CAM Racer

12G-SDI Dockable optical fibre transmission unit for HD / 3G / 4K / 8K Cameras.

Introduction

CAM Racer is a complete camera fibre optic transmission solution for OB Van, Studio and Cinema applications. It comprises a camera dockable transceiver and a 1RU base station unit. The CAM RACER is designed to transport all needed signals in the same device on 2 singlemode fibers of a standard SMPTE cable.

Devices intended to be used with CAM RACER starts from single HD-SDI output camera to 4K models with 4 x 3G signals output. An intermediate CAM RACER is designed to transmit 2 x 3G signals for the growing demand of shootings with Canon C300/C500 cameras and supports the LANC protocol.

Highlights

With two 12G-SDI channels plus two 3G-SDI channels the CAM Racer will fit any camera from ENG to 4K and 8K Cinema devices.

CAM Racer can deliver up to 140 Watts of power to the camera over 450 metres of standard 9.2mm SMPTE cable (100W at 600 metres). An optional automatic battery backup provides additional power in the case of a sudden increase in demand.

Signal control and setup is provided through an internal web server. Signal status is also reported on an LED display on each unit. The base station Oled display gives direct access to optical receiving levels and server IP address.

An internal audio mixer allows the user to mix between talkback, programs inputs and local audio channels for Eng and Reporter headsets.

Camera control channel supports: Ethernet, RS422 Serial, Canon RC-V100 protocol (Enhanced Lanc).

Camera synchronization supports: Two Composite Video signals and one Timecode.

Versatility

Each CAM Racer has as standard the following signal set:

  • 1, 2 or 4 SDI / HD / 3G signals from Camera (planned support for HDMI HD input),
  • 1 Viewfinder HD-SDI from basestation,
  • 1 Monitoring HD-SDI from the camera,
  • 1 Genlock from basestation (Composite video / Black burst / Tri-level),
  • 2 Bidirectionnal audio with mic preamp at camera side,
  • 1 Talkback in/out with headset interface at camera side,
  • 1 Time code from basestation,
  • 1 Ethernet 10/100 Mbs,
  • 1 Data RS 232/422/485,
  • 1 LANC signal from basestation,
  • 2 Contact closure from basestation.

Two options are available for more complex setups (4K/8K, 2 talkback channels):

  • 2 extra 12G / 6G / 3G / HD / SD signals from Camera (board add on),
  • 2nd Talkback in/out with headset interface at camera side +
    2nd Tally (Green) Contact closure from base station +
    2nd Serial data RS 232/422/485 (connector add on).

The camera unit has talkback headset interfaces suitable for all types of mic (dynamic, electret, fully static) and any earpiece impedance.
An internal audio console enables talkback, local audio channels inputs, and program inputs to be mixed onto each camera unit audio output.

Dockable

The transceiver is fitted in a V mount dockable unit able to be installed on every camera. A red/green tally LED is located on top of the unit.
A user panel has LEDs for signal presence/activity, a rotary button for volume adjustment and various level settings (sidetone, program1 / program2 listen level) and push to talk commands.
Cooling of the unit is performed by a small and silent fan located at the base of the unit.

The base station receiver is integrated in a standard 19” 1RU rack frame. All signals are on standard connectors located at the rear of the chassis. (the web server is on a separate Ethernet port).
The front of the chassis has an LED display panel indicating the status of each signal and technical alarms. An Oled display gives direct access to optical receiving levels and server IP address.
The base station has an internal mains power supply and two fans for thermal management.

Optical

Dynamic range: 15 dB for control and 3G signals, 10dB for 12G channels
Connector: LEMO 3K (EDW / FXW) or NEUTRIK OpticalCON DUO

 

Video SD/HD/3G

Connector: 3G certified BNC and 12G certified BNC
Standard: SDI, ASI, HD, 3G on basic model. SDI, HD, 3G, 6G, 12G with optional 12G channels board
Impedance: 75 Ω
Amplitude: Input: cable equalization on all channels including 12G, Output: 800 mV pp / re-clocked
Return loss: Better than: – 15 dB for 0 to 1.5 Ghz, – 10 dB for 1,5G to 3G, -6dB for 3G to 12G

 

Composite Video / GL

Number, connector: 2 from base station to camera, 2 BNC
Standard: Composite video, Black Burst, Tri-level ( Bi / Tri level auto sense )
Impedance: 75 Ω
Performance: BW > 5.8 MHz at +/- 0.2 dB, DgDp < 1%, < 1°, Group delay < 10 ns, SNR > 67 dB (CCIR567)

 

Analog Audio

Number, connector: 2 bidirectional channels, XLR 5pins on camera unit, XLR 3pins on base station
Impedance: Input: 10 KΩ differential (non floating), Output: 20Ω differential (non floating)
Amplitude: +18 dBm maximum
Bandwidth: 50 Hz to 15 KHz at +/- 0.5dB, (20 Hz to 20 KHz at -3 dB)
Distortion: 0.05% at 1Khz / 0 dBm
Signal to noise ratio: 90dB, “A” weighted

 

Mic input

Input: Microphone input gain block on the camera unit
Mic input, Gain: From -12 to 40 dB, Tunable by 1 dB steps, Totally by-passable
Phantom power: 48 volts switchable , Source Impedance 6.8 KΩ

 

Timecode

Number, connector 1 from basestation to camera unit , BNC
Impedance / Connector: 75 Ω, BNC

 

LANC

Number, connector 1 bidirectional, Jack2.5mm
Protocol Standard LANC or RC-V100 remote protocol (5V open collector signaling)

 

Data

Number, connector: 2 bidirectional channel, RJ 45 for Channel 1, Hirose 12 for channel 2
Protocols: RS485, RS422, RS232
Data rate: 0 to 500 Kbps

 

Ethernet

Number, connector: 1 channel, RJ 45
Protocols: 10 or 100 Mb/s, Full or Half-duplex (Auto sense), MDI or MDI-X (Auto sense)

 

Intercom / Tally

Number: 2 Tally, 2 Intercom
Tally Output: Relay (dry contact) shared with serial RJ45 (red)  and Hirose 12 (green). Red/Green LED
Tally Input: Contact or Voltage input. Shared on intercom D-SUB 25 pins with standard CCU pinout
Camera Intercom I/O: Any type of Headset Mic (Dynamic, Electret; Static ) and Earpiece impedance (20 to 600 Ohms)
Base st. Intercom I/O: Line levels for Intercom and program input
Talk command: Pushbutton on cam unit, PTT input on RJ45 for pocket PTT switch. (Talk latch release on base station)
Connector: XLR 5 pins (intcom1), Hirose 12 pin (intcom2), Standard D SUB 25 pins on base (Tally, Intercom, PGM)

 

Power Section

Camera unit 7 Watts for 2x3G basic device + Additional 3W for dual 12G channel option
Camera power capacity:
(standard 9.2mm SMPTE)
14.4V, 140W continuous, temporary unlimited with automatic battery backup
Decreasing for length over 400m, 100W remaining at 600m
Regular option: 8.4Volts 4Amps output for Canon devices on dedicated D-TAP
Battery plates: V-Lock or Anton Bauer (under development)
Base station unit: 10 VA for the base station (Additionally up to 200VA for remote power source)
Mains source base: From 90 to 260 VAC / 47 to 63 Hz

 

Mechanical

Camera unit: 155 * 145 * 44mm excluding connectors & plates (Add 13mm for power converter), weight 1400 grams
Base station: 1 RU 19” rack, depth 250mm excluding connectors, weight 3000 grams
Operating / Material: From -20 to + 60°C. (Avoiding direct sun exposure). Cases are built in Aluminium and Stainless steel

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