HP 11848A Service Manual page 101

Phase noise interface
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Model 11848A
Replaceable Parts
Table 7. Update Information for Instrument Changes
Reference
Designator
A1S1, A1S2,
A1S3
Serial
Prefix
2720A
Description of Change
Instruments with serial prefixes prior to 2720A have components A1S1, A1S2 and
A1S3 installed. These switches are not used, and if improperly set can cause the
instrument to malfunction. Any or all of the switches may be removed without affecting
the operation of the instrument.
These switches are not loaded in instruments with serial prefixes 2720A and above.
MP5
MP17
MP16
MP11
MP15
MP21
•MP13
Figure 6. Cabinet Parts
71

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