PAMS Technical Documentation
Trouble Shooting
NHM-3
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From WinTesla chose:
Product > Band > EGSM
Testing > RF Controls >
Rx continuous > Ch 60
Spectrum Analyzer
VCO output ( G600 out)
3788 MHz
No
Yes
PLL block functional
Oscilloscope
VCTCXO Power Supply
(G602 Vcc)
2,7 V
Oscilloscope
VCTCXO output
(G602 out) 26 MHz,
approx. 0.8 Vpp
VCTCXO is dead
Oscilloscope
VCO Power Supply
(G600 Vcc) 2,7 V
Yes
No
Check CCONT,
Software?? Phone not in
function
Check CCONT,
Software?? Phone not
in function
Spectrum Analyzer
VCO output ( G600 out)
Some signal between 3
and 4 GHz
VCO is dead
Check HAGAR,
wrong writting to HAGAR
(SCLK,SDATA,SLE,
HAGARRESET)
Yes
No
No
Yes
Yes
No
Oscilloscope
Turn the phone ON
and measure power
supply fo r the VCTCX
( G602 Vcc) 2,7 V
Oscilloscope
Measure the output
signal of the VCTCXO
( G602 out ) approx.
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 ( V600 )
Reason is something
else ( Software,
battery, etc. )
Yes
Yes
Yes
Yes
No
No
No
No
