FOIA
CHIP COMPARATOR RELIABILITY
Document Type:
Collection:
Document Number (FOIA) /ESDN (CREST):
CIA-RDP78B04747A001500030048-1
Release Decision:
RIPPUB
Original Classification:
C
Document Page Count:
2
Document Creation Date:
December 28, 2016
Document Release Date:
January 30, 2002
Sequence Number:
48
Case Number:
Publication Date:
January 20, 1966
Content Type:
MF
File:
| Attachment | Size |
|---|---|
 CIA-RDP78B04747A001500030048-1.pdf | 56.08 KB |
Body:
25X1A
Approved For R&s6-2t02/06/1T CIA- O 78B04747pe 5000 0048-1
NPIC/P&DS/D/6-730
20 January 1966
MEMORANDUM FOR: Chief, Support Systems Section, DB/P&DS
25X1 A ATTENTION
THROUGH
Chief, Equipment Performance Section, DB/P&DS'?'
SUBJECT Chip Comparator Reliability
1. The reliability of the I digitizing components in
the chip comparator system installed in IAD is extremely poor. The
circuitry must be constantly adjusted to compensate for variations in the
interferometer signals, and, when this is no longer possible due to range
limitations, the interferometer outputs must be adjusted. These adjust-
ments have been required at least once a week and are difficult and time
consuming.
2. Because the prototype system experienced the same failure rate,
it must be assumed that the other systems about to become operational will,
also. Six or more comparators needing a lengthly tune-up weekly is an
unconscionable situation.
3. The following is a list of dates when one or both axis failed on
IAD's instrument. It should be noted that this reflects a light work load
and heavier use would probably require more frequent adjustments.
0
Axis Counting Incorrectly Date
X 19 Nov 65
X-Y 9Dec 65
X - Y 30 Dec 65
X-Y 3Jan 66
X 12 Jan 66
X (Impossible to correct-all 19 Jan 66
controls at limit of range)
DECLASS REVIEW by NIMA/DOD
25X1A
Approved For
F DP78B0474701500030048-1
SUBJECT: Chip Comparator Reliability
4+. The manufacturer should be contacted regarding this problem,
as a "fix" is clearly necessary.
25X1A
25X1A
ILLEGIB
Distribution:
Orig & 1 Addressee
2 P&DS/DB
Equipment Performance Section
Approved For Release 2002/06/17: CIA,RDP78B04747A001500030048-1
Printer-friendly version