The Electrical DIR Interface Module is designed for
use in the Technisys Universal Modular Chassis (701073-XX).
This electrical interface module interfaces unframed serial
to parallel electrically. Serial I/O is at STM-1 (155.520 Mbps),
E4 (139.264 Mbps) or E3 (34.368Mbps) rates via 75 Ohm SMB connectors
or NRZ at ECL levels through 50 Ohm SMB connectors. Serial
interface through 75 Ohm connectors is transformer couple line
interface, which meets appropriate telecommunication standards.
Parallel interface is made through 25 pin sub-mini D connectors.
CLOCK OUT is available through a 50 Ohm SMB connector.
Parallel I/O consists of 8 DATA bits plus CLOCK and (3) additional
signals; TAPE SYNC, FRAME SYNC and ERROR. Front panel controls
include data rate select, CLOCK OUT SELECT and RECORD and PLAYBACK
status indicators. SERIAL or PARALLEL mode and LED ON/OFF are select
by toggle switches located on the front panel. SERIAL or PARALLEL
mode and LED ON/OFF are select by toggle switches located
on the front panel.
Fiber optic I/O can be changed to multi mode and other wave lengths,