Table 5-7. Transmitter Performance Checks; Transmitter Performance Checks - ASTRO APX 7000 Basic Service Manual

Sec 2: 5-10
Table 5-6. Receiver Tests for ASTRO Conventional Channels* (Continued)
Test Name System Analyzer
Residual Mode: Proj 25 Std
Audio Noise RF Control: Gen
Ratio Output Level: -47 dBm
Proj 25 Dev: 2.83 kHz
Code:
A) 1011 Hz PAT
B) Silence PAT
Meter: AC Volts
*
These tests require a communications system analyzer with the ASTRO 25 test options.
5.5

Transmitter Performance Checks

The following tables outline the performance checks for the transmitter.
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
(external) approximately 10 mV.
Voice For Modulation Analyzer:
Modulation FM measurements
(internal) 15 kHz LP Filter
Radio
As above

Table 5-7. Transmitter Performance Checks

Radio
TEST MODE CSQ
channel* or
programmed
conventional
channel
As above
As above
As above
Performance Checks: Transmitter Performance Checks
Test Set
As above
Test Set
PTT to continuous
(during the
performance
check).
As above
As above
Remove
modulation input.
PTT to OFF
(center)
Comments
Residual Audio Noise Ratio
-45 dB
Comments
VHF: 2.0 ppm
(272–348 Hz)
700/800 MHz: 1.5 ppm
(1.15–1.3 kHz)
UHF1: 2 ppm
(760–940 Hz)
UHF2: 2 ppm
(900–1040 Hz)
VHF: 1–6 Watts
700/800 MHz:
764–806 MHz: 2.5 Watts
806–870 MHz: 3 Watts
UHF1: 1–5 Watts
UHF2: 1–5 Watts
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