A quick trip to the station's garage did the trick-I found two old tripods that were made back when you could buy a soda for a dime, and after a bit of effort, I had the HXI units mounted solidly on their perch. The first thing was to mount the units on a solid, yet portable, platform. Upon opening the GigaLink's shipping container, it became clear that this test session was not going to require a lot of "build out." The units were well labeled and I recognized all of the buttons and connections. Unique to the receiver is the "receive level" bar graph LED meter (RSSI). Both units also include a green signal "lock" LED for each video channel. In addition, there's a green LED to indicate "power on". Both units are equipped with both a line power and a battery power indicating red LEDs, with a slide power switch to select the desired source. Supported video formats include both SMPTE 292 and 372M. Link latency is specified at less than two microseconds. The transmitter and receiver accommodate dual-link (3 Gbps or 3DTV) via two BNC connectors. Modulation is accomplished via direct detection using NRZ (non-return zero) and the BER is less than 1 x 10-12. The units' built-in antennas have a gain of +35 dBi and a beamwidth of five degrees.
Output power is rated at +10 dBm (10 mW), with a service range stated as up to 500 meters. The units operate in the unlicensed 59-64 GHz frequency range (FCC part 15.255). Operating temperature range is from -22 F to +140 F. Both units measure about 10 x 10 x 5-inches and are equipped with a standard mounting plate with a one-quarter-20 thread. Both are powered by 12 VDC sources (10.5-17 VDC at 15 Watts), via either via XLR-4 or V-Mount battery connections. The receive unit weighs in at 23 pounds, and the transmit unit checks in at 22 pounds. The system (as tested) consists of a transmitter, TX6292T, and a receiver, 6292R. The GigaLink HD is a portable, 2.970 Gigabit HD-SDI wireless link. Although the link distance is somewhat limited, for certain tasks the GigaLink may be just the tool you've been looking for. has developed a very robust, dual HD-SDI link that operates in the unlicensed 60 GHz band. HXI, a microwave equipment manufacturer in Haverhill, Mass. For 3 Gbps applications, however, the list gets really short. With the nationwide BAS relocation, most broadcasters have upgraded versions of the old reliable (mostly) 2 GHz microwave systems.
If you're in a hostile military/combat environment, someone's life could actually depend on a microwave radio link. Now as overly-dramatic as I made that sound, "bouncing" video around for news can be very stressful. I had done it-the four-hop microwave shot had worked. Would the range be too great? Had I selected the right equipment?Īs I sat perched in the deserted alumni suite overlooking the Murray State Racer football stadium, the motorcade slowly and uneventfully passed by and the broadcast video was as clear as a bell. Years of training would finally be put to the test.
From the seventh-floor window, I could see the presidential candidate motorcade approaching.
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