Motorola ASTRO SPECTRA Service Manual

February 3, 2003 6881076C20-E
5-8 Performance Checks: Transmitter Performance Checks
PL Modulation
(radios with
conventional, clear
mode, coded
squelch operation
only)
Change frequency to 1st channel
test frequency**;
B/W to narrow
TEST MODE,
1 TPL
Remove
modulation input
from dummy
microphone.
Press and hold
PTT switch.
Deviation:
VHF, UHF, and 800
MHz:
>= 500 Hz but <= 1000
Hz
Talkaround
Modulation (radios
with conventional,
clear mode,
talkaround
operation only)
Change frequency to conventional
talkaround frequency.
Mode: PWR MON
deviation, attenuation to –70,
input to RF In/Out
Monitor: DVM, ac volts
Set 1 kHz Mod Out level for 80
mVrms at dummy microphone.
Conventional
talkaround
personality
(clear mode
operation)
1 CSQ
Press and hold
PTT switch.
Deviation:
UHF and 800 MHz:
>= 3.8 kHz but <= 5.0
kHz
Talkaround
Modulation (radios
with conventional,
secure mode,
talkaround
operation only) *
Change frequency to conventional
talkaround frequency.
Mode: PWR MON
deviation, attenuation to –70,
input to RF In/Out
Monitor: DVM, ac volts
Mod: 1 kHz out level for 80 mVrms
at dummy microphone.
Conventional
talkaround
personality
(secure mode
operation).
Load key into
radio 1 sec.
Press and hold
PTT switch.
Deviation:
UHF and 800 MHz:
>= 3.6 kHz but <= 4.4
kHz
* The secure mode, talkaround modulation test is only required for radios that do not have clear mode
talkaround capability.
** Test frequencies are listed in
Table 5-2.
Table 5-5. Transmitter Performance Checks (Continued)
Test Name System Analyzer Radio
Test
Condition
Comments

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)