10 To save the new tuned softpot value into the repeater’s codeplug, click Write.
MN003557A01-AA
Chapter
8: SLR 1000 Programming and Tuning
68 Send Feedback
Preliminary FCC Filing