User's Manual

ST-3118D SM R 1.1 SMARTRUNK SYSTEMS, INC.
23
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 radio band
avoiding special programming of
the radio before start alignment
procedure.
7.5V Power Supply
PC compatible
RF signal generator
Figure 24: Receiver Alignment Setup
5.7.1. 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
Discriminator Gain
on Alignment screen.
Figure 25: Discriminator Gain Alignment Screen
Actual alignment value will be
displayed on alignment slider.
Press [Start] then move the slider to
reach the desired value at the time
you checks the deviation meter to
reach the desired signaling level for
narrow band operation.
As soon the desired value is
reached, press [Finish] to store the
value on radio 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.
13.8Vdc Power Supply