Scope Charts - IBM 5280 Maintenance Information Manual

Scope Charts
2.0 V/cm
0.05 V/cm
File Data
Example: 01010
~l~fjlIEHE
i
C 0 C C 0 C C 0 CI
~
,..
"
I')
b
t:::-
1\
1----
II---
Iv--
\-...
r----'
---i.~
I
4 p.s [ .... . - - - - - - -
2.0 p.s/cm
Read Head Signal at TP1 and TP2
2.0 ms/cm
10 JJ.s/cm
\
Note:
Use Tektronix 453, 454, or similar
oscilloscope with xl 0 probes.
Channel A sweep mode Normal
Channel A level
+
Channel A coupling
DC
Channel A slope
+
Channel A source
Ex ternal
Trigger
Normal
Mode Channell
Channel 1 volts/division
2.0 V/cm
Channel 1 input DC
Times per division 2
p.s/cm
Connect channell to +File data
Connect trigger to +Index test pin
Observe: Clock pulses every 4/Js. Pulse
duration should be between 100
and 500 ns. Pulse amplitude should
be between 2.4 and 4.2 vol ts.
Note:
Use Tektronix 453, 454, or similar
osci Iloscope with x 10 probes.
Channel
A
sweep mode
Channel A level
Channel A coupl ing
Channel
A
slope
Channel A source
Trigger
Mode
Channell volts/ division
Channel 2 vol ts/division
Channell input
Channel 2 input
Invert
Times per division
Connect channell to
Connect channel 2 to
Connect trigger to
Normal
+
DC
External
Normal
Add
0.05 mV/cm
0.05 mY/em
AC
AC
Pull out
2 ms/cm
Preamp TPl
Preamp TP2
+Index test pin
Observe:
The amplitude of the read signal
should be between 6.5 to 560 mY.
Theory 63