Fiber Optic Scaling Receiver for HDMI, Audio, and RS-232
Key Features
  • Accepts fiber optic signals from a FOX Series transmitter, and provides scaled HDMI video, stereo audio, and RS-232 control signals
  • High performance scaler provides selectable output resolutions up to 1920x1200, including HDTV 1080p/60 and 2K
  • HDCP compliant
  • Key Minder® continuously verifies HDCP compliance for quick, reliable switching
  • HDMI, DVI, RGB, and HD component video upscaling and downscaling
  • Modular, hot-swappable board designed for the PowerCage 1600 enclosure, part # 60-978-01
The Extron PowerCage FOX SR HDMI
Model Version Description Part #
PowerCage FOX SR HDMI MM Scaling Receiver - Multimode 70-904-21
PowerCage FOX SR HDMI SM Scaling Receiver - Singlemode 70-904-22

The Extron PowerCage FOX SR HDMI Fiber Optic Extender is a modular scaling receiver for the PowerCage® 1600 enclosure that enables long haul transmission of HDCP-compliant HDMI video, stereo audio, and RS-232 control signals over fiber optic cabling. Engineered for exceptional high resolution performance, it uses Extron all-digital technology to deliver perfect pixel-for-pixel HDMI computer-video images up to WUXGA 1920x1200, including HDTV 1080p/60. Designed specifically for AV systems, the PowerCage FOX SR HDMI includes many integrator-friendly features such as Key Minder®, audio de-embedding, selectable HDMI audio pass-through, Auto Input Memory, and internal test patterns.

As part of the extensive FOX Series of fiber optic products from Extron, the PowerCage FOX SR HDMI is compatible with FOX Series HDMI, DVI Plus, DVI, VGA, and VGA/YUV transmitters. In addition, it can support long distance transmission and scaling of HDCP content, and can be used in combination with FOX Series switchers and matrix switchers to create an enterprise-wide, HDCP-compliant distribution system.

This modular receiver is ideal for a wide range of long distance applications requiring scaling of high resolution content with the highest quality. It includes high performance scaling technology that accepts input signals at a variety of resolutions and offers multiple output rates up to 1920x1200, including HDTV 1080p/60. The built-in scaler simplifies integration of sources and displays of different resolutions. It provides support for audio and RS-232 control signals, while allowing HDMI, DVI, RGB, and HD component video signals to be scaled to the optimal resolution for the destination device. Because transmission of content is inherently secure and immune to outside interference, fiber applications are favored in government, military, and medical environments.

The PowerCage FOX SR HDMI features Key Minder to simplify integration of HDMI-equipped devices. For HDMI signals with protected content, Key Minder continuously authenticates HDCP compliance to ensure quick and reliable switching in professional AV environments, while enabling simultaneous distribution of a single source signal to one or more displays. If HDCP-encrypted content is sent to a non-compliant display, the receiver outputs a full-screen green signal to provide immediate visual notification that protected content cannot be viewed on the selected display.

The scaling receiver provides industry standard LC-type connectivity, and is available in two formats: multimode and singlemode. The PowerCage FOX SR HDMI MM model supports multimode fiber at 850 nm, which is typically used within buildings or facilities with moderate-range transmission distances. The PowerCage FOX SR HDMI SM model supports singlemode fiber at 1310 nm, offering long-range transmission capability over extreme distances of up to 30 km (18.75 miles). It is used in large facilities such as airports and stadiums, as well as connecting over long distances between facilities such as at a university campus or medical complex.

Analog RGB/HD Component-to-HDMI Conversion

The PowerCage FOX SR HDMI is ideal for AV systems that include a variety of digital and analog displays and sources at different resolutions. Pairing the scaling receiver with a FOX Series VGA or VGA/YUV transmitter provides easy conversion of analog RGB/HD component to HDMI for non-HDCP content. The built-in scaler ensures an optimal resolution for the display.


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PowerCage™ FOX SR HDMI
 NOTE     The PowerCage FOX SR HDMI board is not compatible with the FOX 3G HD-SDI, FOX 3G DVC, or FOX AV models.
 NOTE     The PowerCage FOX SR HDMI board is available in singlemode or multimode version.
 NOTE     The PowerCage FOX SR HDMI board is a class 1 laser product. It meets the safety regulations of IEC-60825, FDA 21 CFR 1040.10, and FDA 21 CFR 1040.11.
Optical fiber interconnection between transmitter and receiver
   Number/type 1 singlemode or 1 multimode fiber optic input and output per FOX board
    NOTE     Only one fiber is required to transmit video, audio, and unidirectional data. A second fiber is required to transmit HDMI video with HDCP content or return data for bidirectional control and communication.
   Connectors 2 bidirectional LC connectors per FOX board
   Operating distance 
      Singlemode 30 km (18.75 miles) with singlemode (SM) cables with a SM board
      Multimode 300 m (985') with 62.5 µm OM1 multimode (MM) cable and a MM board
1 km (3280') with 50 µm OM2 multimode (MM) cable and a MM board
2 km (6561') with 50 µm OM3/OM4 2000 MHz bandwidth laser optimized MM cable and a MM board
    NOTE     Operating distance is approximate. These are typical distances. The maximum distance may be greater than these typical numbers depending on factors such as fiber type, fiber bandwidth, connector splicing, losses, modal or chromatic dispersion, environmental factors, and kinks.
   Nominal peak wavelength 850 nm for multimode (MM), 1310 nm for singlemode (SM)
   Transmission power, singlemode or multimode -5 dBm, typical
   Maximum receiver sensitivity 
      Singlemode -18 dBm, typical
      Multimode -12 dBm, typical
   Optical loss budget 
      Singlemode 13 dB, maximum
      Multimode 7 dB, maximum
   Maximum channel data rate 4.25 Gbps
Video processing
   Digital sampling 24 bit, 8 bits per color, 165 MHz standard
   Colors 16.78 million
Video output
    NOTE     Appropriate HDMI to DVI-D cables or adapters are required for DVI signal output.
   Number/signal type 1 single link HDMI (HDCP compliant)
   Connectors 1 female HDMI type A
   Nominal level 0.8 Vp-p
   Video delay 1-2 frames
   Scaled resolution 640x4806,8,9, 800x6006,8,9, 852x4806,8,9, 1024x7686,8,9, 1024x8526,8,9, 1024x10246,8,9, 1280x7686,8,9, 1280x8006,8,9, 1280x10246,8,9, 1360x7656,8,9, 1360x7686,8,9, 1365x7686,8,9, 1365x10246,8,9, 1366x7686,8,9, 1400x10506,8, 1440x9006,8,9, 1600x12006,8, 1680x10506,8, 1920x12006,8
HDTV: 480p7,8, 576p6, 720p3,4,5,6,7,8, 1080i6,7,8, 1080p1,2,3,4,5,6,7,8, 2048x10801,2,3,4,5,6,7,8
       1 = 23.98 Hz, 2 = 24 Hz, 3 = 25 Hz, 4 = 29.97 Hz, 5 = 30 Hz, 6 = 50 Hz, 7 = 59.94 Hz, 8 = 60 Hz, 9 = 75 Hz
    NOTE     In PowerCage FOX boards, the analog audio signals are digitized in the transmitter, sent through the fiber cable, and converted back to analog audio in the receiver.
      Range Adjustable, -18 dB to +10 dB
      Default Unbalanced output: -6 dB; balanced output: 0 dB
   Frequency response 20 Hz to 20 kHz, ±0.5 dB
   THD + Noise 0.10% @ 1 kHz at nominal level
   S/N >80 dB at maximum output (unweighted)
   CMRR 65 dB @ 20 Hz to 20 kHz
   Audio bits per sample 18 bits per channel, 2 channels (L, R)
   Sampling rate 48 kHz
Audio output
   Number/signal type 1 stereo, balanced/unbalanced or
2 mono, balanced/unbalanced
   Connectors (1) 3.5 mm captive screw connector, 5 pole
   Impedance 50 ohms unbalanced, 100 ohms balanced
   Nominal level -10 dBV (316 mVrms)
   Maximum level (Hi-Z) >+11.0 dBu, balanced at 1% THD+N
   Maximum level (600 ohm) >+10.0 dBu, balanced at 1% THD+N
   Audio delay 1.5 frames
   Serial control ports 
      Control 1 bidirectional RS-232, 3.5 mm captive screw connector, 5 pole (uses 3 poles; shared with the alarm port)
      Pass-through 1 RS-232, 3.5 mm captive screw connector, 5 pole (3 pins are used, "RS-232 Over Fiber")
   Baud rate and protocol 
      Control 9600 baud, 8 data bits, 1 stop bit, no parity
      Pass-through 9600 to 115,200 baud
   Serial control pin configuration 1 = Tx, 2 = Rx, 3 = GND
   Program control Extron control/configuration program for Windows®
Extron Simple Instruction Set (SIS)
   Power Supplied by a PowerCage 1600 enclosure
   Power consumption 8.8 watts
   Power input requirements 12 VDC, 1.0 A, supplied by the PowerCage enclosure
   Temperature/humidity Storage: -40 to +158 °F (-40 to +70 °C) / 10% to 90%, noncondensing
Operating: +32 to +122 °F (0 to +50 °C) / 10% to 90%, noncondensing
   Cooling Enclosure: fans, front to back
Boards: convection, within the PowerCage enclosure
   Thermal dissipation 29.8 BTU/hr
   Dimensions Each board fits a double slot opening in a PowerCage enclosure.
   Product weight 1.1 lbs (0.5 kg)
   Shipping weight 2 lbs (1 kg)
   Vibration ISTA 1A in carton (International Safe Transit Association)
   Regulatory compliance 
      Safety CE, c-UL, FDA Class 1, UL
      EMI/EMC CE, C-tick, FCC Class A, ICES, VCCI
      Environmental Complies with the appropriate requirements of RoHS, WEEE.
   Product warranty 3 years parts and labor
    NOTE     All nominal levels are at ±10%.
    NOTE     Specifications are subject to change without notice.
Shipping Dimensions and Weights
    Part # Height Width Depth Weight
    70-904-21 2.62" (6.7 cm) 9.0" (22.9 cm) 13.38" (34.0 cm) 1.61 lbs (0.73 kg)
    70-904-22 2.62" (6.7 cm) 9.0" (22.9 cm) 13.38" (34.0 cm) 1.61 lbs (0.73 kg)


Application Diagram

Panel Drawing

Panel Drawing
© 2020 Extron. Specifications are subject to change without notice.