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DDT-4630 & DDR-4630:
3G/HD/SD-SDI/ASI Fibre Optic Link | ||
FEATURES:
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GENERAL:
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The IRT DDT-4630 and DDR-4630 are transmit and receive modules designed principally for use
as a serial data fibre optic transmission link for 3G-SDI, HD-SDI or SD-SDI applications conforming to SMPTE standards 424M, 292M and 259M-C
using 9/125 ?m single mode fibre. This enables the use of space saving fibre optic cable for reliable transmission of digital video signals over
lengths greater than can be achieved with coaxial cable. | ||
TECHNICAL SPECIFICATIONS:
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DDT-4630: |
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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 |
2 x BNC on rear panel, with I/P 1 taking priority & I/P 2 automatically switching in on loss of I/P 1. |
Output Connector |
2 x BNC on rear panel, monitor outputs. |
DDR-4630: |
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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. |
Optical: |
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DDT-4630 Optical Output |
0 dBm +4.5/-0 dB CWDM DFB laser. |
DDR-4630 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 - 1270nm, 1290nm, 1310nm (standard),
1330nm, 1350nm, 1410nm, 1430nm, 1450nm, 1470nm, 1490nm, 1510nm, 1530nm, 1550nm, 1570nm, 1590nm & 1610nm. |
Optical Path Loss2 |
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 |
1 x SC/PC (standard) on rear - direct connection to main card. |
Power Requirements: |
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Voltage |
28 Vac CT (14-0-14) or ±16 Vdc. |
Power consumption |
DDT-4630 < 5 VA, DDR-4630 < 5 VA. |
Other: |
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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. |
NOTE 2: |
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. |
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DDR-4630: IN 1 & IN 2 BNC connectors not used. |
Due to our policy of continuing development, these specifications are subject to change without notice.
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