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Signalling: Modulation Measurements
CMU-K20/K21/K22/K23/K24
1115.6088.12 4.114
E-12
Modulation Measurements
The menu group
Modulation
contains the functions for measurement of the modulation parameters of
the RF signal transmitted by the mobile phone. The popup menu
Modulation Configuration
is used for
configuration of the measurements; the measurement results are displayed in the graphical
measurement menu
Modulation
.
Apart from few exceptions, the menu group
Modulation
does not differ from its corresponding menu
group in the measurement mode
GSM400/850/900/1800/1900-MS Non Signalling
(see p.
4.38
ff.):
1. The hotkey
Meas. Slot
determines the timeslot that is measured in all
Multislot
configurations. In the
graphical display, this measured timeslot is marked by
Meas. Slot
.
Meas. Slot
is a general
parameter that is valid for all measurement groups and also provided in the
Analyzer
tab of the
Connection Control
menu. For more information see p.
4.185
.
2. In addition to the maximum input level, the attenuation and the RF channel, the first parameter line
also contains the power control level (PCL) of the mobile. The PCL can be set via the
PCL/Channel
softkey and can be used to define the input level
(Input Level
softkey).
3. The trigger sources
Signalling,
Free Run, RF Power,
and
IF Power
are available. This means that
the measurement is triggered by the signal from the CMU's signalling unit or the mobile phone;
triggering by an additional external signal (parameter
External)
is not possible.
Menu Select
Menu Select
Fig. 4-52 Measurement menu Modulation
Test Settings
The selections and test settings provided by the
Ext. Phase Err. GMSK, Analyzer Level,
and
Marker/Display softkeys are identical with those in the
Non Signalling
mode (see section
Test Settings
on page
4.39
ff). The
MS Signal, BS Signal
and
Network
softkeys and the
Meas. Slot
hotkey are equal
to the softkeys of the same name in the
Power
menu (see page
4.98
ff).
深圳德标仪器
135-1095-0799
Содержание CMU-K20
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