User Manual

SGD-SB2025NT-TUM, Part 1
Jan 12 Page 19 INSTALLATION & OPERATION
3.2.3 Adjustments
There are two categories of adjustable parameters in the SB2025:
• those that are controlled by conventional potentiometers, which may be manually adjusted;
and
• those controlled by digital potentiometers, which are under the control of the Micro Controller.
The latter category of items comprises Tx power, Tx Voltage Controlled Oscillator (VCO) deviation,
Tx reference oscillator deviation and Tx reference oscillator frequency. All of these are adjusted
with the aid of the MxTools programming utility, and all except Tx power should only be adjusted
as a part of a full Tx VF path alignment procedure.
Following adjustment of a digipot controlled parameter, the value must then be saved to the radio
to make the change permanent.
Refer to Section 6 – Alignment and Testing for details.