HP 8753E - Reducing Receiver Crosstalk

Reducing Trace Noise
You can use two analyzer functions to help reduce the effect of noise on the data trace:
n activate measurement averaging
n reduce system bandwidth
To Activate Averaging
The noise is reduced with each new sweep as the effective averaging factor increments.
2. Enter a value followed by
(XJ.
Refer to the “Application and Operation Concepts” chapter for more information on
averaging.
To Change System Bandwidth
By reducing the system bandwidth, you reduce the noise that is measured during the sweep.
While averaging requires multiple sweeps to reduce noise, narrowing the system bandwidth
reduces the noise on each sweep.
1. Press (&) ~~~~
..:
2. Enter the IF bandwidth value that you want, followed by a.
Narrower system bandwidths cause longer sweep times. When in auto sweep time mode, the
analyzer uses the fastest sweep time possible for any selected system bandwidth. Auto sweep
time mode is the default (preset) analyzer setting.
Reducing Receiver Crosstalk
To reduce receiver crosstalk you can do the following:
n Perform a response and isolation measurement calibration.
w Set the sweep to the alternate mode.
Alternate sweep is intended for measuring wide dynamic range devices, such as high pass and
bandpass filters. This sweep mode removes a type of leakage term through the device under
test, from one channel to another.
_ ,.. ,.
.,.,.. ;.., _.._
;
..,.,.,.,.,.,.,.,.,.,.,.,.,. _ _
n set the &em&e sweep, press Cal] ~~~~ ~~~~~~~~~~~.
. . . . .:::: : ..::..: :::;;;...i. . .:::L: .:..:. .: . . . . ~.Lwu>>.~ . . . . . ..v .v:::: ..A. /::::.:..::..
Refer to the procedures, located earlier in this chapter for a response and isolation
measurement calibration procedure.
Optimizing Measurement Results 6-67