Tektronix PG 501 Instruction Manual page 25

Set PULSE
DURATION
selector to .1 ms, PERIOD
selector to
.2 ms, and
+OUTPUT
AMPLITUDE
control fully cw . (Check
that the
VARIABLE
controls are at X1 .)
NOTE
Perform steps 5 & 6 only if
output amplifier transistor
0140 and 0180 have bee
replaced
or if it is sus
petted that output pul
aberrations are excessive.
ADJUSTMENT PROCEDURE
Internal Amplitude Moni-
tor Switch (see text)
NOTE
Read
information
under
Adjustment Procedure on
page
3-1 before
pro-
ceeding .
Adjust R1i4 (+ Amplitude
Set) for a + pulse ampli-
tude of 5.2 V .
Monitor the + pulse output
with the Real-Time'Oscillo-
Monitor the -
output
scope. Adjust R23 (Period
pulse with the Real-Time
Set) for a + pulse period of
Oscilloscope . Adjust R154
0.2 ms and R90 (Duration
(- Amplitude Set" for a -
Setj for a + pulse duration
pulse amplitude of 5.2 V.
of 0.1 ms .
`~"
o`
`~ ~
CU
U
n
R 154 C 143
o
o
, 0
~-
k"
, ._C183
Monitor the + output pulse
through the 10X Attenu-
ator
with the
Sampling
Oscilloscope . Adjust the +
OUTPUT
AMPLITUDE
control for a 5 V output
pulse
amplitude . Adjust
C143 1+ Output
Comp
Set
!
for minimum
aberrations on
the dis-
played
pulse at a sweep
rate of 10 ns/div .
NOTE ;
COMPONENTS SHOWN WITH DASHED LINES
ARE LOCATED ON BACK SLOE OF' BOARD,
Monitor the -
output
pulse through
the 10X
Attenuator
with the
Sampling
Oscilloscope .
Adjust the
- OUTPUT
AMPL[TUDE control for a
5 V output pulse ampli-
tude . Adjust C183 (- Out-
put Comp Set 1
for
minimum
aberrations on
the displayed pulse at a
sweep rate of 10 ns/div .