Radio Alignment Procedures
23
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 (
), or by
entering the new value 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
on
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 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
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