Agilent Technologies 8922 P manual Making measurements, Choosing which timeslot to measure

Page 33

Manual operation

Making measurements

Making measurements

Once a call is established, you can make measurements as before—see the HP/Agilent 8922 User’s Guide for more details. Note however that there are two new factors which you need to consider: choosing which timeslot to perform measurements on, and performing BER on the two- unit system.

Choosing which timeslot to measure

Any HSCSD instrument can measure the master or the slave timeslot. This selection is made on the HSCSD control screen, and the measurements on this screen include a reminder of which slot is currently being analysed. On other screens, where this reminder is not present, you must be aware of which slot you are measuring.

Measuring BER

To perform BER, one instrument starts a measurement, while the other makes the measurement. Specifically, to perform BER on the slave timeslot, you must start the BER measurement on the master unit because it is the master unit which performs the signalling to place the mobile in loopback mode. Once this is done, the BER measurement must be started on the slave unit, where it will then run as normal. After the measurement is complete, and the master unit is returned to a different screen, the HP/Agilent 8922 signals the mobile and takes it back out of loopback mode.

Changing band and making measurements in the E-GSM900 and DCS 1800 bands

Changing band and making measurements in the E-GSM900 and DCS1800 bands are performed in the same way as for the HP/Agilent 8922 Multi-Band System. See the HP/Agilent8922 Multi-Band Test System Supplementary User’s Guide for details.

Chapter 3

19

Image 33
Contents HP/Agilent 8922 GSM Hscsd Test System Option #K09 Warranty Limitation of Remedies and Liability Assistance Statement of Compliance Manufacturer’s Declaration Sound EmissionEarthing ground, incorporated in the power cord. The mains Instrument dangerous. Intentional interruption isProhibited 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 Making measurements Choosing which timeslot to measureMeasuring BER 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 Peak power display Mobile reportsTo Screen menu Fast BER screen Fast BER ScreenLoopback Remote operation Introduction Configure Subsystem Gpib Commands CONFigureINSTrumentTYPEConfigure Instrument Type comand syntax Display Subsystem Gpib Commands Display Screen command syntaxDISPlaySCReen Hscsd 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