DTR-4630
I.R.
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Communications
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Page 6 of 17
Revision 02
TECHNICAL SPECIFICATIONS
Transmitter:
Input serial data signal 2.97 Gb/s (3G- DI) to MPTE 424M;
1.485 Gb/s (HD- DI) to MPTE 292M;
270 Mb/s ( D- DI) to MPTE 259M-C and DVB-A I.
Input impedance 75 Ω.
Input return loss > 15 dB 5 MHz to 1.5 GHz;
> 10 dB 1.5 GHz to 2.97 GHz.
Automatic cable compensation > 100 m at 2.97 Gb/s (3G- DI) with Belden 1694A (typ. 110m);
> 100 m at 1.485 Gb/s (HD- DI) with Belden 1694A (typ. 160m);
> 250 m at 270 Mb/s ( D- DI/A I) with Belden 8281 (typ. >300m).
Input connector 2 x BNC on rear panel, with IN 1 taking priority & IN 2 automatically switching in on
loss of IN 1.
Output connector 1 x BNC (OUT 1) on rear panel, link selectable Tx input monitor, or nil if set as a second Rx output.
Receiver:
Number of outputs 2 data reclocked,
AC coupled.
Output level 800 mV ± 10%.
Output impedance 75 Ω.
Output return loss > 15 dB 5 MHz to 1.5 GHz;
> 10 dB 1.5 GHz to 2.97 GHz.
Output rise and fall time < 135 ps at 2.97 Gb/s and 1.485 Gb/s;
> 0.4 ns and < 1.5 ns at 270 Mb/s.
Intrinsic jitter < 0.3 UI at 2.97 Gb/s reclocked;
< 0.2 UI at 1.485 Gb/s reclocked;
< 0.1 UI at 270 Mb/s reclocked.
Output connector 2 x BNC on rear assembly, or 1 x BNC if OUT 1 has been link selected as an input monitor.
Optical:
Optical output 0 dBm +4.5/-0 dB CWDM DFB laser.
Optical input APD detector, -9 to -27 dBm input level at 3G- DI, typically < -30 dBm at HD/ D- DI.
PIN detector, -3 to -18 dBm input level at 3G- DI, typically < -20 dBm at HD/ D- DI.
Available wavelengths 1310nm or 1550nm. Other wavelengths available upon request.
Optical path loss
4, 5
9 to 27 dB at 3G- DI, typically >30 dB at HD/ D- DI, APD detector;
3 to 18 dB at 3G- DI, typically >20 dB at HD/ D- DI, PIN detector.
(Optical path loss = Laser O/P power – Detector I/P power)
Optical fibre Designed for use with 9/125 μm single mode fibre.
Optical connector 2 x C/PC (standard) on rear – direct connection to main card, 1 Tx and 1 Rx; or
1 x C/PC (standard) with WDM option fitted.
Power Requirements:
oltage 28 Vac CT (14-0-14) or ±16 Vdc.
Power consumption < 5.0 VA.
Other:
Temperature range 0 - 50° C ambient.
Mechanical For mounting in IRT 19" rack chassis with input, output and power connections on the
rear panel.
Finish Front panel Grey, 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.
Optional accessories On-board 1310/1550nm WDM
6
combiner.
WDM order codes DTR-4630/1310/WDM & DTR-4630/1550/WDM.
NOTE: 4 Typical values based using DFB laser. Optical attenuator supplied for when optical
path loss is less than 3dB for PIN detector and 9dB for APD detector.
5 With WDM option fitted for combined use on a single fibre, optical path loss is
reduced by approximately 2dB.
6 With WDM module fitted, when operating as a pair, one DTR-4630 must be fitted
with a 1310nm laser and the other a 1550nm laser.
Due to our policy of continuing development, these specifications are subject to change without notice.
