TB 9-6625-132-24
(9) Set TI AMPL for minimum output.
b. Adjustments.
(1) Connect TI OUTPUT to oscilloscope CHANNEL 1 set for 50 Ω input impedance.
(2) Set TI controls as indicated in (a) through (i) below.
(a) FREQUENCY Hz
20
103
(b) MULTIPLIER
(c) FREQUENCY VERNIER
fully CW
(d) Waveform pushbutton
(Triangle)
(e) VAR SYMM
off
(f) FREE RUN
in
(g) ATTENUATOR
0 dB
(h) AMPL (variable)
fully CW
(i) OFFSET
off
(3) Adjust oscilloscope vertical polarity to GND and adjust the position control until the
trace lines up on the center horizontal graticule line.
(4) Change oscilloscope vertical input polarity to negative (-).
(5) Adjust oscilloscope vertical position control until the negative peak of the trace lines
up on the center horizontal graticule line.
(6) Press the TI waveform (Sine) pushbutton in.
(7) Adjust potentiometer R1106 located on the Aux board until the negative peak of the
displayed waveform is on the center horizontal graticule line. (R)
(8) Press the TI waveform (Square) pushbutton in and note the position of the negative
level of the displayed squarewave for use in step (13) below.
(9) Press the TI waveform (Triangle) pushbutton in
(10)Change oscilloscope vertical input polarity to positive (+).
(11)Adjust oscilloscope vertical position control until the positive peak of the trace lines
up on the center horizontal graticule line.
(12)Press the TI waveform (Square) pushbutton in.
(13)Adjust potentiometer R1728 located on the main board as shown in figure 1 below
until the positive level of the displayed squarewave is off of the center horizontal graticule line in
the same direction and the same amount as the Squarewave noted in step (8) above. (R)
7