IBM System/370 145 Reference Summary page 35

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EXAMPLE CHART FOR ARRAY CARD OUTPUTS OF PHASE 21 MEMORY
Sync· PIN 004 "SET'
Probe: PIN 805 "Data out"
Example 1 · Good Output Zeros read
Example 2: Failing Output (Glitch) Zeros read
Chan.1
Chan. 2 Logical~
- .... , ... - ""-... Worst Case (Switch to 1 )
Logical 1 is read out
Chan. 1 - - .
=t --/--- --
GND
- - - - - a:=230mV
- - lGND
Chan.2 - - -
If under voltage variatton
'~"
is 230 m V or less card must be replaced,
EXAMPLE CHART FOR ARRAY CARD
OUTPUTS OF PHASE 21 MEMORY
Example 3: Fa1hng Output (Bad slope) Zeros read
This spike has no effect.
Cards with bad slopes must be replaced.
2.8