Agilent Technologies E9300 manual Achieving Stable Results with GSM Signals, Input Settings , More

Measuring TDMA Signals

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.

Switch off step detection as follows:

1. Press System

Inputs

, Input Settings , More .

2.Press the Filter softkey to access the filter menu.

3.Press Step Det Off On to highlight Off .

The section “Setting the Range, Resolution and Accuracy” in the Agilent EPM series power meters Programming Guide shows you how to configure these parameters using the remote interface

Achieving Stable Results with GSM Signals

Signals with a pulse repetition frequency (PRF) close to a multiple or sub-multiple of the 220 Hz chopper-amplifier signal generate a beat note at a frequency between the PRF and 220 Hz. Control over the filter settings is again required to obtain stable results.

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 Length . Experimentally, a Length 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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