problem appears. Use the table below to help isolate the
problem.
Failing Data Points Most Likely Causes
2 GHz only Low band microcircuit (A24)
>
26.5 GHz
(83640B /50B and
83640L /50L)
Amp/Doubler (A32)
All Other Cases YO (A26); amp/multiplier (A28);
amp/lter (A29); amp/switch (A33);
dual modulator (A38); and pulse
mod switched lter (A42)
After taking action, go to the Troubleshooting Foldout,
block 1 (located just prior to the \Special Cases" tab).
ILT.2660
The most likely cause is the YO driver assembly (go to
A13.9000), the next possibility is YO assembly (go to
RF.2690).
After taking action, go to the troubleshooting foldout,
block 1 (located just prior to the \Special Cases" tab).
ILT.2670
The most likely faults are listed below:
1. The most likely fault is the measurement setup. Check
the setup.
2. Check the calibration constants listed in the
Agilent
Technologies 8360 B-Series Swept Signal Generator/
L-Series Swept CW Generator Service Guide
.Pay
special attention to the following calibration constants:
a. Lock dwell time.
b. Max phase lock wait.
3. If an unlock message appears, press
4
PRESET
54
SERVICE
5
NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
Unlock Info
. The following is a prioritized list. Find
the rst one that applies.
a. REF UNLOCK: go to A7.9000.
b. SAMPLER UNLOCK: go to A6.9000.
c. FRACN UNLOCK: go to A4.9000.
Agilent 8360 Instrument Level Troubleshooting 1a-47
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