IBM System/34 Maintenance Manual page 506

c/
Waveshape 166
Note: The arrows in this wave form show the
relationship between the two signals; channel
B signal drops as channel A signal rises.
Scope settings:
Triggering to - on G2S04
Time base to .2 ms/div
Channel 1 to 1 v/div*
Channel 2 to 1 v/div*
Waveshape 173A
Scope settings:
Triggering to -internal
Time base to .1 ms/div
Channel 1 to 5 v/div*
Channel 2 to 5 v/div*
Note: Check to see that the signal changes
(as marked by
0 ).
Waveshape 1738
-
- - ' - • +
~
• -
0- .
. .
Scope settings:
Triggering to -internal
Time base to .1 ms/div
Channel 1 to 5v/div*
Channel 2 to 5 v/div*
Note: Check to see that the signal changes
(as marked by
0 ).
N4D05
Channel A Filter
N4B02
Channel B Filter
K4B02
Limiter Output
K4D02
Limiter Output
Delayed 450
0
(2400 bps)
(shift register
bit 80).
K4B02
Limiter Output
K4D04
Limiter Output
Delayed 990
0
(1200 bps)
(shift register
bit 88)
*
Use only X1 probe; waveshape may be distorted or not
seen when scoping millivolt signals with X10 probe.
Waveshape 173C
.
.
. . .
. .
. .
.
. . . . . . .
.
. . . . - - -0).
- - -
-~--
Scope settings:
Triggering to -internal
Time base to .1 ms/div
Channel 1 to 5 v/div*
Channel 2 to 5 v/div*
Note: Check to see that the signal changes
(as marked by
0 ).
Waveshape 183
Intensity might have to be increased
to see a good signal.
Scope settings:
Triggering to - on G2S04
Time base to .2 ms/div
Channel 1 to 5 v/div*
Channel 2 to 2 v/div*
Note: Check to see that the signals change
(as marked by " ).
Waveshape 248
Scope settings:
31-480
Triggering to -internal
Time base to .2 ms/div
Channel 1 to .5 v/div*
Channel 2 to 5 v/div*
K4B02
Limiter Output
K4B05
Limiter Output
Delayed 540
0
(2400 bps) or
1080
0
(1200 bps)
(shift register bit
96)
N4D04
Channel A Receive
Data
N4D06
Channel B Receive
Data
N4G02
Channel A Eye
N4B09
Channel B Eye
G2S04
Ramp Clock A
D2U05
Channel B Eye
Rectified
Data Communications 47
•