High Dynamic Range Swept Rf/If Conversion Loss - Agilent Technologies 8719D User Manual

High Dynamic Range Swept RF/IF Conversion Loss

The HP 8719D/20D/22D's 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 jilter. The
output filtering demonstrates the analyzer's ability to make high dynamic range measurements.
Since the default source output power of the HP 8722D is below 0 dBm, no
Note
reduction in source output power is required for this procedure.
2. Calibrate and zero the power meter.
3. Connect the measurement equipment as shown in Figure 3-10.
To prevent connector damage, use an adapter (HP part number 1250-1462) as a
Caution
connector saver for R CHANNEL IN.
3 . 1 2 M a k i n g M i x e r M e a s u r e m e n t s ( O p t i o n