Performance Checks
20
Table 10. Receiver Tests for ASTRO Conventional Channels*
Test Name System Analyzer
Radio/Tuner
Software
Test Set Comments
Bit Error rate
(BER) Floor
Mode: Proj 25 Std
RF Control: Gen
Output Level: -47 dBm
Proj 25 Dev: 2.83 kHz
Code: 1011 Hz PAT
Radio Tuner
Software is
required; Bit
Error Rate
Screen
PTT to OFF (center) BER <0.01%
Reference
Sensitivity
As above; lower the output
level until 5% BER is obtained
As above As above Output level
<0.35 µV
(-116 dBm)
Audio Output
Distortion
Mode: Proj 25 Std
RF Control: Gen
Output Level: -47 dBm
Proj 25 Dev: 2.83 kHz
Code: 1011 Hz PAT
Meter: Ext. Distortion
Radio Tuner
Software not
used;
Radio: Out of
TEST MODE;
Select a
conventional
ASTRO channel
PTT to OFF (center)
Meter selector to
Audio PA
Spkr/Load to
Speaker
Distortion < 3.0%
Residual Audio
Noise Ratio
Mode: Proj 25 Std
RF Control: Gen
Output Level: -47 dBm
Proj 25 Dev: 2.83 kHz
Code:
A) 1011 Hz PAT
B) Silence PAT
Meter: AC Volts
As above As above Residual Audio
Noise Ratio >45dB
* These tests require a communications system analyzer with the ASTRO 25 test options.
Some tests require the use of the Radio Tuner Software.