User Guide

PAMS
Technical Documentation
NSE–8/9
Troubleshooting
Page 46
Issue 1 07/99
6.5. Fault finding chart –UHF VCO and 13 MHz ref. oscillator
Oscilloscope
SUMMA N700 pin 21
(12)
Vdc = 1.8 ... 3.0 Volt
OK
Oscilloscope
SUMMA N700 pin 15
Vac = >2 Vpp,
13 MHz
VCTCXO G701 is OK
Oscilloscope
VCTCXO G701 OUT–
pin
Vdc = 1.4 Volt
Vac = app. 1 Vpp,
13 MHz
Check
Pulse–shaper D700
Oscilloscope
VCTCXO G701
VCC–pin
Vdc = 2.8 Volt
Check
VCTCXO G701
YES
NO
YES
YES
YES
NO
NO
NO
.
.