Rohde & Schwarz 1094.0006.50, Operating Manual

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CTS55 Getting Started With Quicktest
1094.0006.55 5.3 E-6
Explanations:
c
RF connection to mobile
For the RF connection to the mobile station, a high-grade cable should be used with an attenuation
ideally below 0.5 dB per meter. Hand held mobiles can be connected using the car installation set of-
fered by suppliers of mobiles. The following description of "Getting Started" assumes a good RF
connection so that compensation for external attenuation is not necessary. The "Coupler" key in the
Main Menu of the Autotest has to be set to off.
d
Power supply of mobile
If the mobile is supplied from an external power supply unit, make sure that this unit can provide the
required peak current. Digital mobile phones generate pulsed signals at RF and thus frequently have
a pulsed current drain. Problems may arise if power supplies are used that cannot provide such cur-
rents at constant voltage.
e
SIM card
GSM specifications define two formats of SIM card: cheque card format or a considerably smaller
format, the 15 x 20 mm plug-in SIM card. A mobile must have a SIM card inserted to be able to
make a call. For tests on mobiles performed with CTS, the test SIM card from Rohde & Schwarz
should be used.
f
Test SIM card
The Rohde & Schwarz test SIM card can be ordered as an accessory unit under the designation
CRT-Z2 (Order No. 1039.9005.02). This card has cheque card format but can easily be exchanged
for a plug-in card.