255
Chapter 9, Troubleshooting
General Operating Reminders
T
rouble
s
ho
oting
Making Handoffs
To make a handoff from a DTC or AVC to another channel, you must first set the
T
raffic Channel Assignment
fields to indicate the channel you want the
mobile to go to. You must then select the
Handoff
field to initiate the handoff.
Making Accurate Power Measurements
The Average Power and TX Power (Avg) measurements should be periodically
calibrated during operation by selecting the
Power Meter [Zero]
field on the
DCCH CALL CONFIGURE screen.
The relative TX Power [dB] measurement needs to be re-calibrated any time new
firmware is installed and anytime the Cellular Adapter is removed and reinstalled.
See
“Power Measurements” on page 130
See also
“To Recalibrate Relative TX
Power” on page 287
.
To Access the DCCH Call Processing Screens via HP-IB
Use the same command to access the CALL CONTROL screen that you would
use for AMPS operation:
DISP ACNT
. Then set the system type to DCCH with the
CALLP:CSYS ‘DCCH
command.
To Display Measurements on the Call Control Screen
The
Connect
annunciator must be “lit” before measurements can be displayed on
the CALL CONTROL screen. To make measurements without having a
connected call, such as when operating the mobile in its test mode, go to the
DIGITAL MEASUREMENTS screen.
Recalibrate After Changing Cellular Adapters
Any time a Cellular Adapter is used with a different Test Set, the PER_CALD
calibration routine must be run to calibrate the two instruments. See
“I/Q
Modulator and Relative TX Power Calibration” on page 287
Restoring Temporary Calibration Factors After a Firmware Upgrade
If you requested and received a firmware upgrade for your Test Set, you need to
restore the calibration factors used for three functions: TX Power measurements,
DC Current measurements, and DC FM offset.
To re-establish the TX Power zero point:
1. Disconnect any signals to the RF IN/OUT port on the Test Set.
2. Press the TX key to access the TX TEST screen.
3. Select the
TX Pwr Zero
field.
Summary of Contents for 83206A
Page 24: ...Contents 24 RAND_U 242 1 of N 242 ...
Page 29: ...Contents 29 Table of Contents Glossary 291 ...
Page 30: ...Contents 30 Index 299 ...
Page 146: ...146 S HP83206A USRGUIDE MANUAL meas fm Chapter 4 Making Measurements WER DTC or DCCH ...
Page 172: ...172 S HP83206A USRGUIDE MANUAL hpib fm Chapter 6 HP IB Syntax Diagrams DCCH DCCH ...
Page 173: ...173 Chapter 6 HP IB Syntax Diagrams DCCH HP IB Syntax Diagrams ...
Page 174: ...174 S HP83206A USRGUIDE MANUAL hpib fm Chapter 6 HP IB Syntax Diagrams DCCH ...
Page 177: ...177 Chapter 6 HP IB Syntax Diagrams DCCH HP IB Syntax Diagrams ...
Page 178: ...178 S HP83206A USRGUIDE MANUAL hpib fm Chapter 6 HP IB Syntax Diagrams DCCH ...
Page 179: ...179 Chapter 6 HP IB Syntax Diagrams DCCH HP IB Syntax Diagrams ...
Page 180: ...180 S HP83206A USRGUIDE MANUAL hpib fm Chapter 6 HP IB Syntax Diagrams DCCH ...
Page 181: ...181 Chapter 6 HP IB Syntax Diagrams DCCH HP IB Syntax Diagrams ...
Page 182: ...182 S HP83206A USRGUIDE MANUAL hpib fm Chapter 6 HP IB Syntax Diagrams DCCH ...
Page 183: ...183 Chapter 6 HP IB Syntax Diagrams DCCH HP IB Syntax Diagrams ...
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Page 194: ...194 S HP83206A USRGUIDE MANUAL hpib fm Chapter 6 HP IB Syntax Diagrams Meas ...
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Page 203: ...203 Chapter 6 HP IB Syntax Diagrams Number Measurement Syntax HP IB Syntax Diagrams ...
Page 264: ...264 S HP83206A USRGUIDE MANUAL trblesht fm Chapter 9 Troubleshooting Messages ...
Page 312: ...Index 312 ...