IBM 7220, Instruction Manual

Page: 147 / 155

Default Settings
Appendix
F
F-1
Default Setting Function
The default setting function sets the model 7220’s controls and output displays as
follows:-
Left-hand LCD
Displays the AC Gain control on the upper line and the full-scale sensitivity control
on the lower line.
Right-hand LCD
Displays the magnitude as a percentage of full-scale output on the left-hand side and
the phase angle in degrees output on the right-hand side.
The ten controls accessed via the left-hand LCD are set to the following values:-
Full-scale sensitivity 500 mV
AC Gain 0 dB
Time constant 100 ms
Slope 12 dB/octave
Oscillator frequency 1000.000 Hz
Oscillator amplitude 0.500 mV rms
DAC1 output 0.000 V
DAC2 output 0.000 V
Output offsets OFF
Phase 0.00°
The two output offset controls accessed via the right-hand LCD are set as follows:-
X channel output offset 0.00 %
Y channel output offset 0.00 %
The remaining instrument controls, accessed via the setup menus, are set as follows:-
Input mode Single-ended voltage mode, A input connector
Coupling AC
Input connector shell Floating
Input device FET
Reference mode Internal
Reference harmonic 1st
Demodulator monitor Off
Output expansion Off
CH1 analog output X %
CH2 analog output Y %