Introduction to Programming
4
Agilent 34945A Microwave Switch/Attenuator Driver Module User’s Guide
67
If sent individually they would appear as:
ROUT:CHAN:LAB "SW 1",(@2121)
ROUT:CHAN:DRIV:PAIR:MODE ON,(@2121)
ROUT:CHAN:VER:ENAB ON,(@2121)
ROUT:CHAN:VER:POL NORM,(@2121)
ROUT:CHAN:DRIV:TIME:REC 0.0,(@2121)
ROUT:CHAN:DRIV:TIME:SETT 0.015,(@2121)
ROUT:CHAN:DRIV:PULS:MODE ON,(@2121)
ROUT:CHAN:DRIV:PULS:WIDTH 0.015,(@2121)
ROUT:CHAN:DRIV:OPEN:DEF (@2121)
Again, even though only one parameter (one command) was changed, each of
the commands in the string above is sent to the instrument.
System Verification
The most common defects associated with switches and attenuators connected
to the 34945EXT through the Y1150A - Y1155A distribution boards are related
to switch/attenuator cables.
The optional Y1156A Verification Board is used to provide visual confirmation
of the signal path from the PC to distribution board banks 1-4 on the
34945EXT module. Verifying the signal to a selected bank can help isolate
suspected problems in the path from the PC to the switch. The diagnostic
board also verifies functioning of the electronic position indicator circuitry
within the 34945EXT relative to position indicator signals received from the
switch.
To begin using the 34945A Microwave Switch/Attenuator Driver as quickly as
possible or to minimize troubleshooting, it is highly recommended that the
path to each 34945EXT bank be verified prior to installing the distribution
board and any switches or attenuators.
Running the Verification Sequence
The verification sequence is executed from the 34945A Web interface. As
mentioned in Chapter 3, the 34945A must be connected to the PC through one
of the LAN configurations shown in Figure 2-1. The Web interface
is
not
available from the GPIB or USB interface. To use the Verification Board:
1
Turn off the 34980A.
2
Install the verification board in bank 1 (or the desired bank) of the
34945EXT. Securely fasten the verification board within the bank using the
terminal screws.
