High Dynamic Range Swept Rf/If Conversion Loss; Set Measurement Parameters For The If Range; Perform A Power Meter Calibration Over The If Range - Agilent Technologies 8753ET User Manual

High Dynamic Range Swept RF/IF Conversion Loss

The frequency offset mode enables the testing of high dynamic range frequency converters
(mixers), by tuning the analyzer's high dynamic range receiver above or below its source,
by a fixed offset. This capability allows the complete measurement of both pass and reject
band mixer characteristics.
The analyzer has a 35 dB dynamic range limitation on measurements made directly with
its R (phaselock) channel. For this reason, the measurement of high dynamic range mixing
devices (such as mixers with built in amplification and filtering) with greater than 35 dB
dynamic range must be made on either the analyzer's A or B channel, with a reference
mixer providing input to the analyzer's R channel for phaselock.
This example describes the swept IF conversion loss measurement of a mixer and filter.
The output filtering demonstrates the analyzer's ability to make high dynamic range
measurements.

Set Measurement Parameters for the IF Range

Set the following analyzer parameters:
Preset
Start 100 M/µ
−5
PWR RANGE MAN
Power
NUMBER of POINTS
Sweep Setup

Perform a Power Meter Calibration Over the IF Range

1. Calibrate and zero the power meter.
2. Connect the measurement equipment as shown in
CAUTION To prevent connector damage, use an adapter (part number 1250-1462) as a
connector saver for R CHANNEL IN.
Stop 1 G/n
x1
10
High Dynamic Range Swept RF/IF Conversion Loss
x1
Figure 2-16.
Making Mixer Measurements
2-19