B-5
Glossary
RPE-LTP
Regular Pulse Excitation Long Term Prediction. A commonly
used technique for converting voice from analog to digital form.
This is the CODEC that is used by GSM, DCS1800 and
PCS1900 systems.
RSSI
Received Signal Strength Indicator. Reception level.
SACCH
There is a spare frame every 12 TCH frames and this is used for
the SACCH (Slow Associated Control Channel). On the down-
link, the SACCH is used to send slowly but regularly changing
control information to the mobile. The up-link carries
information about the received signal strength (RXLev) and
quality (RXQual)of the TCH and the adjacent cell BCH
measurement.
SDCCH
The SDCCH (Stand-alone Dedicated Control Channel) is
sometimes configured on a BCH and sometimes on its own
physical channel. The SDCCH has a different multiframe
structure to the TCH. SDCCH bursts repeat less frequently than
one per frame. For this reason, more than 8 SDCCH can share a
physical channel. The data rate on a SDCCH is lower than on
the TCH. During the call set-up process, there can be a lot of
time between the mobile sending a RACH and getting service,
to the start of the conversation. During this period, no speech is
transmitted (though communication does take place). This
transitional time means less of the cells resource are used, the
SDCCH improves efficiency and provides a useful holding
channel for the mobile until, speech data needs to be
exchanged.
SIM
The SIM (Subscriber ID Module) card plugs into every GSM
mobile and holds all the unique subscriber information. It also
stores dialing lists, network allowable usage etc.
SMSCB
Short Message Service Cell Broadcast. This service is
analogous to the Teletext service offered on television. It
permits a number of unacknowledged general messages to be
broadcast to all mobiles in a particular region.
Speech Coder
An electronic circuit that converts the audio signal into data and
minimizes the number of bits needed to represent the audio.
Trigger Delay
The time delay between a valid trigger event and the digital
demodulation of the signal, or the delay between the trigger
event and the beginning of a measurement.
Содержание 8922M
Страница 8: ...Contents Contents 6...
Страница 21: ...1 1 1 Installing Your Agilent 8922M S...
Страница 24: ...1 4 Installing Your Agilent 8922M S Fuses and Power Cords Power Cords Agilent Part Agilent...
Страница 29: ...2 1 2 Making Measurements...
Страница 59: ...2 31 Making Measurements If You Have Problems with a Measurement Figure 2 16...
Страница 61: ...2 33 Making Measurements If You Have Problems with a Measurement Trigger Range For Pulsed RF...
Страница 75: ...2 47 Making Measurements Advanced Features...
Страница 76: ...3 1 3 Verifying Performance...
Страница 106: ...3 31 Verifying Performance Agilent Technologies 8922M S Specifications...
Страница 224: ...4 118 Screens Service Service This screen is documented in the service documentation To escape press PREV...
Страница 235: ...4 129 Screens Tests Tests Instrument BASIC Refer to chapter 8 Instrument BASIC for information about the Tests Screen...
Страница 236: ...4 130 Screens Tests...
Страница 237: ...5 1 5 Keys...
Страница 238: ...5 2 Keys Key Map Key Map...
Страница 275: ...6 27 Connectors Timing Diagrams Timing Diagrams Figure 6 2 Digital Demodulation Timing Specification Table...
Страница 276: ...6 28 Connectors Timing Diagrams Figure 6 3 Digital Demod Timing Diagram...
Страница 277: ...6 29 Connectors Timing Diagrams Figure 6 4 Frequency Hop Timing Specification Table...
Страница 278: ...6 30 Connectors Timing Diagrams Figure 6 5 RF Generator Hop Address Source Ext Timing Diagram...
Страница 279: ...6 31 Connectors Timing Diagrams Figure 6 6 RF Analyzer Hop Address Source Ext Timing Diagram...
Страница 280: ...6 32 Connectors Timing Diagrams Figure 6 7 RF Generator Hop Address Source Int Timing Diagram...
Страница 281: ...6 33 Connectors Timing Diagrams Figure 6 8 RF Analyzer Hop Address Int Timing Diagram...
Страница 282: ...6 34 Connectors Timing Diagrams Figure 6 9 Reset Hop Once Address Source Int Timing Diagram...
Страница 283: ...6 35 Connectors Timing Diagrams Figure 6 10 Reset and Hold Hop Address Source Int Timing Diagram...
Страница 284: ...6 36 Connectors Timing Diagrams Figure 6 11 Hop Inhibit Address Source Int Timing Diagram...
Страница 297: ...8 1 8 Instrument BASIC...
Страница 341: ...A 1 A APPENDIX A...
Страница 364: ...A 24 APPENDIX A Protocol Log of a Typical Call...
Страница 365: ...B 1 B Glossary...
Страница 370: ...B 6 Glossary...
