User`s guide

Using E9300 E-Series Power Sensors 5

N1911A/1912A P-Series Power Meters User’s Guide 161

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.

Enter

NOTE

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.

Length