UNCLASSIFIED AD NUMBER LIMITATION CHANGES

Size: px

Start display at page:

Download "UNCLASSIFIED AD NUMBER LIMITATION CHANGES"

Katherine McLaughlin
5 years ago
Views:

1 TO: UNCLASSIFIED AD NUMBER ADB LIMITATION CHANGES Approved for public release; distribution is unlimited. FROM: Distribution authorized to U.S. Gov't. agencies only; Test and Evaluation; FEB Other requests shall be referred to Air Force Rome Air Development Center, DCLT, Griffiss AFB, NY AUTHORITY radc, usaf ltr, 8 nov 1982 THIS PAGE IS UNCLASSIFIED

2 I 1 THIS KEPORT HAS BEEN DELIMITED ; ivnp CLEARED FOR PUIUC SELlASE UNDER DOD DIRECTIVE AND NO RESTRICTIONS ARE IMPOSED UPOI t5 USE AND DISCLOSURE. DIStaiBUTION STATEffNT A ' - jv APPROVED FOR PUBLIC RELlÄSEj P/ST^IIUTIOH UNLl^ltEi). i

$* ' : W-fifMS x'-^^mm^mmm,"^>-'.av),\:..' '.$ MODULATION CONVERTER (DDMC) Operating Manual Sherbrooke University ^:.

Gov't agencies only; test and evaluation; February 1976.

3 * ' : W-fifMS x'-^^mm^mmm,"^>-'.av),\:..' '..- h*mk \l x^\\ VW C 3 RADC-TR Technical Report February 1976 t Baww DIRECT DIGITAL MODULATION CONVERTER (DDMC) Operating Manual Sherbrooke University ^:. 'i ' % h I 1 m CSS >~ O C3 loj ^»UäWJ»B»tiwwao C3 «^C ei f^3 ^^ Distribution limited to U. S. Gov't agencies only; test and evaluation; February Other requests for this document must be referred to RADC (DCLT), Griffiss AFB NY Rome Air Development Center Air Force Systems Command Griffiss Air Force Base, New York I f" J! ( t^lli \ 1! A\\\

$^^^;;,^^ \^ l^- This report has been reviewed and approved for publication.$ APPROVED: p<c^,..j;.

$'i \Zi =1 Ira JSSTIHÖUfal;.,.,. 'w^jpm D FOR THE COMMANDER : ^W4.$

4 llls iy^«;:,;s;>.:;(^.t^.i. ::r.,;^:4i;i4 i;o^.ift-i^h^.^^^;;,^^ \^ l^- This report has been reviewed and approved for publication. APPROVED: p<c^,..j;.:^- JULIAN GITLIN Project Engineer APPROVED ^h^ r~p0u('*^**l FRED I. DIAMOND Technical Director Communications St Control Division SüCESStä.'i \Zi =1 Ira JSSTIHÖUfal;.,.,. 'w^jpm D FOR THE COMMANDER : ^W4.'^^y WMUt- JOHN P, HUSS Acting Chief, Plans Office BY Doyfiot return this copy. Retain or destroy.

6 :..,....,,,....,,.., i TABLE OF CONTENT 1 Introduction,....1 I 2 Identification,..,1 3 Physical description...! 4 Preliminary adjustments.9 5 Operating procedure References..12 : '^StMliäi^ä^k

mmmmmsm "H^.&^^^^'W^^W'^W'H^ 3.2.1.10 Frame alarm light and pushbutton When frame synchronization has been lost, the frame light goes on.

If the light does not go off, a trouble-shooting procedure must be started (Technical Report, Phase II, Appendix D)V- "*l--vi-i 3.2.1.

10 mmmmmsm "H^.&^^^^'W^^W'^W'H^ Frame alarm light and pushbutton When frame synchronization has been lost, the frame light goes on. If pushing the frame pushbutton makes the light go off frame synchronization is good again. If the light does not go off, a trouble-shooting procedure must be started (Technical Report, Phase II, Appendix D)V- "*l--vi-i Test amplifier and test point board 5 This board (Figure 1) contains the amplifier used in the TEST of the DDMC (Technical Report, Phase II, Chapter 4). The upper BNC connector is the output of the amplifier. - : The "A < INPUT" is used in the A to PCM analog conversion (Technical Report, Phase II, Section ). The "A < 1" gain is adjusted with the A < 1 adjustment. The "A > 1 INPUT" is used in the PCM to a analog Conversion (Technical Report, Phase II, Chapter )., The "A > 1" gain is adjusted with the A > 1 adjustment. The ten OUT and the ten IN pins on the right side of :.; :, the board are reserved for the use of the European companding law. The syllabic filter outputs (SYL pins) and the integrator outputs (INT pins) for analog modulator (MOD) and for the analog demodulator (DEMOD) are provided for tests or/and adjustments of the delta codec (4.2)

11 ^Aius^il^ ü - - «i.j.»^^ i^i lli?tiis;:wvf>^>» g -P C o 5-1- Q Q r

isirmiiks immm 3.2.1.12 Control lead This lead controls the delta codec connections. Control lead COA must be connected to the GND pin for normal operation of the DDMC.

$POWER PLUG T Board wrapping connections R PCM T ~ 0 D1 CLOCK CLOCK pcm 0 TD968 PCM 0 TD660 ir R PCM T Qm \CL0CK PCM (?$

12 isirmiiks immm Control lead This lead controls the delta codec connections. Control lead COA must be connected to the GND pin for normal operation of the DDMC. When COA is connected to the "1" pin/the analog del- ta codec is connected back-to-back which means that the analog modulator out- put becomes the analog demodulator delta input (used in Section of the Technical Report, Phase II) DDMC rear panel i- The rear panel is provided for connection purposes only. POWER PLUG T Board wrapping connections R PCM T ~ 0 D1 CLOCK CLOCK pcm 0 TD968 PCM 0 TD660 ir R PCM T Qm \CL0CK PCM (?) T0968 CLOCK PCM )r\ Q TD660 Figure 2 DDMC rear view B Board wrapping connections/

Those connections are described on the WT (or WB) drawing of Annex B (Technical Report, Phase II).

13 .. ^^*rrb^-<":^;^-«-v^ikt-^f^^^" k 1? ^-'"-fr- -/ ' (-. rr»f -j-iy-.kr *Tt; 7,:',',«: -^ ^^Ä ~'T-'T'S j- -" ' " I ^^J "T" (or "B") board wrapping connections All the inter-board connections are provided on the rear connectors. Those connections are described on the WT (or WB) drawing of Annex B (Technical Report, Phase II). The leads are coded with two letters: the first one refers to the connector pin, the second one to the top (H) or bottom (B) part of the connector. This code is used either for the "B" board wrapping connectors or for the "T" board wrapping connectors. The connector pin letters are printed on the connector Power plug DDMC by means of a 6 foot cable. This plug is used to connect the power supply to the D1 connections "T" PCM wires: Two separate BNC plugs are provided for the "R" and The upper ones are for receiving (PCM ^ A conversion) The lower ones are for transmitting (A + PCM conversion) TD968 connections Two BNC plugs are provided for each way, one for the PCM data, the other for the PCM clock. The upper ones are for receiving (PCM + A conversion) The lower ones are for transmitting (A + PCM conversion) D^/ssm^*»

"mmmk ; 1 : fc 3.2.2.5 TD660 connections Two BNC plugs are provided for each way, one for the PCM data, the other for the PCM clock.

3 Power supply description A connector is provided on the rear panel to connect the power supply to the DDMC by means of a 6 foot cable. Remote sensing connections are made to prevent cable drop.

14 "mmmk ; 1 : fc TD660 connections Two BNC plugs are provided for each way, one for the PCM data, the other for the PCM clock. The upper ones are for receiving (PCM -> A conversion) The lower ones are for transmitting (A -> PCM conversion) 3.3 Power supply description A connector is provided on the rear panel to connect the power supply to the DDMC by means of a 6 foot cable. Remote sensing connections are made to prevent cable drop. A plug is also provided on the rear panel for connection to the line (120V, Hz).. * m A general switch and an ON indicating light are included on the front panel. Protection is provided by a 5 amp fuse mounted on the front panel. Identification is engraved on the front panel. 3.4 Power supply cable A power supply cable with a plug on each end is provided for connec- tion of the DDMC to the power supply, 3.5 Telephone set A standard telephone set is provided with the equipment. The dual telephone;jack must be connected with the reference side in the down position.. ; J.*I -,-:I.-..J:.VA... '.."*; /<:,c:v..^v^>ii:;:.^.^-0.-;:...v...^^^

communications technology, products and services oriented to the needs of the USÄF.

19 1 : :..,,., ', m ^ n^^^yi-^: ^-^ t : e^^^oe^^^^e^^t^oe j^^j^^e^^^^^^e^^ej^ ^t^ MISSION of Rmm Air Development Center I. v, RhDC is the principal AFSC organization charged with planning and executing t/ie USAF exploratory and advanced development programs for information sciences, intelligence, command, control and communications technology, products and services oriented to the needs of the USÄF. Primary RADC mission areas arc communications,^ electromagnetic guidance and control, surveillance of ground and aerospace objects, intelligence data collection and handling, information system technology, and electronic reliability, maintainability and compatibility. RADC has mission responsibility as assigned by AFSC for demonstration and acquisition of selected subsystems and systems in the intelligence, mapping, charting, command, ^ control and communications areas. \. f ^.UTIO/v '^6-^ k., -AÜ.

spider a bit of information

spider a bit of information Please read this before connecting power to the unit. There are important things about the power cable and cooling that must be done to allow for long life and reliable operation.