DDT 4620 & DDR Brochure DDT_4620 DDR_bro Bro
User Manual: 4620-DDT_4620-DDR_bro
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No Longer Available For Reference Purposes Only DDT-4620 & DDR-4620 3G/HD/SD-SDI/ASI Fibre Optic Link FEATURES GENERAL • One type covers 2.97 Gb/s 3G-SDI, 1.485 Gb/s HD-SDI or 270 Mb/s SD-SDI & ASI signals. • Path lengths up to 30 dB1 optical path loss using 9/125μm single mode fibre. • Fibre, video and alarm connections at rear. • Optional plug-in SNMP monitoring module. • LED indicators and external alarm contacts. BLOCK DIAGRAM DDT-4620 & DDR-4620 SIGNAL PATH DDT-4620 3G-SDI HD-SDI SD-SDI ASI I/P Fibre O/P SNMP Alarm O/P DDR-4620 Fibre Link * 9-27 dB path loss at 3G (>30dB at HD and SD) O/P 1 O/P 2 Fibre I/P SNMP Alarm O/P NOTE: * Fitted with APD detector. 3-18dB when fitted with PIN detector. 3G-SDI HD-SDI SD-SDI ASI The IRT DDT-4620 and DDR-4620 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 using 9/125 μm 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. In addition, the link may be used for ASI transport streams for use with MPEG compressed video streams or other 270 Mb/s type data. The transmitter features automatic input cable equalisation. The unit can be configured with lasers of various wavelengths. LED indicators are provided for digital signal presence, DC power and LASER output power out of range. A link selectable “keep link alive” signal is available to maintain optical link operation when no electrical input is present. The receiver uses a choice of either a PIN photodiode or APD detector with signal conditioning and reclocking circuits. The data rate is automatically set to match the 3G-SDI, HD-SDI or SD-SDI rates dependent on the actual input data rate to the transmitter. Two serial digital outputs are provided. LED indicators are provided for digital signal presence, signal type, optical loss and power. Relay contact outputs are also provided for external use of alarm signals on both modules. An optional SNMP (Simple Network Management Protocol) plug-in module is available, for each unit, for remote monitoring when used in conjunction with an IRT frame fitted with SNMP capability. Both the DDT-4620 and DDR-4620 are Eurocard modules designed to fit IRT’s current range of 1RU 1000 series and 3RU 4000 series Eurocard frames. 1 27dB path loss at 3G. Typically >30dB at HD and SD. Fitted with APD detector. Due to our policy of continuing development, these specifications are subject to change without notice. IRT Electronics Pty Ltd | www.irtelectronics.com No Longer Available - For Reference Purposes Only DDT-4620 & DDR-4620 TECHNICAL SPECIFICATIONS DDT-4620: Input serial data signal Input impedance Input return loss Automatic Cable compensation Input Connector 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 and DVB-ASI. 75 Ω. > 15 dB 5 MHz to 1.5 GHz; > 10 dB 1.5 GHz to 2.97 GHz. > 100 m at 2.97 Gb/s with Belden 1694A (typ. 130m); > 100 m at 1.485 Gb/s with Belden 1694A (typ. 170m); > 250 m at 270 Mb/s with Belden 8281 (typ. >300m). 1, BNC on rear panel. DDR-4620: Number of outputs 2 data reclocked, AC coupled. 800 mV ± 10%. 75 Ω. > 15 dB 5 MHz to 1.5 GHz; > 10 dB 1.5 GHz to 2.97 GHz. < 135 ps at 2.97 Gb/s and 1.485 Gb/s; > 0.4 ns and < 1.5 ns at 270 Mb/s. < 0.3 UI at 2.97 Gb/s reclocked; < 0.2 UI at 1.485 Gb/s reclocked; < 0.2 UI at 270 Mb/s reclocked (typically < 0.1 UI). 2, BNC on rear assembly. Output level Output impedance Output return loss Output Rise and Fall Time Intrinsic Jitter Output Connector Optical: DDT-4620 optical output DDR-4620 optical input Optical fibre Optical connectors 0 dBm +4.5/-0 dB CWDM DFB laser. 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. CWDM DFB laser - 1270nm, 1290nm, 1310nm 1330nm, 1350nm, 1410nm, 1430nm, 1450nm, 1470nm, 1490nm, 1510nm, 1530nm, 1550nm, 1570nm, 1590nm & 1610nm. 9 to 27 dB at 3G-SDI, typically >30 dB at HD/SD-SDI, APD detector; 3 to 18 dB PIN detector. (Optical path loss = Laser O/P power – Detector I/P power) Designed for use with 9/125 μm single mode fibre. SC/PC (standard). Power Requirements: Voltage Power consumption 28 Vac CT (14-0-14) or ±16 Vdc. DDT-4620 <4.0 VA, DDR-4620 <4.5 VA. Other: Temperature range Mechanical Finish Front panel Rear assembly Dimensions Optional accessories 0 - 50° C ambient. For mounting in IRT 19" rack chassis with input, output and power connections on the rear panel. Grey, black lettering & red IRT logo. Detachable silk-screened PCB with direct mount connectors to Eurocard and external signals. 6 HP x 3 U x 220 mm IRT Eurocard. SMU-4000 SNMP plug in module for use with 4000 series frame fitted with SNMP “Agent”. Available wavelengths Optical path loss2 NOTE: 2 Typical values based using DFB laser. Optical attenuator supplied for DDR-4620 when optical path loss is less than 3dB for PIN detector and 9dB for APD detector. Due to our policy of continuing development, these specifications are subject to change without notice. IRT Electronics Pty Ltd | www.irtelectronics.com
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