5 Using E9300 E-Series Power Sensors
196 Keysight N1911A/1912A User’s Guide
5 press to display the Meas Avg Count pop-up.
6 Use the numeric keys to enter the required value.
7 Press to complete the entry.
Procedure
Switch off step detection as follows:
1 Press
. On dual channel meters, select the required channel.
2 Use the and keys to select the Step Detect setting field.
3 Press to check the step detection to Off.
4 Press key to close the Channel Setup screen.
Achieving stable results with GSM signals
Signals with a pulse repetition frequency (PRF) close to a multiple or sub-multiple
of the 440 Hz chopper-amplifier signal generate a beat note at a frequency
between the PRF and 440 Hz. Control over the filter settings is again required to
obtain stable results.
You should also ensure the filter is not reset when a step increase or decrease in
power is detected by switching the step detection off.
TIP The PRF of a GSM signal is approximately 217 Hz and thus requires
more averaging than most other TDMA signals. To achieve a stable
measurement use the filter setting procedures to set the .
Experimentally, a setting of 148 gives optimum results
although settings in the order of 31 or 32 give acceptable results if a
faster measurement is required.
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