User Guide

PAMS
Technical Documentation
RAE-3
8. Troubleshooting
Page 8 – 127
Issue 1 06/01
If the phone goes ‘dead’ very short time after the power is turned ON, possible
reason for this might be that 13 MHz system clock signal is not coming to the
BB. Use the following chart to find the problem.
Oscilloscope
Turn the phone ON
and measure power
supply fo r the VCTCX
( G800 Vcc) 2.7 V
Oscilloscope
Measure the output
signal of the VCTCXO
( G830 out) appx.
o,8 Vpp, 26 MHz
Oscilloscope
13 MHz buffer input
approx. 0,3 Vpp
Oscilloscope
13 MHz buffer output
approx. 0,4 Vpp
Check CCONT, phone
is ’dead’
VCTCXO is ’dead’ Check HAGAR,
divider by 2 in HAGAR
not in function ( not
enabled)
Buffer transistor not in
function ( V800)
Reason is something
else ( Software,
battery, etc. )
Yes Yes
Yes
Yes
No No No No
Figure 130.