HP 8340B Manual page 206

5-16. LEVELED RF OUTPUT ADJUSTMENTS
Reference
Performance Test: Maximum Leveled Output Power and Accuracy
Service Section:
RF Section
Description
In this procedure, the RF output signal is checked in leveled mode. An oscilloscope and detector are
used to adjust the Step Recovery Diode (SRD, internal to the SYTM) for optimum bias and to eliminate
the possible occurrence of "squegging".
In the next procedure, the ALC loop gain in each band is adjusted for optimum operation.
A final section checks the RF output signal with a Spectrum Analyzer for the appearance of squegging
in any of the bands and allows a last fine adjustment to eliminate any squegging that is observed.
Z—AX IS
BLANK/MKRS
Figure 5-52. Leveled Power SRD Bias Adjustment Test Setup
HP 8340B/41B
Adjustments 5-101