TB 9-6625-2072-24
A and B POLARITY switches to + UP.
(3)
A VOLTS/DIV switch to 2.
(4)
B VOLTS/DIV switch to .1.
(5)
A and B VOLTS/DIV vernier control to CAL.
(6)
Channel A AC/GND/DC switch to AC and channel B AC/GND/DC switch to GND.
(7)
MAGNIFIER switch to X1 (not on all models).
(8)
e. Position dual time base controls as listed in (1) through (11) below:
MAIN and DELAYED VERNIER controls to CAL.
(1)
TIME/DIV sweep display (center) switch to MAIN.
(2)
MAIN TIME/DIV switch to .1 s.
(3)
DELAYED TIME/DIV switch to OFF.
(4)
MAIN and DELAYED TRIGGER LEVEL controls to 0.
(5)
SWEEP MODE switch to AUTO.
(6)
MAIN EXT 10/EXT/INT/LINE switch to INT.
(7)
DELAYED INT/AUTO/EXT/EXT 10 switch to AUTO.
(8)
DELAY (DIV) control to 0.
(9)
MAIN and DELAYED SLOPE switches to +.
(10)
MAIN and DELAYED ACS/ACF/AC/DC switches to AC.
(11)
f. Connect TI to autotransformer. Connect autotransformer to a 115 V ac source and
adjust for a 115 V ac output.
g. Set TI ON-OFF switch to ON and allow at least 15 minutes for warm-up.
h. Adjust INTENSITY, HORIZONTAL, and VERTICAL controls for display (spot)
centered on TI.
i. Set HORIZONTAL DISPLAY control to EXT CAL. If display (spot) on TI is not
centered, adjust R207 (R14 for models 180C and D) (fig. 1) to center display (spot) at center
of graticule.
8. Calibrator Output and Stability
a. Performance Check
(1) Connect CALIBRATOR 10 V output to EXT INPUT.
(2) Adjust HORIZONTAL DISPLAY and POSITION controls for 9 divisions of
horizontal deflection on TI.
(3) Disconnect CALIBRATOR 10 V output from EXT INPUT and connect
oscilloscope calibrator SOURCE/MEASURE CHAN 1 to TI EXT INPUT.
(4) Set oscilloscope calibrator for 10 V output at 1 kHz. Rotate oscilloscope
calibrator knob located below EDIT FIELD button to adjust for 9 divisions of horizontal
deflection on TI. Oscilloscope calibrator err readout will indicate within 1 percent.