Chapter 6, COMPUTER OPERATION
6-16
FASTMODE [n] Output Filter Mode Control
The value of n sets the output filter mode control according to the following table:
n Function
0 Fast mode off
1 Fast mode on
When the fast analog output mode is turned off, the available output filter time
constant is restricted to 5 ms or greater, but all four filter slopes are available (i.e. 6,
12, 18 and 24 dB/octave). Conversely, when the mode is turned on, time constants
down to 10 µs can be selected, but the slope is limited to either 6 or 12 dB/octave.
6.7.05 Instrument Outputs
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.
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.
XY[.] X, Y channel outputs
This returns the X and Y outputs separated by the defined delimiter.
MAG[.] Magnitude
In fixed point mode causes the lock-in amplifier to respond with the magnitude value
in the range 0 to 30000, full-scale being 10000.
In floating point mode causes the lock-in amplifier to respond with the magnitude
value in the range +3.000E0 to +0.001E-9 volts or +3.000E-6 to +0.001E-15 amps.
PHA[.] Signal phase
In fixed point mode causes the lock-in amplifier to respond with the signal phase in
centidegrees, in the range ±18000.
In floating point mode causes the lock-in amplifier to respond with the signal phase
in degrees.
PHASEPOL [n] Signal phase polarity control
n Function
0 Operation is the same as earlier SIGNAL RECOVERY lock-in amplifiers, such
as the models 7220, 7225, 7265, 7265, 7280, 5209 and 5210.
1 Operation is the same as earlier versions of firmware in the models 7270,
7124 and 7230
MP[.] Magnitude, phase
This returns the MAG and PHA outputs separated by the defined delimiter.
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