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PAMS Technical Documentation
Troubleshooting
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RX troubleshooting
Apply NO signal
to antenna connector
No
Check
C508, R500
Yes
RX chain functional
Local Burst mode
Set to Local Mode
Band = don’t care
Channel = don’t care
RX Burst mode
Measure RXI and RXQ
with oscilloscope
(500mV/div, 500us/div)
Both signals looks like
Figure 1 (Note 1+2)
One or both signals
Figure 3 or Figure 4
looks like Figure 2 or
Yes
No
One or both signals
looks like Figure 5
Yes
Check
C512
No
One or both signals
looks like Figure 6
Check
C514
Yes
No
One or both signals
looks like Figure 7
Check
C526
Yes
No
Check
Hagar N500, R504
Go to
Troubleshooting chart
EGSM RX
Note 1: Only valid for MCU
sw version 04.14 or newer.
Please reflash if older.
Note 2: If bursted signal
occur, it might be due to
external disturbances.
Change channel and redo.
Check
R507,C529
and BB
Oscilloscope
VREF_RX/R507 = 1.2V
No
Yes