4280-dda.ib.rev0.doc
Page 5 of 17
11/03/2009
Technical Specifications
IRT Eurocard module
Type DDA-4280
In accord with ITU-T Rec. G.703 –
see
Electrical characteristics of G.703 signals
.
Input:
Type
Transformer coupled.
Impedance
75
Ω
terminated.
Outputs:
Number
1 switched, 3 non-switched, regenerated, reclocked shaped outputs located
on rear connection assembly and 1 located on front panel.
Impedance
75
Ω
source terminated.
Electrical Characteristics:
Cable Type
Coaxial
Other
See G.703 Specification for 2.048Mb/s data rate
Controls & alarms:
Input:
External changeover request
A ground applied to this input will emulate the operation of the front
panel switch “Change Request”.
Outputs:
Power failure
Contact to open circuit if power has failed.
General alarm
Contact to open circuit if
Data Loss is detected OR AIS is detected
Connectors:
Data:
BNC
Alarm:
Krone LSA plus
Indicators:
Data loss.
AIS detect.
Module in service.
Module in standby.
Power requirements
28 Vac CT (14-0-14) or
±
16 Vdc.
Power consumption
< 4 VA
Temperature range
0 - 50° C ambient
Mechanical
Suitable for mounting in IRT 19" rack chassis types with input output and
power connections on the rear panel.
Finish:
Front panel:
Grey background, black lettering & red IRT logo.
Rear assembly:
Detachable silk-screened PCB with direct mount connectors to Eurocard
and external signals.
Dimensions
6 HP x 3 U x 220 mm IRT Eurocard
Standard accessories
Rear connector assembly.
Optional accessories
ZDA-4300RH Double width rear assembly for handshake connection of
two DDA-4280's (number of outputs drops to 3).
Due to our policy of continuing development, these specifications are subject to change without notice.