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18 Chapter3
Manual operation
Establishing a call
Establishing a call
You establish a call in the same way as for a speech call.
Step 1. Ensure that the master timeslot is the timeslot currently being
measured on the master unit.
To do this, navigate to the HSCSD control screen on the master unit and
set the Measure field to Master. If you do not do this the HP/Agilent 8922
does not see the signalling from the mobile, and call set up fails.
Step 2. Configure the call by navigating to the HSCSD control screen on the
master unit, and setting Call Type as a 2x2 or 2x1 and Data Rate to 9.6
or 14.4 kbits/s as required.
Step 3. Connect the mobile to the RF IN/OUT port located on the front panel of
the master unit’s HP/Agilent 83220 (see the HP/Agilent 8922 Multi-
Band Test System Supplementary User’s Guide for more information
about this port).
Step 4. Switch on the mobile.
The mobile now camps onto the broadcast channel.
Step 5. Once the mobile is connected and successfully camped on to the master
unit, initiate the call from the mobile (for example, by pressing SEND on
the mobile, or by pressing ORG CALL on the HP/Agilent 8922 master
unit). The display on the HP/Agilent 8922 now shows that the call status
is CONNECTED.
If the call cannot be established, it may be because the uplink power may
differ from the HP/Agilent 8922’s expected input level. The most likely
reason for this type of problem is that the mobile or the IF Link cable has
not been calibrated. For details on calibrating the system “Calibrating
the overall system” on page 14.