DEAR JOHN:

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B04747A000900050028-8
• Release Decision: RIPPUB
• Original Classification: K
• Document Page Count: 6
• Document Creation Date: December 28, 2016
• Document Release Date: June 17, 2002
• Sequence Number: 28
• Publication Date: July 19, 1963
• Content Type: LETTER

Approved For Release 2002/07/10 : CIA-RDP78B04747A000900050028-8
Dear John,
Please find enclosed a copy of the letter we discussed
during our cation this morning and a copy
of my reply
I discussed) the trouble you are having
with your equipment and he suggested you might care to try
the following Power Supply chassis set up procedure.
Check the 9 volts supply and, if it is within tolerance
(*/.. .73 v) set the 2V line to exactly 2/9 of the 9 volt
supply reading,
Sincerely yours,
Declass Review by NIMA/DOD
STATINTL
STATINTL
STATINTL
STATINTL
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 Approved For Release 2002/07/10 : CIA-RDP78BO4747A000900050028-8
Dear John,
Just after the other letter had been typed up I received
STATINTL another letter
He states that the Dataphone equipment will not include
full comprehensive ternary check. They do recommend that
Input Check be included and they will be supplying this.
He is quite certain that the delivery date he quoted you
will be met. The only reason this could be delayed is if
you visit in September as suggested and, as a result of
discussions with our engineers, you bting in changes on
the equipment.
Very truly yours,
STATINTL
STATINTL
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July 19, 1963
STATINTL
Ref. Dat aphon a fife adou t
STATINTL
'hank you for your letter of July 12th. I phoned
today to discuss the problem.
He stated that the actual wiring of the switch would depend
STATINTL on and he didn't know off hand if the twelfth tag
would wired in or not. Information will not be required
from this position and if it is wired In, the wiring can
be removed.
STATINTL
STATINTL
STATINTL
dly you
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 Approved For Release 2002/07/10 : CIA-RDP78BO4747A000900050028-8
BEST COPY
Available
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 Approved For Release 2002/07/10 : CIA-RDP78BO4747A000900050028-8
Thank, you .for-your letter of July 5th,;.
we ,peed.. to have reached steiern te;. on the s giies on
Ak you say
,
of E.O.T. T - will , tow to i;veell the.faots 'which le _ m e to Qnq .1re;,
in the first'-.ple.ceP C
"E _O.T.. musty be' placed on one of the 12 position'= gry s'zv td ic`s:
poss.
In a later communication dated
".due ? to,'equest of other manufacturers, it, is, aocep table to
us that,O.T. be replaced on the 12 position ro.tarics by
space and. the position of T.C.T. be fixed, ra`t,her than.
variable -----_E'
As .1 see it, this second statement can mean one of two things:--
1. That the rotaries can e,:ch be sei? to one of eleven meaningful
positions, 0 - 9 and minus ' The twelfth tag on t:~e switch
will in this case have ro cor;nectior _;ade to it and when any of
the switches are turned to t1-i :i ;st gsiti :-1, the equipment will.
transmit ze.r~a?S =i11 tee sit intervals 2 and a one in the
parity bit: 2' for that 2. That. the rotaries can ec.ci. 'o so'.: to one of L twelve meaning-
ful positions, 0 -- Cl:, lain 1 (-j ,.1:'i tJ.LC.E. The twelfth tag on
the switch will have c. connection to it in this case, and when
any of the switches are t.,arn .d to this 1^ s t position, the equip--
ment 'will transmit a cod- moanin_; "Sr'i'-CE" in the bit int:;i sRls
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2? - 25 and a parity bit depending on the cute for that character.
The whole issue resolves itself into a matter of whether or
not there is a wire connected to the twelfth tag on each of the
rotaries.
In the design as it stands at present I haves assumed that,
the first interpretation is correct, but would prefer confiimati0fl
on this point.
I hope this covers it sufficiently for you to give me a
definite reply. Please accept my apologies for all the trouble I
have put you to.
Yours sincerely,
a- AL?4
c -0
STATINTL
STATINTL
ILLEGIB
Approved For Release 2002/07/10 : CIA-RDP78BO4747A000900050028-8