Power Reference Oscillator Level Adjustment; Description; Adjustment Setup - HP E4418A Service Manual

Adjustments

Power Reference Oscillator Level Adjustment

Power Reference Oscillator Level Adjustment

Description

The power reference oscillator is factory adjusted to 1.0 mW ± 0.7%. This is
done using a special measurement system accurate to 0.5% traceable to
the National Institute of Standards and Technology (NIST) and allowing
for a 0.2% transfer error. To ensure maximum accuracy in re-adjusting 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.
Note
3-6
The power meter may be returned to the nearest HP office to have
the power reference oscillator checked and/or adjusted.
Power Meter
POWER
REF
HP 478A
Option H75
Figure 3-3: Adjustment Setup
HP 432A
Power Meter
V
RF
V
comp
HP EPM-441A/442A Service Guide
Digital
Multimeter
+
INPUT
INPUT