Tektronix 7D01 Instruction Manual page 71

Performance Check and Adjustment-7DO1 (SN BOZO000 & up)
d
5. CHECK MINIMUM DATA PULSE WIDTH
4
k. Repeat part g.
-
a. Set pulse generator for output waveform as follows:
LO Level
. . . . . . .
.0.0 V
HI Level
. . . . . .
.
.at least +2.0 V
HI Level Pulse
Duration
. . .
.
. . .
. I 5 ns
Pulse Period.
.
. . .
,101~s
I. Change pulse generator pulse duration to 20 ns.
-
-
m. Change WORD RECOGNIZER CH 4 through CH 7
switches to HI.
BACK TERM
. . . .
.
Out
d
n. Repeat part g.
-
b. Change SAMPLE INTERVAL switch to 10 ns.
c. Change DATA CHANNELS switch to 0-3.
.\/
d. CHECK-For at least one H I pulse stored on CH 0
display.
o. Change WORD RECOGNIZER CH 0 through CH 7
-
switches to X.
p. Disconnect P6451 probe from top Data-Input Con-
--
nectar
(Channels 0-7 and External Clock) and connect
t o bottom Data-Input Connector (Channels 8-15 and
Probe Qualifier).
-.
.\/
6. CHECK MINIMUM TRIGGER PULSE WIDTH
a. Change TRIGGER SOURCE switch to EXT position.
q.
Change WORD RECOGNIZER CH 8 through CH 15
-
switches to H I.
b. Disconnect 50-ohm cable from amplifier unit input
and connect to 7D01 EXT TRIGIQUALIFIER INPUT. d
r. Repeat part g.
d
c. CHECK-That TRIG'D light is on and remains on.
d
7. CHECK WORD RECOGNIZER FILTER
d. Disconnect 50-ohm cable from EXT TR IGIQUALI-
a. Change pulse generator pulse duration
t o
300 ns.
-
FlER INPUT and reconnect to amplifier unit input.
b. Rotate WORD RECOGNIZER FILTER control to
e. Change pulse generator pulse duration to 10 ns.
>300 ns (fully clockwise).
-
f. Change TRIGGER SOURCE switch to W.R. and
4
c. CHECK-That THIG'D light is out and remains out.
-
WORD RECOGNIZER CH 0 switch to HI.
c L/,Fid
h &
U - T f k . ]
/f17"u
c 2 B 0 4
p a l s < & / d l - &
i / ~ n / t s b i l l ,
pc '.P:f
0
-
d
g. CHECK
hat T HIG'D light is on and remains on.
d
8 . CHECK RECOGNIZER OUTPUT
a. Change WORD RECOGNIZER FILTER control to
MIN (fully counterclockwise).
-
h. Copnect all oae-rdata channel ~ r a b e leads (Channels
1
through 7 ) to pulse generator output.
b. Disconnect 50-ohm cable from pulse generator out-
put and connect to W. R. OUT connector.
I.
Change pulse generator pulse duration to 15 ns.
d
c. CHECK-For output pulse of at least +0.95 V ampli-
j.
Change WORD RECOGNIZER CH 1, CH 2, and CH 3
tude and a baseline-level from ground reference of
switches to H I.
+50 mV or less (into 50-ohm load).
---
-.
-
J~erformance Requirement check; see introductory informatiun.
5-8 REV OCT 1982