HP 8753E manual Reducing Trace Noise, Reducing Receiver Crosstalk, To Activate Averaging

Reducing Trace Noise

You can use two analyzer functions to help reduce the effect of noise on the data trace:

nactivate measurement averaging

nreduce 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:

nPerform 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