Developed Tape Samples - IBM 3420 Reference Manual

DEVELOPED TAPE SAMPLES
Here are some tips which may be helpful in analyzing the failure on a developed tape:
• Distance Relationships:
~
.15"
1.18"----..
• Erase Gap (ERG) Distances:
Density
6250
1600
800
7-Track
• Interblock Gap Size:
Density
6250
1600
800
7-Track
Developed Tape Examples
~ !--
_ _
To
BOT
t
Data
Block
Single Successive
ERG ERGs
3.75"
3.45"
4.2" 3.6"
4.2" 3.6"
4.5" 3.75"
Nominal Minimum
(Inches) (Inches)
.3
--
.6 .5
.6 .5
.75 .68
Good Data at 1600 bpi
~.6"~
Good
Gap
69