Rohde & Schwarz CMU-K20, Руководство по эксплуатации

Страница: 259 / 646

CMU-K20/K21/K22/K23/K24
Signalling: Connection Control
1115.6088.12 4.181 E-12
Trigger (Group Configuration – Trigger)
The
Trigger
tab is part of the second group of tabs in the
Connection Control
menu. It is accessible
after pressing the
1 / 2
toggle hotkey once. Pressing
1 / 2
again switches back to the first group of tabs
described above.
The
Trigger
tab defines the trigger condition for the measurement and the routing of trigger signals.
Fig. 4-79 Group Configuration – 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
Trigger –
Source
Source
selects a signal to trigger the measurements:
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, Power/Slot
, and
Power/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.
Signalling
Triggering by the signalling unit of the instrument, according to
the expected frame timing of the RF signal re-transmitted by the
MS under test (uplink frame trigger). The uplink frame trigger is
always available while the
Signalling
test mode is active and the
CMU transmits an RF signal (i.e. except in the signalling state
Signal Off)
.
深圳德标仪器
135-1095-0799