Ametek 7270 Instruction Manual page 217

VER Report firmware version
Causes the lock-in amplifier to respond with the firmware version number, as also
displayed on the Configuration menu.
VMODE [n] Voltage input configuration
The value of n sets up the input configuration according to the following table:
n Input configuration
0 Both inputs grounded (test mode)
1 A input only
2 -B input only
3 A-B differential mode
Note that the IMODE command takes precedence over the VMODE command.
VRLOCK [n] Virtual reference mode lock
The Seek option of the frequency sweep mode must be used before issuing this
command, for which the value of n has the following significance:
n Mode
0 Disables virtual reference mode
1 Enters virtual reference mode by enabling tracking of the signal frequency
X[.] X channel output
In fixed point mode causes the lock-in amplifier to respond with the X demodulator
output in the range ±30000, full-scale being ±10000.
In floating point mode causes the lock-in amplifier to respond with the X
demodulator output in volts or amps.
XOF [n [n ]] X channel output offset control
1 2
n Selection
1
0 Disables offset
1 Enables offset facility
The range of n is ±30000 corresponding to ±300% full-scale.
2
XY[.] X, Y channel outputs
Equivalent to the compound command X[.];Y[.]
Y[.] Y channel output
In fixed point mode causes the lock-in amplifier to respond with the Y demodulator
output in the range ±30000, full-scale being ±10000.
In floating point mode causes the lock-in amplifier to respond with the Y
demodulator output in volts or amps.
YOF [n [n ]] Y channel output offset control
1 2
n Selection
1
0 Disables offset facility
1 Enables offset facility
The range of n is ±30000 corresponding to ±300% full-scale
2
Appendix E, ALPHABETICAL LISTING OF COMMANDS
E-25