89
3.5 Select the
Mode
option to select from
Xmitter Sim
,
mA Source
or
V Source
options. Use the soft
keys to move cursor
Up
or
Down
, to
Select
the desired option and to go
Back
to the VMA Main Setup
Display.
3.6 From the VMA Main Setup Screen, select
Start
3.7 The user will be prompted to enter the starting value with the following screen. Use the soft keys to
enter the desired value.
Inc
– Increases the value shown above the cursor
Dec
– Decreases the value shown above the cursor
Next
– moves cursor to the right; eventually wraps back to left position
Done
– Ends data entry session and proceeds with the selected operation
3.8 Once the value is entered, press the
Done
soft key to initiate the selected operation.
The operation depicted below is for mA Source. Use the soft keys to change the output value as desired.
Note that the MFT base unit’s IV (current/voltage) meter reading is shown on this display for use in
applications requiring both sourcing and measurement. The IV line can be changed at this display from V
to mA to off by using the MFTs “Function” and “Units mA / V” keys as usual (see the MFT User’s Manual
section on Changing Units for more information).
Inc
– Increases the current value by the Step Value (entered in the VMA Main Setup Display).
Dec
– Decreases the current value by the Step Value (entered in the VMA Main Setup Display).
Chng
– Allows the user to enter another value.
Exit
– Ends simulation mode, returns to the VMA Main Setup Display.
4.0 Automated Operation – Source and Simulation
The VMA has features that allow step functions that can be utilized in the source/simulation options. The
standard steps programmed by the user are stored for future recall and use.
4.1 Refer to Diagrams 3.1 and 3.2 and make connections for the desired application.
4.2 From the VMA Main Setup Menu, arrow down and select
Auto-Step X.
Vma Settings
Current Settings
Enter Output Value
_ 0.000
Inc Dec Next Done
mA Source
Output = 16.000 mA
IV = 16.015 mA
Inc Dec Chng Exit
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