Softpot; Figure 6-2. Rss Service Menu Layout; Figure 6-3. Softpot Concept - Motorola ASTRO SPECTRA Service Manual

6-2
All SERVICE screens read and program the radio codeplug directly; you do NOT have to use the
RSS GET/SAVE functions to use the SERVICE menus.
6.2.2

Softpot

The SERVICE screens introduce the concept of the softpot, an analog SOFTware-controlled
POTentiometer used for adjusting all transceiver alignment controls.
Each SERVICE screen provides the capability to increase or decrease the softpot value with the
keyboard UP/DOWN arrow keys respectively. A graphical scale is displayed indicating the minimum,
maximum, and proposed value of the softpot, as shown in
Adjusting the softpot value sends information to the radio to increase (or decrease) dc voltage in the
corresponding circuit. For example, pressing the UP arrow key at the Reference Oscillator screen
instructs the radio's microcomputer to increase the voltage across a varactor in the reference
oscillator, which increases the frequency.
In ALL cases, the softpot value is just a relative number corresponding to a digital-to-analog (D/A)
generated voltage in the radio.
Perform the following alignment procedures in the sequence indicated.
NOTE: Some of the following screens may vary depending upon the radio under test and the version
of radio service software you are using. Refer to your radio service software user's guide.
February 3, 2003
SERVICE
F2 -
TRANSMITTER ALIGNMENT MENU
F1 -
HELP
F2 -
REFERENCE OSCILLATOR ALIGNMENT
F3 -
TRANSMIT POWER ALIGNMENT
F4 -
TRANSMIT CURRENT LIMIT
F5 -
TRANSMIT DEVIATION BALANCE
(COMPENSATION) ALIGNMENT
F6 -
TRANSMIT DEVIATION LIMIT ALIGNMENT
F10 -
EXIT, RETURN TO SERVICE MENU

Figure 6-2. RSS Service Menu Layout

0
Min.
Value

Figure 6-3. Softpot Concept

Radio Alignment Procedure: RSS
Figure 6-3 .
15
Max.
Value
6881076C20-E