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4
Introduction to Programming
Position Indicator Verification
Many Agilent switches contain position indicator options that allow for
electronic verification of the switch position. The 34945EXT module contains
circuitry to detect these signals and the Y1156A verification board can be used
to test the functioning of this circuitry.
1
2
3
4
5
6
7
8
70
Turn off the channel drive (module configuration window) or turn off the
34980A.
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.
Turn on the 34980A (if turned off) and open the web interface. Select the
'Browser Web Control' page and select 'Allow Full Control'.
In the 'Browser Web Control' window, locate the bank and Y1156A
programming diagram. An example of the diagram is shown in Figure 4-9.
For this example, the 34945A is installed in 34980A slot 1.
From the bank configuration window, select '
(module configuration window) must be off before '
Open the 'SCPI Command Interface' window (Figure 4-9) and from the
window, send the commands:
ROUT:CHAN:VER:ENAB ON,(@1101:1118)
ROUT:CHAN:VER:POL INV,(@1101:1118)
ROUT:CHAN:DRIV:PULS:MODE OFF,(@1101:1118) !continuous drive
Create a verification sequence (see "Sequence Programming") that closes
and opens the desired channel(s). Enable the channel drive and execute the
sequence. With the polarity inverted (Step 6), closing the channel tests the
34945EXT circuitry receiving the position indication signal. An error
message will occur if the position sensed does not correspond to the
programmed state.
To verify other channels, modify the channel address in the sequence as
required and execute the sequence again. To test another bank, set the
source to "Off". Move the Y1156A to the bank and click the
Channel Drive
"Update View" button to refresh the Web page. Repeat steps 5-6 (with the
new bank address) and change the channel addresses in the sequence.
When finished, turn off the continuous current mode to prevent an
overcurrent condition on the power supply driving the 34945EXT.
Agilent 34945A Microwave Switch/Attenuator Driver Module User's Guide
Preset Bank
' (the channel drive
Preset Bank
' is active).
!enable verification
!invert the polarity
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