TB 9-6625-2072-24
a. Install TI and dual time base into oscilloscope vertical and horizontal compartments,
using plug-in extender for TI.
b. Remove oscilloscope side covers.
c. Connect oscilloscope to autotransformer. Connect autotransformer to a 115 V ac
source and adjust for a 115 V ac output.
d. Set oscilloscope ON-OFF switch to ON and allow at least 15 minutes for warm-up.
e. Position controls as listed in (1) through (5) below:
(1) A and B VOLTS/DIV switches to .005 and VERNIER controls to CAL.
(2) A and B AC/GND/DC switches to AC.
(3) DISPLAY switch to A.
(4) A and B POLARITY switches to + UP.
(5) MAGNIFIER switch to X5 (not on all models).
f. Position oscilloscope controls as listed in (1) through (4) below:
(1) HORIZONTAL DISPLAY switch to INT.
(2) HORIZONTAL AC/DC coupling switch to AC.
(3) PHASE/BANDWIDTH switch (fig. 1) to BANDWIDTH.
(4) HORIZONTAL MAGNIFIER switch to X1.
g. Position dual time base controls as listed in (1) through (7) below:
(1) TIME/DIV sweep display (center) switch to MAIN.
(2) MAIN TIME/DIV switch to 1 ms.
(3) DELAYED TIME/DIV switch to OFF.
(4) MAIN and DELAYED coupling ASC/ACF/AC/DC switches to ACS.
(5) MAIN and DELAYED VERNIER controls to CAL.
(6) MAIN and DELAYED SLOPE switches to +.
(7) MAIN and DELAYED trigger source switches to INT.
16. Gain and Attenuator Accuracy
a. Performance Check
NOTE
Do not perform (2), (3), and (5) below for model 1801A.
(1) Connect oscilloscope calibrator SOURCE/MEASURE CHAN 1 to TI A INPUT.
(2) Set oscilloscope calibrator for a VOLTAGE output of 5 mV at 1 kHz. If
oscilloscope does not display 5 divisions of vertical deflection, within 3 percent as indicated
