Rohde & Schwarz CMU-K20, Operating Manual

Page: 48 / 646

Signalling Mode CMU-K20/-K21/-K22/-K23/-K24
1115.6088.12 2.14 E-10
Signalling Mode
In the Signalling mode the CMU first transmits a control channel signal to which the mobile is able to
synchronize. A call can then be established from either the CMU or the mobile. The measurement must
be synchronized to the signal transmitted by the mobile; an external trigger signal can not be used.
Call Setup and Signalling Parameters
The signalling processes and configurations are controlled via the Connection Control popup menu. A
control channel signal is switched on and the second of several Connection tabs contained in the Con-
nection Control popup menu is automatically displayed when the Connection test mode is selected (see
Menu Select menu on page 2.4 ; for the following examples, GSM1800-MS Signalling Meas . with the
Overview menu was selected, and another RESET was performed).
⇓
Step 1
The Connection (Signal On) tab indicates
the current signalling states, the character-
istics of the mobile phone and those of the
signals generated by the CMU
"
and the
MS under test.
In addition the network identity and the
characteristics of the input and output con-
nectors are shown.
#
The softkeys on the right side of the menu
lead to other signalling states. The
Main
Service and Network Support softkeys are
for switchover to GPRS signalling tests.
$
The Wideband Power softkey shows the
current status of the wideband peak power
measurement and its ratio to the maximum
input power
(Max. Level) set in the MS
Signal tab menu. At present, the wideband
power measurement is switched on, how-
ever, no signal is received because no call
connection with the mobile phone has
been established.
credit card format
plug-in format
CRT-Z2 1039.9005.02
GSM
TEST SIM
2
DEF 3
GHI 1
ABC
5 6 4
8
ÜVW 7
STU
.
-
0
9
XY Z
S C RCL M
Step 2
!
Insert a test SIM card of the appropriate
size into the phone and switch on.
%
!
If requested, enter the PIN number fol-
lowed by #.
(PIN No. of Rohde & Schwarz test SIM
card: 0000).
&
!
Make sure that your mobile is connected
to RF 2 (default input/output).
⇓
深圳德标仪器
135-1095-0799