![]() ![]() ![]() ![]() ![]() |
DDT-4634 & DDR-4634: Quad 3G/HD/SD-SDI/ASI Fibre Optic Link |
||
FEATURES: |
||
GENERAL: |
||
The IRT DDT-4634 and DDR-4634 are quad transmit and receive modules designed principally for use as four independent serial data fibre optic transmission links for 3G-SDI, HD-SDI or SD-SDI applications conforming to SMPTE standards 424M, 292M and 259M-C using 9/125 µm single mode fibre |
||
|
||
TECHNICAL SPECIFICATIONS: |
||
DDT-4634:
|
|
Input serial data signal
|
2.97 Gb/s (3G-SDI) to SMPTE 424M;
1.485 Gb/s (HD-SDI) to SMPTE 292M; 270 Mb/s (SD-SDI) to SMPTE 259M-C and DVB-ASI. |
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-SDI) with Belden 1694A
(typ. 110m);; > 100 m at 1.485 Gb/s (HD-SDI) with Belden 1694A (typ. 160m); > 250 m at 270 Mb/s (SD-SDI/ASI) with Belden 8281 (typ. > 300m). |
Input Connector
|
4 x BNC on rear panel, 1 per channel. |
DDR-4634:
|
|
Number of Outputs
|
1 per channel, 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
|
4 x BNC on rear assembly, 1 per channel.
|
Optical:
|
|
DDT-4634 Optical Output
|
0 dBm +4.5/-0 dB CWDM DFB laser.
|
DDR-4634 Optical Input
|
APD detector, -9 to -27 dBm input level at 3G-SDI, typically < -30 dBm at HD/SD-SDI.
PIN detector, -3 to -18 dBm input level at 3G-SDI, typically < -20 dBm at HD/SD-SDI. |
Available Wavelengths
|
CWDM DFB laser - 1510nm, 1530nm, 1550nm & 1570nm (standard).
Other wavelengths combinations available on request. |
Optical Path Loss3,4
|
9 to 27 dB at 3G-SDI, typically >30 dB at HD/SD-SDI, APD detector;
3 to 18 dB at 3G-SDI, typically >20 dB at HD/SD-SDI, 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
|
4 x LC/PC (standard) on rear - direct connection to main card, 1 per channel;
1 x SC/PC (standard) with CWDM option fitted. |
Power Requirements:
|
|
Voltage
|
28 Vac CT (14-0-14) or ±16 Vdc.
|
Power consumption
|
DDT-4634 < 6.0 VA, DDR-4634 < 6.5 VA.
|
Other:
|
|
Temperature range
|
0 - 50°C ambient.
|
Mechanical
|
Suitable for mounting in IRT 19" rack chassis with input, output and power connections on the rear panel.
|
Finish: Front panel
|
Grey background, black lettering & red IRT logo.
|
Rear Panel
|
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 1510/1530/1550/1570nm CWDM combiner - SC/PC optical connector (standard).
|
CWDM Order Codes
|
DDT-4634/CWDM & DDR-4634/CWDM.
|
NOTE 3:
|
Typical values based using DFB laser. Optical attenuators supplied for DDR-4634 when optical path loss is less than 3dB for PIN detector and 9dB for APD detector.
|
4:
|
With CWDM option fitted for combined use on a single fibre, optical path loss is reduced by approximately 2.5dB.
|
![]() ![]() ![]() ![]() ![]() ![]() |
DDT-4634:
Separate Tx Fibres (Standard) |
DDT-4634:
Single Fibre CWDM version (Option) |
DDR-4634:
Separate Rx Fibres (Standard) |
DDR-4634:
Single Fibre CWDM version (Option) |
Due to our policy of continuing development, these specifications are subject to change without notice.
|