Transmission Type:
HDB3 encoded Alternate Mark Inversion to CCITT G.703 Recommendations.

75ohm Transmit level:
2.2 volts nominal 2.37 volts max 60% duty cycle. 1mW into 75ohm RG59 coax. Master/slave timing selected by front panel switches.

120ohm Transmit level:
2.8 volts nominal 3.05 volts max 60% duty cycle. 1mW into 120ohm twisted pair. Master/slave timing selected by front panel switches.

G.703 I/F connection:
Via either a pair of SMB sockets or a single RJ45 socket for each converter on rear of unit.
SMB terminations are matched for 75 ohm coaxial cable and are isolated from each other.

Cables 3m long provided on request to adapt from SMB to standard BNC sockets.
RJ45 connectors are provided for alternative connection to 120 ohm twisted pair cable.

DTE I/F connection:
Via 15 way D type socket for each converter on rear of unit.

Mains via 2 IEC connectors on rear of unit.

Recessed front panel switches give easy set up of user configuration plus a comprehensive range of test modes to ease and verify installation without external test equipment.