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S:\HP892XX\USRGUIDE\manual\decoscrn.fb
Chapter 8, Signaling Decoder Screen
Using the NMT Decoder/Encoder
Automated NMT Radio Tests
The HP 11807A Option 006 NMT Cellular Tests software for the HP 8920A
provides comprehensive automated tests of NMT mobile stations. All Test Set
RF, AF, and encoder/decoder settings are made automatically, requiring minimal
operator inputs.
The test type and sequence, measurement specifications, and instrument settings
are easily configured for the device being tested. Customized test procedures can
be stored on external disks or memory cards for later use.
All HP 11807 Test Software packages include comprehensive documentation
explaining hardware connections and software configuration and operation.
Required Test Set Settings
The following Test Set settings should be made before using the NMT Encoder/
Decoder screens. These settings assume the Test Set is in its preset state.
RF Generator Settings
AFGen1 To: Audio Out and Off
AFGen2 To: FM and 3.5 kHz
RF Analyzer Settings
Tune Mode: Manual
Input Atten: Hold and 0 dB
Squelch: Fixed
AF Analyzer Settings
AF Anl In: FM Demod
Filter 1: 300Hz HPF
Filter 2: 15kHz LPF
De-Emphasis: Off
Initial NMT Encoder Settings
Mode: NMT
DUT: MS (for testing Mobile Stations)
Initial NMT Decoder Settings
Input Level: 3.0 kHz
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