Manual - 8500A Series Peak Power Meter - Giga-tronics

Series 8500A Peak Power Meters
5.3 Calibration Procedures
Using all solid state components, the Model 8501A/8502A meters are extremely rugged and reliable.
Consequently, there is very little drift due to component aging, and adjustments to the units are rarely
required. If measurements indicate that an adjustment is set within the indicated range, do not attempt to
make it exact. It is often the case that variations in the equipment being used to make the test account for
small differences in measured values. Since some adjustments can be interactive, be absolutely sure that
an adjustment is required before making it.
These procedures should be performed whenever the instrument is due for routine calibration, or at any
time calibration is required due to environmental or physical conditions. All test points and adjusting
components are labeled and are accessible at the top of the PC boards. It is not necessary to remove any
PC boards from the unit to perform these calibration procedures.
Figure 5-3 is a reference locater for the various components required for adjusting purposes during the
calibration procedure.
If you need to calibrate any of the RF detectors used with the PPM (such as after replacing the diode
element), you can do it in the field with the Giga-tronics PROM Programming Accessory Kit, P/N 16976.
This kit contains all of the necessary components and instructions required for proper detector
calibration. If the kit is not available, the detector can be returned to the factory for calibration.
5-8 Manual No. 20790, Rev C, November 1998
Superceded by Revision D, March 2009