TB 9-6625-1966-24
(8) Set TI + INPUT PHASE switch to - (negative). Function generator output cycle
will begin on negative slope of calibrator waveform.
(9) Vary TI START/STOP PHASE dial between -90 and +90 and observe that
function generator output changes from -90 to +90.
(10) Set TI MODE switch to MULTIPLE. The function generator output will
appear on oscilloscope only during negative portion of the calibrator output. The last cycle
of function generator output will be completed during positive portion of calibrator output.
(11) Set TI + INPUT PHASE -switch to + (positive). Oscilloscope presentation will
be as in (10) above except in reverse polarity.
(12) Disconnect calibrator from TI and set oscilloscope MODE switch to CH 1.
(13) Position controls as listed in (a) through (c) below:
(a) EXTERNAL MANUAL switch to MANUAL.
(b) MODE switch to SINGLE.
(c) START/STOP PHASE control centered.
(14) Set oscilloscope coupling switch to DC.
(16) Press TI MANUAL TRIGGER pushbutton and observe that oscilloscope trace
moves in vertical axis, starting and stopping at the same place.
(17) Set TI MODE switch to MULTIPLE and press MANUAL TRIGGER
pushbutton. Observe that trace moves in a vertical axis until MANUAL TRIGGER
pushbutton is released.
b. Adjustments. No adjustments can be made.
20. Trigger Amplitude
a. Performance Check
(1) Connect calibrator to TI INPUT.
(2) Connect function generator CHANNEL B OUTPUT to oscilloscope vertical CH 1.
(3) Position controls as listed in (a) through (c) below:
(a) MODE switch to MULTIPLE.
(b) + INPUT PHASE - switch to + (positive).
(c) EXTERNAL MANUAL switch to EXTERNAL.