SmarTrunk Systems ST-9116C, Service Manual, Page: 30 / 67

ST-9116C SM R 1.1 SMARTRUNK SYSTEMS, INC. 30
5.7. RECEIVER ALIGNMENT
Setup the test equipment as shown
for Receiver alignment, apply 13.8
V DC power to the transceiver.
The RF frequency must be loaded
on Receiver Frequency of the
alignment software to facilitate the
alignment within all repeater band
avoiding special programming of
the repeater before start alignment
procedure.
7.5V Power Supply
PC compatible
RF signal generator
Figure 33: Receiver Alignment Setup
5.7.1. ANALOG DISCRIMINATOR GAIN
This is a critical parameter, which
may not be realigned to different
values other than factory default.
Under your risk, if you still prefer to
realign the overall modulation gain,
you must select
Disc. Gain Analog
on Alignment screen.
Figure 34: Analog Discriminator Gain Alignment Screen
Actual alignment value will be
displayed on alignment slider.
Press [Start] then move the slider to
reach the desired value.
As soon the desired value is
reached, press [Finish] to store the
value on repeater memory.
If you want to retrieve factory
default, press [Factory] instead of
[Start]. You will be asked to confirm
the factory default alignment, and
then if you confirm it, original
values from factory will be loaded
into current alignment settings.
5.7.2. FDMA DISCRIMINATOR GAIN
This is a critical parameter, which
may not be realigned to different
values other than factory default.
Under your risk, if you still prefer to
realign the overall modulation gain,
you must select
Disc. Gain FDMA
on Alignment screen.
13.8Vdc Power Supply