1、M I L-T-2 2 I 4 3 A (WE P1 20MAY i960 MILITARY SPECIFICATION TELETYPEWRITER, TT-264/AG This specification has been approved by the Bureau of Naval Weapons, Department of the Navy, 1. SCOPE 1.1 Scope - The equipment covered by this specification is a transmitting and re- ceiving page printing telegra
2、ph set, which may be operated into, or out of, a converter for use over half duplex (simplex) or fuil duplex radio communication links between aircraft and properly equipped surface stations or other aircraft. 1.2 Classification - The Teletypewriter TT-264/AG shail be of one type and shall consist o
3、f the foilowing items: Apple Items Type Designation Para, 3.3.1 3.3. 2 Transmitting Keyboard (*I Receiving Page Printer (*I Connecting Chassis (including Internal line battery supply) (*) 3.3.3 case (*I Automatic Paper Winder . (*) Mounting (*) Airborne type carrying 3.3.4 3.3.5 3.3.4. 2 NOTE: (*) S
4、ee paragraph 6.2. the following equipments which are not to be supplied as part of this equipment. 1.3 Compatibility Requirement - The equipment shall be capable of operating with - unit Type Designation Radio Set AN/ARC-38 (Modified for FSK operation) Keyer, Frequency Shift KY- 3 O2/ARC- 3 8 Collin
5、s Radio Co. Model 706B-1 or an approved equivalent equipment Coilins Radio Co. Model 614C-4 or an approved equivalent equipment Control, FSK 2. DOCUMENTS 2.1 General - The following documents of the issue in effect on the date of invita- tion for bids form a part of this specification, to the extent
6、 specified herein: SPECIFICATIONS Militarv MIL-C-172 Cases; Bases, Mounting; and Mounts, Vibration (For, Use with Electronic Equipment in Aircraft 1 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-221434ONEP) MIL- E -4682 MIL-W- 5088 MIL-E- 540
7、0 MIL-T-5422 MIL-1-6181 MIL-P-7788 MIL- P- 17555 MIL-T-18303 MIL- N- 18307 Electron Tubes and Transistors, Choice and Application of Wiring; Aircraft, installation of Electronic Equipment, Aircraft, General Specification for Testing, Environmental Aircraft Electronic Equipment Interference Limits, T
8、ests and Design Requirements, Aircraft Electrical and Electronic Equipment Plate, Plastic, Cockpit and interior Controls Lighting Preparation for Delivery of Electronic Equipmen, Miscellaneous Electrical Equipment (Except Rotating Electrical Equipment) and Associated Repair Parts Test Procedures, Pr
9、eproduction and Inspection, For Aircraft Electronic Equipment, Format for Nomenclature and Nameplates for Airborne Electronic and Associated Equipment STANDARDS 2. 2 Military MS 25245 Connections, input Power Airborne Electronic Equipment; 28-Volt DC, 115-Volt Single-phase AC, or 115/200 Volt 3-Phas
10、e AC, or Combinations . MIL -STD - 704 Electric Power, Aircraft, Characteristics and Utilization of . Bureau of Naval Weapons SAR-300 Material Changes and Material Bulletins, Preparation of Availabilitv of Documents - (1) When requesting applicable documents give both the title and number. Copies of
11、 this specification and applicable documents may be obtained upon application to the Commanding Officer, Naval Supply Depot, (CDS), 5801 Tabor Avenue, Philadelphia 20, Pennsylvania. 3. REQUIREMENTS 3.1 Parts and Materials - in the selection of parts and materials, fulfillment of major design objecti
12、ves shall be the prime consideration. in so doing the following shall govern: (1) Parts and materials as approved by Specification MIL-E-5400 shall be given first consideration. (2) Nonrepairable subassemblies, as outlined in Specification MIL-E-5400, shall be used when practicable. The general size
13、 of the subassembly, and the amount of circuitry to be included therein shall be approved by the procuring activity. Nonrepairable subassemblies must be reliable, A mean-time-to failure of more than 5000 hours should be the goal of. each. 2 i Provided by IHSNot for ResaleNo reproduction or networkin
14、g permitted without license from IHS-,-,-MIL-T-22193A 58 7779706 0150832 T B .- e-. .* I MIL-T-22143A WEP) (3) When previously produced models of this equipment did not use non- repairable subassemblies, the design shall not be changed to employ non- repairable assemblies without the approval of the
15、 procuring activity. Nonstandard Parts and Material Approval - Approval for the use of non- Electron Devices - Transistors and diodes shall be chosen and applied, and 3. i. 1 standard parts and materials shall be obtained as outlined in Specification MIL-E-5400, the complements reported as outlined
16、in Specification MIL-E-4682. The complement report must be submitted to the procuring activity for review and approval prior to preproduction testing. No electron tubes shall be used. 3.1.2 3.2 Design and Construction - 3.2.1 General - This equipment shall fulfill all applicable design and construct
17、ion requirements of SpecificatioMIL-E-5400 unless otherwise specified herein. Service Conditions - The equipment shall operate satisfactorily under any of the environmental and mechanical service conditions or reasonable combination of these conditions as specified in Specification MIL-E-5400 for Cl
18、ass 1 equipment. tablish normal performance requirements and for making laboratory bench tests. Temperature Altitude Normal ground Vibration None Humidity input power voltage Total Weight - The total weight of the equipment, excluding a full size stand- 3.2.2 3.2.3 . Standard Conditions - The follow
19、ing conditions shall be used as a basis to es- Room ambient (30C f 10OC) Room ambient up to 90% relative humidity 115 f 1. O V AC 3.2.4 ard paper roll and external cables, shall be a minimum consistent with good design and shall not exceed 30 pounds. Operational Stability - The equipment shall opera
20、te with optimum performance for 100 hours, continuously or intermittently, without the necessity for readjustment of any controls which are inaccessible during flight, 3.2.5 3.2-6 Operating Life - 3.2.6.1 Reliable Operating Life - The equipment shall have a reliable operating life of at least 250 ho
21、urs without removal for bench servicing. Parts requiring servicing or replacement at the end of this interval to renew this service life shall be specified by the manufacturer. 3.2.6.2 Total Operating Life - The equipment shall have a minimum total operating life of 2,000 hours with reasonable servi
22、cing and replacement of parts. Parts requiring replace- ment within this interval and the life of such parts shall be specified by the manufacturer. 3.2.7 eration using external wiring in accordance with the applicable requirements of Specification MIL-W-5088. The external wiring shall be unshielded
23、, except that a minimum number of the in- dividual wires may be shielded when demonstrated as necessary to meet interference control re- quirements and provided the assembly of the cable to its plugs may be easily accomplished. Cables and Connectors - The equipment shall provide for the use of cable
24、s and connectors in accordance with Specification MIL-E-5400. However, cables and that portion of the connectors which is to be attached to the cables shall not be supplied as part of the equipment. An appropriate power cord six feet long shall be provided. Interconnection Cabling - This equipment s
25、hall be capable of satisfactory op- 3. 2.8 E Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-_ MIL-T-22143A 58 U 7777706 0350833 I U MIL-T- 22143A (WEP) 3.2.8.1 Signal Cords - A pair of six-foot two conductor cords shall be provided. These cords shal
26、l have connectors which are compatible with the connectors furnished on the equip- ment listed in paragraph 1.3. input Power Requirements - The equipment shall meet all applicable require- ments of Specification MIL-STD-704 and shall give specified performance when provided with power from the follo
27、wing sources with characteristics as defined in MIL-STD-704. The power required shall not exceed the amounts shown. 3.2. 9 (1) 115 V. A. C. single phase Category C 500 VA 3.2.10 input Power Connection - input power connections shall be in accordance with MS 25245. 3.2.11 Overload Protecuon - ver!oad
28、 protection for the equipment shall be provided in the equipment. All parts and circuits of the r ,lipment which are likely to carry an overload due to any failures or Po-r adjustments shall have suitable protective devices or shail be proportioned to withstand such ovt;load without permanent damage
29、 to the equipment. The use of fuses and other protective devices shail be held to a minimum. 3. a. ll. l Undervoltage Protection - The equipment shall not be damaged by voltages be- low the minimum specified herein and shail automatically resume normal operation when the voltage is returned within l
30、imits. 3.2.12 proval for equipment identification shall be in accordance with Specification MIL-N-18307. See paragraph 6.2. 3.2.13 Nomenclature and Nameplates - Nomenclature assignment and nameplate ap- interchangeability - The equipment shall meet the interchangeability require- ments as specified
31、in Specification MIL-E-5400. 3.2.14 Maintenance Provisions and Field Testing - Provisions for maintenance shall be as specified in Specification MIL-E-S4OO . Specific test points and test facilities shall be provided to the greatest extent practicable for ease of field testing and maintenance. 3.2.1
32、5 Radio Interference Control - The generation of radio interference by the equipment and vulnerability of the equipment to radio interference shall be controlled within the limits of Specification MIL-1-6181, unless otherwise specified herein. 3.2.16 Warm-up Time - The time required for the equipmen
33、t to warm-up prior to operations shail be kept to a minimum and shall not exceed 40 minutes at ambient temperature of -54C. 3.3 Performance Requirements - The performance of the equipment shall be as specified hereinafter, These performance requirements shall apply under both standard and service co
34、nditions, unless otherwise specified herein. 3.3.1 Transmitting Keyboard (*) - The keyboard which contains the transmitting con- tacts shall be a standard communications three row keyboard containing thirty-two character keys including the space bar. The keyboard shail also contain a “Break“ key and
35、 a ffRepeat“ key, Bank on keys shail be a standard .25 inch, spacing between key tops shall not be less than O. 75 inch and spacing between edges of adjacent key tops shall not be less than O. 18 inch, 3.3.1.1 “Send-Receive“ Switch - The keyboard shall be provided with a “send-receive“ switch. Placi
36、ng the switch in the “Send“ position shall permit transmission of a message by causing electrical connection with a radio transmitting circuit and shall allow recording of a tlhomeq copy on the Receiving Page Printer. Placing the switch in the “Receive“ position shall short out the signal line ahead
37、 of the “Break“ key and retain a closed loop no matter what key may be struck on the key- board. in “Receive“ position, received messages only shall be recorded on the Receiving Page Printer, t! I- c 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
38、3.3.1.2 “Break“ Key - A ItBreakt key shall be provided to enable the operator to open the transmit signal loop in the event it becomes necessary to signal the operator of a distant station to stop the transmission. Depression of the “Break“ key shall cause the transmission of a spacing signal. 3.3.1
39、.3 ttRepeattt Key - A “Repeat“ key shall be provided, which when depressed, shall cause the continuous transmission of the electrical signal corresponding to that of the last key lever operated, so long as the ttRepeattf key is held depressed. When the t*Repeattt key is held down, the last character
40、 key lever which had been depressed no longer need be held down to effect continuous transmission of the electrical signal corresponding to that last character key lever. l1 3.3. i. 4 ltBelltt Key - The ttBelltl key shall be the letter “stt key when the keyboard is placed in the Tig“ or upper case c
41、ondition. Striking the ttBelltf key shall cause the bell to ring once at both the transmitting and receiving station in order to summon an operator to a normally unattended machine. This “on-line“ function will work only in the upper case or tlFigt condition. 3.3.1.5 Keyboard Touch - The pressure re
42、quired to operate any key lever shall be 8 * 2 ounces, 3.3.1.6 another key until the first key is released. 3.3.1.7 pletely beneath the Receiving Page Printer when the equipment is being used for receive only purp- oses. Provision shall also be made for easily sliding the keyboard out to operating p
43、osition (in front of the Receiving Page Printer) or further out and cpmpletely free of the equipment, When the keyboard is placed in storage position or completely removed from the equipment, the transmitting signai lines shall be automatically shorted, but shall not affect the operation of the page
44、 printer, Keyboard interlock - Depressing one key shall physically prevent depressing Keyboard Stowage - Provision shall be made for storing the keyboard com- 3.3.1.8 Keyboard (Remote Operation) - The keyboard shall be capable of remote op- eration, when provided with a smail drive motor and necessa
45、ry gears and/or drive belts. When operated remotely, the keyboard shall be completely independent from the printer unit except for wire connection. The remote keyboard shall operate at any of the speeds specified in this specifica- tion. 3.3.1.9 Distortion of Transmitted Signals - The electrical sig
46、nals emitted from the transmitting contacts shall contain not more than 5 per cent each, bias and end distortion generated by the keyboard. 3.3.1.10 .to operate in accordance with paragraph 3.3.1.8, shall not weigh more than 5. O pounds and shall have a size not greater than 12 inches wide by 8.25 i
47、nches deep by 1.5 inches high. Keyboard Weight and Size - The keyboard, exclusive of attachments necessary 3.3.1.11 Keyboard Operating Light - A suitable lamp or lamps, controlled by an Wn-fftl switch, shd be provided to illuminate the keyboard when the keyboard is operated as an integral part of th
48、e receiving prwter. The same light source may be used to provide suitable illu- mination of the printed copy as specified in 3.3.2.9. 3.3.1.12 Keyboard Signaling Requirements - The keyboard transmitter shall be capable of furnishing radio transmitting FSK terminal equipment with standard 7.42 unit,
49、start-stop, serial Baudot code signals on a 100 ma 28 volt D. C. line. Signal line battery shall be furnished internally from the connecting chassis, or during remote operation from an applique power supply unit. 3.3.2 Receiving Page Printer (*) - The page printer shall employ a type cylinder or similar device which is located behind th e recording medium such that a neutral position. or space is not required in order to render visible the last character printed. The type cylinder shall be sep- arat
