IBM 5100 Maintenance Information Manual page 32

Space and Mark Error Graphs
The space and mark error graphs each consist of five
horizontal bars of asterisks that plot the number of incor-
rect levels discovered on the '+rcvd data' line at each of the
five uniform bit sampling times. The actual number of
errors for each sample time is also displayed as a 5-digit
decimal number in the total column at the extreme right
of the graph.
The total associated with each sample displays the actual
number of errors for that sample. Although the graph
only goes to 1 K,up to 64K can be displayed in the total
column for each sample.
Displayed on the bottom line of these graphs are the total
number of bits received during the test, the number of bit
synchronization errors, and the data transmission rate
being tested (either 134.5 or 300 bps).
The scale of errors along the bottom of these graphs is not
linear. The value of each space on the graph increases with
each 10-space division from left to right. For example, on
the extreme left of the scale, in the 0-16 error range, every
two asterisks in a bar
repr~sent
approximately three errors.
In the middle of the scale, between the 64 and 256 divi-
sions, each asterisk represents approximately 19 errors. At
the extreme right of the scale, between 512 and 1K divi-
sions, each asterisk represents approximately 50 errors.
SAMPLE
1
2 1
~HHH~
STEP NO, 031
->
SPACE ERRORS BY SAMPLE
3 1********************************
I.. 1
~HB':*·)~*****
5 1*********************
1 1
ERRORS: 16
6~
256
1
512
:LK
TOTAL
nonoo
00008
o
O~!'87
OO(}:1.6
00060
TOTAL
BITS=O~369255
SYNC ERRORS=00170
rMTE:::::J.3~.!:i
BPS
3-8
ENTER P(PAGE), C(CONTINUE), R(RESTART) OR T(TERMINATE) P
STATUS: ENTER REPLY
MDI
89~
STEP NO. 032
->
MARK ERRORS BY SAMPLE
SAMPLE
1
1****************************************
2 1******************************************
3 1**************************************************
~
1**********************************
5 1**************************************************
1 1 1 I 1
ERRORS: 16 64 256 512 lK
TOTAL
BITS=0~369255
SYNC ERRORS=(}0170 RATE= 300
ENTER P(PAGE), C(CONTINUE), R(RESTART) OR TCTERMINATE) P
STATUS: ENTER REPLY
TOTAL
0051~!
OO~568
() 1 02L~
()
O~5'+:I.
6553~.)
BPS