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S:\HP83206A\USRGUIDE\MANUAL\trblesht.fm
Chapter 9, Troubleshooting
General Operating Reminders
To re-establish the DC Current zero point:
1. Disconnect any cables to the DC CURRENT MEASUREMENT connections on the
Test Set’s rear panel.
2. Select
AF ANL
from the To Screen menu to go to the AF ANALYZER screen.
3. Select the
DC Current [Zero]
field.
To re-establish the DCFM zero point:
1. Disconnect any signals to the Test Set’s front-panel AUDIO IN and RF IN/OUT ports.
2. Select
RF GEN
from the To Screen menu to go to the RF GENERATOR screen.
3. Set the
AFGen1 To
field to
FM
,
0.00
kHz.
4. Select the
FM Coupling
field to
DC
.
5. Select the
DC FM Zero
field.
Vocoder Selection
The Test Set does not contain its own vocoder, but it does support the use of the
VSELP and ACELP vocoders in mobiles. If you have a Test Set with a firmware
revision in the range of B.04.01 to B.05.00, you can only access the ACELP
selection using remote (HP-IB) operation (
CALLP:DCCH:VOC ‘ACELP’). For
firmware version B.05.01 and above, you can select both vocoders manually or
via HP-IB.
Setting the RF Generator Frequency and Amplitude Outside of the Call Control
Screens When Using a PCS Interface
It is possible to use other screens and control fields outside of the Call Control
screens when using the Cellular Adapter with a PCS Interface. When operating on
another screen (such as the DUPLEX TEST screen) you should reset the
Amplitude after changing the RF Gen Freq to ensure that the RF amplitude is
accurate. This operation is not required when setting the channel number on the
Call Control screens.