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S:\Hp8960\E1960A GSM Mobile Test Application\A.04 Release\Proguide\Chapters\prog_prog_guide_step1.fm
Step 1: Set the Test Set’s Operating Mode to Active Cell
Step 1: Set the Test Set’s Operating Mode to Active Cell
Background
The test set contains a GSM base station emulator (BSE). The BSE’s primary purpose is to provide the GSM
call processing necessary for parametric measurements on the RF and audio signals of a GSM mobile station
(MS).
An important characteristic of the test set’s BSE is its operating mode. The operating mode sets the way in
which the BSE interacts with the mobile station. The BSE has two operating modes; active cell mode and test
mode.
Active cell mode is used when emulating a normal GSM cell. Test mode is used when it is not possible, or not
desired, to communicate with the MS via over-the-air signaling, but downlink stimulus and uplink
measurements are still needed.
This Programming Guide focuses on programming the test set’s BSE in active cell operating mode.
Overview of Active Cell Operating Mode
Active cell is the default operating mode of the test set’s BSE and is used when emulating a normal GSM cell
(that is, active signaling between the MS and the BSE).
Active Cell Features
The basic features provided by the BSE when the operating mode is set to active cell are:
• Generation of a BCH (broadcast channel) without TCH (traffic channel).
• Support for location updating.
• Call setup, both MS and BSE originated.
• Changing TCH parameters during a call using over-the-air signaling.
• BSE initiated and MS initiated call disconnection.
• All measurements supported in the test application are available.
• The BSE automatically controls the test set’s demodulation receiver.
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