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VM3608A/3616A Command Dictionary
93
SCAN
Purpose
Enables/disables the operation of the scan list operation for the specified channels
Type
Setting
Command Syntax
SCAN <mode>,<channel_list>
Command Parameters
<mode>
= 0 | OFF |1 | ON | LOOP | FIFO | ARBitrary
<channel_list> = A list of DAC channels in channel list format
*RST Value
0
Query Syntax
SCAN? <channel>
Query Parameters
<channel> = channel number 1 - 16 or 1 - 8, specifying a specific DAC
Query Response
<mode> = 0 | 1 | LOOP | FIFO | ARB
Description
The Scan command enables or disables the operation of the scan list operation for the
specified channels. For each channel that is enabled, the interrupt routine will load a voltage
from its respective scan list arrays at the current array position to the DAC and auto increment
the scan list array pointer. If the array pointer equals the limit, then the scan function for that
channel will stop, unless the mode of that channel is set to LOOP. LOOP mode means the
scan function will reset the array pointer to 0 and continue. When the scan mode is to be
enabled, the trigger source of either EXTernal or one of the TTLTriggers is required to be
selected first. In ARBitrary mode, the TRIGger:IMMediate:ADVance must also be set.
Note:
Legal transitions of SCAN modes are:
OFF
ON
OFF
FIFO
ON
OFF
FIFO
OFF
OFF
LOOP
OFF
ARB
LOOP
OFF
ARB
OFF
Example illegal transitions of SCAN modes are:
LOOP
ON
ON
FIFO
ARB
LOOP
The channel’s Scan mode setting must pass through the OFF setting first before being set to
any other mode. Scan modes OFF, ON, and LOOP may be simultaneously assigned to
different channels. The FIFO and ARB modes may not be simultaneously assigned with any
other modes other than OFF.
NOTE:
In FIFO and ARB mode, DACs in the OFF mode cannot be changed. If they need to
be changed, all DACs must first be removed from FIFO and ARB mode. For example:
Channels 1 and 4 may be set to ARB while the rest are OFF; or Channels 1 through 6 may be
set to FIFO while the rest are OFF.
The SCAN OFF command is useful as it sets all channel modes OFF simultaneously so that
they may be reassigned.
Examples
Command / Query
Response
(Description)
SCAN ON,(@1:4)
SCAN? 2
1
Related Commands
SCAN:LIMit <channel>,<count>, SCAN:TABLe <channel>,<voltage list>, SCAN OFF
Summary of Contents for VM3608A
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Page 6: ...VTI Instruments Corp 6 VM3608A 3616A Preface ...
Page 12: ...VTI Instruments Corp 12 VM3608A 3616A Preface ...
Page 18: ...VTI Instruments Corp 18 VM3608A 3616A Introduction ...
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