Power Reference Oscillator Level Adjustment; Digital Voltmeter - HP 437B Service Manual

HP 437B
5-9. Power
Reference
Oscillator
Level
Adjustment
Reference
Description
Note UE |
HP 437B
POWER METER
POWER REF
1.00 mW 50 MHz
es a =m,
QODdQdo0|O0C0O
20 Beecboo| | |
Service Sheet A4C
The power reference oscillator is factory-adjusted to 1.0 mW +0.7% using a
special measurement system accurate to 0.5% traceable to the National
Bureau of Standards and allowing for a 0.2% transfer error. To ensure
maximum accuracy in readjusting the power reference oscillator, the
following procedure provides step-by-step instructions for using specified
Hewlett-Packard instruments of known capability. If equivalent instruments
are used, signal acquisition criteria may vary and reference should be made
to the manufacturer's guidelines for operating the equipment.
The Power Meter may be returned to the nearest HP office to have the
power reference oscillator checked and/or adjusted. Refer to Section 2,
PACKAGING.
HP _ 432A
POWER METER
meve DIGITAL VOLTMETER
THERMI STOR
MOUNT
Figure 5-4. Power Reference Oscillator Level Adjustment Setup
ADJUSTMENTS 5-9