Chapter 5, FRONT PANEL OPERATION
5-81
any value between 0.001 Hz and 250.0 kHz with a 1 mHz resolution. Adjustment is
faster using the Keypad or Active Cursor controls - see section 4.1.04.
OSC AMPLITUDE
This control sets the amplitude of the signal at the 7270’s instrument OSC OUT
connector to any value between 1 µV and 5 V rms. Adjustment is faster using the
Keypad or Active Cursor controls - see section 4.1.04.
Since the instrument is now generating two sets of outputs (one for each harmonic of
the reference) there are more output display choices in this mode than in single
reference mode, and these are listed in table 5-4. The outputs corresponding to the
two harmonics are identified by the suffices "1" and "2" respectively.
Output Description
Numeric Displays only:
R1% Resultant (Magnitude) output, harmonic 1, %FS
R2% Resultant (Magnitude) output, harmonic 2, %FS
N1% Noise output about harmonic 1, % FS
N2% Noise output about harmonic 2, % FS
1° Phase output, harmonic 1, in degrees
2° Phase output, harmonic 2, in degrees
X1% X channel output, harmonic 1, % FS
X2% X channel output, harmonic 2, % FS
Y1% Y channel output, harmonic 1, % FS
Y2% Y channel output, harmonic 2, % FS
R1 Resultant (Magnitude) output, harmonic 1, in volts or amps
R2 Resultant (Magnitude) output, harmonic 2, in volts or amps
Output Description
Numeric and Bar-Graph Displays:
X1 X channel output, harmonic 1, in volts or amps
X2 X channel output, harmonic 2, in volts or amps
Y1 Y channel output, harmonic 1, in volts or amps
Y2 Y channel output, harmonic 2, in volts or amps
N1 Noise output about harmonic 1 in volts or amps per root hertz
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:
MAG1 Resultant (Magnitude) output, harmonic 1, in volts or amps
MAG2 Resultant (Magnitude) output, harmonic 2, in volts or amps
PHA1° Phase output, harmonic 1, in degrees
PHA2° Phase output, harmonic 2, in degrees
Table 5-4, Output Display Choices - Dual Harmonic Mode
The additional outputs may be stored to the curve buffer.
When in dual harmonic mode, the user-defined equations, specified on the Output
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