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Appendix E, ALPHABETICAL LISTING OF COMMANDS
IE2 [n]
IMODE [n]
IPLOCK
IPUNLOCK
LEN [n]
LF [n
E-14
n
Selection
0
INT (internal)
1
EXT (external rear panel TTLREF IN input)
2
EXT (external front panel analog REF input)
Reference channel 2 source control, Dual Reference
In Dual Reference mode, the value of n sets the reference channel 1 source according
to the following table:
n
Selection
0
INT (internal)
1
EXT (external rear panel TTLREF IN input)
2
EXT (external front panel analog REF input)
This command is only valid in Dual Reference mode
Current/Voltage mode input selector
The value of n sets the input mode according to the following table
n
Input mode
0
Current mode off - voltage mode input enabled
1
High bandwidth current mode enabled - connect signal to B (I) input connector
2
Low noise current mode enabled - connect signal to B (I) input connector
If n = 0 then the input configuration is determined by the VMODE command.
If n > 0 then current mode is enabled irrespective of the VMODE setting.
Restrict Ethernet Access
When this command is sent via the Ethernet interface, subsequent connection
requests and hence commands will only be accepted if sent from the same IP address,
preventing unauthorized access to the instrument.
Remove Ethernet Access Restrictions
When this command is sent via the Ethernet interface, subsequent connection
requests and hence commands will be accepted from any computer on the same
network as the instrument.
Curve length control
The value of n sets the curve buffer length in effect for data acquisition. In fast curve
buffer mode the minimum is 300 and the maximum is 100,000; in standard mode it
depends on the number of curves requested using the CBD command, and a
parameter error results if the value given is too large. For this reason, in standard
mode if the number of points is to be increased and the number of curves to be stored
is to be reduced using the CBD command, then the CBD command should be issued
first.
n
]
Signal channel line frequency rejection filter control
1
2
The LF command sets the mode and frequency of the line frequency rejection
(notch) filter according to the following tables:
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