TB 9-6625-2197-50
(e) CH2 VOLTS/DIV to 10 mV and Invert to On.
(3) Set control box PWR switch to ON.
NOTE
Do not set control box SEQ and RPT switches to TEST
position at same time. RPT will override SEQ switch.
NOTE
Figure 5, CONNECTION A, is
used to
measure SUM
pulses;
CONNECTION B is used to measure DIFF.
(4) Operation of the control box is described in (a) through (e) below:
(a) SEQ switch is momentarily set to GND until characters appear on some of
the displays, then immediately set switch to TEST.
(b) Mode of operation will be seen on the display and will change periodically.
(c) Set SEQ switch to OFF when desired mode of operation is viewed.
(d) Set RPT switch to GND until TI display is lit and immediately set switch to
TEST.
(e) Ensure desired mode of operation is viewed on TI display.
(5) Repeat (3) above to select MODE 1 operation.
(6) Adjust oscilloscope TRIGGER Level and INTENSITY controls as necessary to
(7) Set first pulse leading edge on second vertical graticule line.
NOTE
Pressing HORIZONTAL section, MAIN/DELAYED pushbutton on
oscilloscope will provide selectable menu of left or center time
reference.
NOTE
Press oscilloscope ERASE pushbutton
when
necessary
throughout this procedure.
If pulse width is not between 0.7 and 0.9 s,
(8) Measure SUM pulse width.
perform b (1) below.
(9) Measure SUM pulse spacing. Pulse spacing will be between 2.8 and 3.2 s.
12