Receiver Performance Checks - Motorola APX 1000 Basic Service Manual

Performance Checks: Receiver Performance Checks
5.2.4 RGB Test Mode
To perform the RGB Color Test:
1. Press and release Top Button (Orange button)
2. Press any key; Crosstalk test patterns appears.
3. Press any key; White color test appears.
4. Press any key; Red color horizontal lines appears.
5. Press any key until all 13 red color horizontal lines appears.
6. Press any key; Green color vertical line appears.
7. Press any key until all 13 green color vertical lines appears.
8. Press any key; Black color test appears.
9. Press any key; Blue color test appears.
10. Press any key; Vendor specific display test appears.
11. Press any key; "Test completed" appears.
5.3

Receiver Performance Checks

The following tables outline the performance checks for the receiver.
Test Name System Analyzer
Reference RF Control: Monitor
Frequency Meter: RF Display
Display: Bar Graphs
Freq: Selected radio TX
freq.
Rated Audio RF Control: Gen
Output Level: -47 dBm
Freq: Selected radio RX
freq.
Mod: 1 kHz tone @
3 kHz dev.
Meter: AC Volts
Distortion As above, except
Meter: Ext Dist.
Sensitivity As above, except
(SINAD) Meter: SINAD
Noise Squelch Set as for rated audio
Threshold check
(only radios
with
conventional
system need
to be tested)
*
See Table 5-4 on page
Table 5-5. Receiver Performance Checks
Radio
TEST MODE CSQ
channel* or
programmed
conventional
channel
As above
As above
As above
Out of TEST
MODE; select a
conventional
system
1:5-5.
Test Set
PTT to VHF: ±2 ppm (272–348 Hz)
continuous UHF1: ±2 ppm
(during the UHF2: ±2 ppm
performance 700/800 MHz: ±1.5ppm
check) (1146–1305 Hz)
PTT to OFF Set volume control to
(center) 3.74 Vrms
As above Distortion < 3.0%
As above RF input to be < 0.35 µV
As above Set volume control to
3.74 Vrms.
Set RF level to -130 dBm and
raise until radio unsquelches.
Unsquelch to occur at
< 0.25 µV. Preferred SINAD =
6-8 dB.
5-7
Comments