Agilent Technologies 8922 P manual Chapter

Page 17

Understanding the HP/Agilent 8922 GSM HSCSD Test System

Getting an overview of the HP/Agilent 8922 GSM HSCSD Test System

The HP/Agilent 8922 GSM HSCSD Test System is used either as a stand-alone instrument controlled manually via the front panel user interface, or as part of an automated test system controlled remotely over the GPIB bus using a PC or workstation. Note that manual and remote operation are not possible simultaneously.

The HP/Agilent 8922 GSM HSCSD Test System provides one conﬁguration consisting of two uplink and two downlink timeslots (2x2) or two downlink and one uplink timeslot (2x1). Data rates of 9.6 and 14.4 kbit/s on each timeslot are supported. The timeslots used are always adjacent, with the master channel in the ﬁrst of these slots. You are able to independently change the uplink and downlink power levels on the two downlink timeslots and make measurements on either timeslot as required.

Note that the system does not perform any data channel decoding on the uplinks and only provides pre-coded data on the downlinks. The current system only allows transparent data links, which means that the RLP data layer is not supported.

Operating modes The master unit operates in Active Cell Mode and is responsible for all protocol messages. The mobile must therefore camp to the master unit, establish the call to it and receive channel assignment commands from it etc.

The slave unit operates in Test Mode. It generates a second downlink TCH and can analyze a second uplink TCH (if it exists). The slave unit remains in synchronization with the master unit at all times.

The BCH of the slave unit includes information to prevent the mobile from camping to the slave, thus ensuring that the mobile camps to the master unit. To discourage unsynchronised operation, the slave unit does not generate a downlink TCH unless it has received a reset signal from the master unit.

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Contents HP/Agilent 8922 GSM Hscsd Test System Option #K09 Warranty Limitation of Remedies and Liability Assistance Statement of Compliance Manufacturer’s Declaration Sound EmissionProhibited Earthing ground, incorporated in the power cord. The mainsInstrument dangerous. Intentional interruption is Safety Symbols Safety SymbolsISM 1-A User’s Guide Abbreviations OverviewContents Remote operation Returning equipment for repair Upgrading the HOP Controller ROM and Firmware Understanding the HP/Agilent HP/Agilent 8922 GSM Hscsd Test System, option #K09 Getting an overview of the HP/Agilent GSM Hscsd Test SystemChapter Features Setting up the HP/Agilent Before you start Checking the HP/Agilent 8922 Requirements for Hscsd Front panel connections Making the front panel connectionsStep Making the rear panel connectionsRear panel connections Inserting the keycard into the HP/Agilent Enabling the Hscsd functionalityTests screen Conﬁg screen Calibrating the overall system Manual operation Conﬁguring the system Message Frame reset sent appears in the top left-hand corner Establishing a call Measuring BER Making measurementsChoosing which timeslot to measure Hscsd control screen Changing power levels, timeslot and channelsEnding a call Ending a call Screens Instrument type Conﬁg screenChapter Slave address Master downlink amplitude Hscsd screenMaster channel Slave offsetSelect ‘Master’ to measure before signalling mobile Slave timeslot Master timeslotCall Type Measure Data rateMaster Tx level Master input level Slave Tx level Master modeSlave input level Slave control To Screen menu Peak power displayMobile reports Fast BER screen Fast BER ScreenLoopback Remote operation Introduction Conﬁgure Instrument Type comand syntax Conﬁgure Subsystem Gpib CommandsCONFigureINSTrumentTYPE DISPlaySCReen Hscsd Display Subsystem Gpib CommandsDisplay Screen command syntax Hscsd Subsystem Gpib Commands Hscsd command syntax master unit SYNC? TCH Hscsd command syntax slave unitHSCSdMASTerTCHARFCn HSCSdMASTerSTATusTCHTSLot HSCSdMASTerDOWNlinkAMPLitude Command 0ptionsHSCSdMASTerTCHTLEVel HSCSdMASTerUPLinkAMPLitude HSCSdMASTerUPLinkAMPLitudeCONTrol HSCSDMASTerCALLTYPE HSCSDMASTerCALLRATE HSCSdSLAVeSTATusSYNC HSCSdSLAVeSTATusTCHTSLot? HSCSdSLAVeDOWNlinkAMPLitudeOFFSet HSCSdSLAVeTCHTLEVel HSCSdSLAVeUPLinkAMPLitude HSCSdSLAVeUPLinkAMPLitudeCONTrol Conﬁguring the system Remote operating proceduresMaking measurements Establishing a callChanging channels, timeslot and power levels Ending a call Clear Screen Example code showing a dual-band handover from E-GSM to DCSPause Example code showing a dual-band handover from E-GSM to DCS Returning equipment for repair Return Procedure Chapter Sales and Service Ofﬁces Canada Sales and Service Ofﬁces Upgrading the HOP Controller ROM and Firmware ROM Upgrading the Hop Controller ROMSide View Figure A-4 Removing the A33 U62 HOP Controller ROM Figure A-3 Removing the A33 Hop Controller BoardUpgrading the Hop Controller ROM Upgrading the ﬁrmware