TM 11-7025-221-20
Section Il. EQUIPMENT DESCRIPTION AND DATA
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Subject
Characteristics, Capabilities, and Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1- 9
Location and Description of Major Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Identification Plates and Stencils . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Differences Between Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Equipment Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13
1-9. Characteristics, Capabilities, and Features.
a. Characteristics.
Interface Ground Equipments to Radio Terminal Modem. Inputs from synchronous data users
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are multiplexed (combined) into a single supergroup output and supplied to the modem in the
terminal radio equipment for transmission. Received supergroup(s) are demultiplexed (recombined)
into their composite parts and supplied to respective data users.
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nized. Time division principles used in multiplexing and demultiplexing operations.
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b. Capabilities and Features.
ATACS and TRI-TAC Compatible. Processes ATACS 6-bit PCM and TRI-TAC CVSD signal families.
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Operator Programmable. Operator enters configuration information by means of a front panel
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mounted keyboard. A 3-line, 96-character display presents configuration information or instructional
messages to the operator.
Non-Volatile Memory (NVM). Configuration data that has been entered is retained in NVM during
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electrical power interrupt and equipment turn-off periods.
Voice Orderwires. A 16 kb/s digital voice orderwire is selectable to secure or non-secure mode
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of operation. Additionally, models V3 and V4 have a separate 2.4 kb/s digital voice orderwire
capability.
Built-in Test Circuits. Performance parameters are constantly monitored. Detected faults are dis-
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played as discrete alarm indications or circuit card fail messages on the front panel display.
Rack Mounted. Mounted in standard 19-inch equipment rack. Secured to rack by quick-disconnect
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slides and front panel fasteners.
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