HD-SDI Repeaters for Long-Distance Digital HD-CCTV Extend HD-CCTV Links up to 1.0 km with Power Over Cable and Camera Control Link Over Single Coax Cable Implementation Each repeater supports a data rate of 2.97 Gbit/s (3G-SDI). A link of up to 220m can be achieved with a data rate of 1.485 Gbit/s, depending on cable quality*. For longer cable lengths, lower speed camera are supported. For example, a cable length of 720m supports SDI cameras. Up to five repeater units can be daisy chained together, all powered over the coax cable by the first repeater. Summary Microchip’s EQCO-SDI30-7501 is an extender solution for HD-SDI links, operating over a standard 75Ω coax cable. Each unit receives an attenuated HD-CCTV signal and extends it up to 220m over the coax cable. The repeater contains three critical components to correct and then retransmit the signal: ■ Adaptive Equalizer to return the signal to its original amplitude and modulation ■ Reclocker to resynchronize the signal—bringing it back to its original condition ■ Cable Driver to retransmit the signal with its original characteristics restored The repeater design offers these unique benefits: ■ Power can be transmitted from the recorder (DVR) side to the camera over the coax cable ■ Up to five repeaters may be powered from the first repeater at the DVR side over the cable; if only one or two repeaters are used, the remaining power may also be adequate to power the SDI camera at the remote end ■ A control signal (RS485) can be transmitted from the recorder (DVR) side to the camera over the coax cable The repeater enables simultaneous signal transmission camera control, and power, over a single cable. The repeater nearest the recorder can be provided with the system power and the camera control signals. Similarly, the control signals and power (if needed) can be fed to a camera by the nearest repeater to it. Camera control is accomplished via RS485, the most commonly used communications protocol. It supports a control signal bandwidth of up to 38.4 kbps. DVR Side Repeater Including Link Power and Control Channel To DVR AC Adapter From Camera HD-SDI Repeater Power Control In-Line HD-SDI Repeater HD-SDI Repeater Camera Side HD-SDI Repeater with Power and Control HD-SDI Repeater Power Control 12V or 24V DC-DC *Subject to maximum cable attenuation, see back for details. HD SDI Technical Specifications HD-SDI Interface Connectors BNC True 75Ω Cable Impedance 75Ω ± 3Ω Data Throughput 270 Mbps, 1.485 Gbps, 2.97 Gbps Aux Interface Connector (Head End) Plug connector Cable Type Category 3 or above Signaling RS485 in (Pair 1) RS485 out (Pair 2), Gnd (Pair 3), +24V (Pair 4) Power Supply Input (Head End Input) Aux Power in via Plug Connector 24V @ 720 mWatts, plus any concatenated repeaters DC Feed via Coax Min. 9V–24V DC, rated current 0.5–2A Power Supply Output (Camera Side Output) Aux Power out via Plug Connector Vin @ Head End −1V-Coax DC drop (varies with cable type/length) DC Feed via Coax Vin @ Head End −1V-Coax DC drop per hop (varies with cable type/length) Environmental Operating Temperature 0°C to +50°C Relative Humidity Up to 85% non-condensing Storage Temperature −20°C to +70°C Performance Specifications Max. Coax Length for Error-Free Operation @ 1.5 Gbps Max. Coax Length for Error-Free Operation @ 3.0 Gbps RG6 Sample 1 (16 dB/100m) (Belden 1694A) 200 meters/ 720 feet RG6 Sample 2 (16 dB/100m) (Carol Brand) Performance by Coax Type Cable/Power Budget Max # Repeaters (Total Length) DC Power After Two Repeaters 120 meters/ 390 feet 5 (1 km) 6W 200 meters/ 720 feet 120 meters/ 390 feet 3 (600m) 1.8W 5C-HFBT Sample (16dB/100m) (Amphenol) 200 meters/ 720 feet 120 meters/ 390 feet 5 (1 km) 6W RG59 Sample (23 dB/100m) 153 meters/ 502 feet 83 meters/ 272 feet 5 (700m) 6.5W 3C-2V Sample 1 (41 dB/100m) (Hangzhou Linan Tongda Cable Co., Ltd.) 85 meters/ 280 feet 47 meters/ 154 feet 5 (390m) 6.5W RG11 Sample (10 dB/100m) (CommCcope F1160BVV) 350 meters/ 1150 feet 192 meters/ 630 feet 4 (1.3 km) 4W www.microchip.com Visit our web site for additional product information and to locate your local sales office. Microchip Technology Inc. • 2355 W. Chandler Blvd. • Chandler, AZ 85224-6199 Information subject to change. The Microchip name and logo and the Microchip logo are registered trademarks of Microchip Technology Incorporated in the U.S.A. and other countries. All other trademarks mentioned herein are property of their respective companies. © 2014, Microchip Technology Incorporated. All Rights Reserved. Printed in the U.S.A. 2/14 DS00001676A