Rohde & Schwarz CMU-K20, Руководство по эксплуатации

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CMU-K20/K21/K22/K23/K24
Signalling: Connection Control
1115.6088.12 4.167 E-12
Table-oriented Version
The table-oriented version of the
BS Signal
tab contains all BS signal settings of the softkey-oriented
version (see sections
Softkey-oriented Version: Single Slot Mode
on p. 4.162 and
Softkey-oriented
Version: Multislot Mode
on p. 4.165 ). Besides it defines:
•
A
Random Frequency Offset
that can change its sign after each GSM frame.
•
The additional RF channel
Aux TX.
•
The four
Hopping
sequences A, B, C, and D. The hopping sequences can be defined in the
signalling states
Signal On, Signal Off
and
Synchronized
. They are valid if the mobile is in
Single
Slot
mode only.
The active
Main Service (Circuit Switched
or
Packet Data)
is underlined in the
BS Signal
tab. In the
following, general parameters and parameters for circuit switched mode are described. For a
description of packet data parameters refer to section
RF Signals of the CMU (Connection Control – BS
Signal)
on p. 4.197 ff.
Fig. 4-75 Connection Control – BS Signal (table)
The following settings are not provided in the softkey-oriented versions of the
BS Signal
tab (see
sections
Softkey-oriented Version: Single Slot Mode
on p. 4.162 and
Softkey-oriented Version: Multislot
Mode
on p. 4.165 ff.).
Default Settings
The
Default All Settings
switch assigns default values to all settings in the
BS
Signal
tab (the default values are quoted in the command description in chapter 6
of this manual).
Remote control
–
Random Freq.
Offset
Enabling the
Random Frequency Offset
causes the (static) frequency offset (see p.
4.162 ) to randomly change its sign after each frame. More specifically, the
probability of a sign change of the frequency offset between two consecutive
frames is 50%. The random frequency offset has no effect if the static frequency
offset is 0 Hz.
The random frequency offset must be set in the
CEST
(circuit switched main
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