Figure 6. Typical Softpot Screen - Motorola XTS 2500 Basic Service Manual

Radio Alignment Procedures
20
The alignment screens introduce the concept of the "softpot," an analog SOFTware-
controlled POTentiometer used for adjusting all transceiver alignment controls.
Do NOT switch radios in the middle of any Alignment procedure.
! Always left-click the Close button on the screen to return to the MAIN
menu screen before disconnecting the radio. Improper exits from the
Alignment screens may leave the radio in an improperly configured
C a u t i o n
state and result in seriously degraded radio or system performance.
Each alignment screen provides the ability to increase or decrease the softpot value by
using a slider or the screen's UP/DOWN arrow keys (
from the keyboard. A graphical scale on the display indicates the minimum, maximum, and
proposed value of the softpot; see Figure 6.
Adjusting the softpot value sends information to the radio to increase (or decrease) a
voltage in the corresponding circuit. For example, left-clicking the UP arrow
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 procedures in the sequence indicated.
NOTE: Some of the following screens may vary depending upon the radio under
test and the version of tuner software you are using. Refer to the
software's on-line help.

Figure 6. Typical Softpot Screen

), or by entering the new value
on the