Ametek 7280 Instruction Manual page 125

Wide bandwidth dsp lock-in amplifier
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Output
Description
Title
Numeric Displays only:
R
%
Resultant (Magnitude) output, harmonic 1, %FS
1
R
%
Resultant (Magnitude) output, harmonic 2, %FS
2
N
%
Noise output about harmonic 1, % FS
1
N
%
Noise output about harmonic 2, % FS
2
θ
°
Phase output, harmonic 1, in degrees
1
θ
°
Phase output, harmonic 2, in degrees
2
X
%
X channel output, harmonic 1, % FS
1
X
%
X channel output, harmonic 2, % FS
2
Y
%
Y channel output, harmonic 1, % FS
1
Y
%
Y channel output, harmonic 2, % FS
2
Numeric Displays only: (continued)
R
Resultant (Magnitude) output, harmonic 1, in volts or amps
1
R
Resultant (Magnitude) output, harmonic 2, in volts or amps
2
Numeric and Bar-Graph Displays:
X
X channel output, harmonic 1, in volts or amps
1
X
X channel output, harmonic 2, in volts or amps
2
Y
Y channel output, harmonic 1, in volts or amps
1
Y
Y channel output, harmonic 2, in volts or amps
2
N
Noise output about harmonic 1 in volts or amps per root hertz
1
N
Noise output about harmonic 1 in volts or amps per root hertz
1
ADC1
ADC1 input, ±10.000 V full-scale
ADC2
ADC2 input, ±10.000 V full-scale
ADC3
ADC3 input, ±10.000 V full-scale
ADC4
ADC4 input, ±10.000 V full-scale
Bar-Graph Displays only:
MAG
Resultant (Magnitude) output, harmonic 1, in volts or amps
1
MAG
Resultant (Magnitude) output, harmonic 2, in volts or amps
2
PHA
°
Phase output, harmonic 1, in degrees
1
PHA
°
Phase output, harmonic 2, in degrees
2
Table 5-4, Output Display Choices - Dual Harmonic Mode
The additional outputs may be stored to the curve buffer, but only when the curve
selection is made via the computer interface. The Curve Select menu only allows
selection of the same sixteen data types as in single reference mode.
When in dual harmonic mode, the user-defined equations, specified on the Output
Equations menu, allow the selection of the additional outputs as variables. For
example, it is possible to calculate a value proportional to the ratio of the X
output to that of the X
2
the CH1 or CH2 connectors on the rear panel as an analog voltage.
Naturally, the two harmonics of the signal being measured share a common signal
Chapter 5, FRONT PANEL OPERATION
channel output. With suitable scaling, this can be output to
channel
1
5-79

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