Rohde & Schwarz CMU-K20, Operating Manual

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CMU-K20/K21/K22/K23/K24 Non Signalling: Connection Control
1115.6088.12 4.85 E-11
Fig. 4-39 Connection Control – Trigger
Default Settings
The Default Settings checkbox assigns the default setting to all functions in the
Trigger tab (the default values are quoted in the command description in chapter 6
of this manual).
Remote control
TRIGger[:SEQuence]:DEFault ON | OFF
Meas. Trigger –
Source Source selects the source for the trigger event:
Free Run Trigger by the GSM input signal: The CMU detects the burst; the
exact timing is given by the training sequence. This setting may
slow down the measurements.
P/t Multislot, P/Slot , and P/Frame
measurements can not be performed in Free Run trigger mode.
RF Power The measurement is triggered by the level of the incoming burst
(rising or falling edge; see
Slope setting below), the trigger level
is specified via the Level parameters. Wideband power trigger on
the RF Front End.
IF Power The measurement is triggered by the level of the IF signal (rising
or falling edge; see
Slope setting below), the trigger level is
specified via the Level parameters. Narrow-band IF power
trigger.
Extern External trigger signal fed in via connector AUX 3 or AUX 4; see
Ext. Trigger ... setting below.
For the Free Run, RF Power and IF Power settings the input signal must be a burst
signal. The external trigger can be selected for all Non Signalling measurements. In
contrast, Signalling measurements must be triggered by the signal from the
signalling unit or from the mobile phone.
RF Power trigger signals have a small dynamic range which may not be sufficient
for triggering. It is recommended to trigger by the IF Power instead.
Note: If no measurement result can be obtained the trigger mode may not fit
to the trigger signal applied. Check the trigger mode and signal.
Remote control
TRIGger[:SEQuence]:SOURce FRUN | EXTern
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