Service manual

Guide to ASTRO™ Digital Radios
R09.50.00-R11.06.02 cont…
mode, with 12.5 KHz and 25 KHz channels mixed in
scan list, and receiving weak signals. SRN1354
R09.60.04
Highest firmware version that installs on 512K
ASTRO Digital Spectra™ vocons.
R11.01.01
R11.01.01 – R11.07.00
Transmit Audio Gain Control (AGC) is introduced.
This is the most significant enhancement to digital
audio on ASTRO digital systems ever implemented.
SRN1370 (April 2002)
ASTRO Digital Spectra™ trunked priority talkgroup
scan problem. (missed calls) SRN1330.Support for
Soft-ID decode in ASTRO Digital Spectra™.
ASTRO Digital Spectra™ equipped with DVP-XL
may experience missed words. SRN1368
R11.08.00 and earlier
ASTRO Digital Spectra™ radios that are receiving
with PL codes 4B- 146.2 Hz, 5Z- 151.4 Hz, 5A-
156.7 Hz, 5B- 162.2 Hz AND on a 12.5 KHz channel
may not unmute. SRN1357
ASTRO Digital Spectra™ used with Vehicular
Repeater System (VRS) and ASTRO Digital
Spectra™consolette with Option L146 does not
operate correctly with Remote Mode
Change/Steer Functionality. SRN1374
R11.12.00-R11.14.00
ASTRO Digital Spectra™. Radio re-affiliates every
few seconds when in talkgroup scan. SRN1433.
DSP Firmware Version
Notes
05.xx.xx
This major release supports VSELP only.
06.xx.xx
This was the first DSP release for IMBE™
operation. It does not support subscriber AGC, and
is the most inferior sounding IMBE™ codec.
Anyone still using release 6 needs to upgrade
immediately. Reproduced audio during packet-loss
is extremely robotic sounding.
07.xx.xx
Some minor improvement over the audio
characteristics of IMBE™ DSP release 6. As of
07.03.09 it supports subscriber AGC, if used with
host firmware R07.01.01 or higher, with subscriber