Agilent Technologies Cell Phone S GSM Manuale Utente Pagina 172
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Screens
Measurement Sync
8. Demod Arm This field arms or disarms triggering for digital demodulation. It is identical to the
Demod Arm State field on the Digital Demod screen.
IMPORTANT This field is set to Disarm whenever a measurement screen (Output RF Spectrum,
Phase/Frequency or Pulse) is accessed. When Demod Arm is disarmed, the
Agilent 8922M/S cannot display information about the uplink. When Demod Arm is
re-armed, the Cell Control fields that display information about the uplink will
resume normal operation.
When Demod Arm is re-armed, measurement results (DSP Analyzer, Output RF
Spectrum, Pulse) are lost.
9. First Bit This field displays the position in time of the of the burst’s first useful bit relative to
the delayed measurement trigger.
See Also Keys: ON/OFF, HI LIMIT, LO LIMIT, REF SET, AVG, Units
10. FM ErrCount This field displays the number of bit differences detected when comparing the
demodulated data bits to the selected synchronization pattern when Sync Mode is
set to Midamble. This field will display 0 if Sync Mode is set to Amplitude.
See Also Screens: MEAS SYNC
11. Hopped TCH
ARFCN Cntl
This field is used to determine the Agilent 8922M/S’s method for selecting which
ARFCN to measure during a hopping TCH.
The frequency of the ARFCN selected in this field is displayed in the HopMeasFreq
field on the RF Generator/RF Analyzer screen.
Choices Auto causes the Agilent 8922M/S to make a measurement on the
lowest ARFCN in the hop sequence and display it in the ARFCN
field.
Specific requires that you enter an ARFCN in the field that appears
when Specific is chosen. Make sure this ARFCN is in an MA table
and the CA table (see Screens: Cell Configuration). If the specified
ARFCN is not in the MA table, no measurement triggers will be
generated and the Agilent 8922M/S will wait until the
measurement is disarmed.
12. Midamble This field displays the midamble bit pattern of the Burst Type selected for bursts
other than user defined bursts.
- User’s Guide 1
- Contents 3
- Warranty 9
- Limitation of Warranty 9
- Certification 10
- Assistance 10
- Restricted Rights Legend 11
- Statement of Compliance 11
- Sound Emission 12
- Herstellerbescheinigung 12
- Declaration of Conformity 13
- Safety Information 14
- Safety Symbols 16
- Sales and Service Offices 17
- Latin America: 18
- United States: 18
- Description 19
- Typeface Conventions 20
- Using this Chapter 22
- Fuses and Power Cords 23
- Power Cords 24
- Installation Overview 25
- General Information 28
- Making Measurements 29
- Using This Chapter 30
- ACTIVE CELL 33
- SHIFT CELL CONFIG 35
- CELL CNTL ORG CALL 35
- TEST MODE 37
- ORG CALL END CALL 39
- CW GENERATOR 40
- Measurements 41
- CELL CNTL 42
- -27.5 dB -32 dB -51 dB -70 dB 51
- Figure 2-16 59
- MEAS SYNC 60
- Trigger Range For Pulsed RF 61
- SHIFT CELL CNTL 65
- Advanced Features 67
- TION=9C hex (Bit 0 - 157) 70
- About This Chapter 77
- Setting up the Tests 78
- Getting the Right Equipment 79
- Understanding the Tests 82
- Understanding Test Failures 88
- Accuracy (dB) 94
- Power (dBm) 94
- Verifying Performance 106
- Field Types 108
- Bit Error 114
- Bit Error 2 117
- Cell Configuration - GSM 900 122
- Cell Control - Active Cell 133
- 27.9 to +41.0 dBm 135
- Cell Control - Active Cell + 137
- Cell Control - Test Mode 139
- Cell Control - CW Generator 141
- Cell Control 2 143
- RCV CALL 145
- Configure 155
- CW Measurement 160
- Fast Bit Error 162
- I/O Configuration 165
- Measurement Sync 170
- MS Information / Signaling 176
- Oscilloscope, Main Controls 181
- Oscilloscope, Marker Controls 186
- Phase/Freq, Phase Err 197
- Phase/Freq, Data Bits 199
- Pwr Ramp: Rise Edge 201
- Pwr Ramp, Top 2 dB 203
- Pwr Ramp, Fall Edge 205
- Pwr Ramp: Summary 207
- To escape, press 224
- SMS Cell Broadcast 225
- Function Keys 239
- INCR SET 242
- ORG CALL 242
- SHIFT INCR÷10 244
- SHIFT RECALL 245
- Local Keys 246
- Global Keys 247
- Units Keys 248
- Connectors 249
- Timing Diagrams 275
- Messages 285
- Communication Failures 286
- Firmware Error 287
- Sync Status 288
- Protocol Error Messages 289
- Disconnects 292
- Instrument BASIC 297
- Overview 298
- Loading, Storing, and Running 306
- LOCAL SHIFT CANCEL 307
- SHIFT CANCEL 311
- Entering and Editing Programs 312
- Memory Cards 316
- 1 ! FM_TESTS 340
- APPENDIX A 341
- Equipment Required 343
- Agilent 8922M 344
- HP/Agilent 37900D 344
- How to Obtain a Protocol Log 348
- Signal OK 349
- Additional Information 351
- Glossary 365
- Index-10 380
- Index-11 381
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