Table 5-6. Receiver Tests For Astro Conventional Channels - Motorola APX 3000 Basic Service Manual

Performance Checks: Receiver Performance Checks
Test Name System Analyzer
Bit Error rate Mode: Proj 25 Std
(BER) Floor RF Control: Gen
Output Level: -47 dBm
Proj 25 Dev: 2.83 kHz
Code: 1011 Hz PAT
Reference As above; lower the
Sensitivity output level until 5% BER
is obtained
Audio Output Mode: Proj 25 Std
Distortion RF Control: Gen
Output Level: -47 dBm
Proj 25 Dev: 2.83 kHz
Code: 1011 Hz PAT
Meter: Ext. Distortion
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.

Table 5-6. Receiver Tests for ASTRO Conventional Channels*

Radio Tuner
Software (Bit Error
Rate screen) is
required
As above
Radio Tuner
Software not used;
Radio: Out of
TEST MODE;
Select a
conventional
ASTRO channel
As above
Radio Test Set
PTT to OFF
(center)
As above
PTT to OFF
(center)
Meter selector to
Audio PA
Spkr/Load to
Speaker
As above
Comments
BER < 0.01%
(Use test setup shown in
Figure 6-1
)
Output level < 0.35 µV
(-116 dBm)
(Use test setup shown in
Figure 6-1
)
Distortion < 3.0%
Residual Audio Noise Ratio
-45 dB
5-7