Transmitter Performance Checks - Motorola APX 1000 Basic Service Manual

5-10
5.4

Transmitter Performance Checks

The following tables outline the performance checks for the transmitter.
Table 5-8. Transmitter Performance Checks – APX 2000/ APX 4000 (Two Knobs)
Test Name System Analyzer
Reference RF Control: Monitor
Frequency Meter: RF Display
Display: Bar Graphs
Freq: Selected radio TX
freq.
RF Power As above
Voice As above. Set fixed 1 kHz
Modulation audio level to 400 mV.
(external)
Voice RF Control: Monitor
Modulation Meter: RF Display
(internal) Display: Bar Graphs
Freq: Selected radio TX
freq.
PL Modulation As above
(radios with
conventional,
clear mode,
coded squelch
operation only)
Secure As above
Modulation
(radios with
conventional,
secure mode,
talkaround
operation only)
*
See Table 5-5.
Performance Checks: Transmitter Performance Checks
Radio
TEST MODE CSQ PTT to continuous
channel* or (during the
programmed performance
conventional check).
channel
As above As above
As above As above
As above Remove
modulation input.
PTT to OFF
(center)
Conventional PTT to continuous
coded squelch (during the
personality (clear performance
mode operation) check)
or TPL channel
(test mode*)
Programmed As above
conventional
channel (secure
mode operation)
Load key into
radio.
Test Set
VHF: ±2 ppm
(272–348 Hz)
UHF1: ±2 ppm
UHF2: ±2 ppm
700/800 MHz: ±1.5ppm
(1146–1305 Hz)
VHF: 1–5 Watt
UHF1: 1–5 Watt
UHF2: 1–5 Watt
700: 1–2.7 Watt
800: 1–3 Watt
Deviation:
(12.5 kHz) ≥ 2.1 kHz, but
≤ 2.5 kHz
(25 kHz) ≥ 4.1 kHz, but
≤ 5.0 kHz
Press PTT button on radio.
Say "four" loudly into the
radio mic. Measure
deviation:
(12.5 kHz) ≥ 2.1 kHz but
≤ 2.5 kHz
(25 kHz) ≥ 4.1 kHz but
≤ 5.0 kHz
Deviation:
(12.5 kHz) ≥ 375 Hz but
≤ 500 Hz
(25 kHz) ≥ 500 Hz but
≤ 1000 Hz
Deviation:
≥ 3.7 kHz but ≤ 4.3 kHz
Comments