OTX627 COFDM Digital Video Transmitter User's Guide & Operating Manual REV. A – 14 Jan 2009 http://www.avalonrf.com/ Avalon RF, Inc. • 344 Coogan Way • El Cajon, CA 92020 Phone: (619) 401-1969 • Fax: (619) 401-1971 • Email: sales@avalonrf.
AVALON RF, INC.
AVALON RF, INC. OTX627 Series User’s Guide & Operating Manual 1. 2. 3. Page iii Table of Contents General ................................................................................................1 Figure A – OTX Series Controls and Connectors.................................3 Video ...................................................................................................4 Audio ...................................................................................................
AVALON RF, INC. OTX627 Series User’s Guide & Operating Manual 1. Page 1 General The OTX series rugged transmitters are intended for use in military, homeland security, mobile security, broadcast and motion picture production. The OTX Series is a digital video transmitter using COFDM for robust wireless video. The unit has 16 channels within a frequency range of 2.4GHz-2.483GHz and an optional extended range of 2.05GHz2.5GHz (for defense or licensed users only).
AVALON RF, INC.
AVALON RF, INC.
AVALON RF, INC. OTX627 Series User’s Guide & Operating Manual 1.1 Page 4 Video. Depending on the model, the unit features either 1 or 2 video inputs. The video inputs are standard 75 ohm impedance and accept composite video with negative sync tips. In case of dual video inputs, the switchover between Video A & Video B can be made via a serial mode command. 1.2 Audio. The audio interface is stereo. Both left & right channels are balanced line level inputs. The input impedance is high – 100K. 1.
AVALON RF, INC. OTX627 Series User’s Guide & Operating Manual 2. Page 5 Specifications & Interfaces RF Specifications RF Output: RF Impedance: Frequency Range: +27 dBm max. (3 selectable power levels) 50 ohms ISM bands - 900 MHz (902-928 MHz) 2.4 GHz (2.40 – 2.483 GHz) Other frequency bands available in UHF, L band & S band (for military, government or if user has licensed frequencies) over the frequency range of 250 MHz – 2.
AVALON RF, INC. OTX627 Series User’s Guide & Operating Manual Page 6 Meta Data (Telemetry/User Data) (Option) Data Interface: Baud Rate: RS232C, 8N1 setting 38.4K Control Interface Interface: Baud Rate: Usage: RS232C, 8N1 upto 38.4K User loadable Frequency list of Channels through GUI; SID (system ID settable for each channel) Power Input: Consumption: 12V nominal; 9- 20V DC Unregulated 6W typical @ max.
AVALON RF, INC. OTX627 Series User’s Guide & Operating Manual 2.1 Page 7 User Interface. a) On/Off Switch. The OTX series transmitters have a electronic on/off switch. The switch must be held pressed for at least 3 sec to turn the unit on or off. This shuts off power to the entire transmitter. b) Power on LED. This is a red led to indicate the unit is turned on. c) Status LED The status led is bi-color and indicates normal operation or programming mode. d) Hands Free Back Channel (optional).
AVALON RF, INC. OTX627 Series User’s Guide & Operating Manual Page 8 b) The input is electronically switched and protected against reverse polarity. There is also a ‘under-voltage lockout’ mechanism which ensures that there is at least the minimum operating voltage present to turn on the transmitter. In case the input voltage is lower than the minimum, the transmitter will not turn on. The user will see only a brief flash of the red led.
AVALON RF, INC. OTX627 Series User’s Guide & Operating Manual Page 9 2.3.5 Two Way Wireless Digital Link (WDL) (Option 11) The WDL is a 9.6KBaud (standard, other Baud rates are supported) Half-Duplex RS485 compatible serial interface. 2.3.6 Main RF output to antenna. The main RF output connector is a 50 Ω (ohm) female SMA receptacle. 2.3.7 Wireless Digital Link (WDL) RF output. The WDL RF output is via a 50 Ω (ohm) BNC connector. Maximum output power is +24 dBm (0.25W).
AVALON RF, INC. OTX627 Series User’s Guide & Operating Manual 2.4 Page 10 Interconnecting. All interfaces to/from the transmitter are available through the following connectors: 2.4.1 a) Power Input. Pin Function Number 1 Power Return (-) 2 3 4 Power Input (+) Figure C – Power b) Video Input. Depending on the model, there is provision for 1 or 2 video input signals. In case of the single video input, the connector is a 75 Ω (ohm) BNC while the 2 video inputs style has a 75 Ω (ohm) MiniBNC connector.
AVALON RF, INC. OTX627 Series User’s Guide & Operating Manual Page 11 c) Audio Input. Pin Number 1 2 3 4 5 Function Audio Return Audio L + Input Audio R + Input Audio R - Input Audio L - Input Figure E – Audio d) Data/Programming Input.
AVALON RF, INC. OTX627 Series User’s Guide & Operating Manual 2.5 Page 12 Mechanical 2.5.1 Mounting. Clamping (or hard mounting) is the only method of mounting advised for all fixed installations. Avalon RF has a special mounting plate available. Please ask for details. For mobile camera usage, Anton Bauer mounting is also available at extra cost. Please contact us for details. The transmitter is designed for convection (free air flow) cooling and no forced air-cooling (such as a fan) is necessary.
AVALON RF, INC.
AVALON RF, INC. OTX627 Series User’s Guide & Operating Manual 2.6 Environmental Conditions. Page 14 The OTX Series is designed to meet the following environmental conditions: 2.6.1 Operating temperature -4° to 122° F -20° to 50° C 2.6.2 Storage temperature -13° to 150° F -25° to 65° C 2.6.3 Vibration 1.5G, from 10Hz to 2KHz, sine wave, 3 axis 2.6.4 Shock 15G, 25msec, half sine wave, three axis 2.6.5 Humidity 5 to 95%, non-condensing 2.6.6 Inclination Any 2.6.
AVALON RF, INC. OTX627 Series User’s Guide & Operating Manual 3. Page 15 Operating the transmitter. Before applying power, make sure all connectors and all antennas are hooked up. NOTE The transmitter will not transmit unless it has an antenna. 3.1 The transmitter has three operator controls and two indicators: a) On/Off switch. The On/Off control is an electronic circuit & the switch must be kept pressed for 3 seconds to turn the unit on or off.
AVALON RF, INC. OTX627 Series User’s Guide & Operating Manual Page 16 d) Power LED The power led is red & when lit, indicates the transmitter is on. e) Status LED This led is green during normal operation & yellow during programming/ set-up. 3.2 The wireless data link is a secondary/utility link that is used to transfer data/voice in the reverse direction. It is a narrow band UHF link operating in the low UHF license-free band.
AVALON RF, INC. OTX627 Series User’s Guide & Operating Manual 3.3 Page 17 General Guidelines The choice of a Transmitter and the Antenna to be used is dictated by power consumption, required distance of operation of the link, if it is a fixed or a mobile environment, the space constraints, the location itself (indoors or outdoors, presence of nearby objects like trees, bridges, etc.) and etc. Avalon RF will work with the user to determine the right combination.
AVALON RF, INC. OTX627 Series User’s Guide & Operating Manual Minimum Distance from Body (in Inches) Power @ 2.4 Antenna 0 dBi 3 dBi 10 dBi 16 dBi GHz Gain +20 dBm 2” 3” 4” 8” (100mW) +24 dBm 3” 4” 8” 16” Distance (250mW) +27 dBm 6” 9” 16” 32” (500mW) Table 4 – Minimum Safe Distance Page 18 27 dBi 48” 84” WARNING: An Antenna extender cable shipped with the OTXXX is meant to hold the antenna at the minimum safe distance from the human body.
AVALON RF, INC. OTX627 Series User’s Guide & Operating Manual Page 19 Warranty The Avalon RF Warranty covers Mechanical and Electrical defects for each of the components in your Avalon RF equipment. We will repair or replace the defective part at our cost during the warranty period. Cost is defined as the cost of the component(s) plus our time to install and test the replacement part. Warranty covers parts and labor.
