Instrument Outputs - Ametek 7270 Instruction Manual

Chapter 6, COMPUTER OPERATION

6.7.05 Instrument Outputs

X[.]
Y[.]
XY[.]
MAG[.]
PHA[.]
PHASEPOL [n]
MP[.]
RT[.]
6-18
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 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.
X, Y channel outputs
Equivalent to the compound command X[.];Y[.]
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.
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.
Signal phase polarity control
This command sets the measurement mode for responses to the PHA[.] command,
according to the following table:
n Function
Operation is the same as earlier SIGNAL RECOVERY lock-in amplifiers, such
0
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
Magnitude, phase
Equivalent to the compound command MAG[.];PHA[.]
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.