User's Manual

ST-3118D SM R 1.1 SMARTRUNK SYSTEMS, INC.
15
Setup the test equipment as shown
for transceiver alignment, apply
13.8V DC power to the transceiver.
The RF parameters are typed on the
alignment software to facilitate the
alignment within all radio band
avoiding special programming of
the radio before start alignment
procedure.
All parameters can be aligned
without relationship to any other,
so there is no an order to align. On
this way, you can adjust only the
desired parameter, avoiding to
waste time realigning other
parameters than required.
Before proceed to align any
parameter, a desired frequency
must be loaded into both TX and
RX. Evenly when the radio has
stable characteristics for all
bandwidth, it is recommendable to
align on middle of the radio-
working band.
5.6.1. Main Clock alignment:
To align the main clock for radio Tx
and RX, please select:
Main Clock Adjust
option Alignment screen.
Figure 10: Main Clock Alignment
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 Frequency Counter
to reach the desired frequency as
shown on Frequency field of the
alignment screen.
As soon the desired value is
reached, press [Finish] to store the
value on radio memory.
Typical default alignment
correspond to a max error of 60Hz
on the alignment clock in factory
when the radio was calibrated.
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.
This confirmation screen will
appears any time you want to
realign any parameter to Factory
Default.
5.6.2. Transmit Power alignment:
ST-3118 has three power levels to
be selected for each channel. High,
medium and low power level can be
aligned as per radio usage
requirement.
Figure 11: Default Alignment Values Retrieve