B1 DIRECTIONAL COUNTER (PIGMI 11) MONTHLY PROGRESS REPORT NO. 7.

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B04747A001800060004-3
• Release Decision: RIPPUB
• Original Classification: K
• Document Page Count: 2
• Document Creation Date: December 28, 2016
• Document Release Date: May 30, 2001
• Sequence Number: 4
• Publication Date: September 11, 1961
• Content Type: LETTER

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DECLASS REVIEW by NIMA/DOD
SUBJECT: Bt DIRECTIONAL COUNTER (PIGMI II)
MONTHLY PROGRESS REPORT No. 7.
REFERENCE: _
GENTLEMEN:
1.0 INTRODUCTION
1.1 IN COMPLIANCE WITH THE REQUIREMENTS OF THE SCHEDULE, TASK ORDER No. 1,
PARAGRAPH 2 ENTITLED REPORTS OF THE SUBJECT CONTRACT, WE HEREBY SUBMIT
OUR MONTHLY PROGRESS REPORT No. 7. THIS REPORT COVERS THE REPORTING
PERIOD FROM 25 JULY 1961 To 25 AUGUST 1961 ON THE DESIGN AND FABRICATION
OF PIGMI 11 DESCRIBED IN DESIGN SPECIFICATIONS DS-1157A.
1.1 THE COUNTER SYSTEM CONVERTS A SHAFT ROTATION INTO DIGITAL FORM. THIS
DIGITAL INFORMATION CAN BE STORED ON EITHER OR BOTH, TYPER (MODEL C IBM)
OR KEYPUNCH (024, 026, 526 10M).
2.1 THE COUNTER SYSTEM IS INTENDED FOR USE AS THE OUTPUT FOR THE
STATINTL IT CAN ALSO BE USED AS AN ORDINARY COUNTER BY APPLYING
EXTERNAL PULSES AS AN INPUT.
3.I PERFORMANCE OF THE SYSTEM DURING FINAL TEST PRODUCED UNSATISFACTORY
RESULTS. FAILURE TO MEET SPECIFICATIONS HAS RESULTED IN DELAY OF THE
PREVIOUSLY QUOTED DELIVERY OF 1 AUGUST 1961.
4.0 SUMMARY OF WORK PROGRESS COMPLETED DURING THE PERIOD 25 JULY 1961 To
25 AUGUST 196 1 .
4.1 EVALUATION TESTS ON THE LARR AND PIGMI WERE CARRIED OUT FOR A PERIOD
OF APPROXIMATELY 10 DAYS.
4.2 THE RESULTS OF THESE TESTS PROVED THAT THE FOLLOWING MAJOR PROBLEMS
EXISTED:
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4.2.2 INCREASED NOISE CONDITION APPEARED IN THE PIGNI WHEN OPERATED
WITH THE LARR.
4.2.3 WHEN THE PIGMI WAS COUPLED WITH THE LARR, THE COUNTER POSITION
AND SIGN CHANGED DURING READOUT WITHOUT ANY CONSISTANT PATTERN.
4.2.4 PRESET CIRCUITRY ON THE PIGMI WAS FOUND TO BE UNRELIABLE.
4.3 A CONCENTRATED EFFORT BY THE PROJECT TEAM TO CORRECT THE ABOVE PROBLEMS
FAILED TO PRODUCE ANY SIGNIFICANT RESULTS. SOME IMPROVEMENT IN REDUCING
NOISE SENSITIVITY WAS EXPERIENCED AFTER REVISING THE BASIC COUNTER
CIRCUITRY AND SIGN CIRCUITRY AND SHIELDING OF THE LARK CABLES. A RE-
DESIGN OF THE PRESET CIRCUITRY FOR GREATER RELIABILITY WAS SUCCESSFUL.
4.4 AN ADDITIONAL SYSTEMS TEST WAS MADE ON 22 AND 23 AUGUST TO DETERMINE
THE EFFECT OF THE REVISIONS. HOWEVER, THE RESULTS OF THIS TEST PROVED
THAT THE SYSTEM DID NOT OPERATE WITHIN SPECIFICATIONS.
5.0 WORK TO BE ACCOMPLISHED DURING THE NEXT REPORTING PERIOD.
5.1
A THOROUGH INVESTIGATION INTO EXISTING COUNTER WILL BE MADE TO DETERMINE
CONCLUSIVELY THE CONCEPT OF THE DESIGN AS A RELIABLE PART OF THE OVERALL
SYSTEM.
5.2
IN CONJUNCTION WITH 5.1 A STUDY WILL BE MADE TO DETERMINE THE NECESSITY
OF REDESIGNING THE ENTIRE COUNTER CIRCUITRY.
5.3
THE RESULTS OF
ING OFFICER BY
THESE FINDINGS.
5.1 AND 5.2 ARE SCHEDULED FOR PRESENTATION TO THE CONTRACT-
I OCTOBER 1961. DELIVERY OF THE SYSTEM WILL BE BASED ON
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