Veeco MPS-3000 CE, Technical Manual

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Detailed Command Description
Command Name: ATTENTION
Syntax: A<cr>
Units: N/A
Range: N/A
Description: This command places the power supply into Remote mode.
Command Name: SET ACCELERATOR TO BEAM CURRENT RATIO LIMIT
(A/B RATIO)
Syntax: AB[n]<cr>
Units: %
Range: n = 0 - 99
Description: This command sets the value for the accelerator current to
beam current ratio limit. If this limit is exceeded, an E25 error message
appears in the accelerator current display.
Set the A/B Ratio limit to 15% using the following command: AB15<cr>
Command Name: AUTO CATHODE MODE
Syntax: AC[N]<cr>
Units: N/A
Range: n = 0 or 1
Description: This command enables (AC1) or disables (AC0) the Auto
Cathode (AC) mode, which is active only when the power supply is in
Remote mode. However, the command will be accepted in any mode.
MPS-3000 CE FC/PBN:
When the AC mode is active, the cathode filament current increases
automatically until the cathode filament current has reached its limit, or
the discharge current has exceeded the discharge current threshold.
MPS-3000 CE HC:
When the Auto Cathode mode is active, the minimum discharge cur-
rent target is equal to the discharge current threshold. The value of the
AC command is stored in non-volatile RAM and stays in effect until it is
changed.
Disable the Auto Cathode mode using the following command: AC0<cr>
EXAMPLE 8.1 Set the
A/B Ratio Limit
EXAMPLE 8.2 Disable
the Auto Cathode Mode