Ametek 7280 Instruction Manual page 202

Appendix F, ALPHABETICAL LISTING OF COMMANDS
FSTEP[.] [n
FSTOP[.] [n]
GP [n
HC
ID
IE [n]
F-10
n ] Oscillator frequency sweep step size and type
1 2
The frequency may be swept either linearly or logarithmically, as specified by
parameter n . The step size is specified by parameter n
2
Log sweep n = 0
2
In fixed point mode, n
In floating point mode n
Linear sweep n = 1
2
In fixed point mode, n
In floating point mode n
Linear seek sweep n = 2
2
In fixed point mode, n
In floating point mode n
The seek sweep mode automatically stops when the signal magnitude exceeds
50% of full scale. This mode is most commonly used when setting up the virtual
reference mode.
Oscillator frequency sweep stop frequency
Sets the stop frequency for a subsequent sweep of the internal oscillator frequency,
in the range 0 to 2.000 MHz.
In fixed point mode, n is in millihertz and in floating point mode n is in hertz.
[n ]] Set/Read GPIB parameters
1 2
n sets the GPIB address in the range 0 to 31
1
n Terminator
2
0 [CR], test echo disabled
1 [CR], test echo enabled
2 [CR,LF], test echo disabled
3 [CR,LF], test echo enabled
4 no terminator, test echo disabled
5 no terminator, test echo enabled
Halt curve acquisition
Identification
Causes the lock-in amplifier to respond with the number 7280.
Reference channel source control (Internal/External)
n Selection
0 INT (internal)
1 EXT LOGIC (external rear panel TTL input)
2 EXT (external front panel analog input)
is the step size in thousandths of a percent.
1
is in percent. The range of n
1
is the step size in millihertz.
1
is in hertz. The range of n
1
is the step size in millihertz.
1
is in hertz. The range of n
1
.
1
is 0 to 100.00%
1
is 0 to 10 kHz
1
is 0 to 10 kHz
1