EQCO-SDI30-7501 Datasheet, PDF (1/2 Pages) EqcoLogic – EqcoLogic HD-SDI Repeaters for long-haul digital HD-CCTV

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
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.
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.
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
HD-SDI
Repeater
From Camera
Power
AC Adapter
Control
In-Line HD-SDI Repeater
HD-SDI
Repeater
Camera Side HD-SDI Repeater with Power
and Control
HD-SDI
Repeater
Power
HD
SDI
Control
12V or 24V
DC-DC
*Subject to maximum cable attenuation, see back for details.