TB 9-6625-2274-40
r. Press OUTPUT ON pushbutton off and remove oscilloscope connections. Connect
s. Adjust A8Rl300 (fig. l) for a multimeter indication of +2.73 V dc 0.03 V.
t. Remove multimeter positive lead and connect to A8TP1300 (fig. 1). Adjust A8Rl301
(fig. 1) for a multimeter indication of 0.000 V dc .003 V.
u. Press OUTPUT ON pushbutton off. Remove multimeter connections.
20. Low Edge Risetime
a. Connect OUTPUT to digitizing oscilloscope INPUT/TDR OUTPUT using X10
attenuator. Connect TRIGGER OUTPUT to digitizing oscilloscope TRIG.
b. Position controls as listed in (1) through (9) below:
(1) Press AMPLITUDE MODE AMPL MODE EDGE pushbutton.
(2) Press AMPLITUDE MODE EDGE POLARITY
pushbutton.
pushbutton to highlight 1 MHz.
(3) Press AMPLITUDE MODE FREQ
p
(4) Press AMPLITUDE MODE NUMBER OF DIV (MULTIPLIER)
ushbutton to display X 1 DIV.
(5) Press TRIGGER ON pushbutton on.
(6) Press TRIGGER NORM pushbutton on.
(7) Adjust UNITS/DIV dial to display 1 V/D.
(8) Press VARIABLE ON pushbutton off.
(9) Press OUTPUT ON pushbutton on.
c. Acquire signal. Set digitizing oscilloscope probe attenuation to 10 and set sweep
speed to 2 ns/D.
d. Perform risetime measurement technique using digitizing oscilloscope. Adjust
A7C1621 (fig. 1) until digitizing oscilloscope indicates a risetime less than 1.3 ns and
minimum aberrations (R).
e. Press OUTPUT ON pushbutton off and remove digitizing oscilloscope connections.
21. Mid and High Edge Offset
a. Connect TI output to oscilloscope Vertical 1 input.
b. Position controls as listed in (l) through (7) below:
(1) Press AMPLITUDE MODE AMPL MODE EDGE pushbutton.
pushbutton to highlight 1 kHz.
(2) Press AMPLITUDE MODE FREQ
p
(3) Press AMPLITUDE MODE NUMBER OF DIV (MULTIPLIER)
ushbutton to display X 8 DIV.
pushbutton.
(4) Press AMPLITUDE MODE EDGE POLARITY
(5) Press VARIABLE ON pushbutton off.