Appendix E, ALPHABETICAL LISTING OF COMMANDS
E-19
REFN [n] Reference harmonic mode control
The value of n sets the reference channel to one of the NF modes, or restores it to the
default 1F mode. The value of n is in the range 1 to 127.
REFP[.] [n] Reference phase control
In fixed point mode n sets the phase in millidegrees in the range ±360000.
In floating point mode n sets the phase in degrees.
REMOTE [n] Remote only (front panel lock-out) control
Allowed values of n are 0 and 1. When n is equal to 1, the lock-in amplifier enters
remote only mode in which the front panel control functions are inoperative and the
instrument can only be controlled with the RS232, USB or Ethernet interfaces. When
n is equal to 0, the front panel controls function normally.
RS [n
1
[n
2
]] Set/read RS232 interface parameters
n
1
Baud rate (bits per second) n
1
Baud rate (bits per second)
0 75 7 1800
1 110 8 2000
2 134.5 9 2400
3 150 10 4800
4 300 11 9600
5 600 12 19200
6 1200 13 38400
The lowest five bits in n
2
control the other RS232 parameters according to the
following table:
bit number bit negated bit asserted
0 data = 7 bits data = 8 bits
1 no parity bit 1 parity bit
2 even parity odd parity
3 echo disabled echo enabled
4 prompt disabled prompt enabled
RSADDR [n] Set/read RS232 address
The value of n sets the RS232 address in the range 0 to 15. This is relevant only
when using more than one instrument connected via the RS232 “daisy-chain”
method. Each instrument must be set to a unique address.
RT[.] Ratio output
In integer mode the RT command reports a number equivalent to 1000×X/ADC1
where X is the value that would be returned by the X command and ADC1 is the
value that would be returned by the ADC1 command.
In floating point mode the RT. command reports a number equivalent to X/ADC1.
SEN [n]
SEN. Full-scale sensitivity control
The value of n sets the full-scale sensitivity according to the following table,
depending on the setting of the IMODE control:
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