Rohde & Schwarz CMU-K20, Operating Manual

Page: 51 / 646

CMU-K20/-K21/-K22/-K23/-K24 Signalling Mode
1115.6088.12 2.17 E-10
Additional Information... Alternative Settings
and Measurements
... on Step 3
$
Network parameters
The purpose of network parameter settings in the mobile test
can be rather different from the original purpose (in the real
GSM network). We illustrate this with two examples:
The BA list (base station allocation list) informs the mobile
about the channels available in a given area. The mobile
uses the BA list to determine to which RF channel it will re-
ceive the next handover request. The CMU uses the
BA list
to test a mobile when the synthesizer is jumping continuously
from channel to channel and the software has to organize
this, to evaluate and report the results.
In the DTX (discontinuous transmission) mode the mobile
transmits traffic channel frames only when there is voice or
data to be transmitted. This mode is used mainly in order to
save mobile battery power. In the test mode, a DC current
measurement during DTX will provide information about a
possible leaking component of the mobile. No continuous
Power measurements can be done while DTX is enabled.
'
chapter 4, p. 4.169 ff.
... on Step 4
"
Location update
The information transmitted by the CMU on the control chan-
nel requests the mobile phone to perform a location update
procedure after switching-on. This is similar to a registration
procedure in analog and other digital networks and serves to
inform the base station that a certain mobile has been
switched on now and is available for calls.
'
chapter 4, p. 4.169 ff.
The Location Update parameter
in the Network tab determines in
which cases a location update is
performed.
#
MS Capabilities
The MS Capabilities list shows the basic properties of the
connected mobile station which are transmitted to the CMU.
•
The international mobile subscriber identity (IMSI) con-
sists of the 3-digit mobile country code, the 2-digit mobile
network code and the 10-digit mobile subscriber id. no.
•
The international mobile station equipment identity (IMEI)
consists of the 6-digit type approval code, the 2-digit final
assembly code, the 6-digit serial no. and the 1 or 2-digit
software version no.
The following hardware-related parameters determine the
maximum output power of the mobile station:
•
Power class (1 to 5)
•
MS revision level (phase I or II)
'
chapter 4, p. 4.146 ff.
A comprehensive list of mobile
station properties is displayed in
the
Call Established signalling
state.
Power classes and GSM revision
levels are listed with their maxi-
mum output power in section
Limits for the Average Burst
Power
in chapter 4.
深圳德标仪器
135-1095-0799