Agilent Technologies 83236B, Руководство по эксплуатации, Страница: 81 / 164

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Chapter 3, Programming the PCS Interface using GPIB Control
Set Up and Measure
Set the Test
Frequencies and
Levels (for RX or
TX testing)
Set the generator frequency for receiver testing
The PCS Interface takes the source signal from the Test Set’s DUPLEX OUT port
and routes the signal to the UUT port RF OUT only (or RF IN/OUT). Based on
the frequency requested at the UUT port, the PCS Interface automatically
determines if the upconversion or bypass path is used.
1. Use the following command string to indicate the desired testing frequency at the UUT
port and to query the PCS Interface for the corresponding frequency needed at the its
FROM DUPLEX OUT port.
To the PCS Interface> RX:TSET:FREQ? <desired frequency>
( page 111 )
2. Define a local constant for the frequency obtained in step 1.
For example: Duplex_freq
3. Use the following command string to set the Test Set’s DUPLEX OUT frequency.
To the Test Set> RFG:FREQ <Duplex_freq>
NOTE: Table 14 on page 138 describes the frequency conversions automatically made by the PCS
Interface.
Set the generator level for receiver testing
The PCS Interface is designed to optimize the level accuracy of the generator’s
output. It automatically computes the optimum signal level to set the Test Set’s
DUPLEX OUT port to in order to obtain the desired signal level at the PCS
Interface’s UUT port.
NOTE: Refer to the specifications for the output levels available from both the RF OUT only and
RF IN/OUT ports.
1. Use the following command string to indicate the signal level desired at the PCS
Interface’s UUT port and to query the PCS Interface for the corresponding signal level
needed at its FROM DUPLEX OUT port.
To the PCS Interface> RX:TSET:LEV? <desired level>
( page 112 )
2. Define a local constant for the signal level obtained in step 1.
For example: Duplex_lev
3. Use the following command string to set the Test Set’s DUPLEX OUT level.
To the Test Set> RFG:AMPL <Duplex_lev>