HP 8753D Option 011 Service Manual page 266

A11 Phase Lock
To observe the A11 analog bus nodes perform step A11, below. Then follow the node-speci c
instructions.
Step A .
Press:
PRESET
5
MEAS
ANALOG IN
5
MARKER
5
SYSTEM
SERVICE MENU ANALOG BUS ON
5
FORMAT
MORE REAL
5
Node 3 VCO Tune 2 (not used)
Node 4 Vbb Ref (ECL reference voltage level)
Perform step A11, above, and then press MEAS
REFERENCE VALUE -1.29
The trace should be within 0.3 V (one division) of the reference value. Vbb Ref is used to
compensate for ECL voltage drift.
RAFT
3/21/106 15:14
Artisan Scientific - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisan-scientific.com
5
x1
5 5
Service Key Menus and Error Messages 10-27
ANALOG IN 14 x1 SCALE REF
5 5
.3 x1
5 5 5