Line 6 XD-V75 manual Minimizing Near / Far Transmitter Effects, Antenna Mounting and Placement

at least a few feet away from the receivers when you are operating the wireless system.

Minimizing Near / Far Transmitter Effects

Line 6 digital wireless systems are designed so that a receiver only passes audio from a transmitter that is set to the same channel. While other nearby transmitters and RF sources will not create audio in a receiver not on their channel, under certain conditions they can have an effect on range. When you are using several channels of wireless, following some simple procedures will minimize any near / far effects.

The XD-V75 receiver constantly monitors the signal from its transmitter, and increases gain (sensitivity) as the transmitter moves farther away to maintain a good RF signal level. The near / far effect can happen when the transmitter is at a distance from the receiver’s antennas, and transmitters on different channels are being used near the antennas. The strong signal from the nearby transmitters, especially if they are close in frequency to the channel the receiver is set on, can mask the signal from the distant transmitter – and sometimes cause the audio from that transmitter to drop out.

For example, if the transmitter on the same channel as the receiver is 50 feet away, and another transmitter is 3 feet from the receiver’s antenna, the range of that distant transmitter might be affected. Avoid this potential problem by positioning the receivers and their antennas at a more equal distance from the transmitters that are in use.

Solutions include:

•Making sure that any transmitter is at least 6 feet away from the receivers, and that other RF sources (such as WiFi routers) are also at a distance from them.

•Placing the antennas higher, which can lessen the difference in distance as well as increase line-of-sight with the distant transmitter.

•Using remote antennas and placing them approximately equidistant from each group of transmitters (for example, positioning a remote antenna connected to ANTENNA A nearer to the closer transmitters, and one connected to ANTENNA B nearer to the distant transmitters).

•Moving the receiver associated with the distant transmitter closer to it, or using remote antennas attached to that particular receiver to get closer.

•Using the LO transmitter power setting for the nearby transmitters, and the HI power setting for the distant transmitter.

Antenna Mounting and Placement

The XD-V75 receiver may be used stand-alone, or may be rack-mounted. When used by itself and placed on a surface, the antennas are typically mounted on the rear and connected to the BNC connectors labeled ANTENNA A and ANTENNA B. For rack-mounting, Line 6 has provided a variety of options, including a long rack ear with cutouts for mounting the supplied BNC connectors to front-mount antennas, a pair of BNC cables to connect the receiver to those antennas, and hardware to connect two of the half-rack receivers side-by-side in one rack space. Multiple receivers can share one pair of antennas via looping connectors on the back of the receiver. And optional remote antennas are available.

Note, When rack-mounting receivers, it is preferable to keep them – and their associated antennas – toward the top of the rack so that line-of-sight to the transmitters is unobstructed for the best range and performance. Also, keep receivers and equipment such as digital signal processors, computers, WiFi wireless routers, and other devices that emit RF energy as separated from each other as possible.

Rack Mounting One Receiver with Front-Mounted Antennas

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