Motorola ASTRO SPECTRA Service Manual

February 3, 2003 6881076C20-E
6-12 Radio Alignment Procedure: ASTRO Digital Spectra and Digital Spectra Plus Tuner Software
Figure 6-10. Tuner Menu Layout
The alignment screens introduce the concept of the “softpot,” an analog SOFTware-controlled
POTentiometer used for adjusting all transceiver alignment controls.
Each alignment screen provides the ability to increase or decrease the softpot value by using the
slider or the screen’s spin buttons (
▲ and ▼), 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 6-11.
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 state and result in
seriously degraded radio or system performance.
!
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Motorola ASTRO SPECTRA Specifications

General

Frequency Range	136-174 MHz, 403-470 MHz
Number of Channels	Up to 255
Channel Spacing	12.5 kHz, 20 kHz, 25 kHz
Modulation	FM
Operating Temperature	-22°F to +140°F (-30°C to +60°C)