Scalar Analysis Measurement with User Flatness Corrections,

Example 4

The following example demonstrates how to setup a scalar analysis measurement (using an HP 8757 Scalar Network Analyzer) of a 2 to 20 GHz test device such as, an amplifier. User flatness correction

is used to compensate for power variations at the test port of a directional bridge. Follow the instructions to set up the synthesizer, then configure the system as shown in Figure 1-21.

Note

The synthesizer’s rear

panel language and address switches must be

 

set to 7 and 31 (all l’s), to change the language or address of the

 

synthesizer from the front panel. The programming language must be

 

set to Analyzer. Refer to menu map 8, System, to find the location

 

of softkey Programming Language Analyzer (asterisk on = active

 

language).

 

 

 

 

 

SIONRL

SCF ILRR

 

SYNTHESIZER

NETINI”-’RNRLYZEN

DETECTOR

OIRECTIONRL

DETECTOR I

Figure l-2 1. Scalar System Configuration

Example Overview

In this example you use an HP 437B power meter to automatically enter correction data into the array. It is necessary to turn off

the HP 8757 System Interface (controlled from the front-panel of the analyzer) so that the synthesizer can temporarily control the power meter over HP-IB . When the correction data entry process is complete, enable user flatness correction and set the desired test port power level. Then store the correction table and synthesizer configuration in the same register that contains the analyzer configuration. Re-activate the HP 8757 System Interface and recall

Getting Started Advanced 1-43