Motorola ASTRO DIGITAL XTS 3000 series - Table 8 Transmitter Performance Checks

11
Table 8 Transmitter Performance Checks
Test Name System Analyzer Radio Test Set Comments
Reference
Frequency
Mode: PWR MON 4th
channel test frequency❖
Monitor: Frequency
error. Input at RF In/Out
TEST MODE,
4 CSQ
PTT to continuous
(during the
performance check).
Frequency error to be ≤
±1.2kHz.
Power RF As above As above,
4 CSQ
As above Refer to Maintenance
Specifications page in
front of manual.
Voice
Modulation
Mode: PWR MON 4th
channel test frequency❖
atten to –70, input to RF
In/Out.
Monitor: DVM, ac Volts.
Set 1kHz Mod Out level
for 0.025Vrms at test set,
80mVrms at ac/dc test
set jack
As above,
4 CSQ
As above, meter
selector to mic
Deviation: 800MHz: ≥
3.6kHz but ≤ 5.0kHz
Voice
Modulation
(internal)
Mode: PWR MON 4th
channel test frequency❖
atten to –70, input to RF
In/Out
TEST MODE,
4 CSQ, output
at antenna
Remove modulation
input
Press PTT switch on radio.
Say “four” loudly into the
radio mic. Measure
deviation: 800MHz: ≥
3.8kHz but ≤ 5.0kHz
PL Modu-
lation (radios
with conven-
tional, clear
mode, coded
squelch oper-
ation only)
Change frequency to a
conventional transmit
frequency; BW to narrow
Conventional
coded
squelch
personality
(clear mode
operation) 4
TPL
As above Deviation: 800MHz: ≥
500Hz but ≤ 1000Hz
Talkaround
Modulation
(radios with
conventional,
clear mode,
talk-around
operation
only)
Change frequency to
conventional talk-
around frequency.
Mode: PWR MON
deviation, attenuation to
–70, input to RF In/Out.
Monitor: DVM, ac volts
Set 1kHz Mod Out level
for 25mVrms at test set.
Conventional
talkaround
personality
(clear mode
operation)
1 CSQ
As above Deviation: 800MHz: ≥
3.8kHz but ≤ 5.0kHz
Talkaround
Modulation
(radios with
conventional,
secure mode,
talkaround
operation
only) (**)
Change frequency to
conventional talk-
around frequency.
Mode: PWR MON
deviation, attenuation to
–70, input to RF In/Out.
Monitor: DVM, ac volts
Mod: 1kHz out level
for25mVrms at test set.
Conventional
talkaround
personality
(secure mode
operation).
Load key into
radio 1 sec.
As above Deviation: 800MHz: ≥
3.6kHz but ≤ 4.4kHz
* 800MHz radios only
** The secure mode, talkaround modulation test is only required for trac mode radios which do not have clear mode
talkaround capability.
❖ See Table 6