Lectrosonics Venue Receiver User Manual

Venue Receiver
Six Channel Modular Receiver
Featuring Digital Hybrid Wireless® Technology
TECHNICAL DATA
• Ratio, Antenna Phase or Frequency diversity reception
• 256 synthesized UHF frequencies per receiver module
• DSP-based pilot tone squelch control
• DSP emulation modes for compatibility with analog wireless systems in addition to the Digital Hybrid mode
• SmartNR™ noise reduction modes
• LecNet2 software interface included
• LCD interface for setup and monitoring
• USB and RS-232 computer interface
Digital Hybrid Wireless
that combines digital audio with an analog FM radio
link to provide both outstanding audio quality and exemplary, noise-free RF performance.
Using a patented algorithm to encode 24-bit digital
audio information in the transmitter into an analog format, the encoded signal is then transmitted over an
analog FM wireless link.
®
is a revolutionary design
The Venue Receiver is a modular solution that effectively deals with a congested RF spectrum with a variety of options that allows a system configuration to be idealized for a particular installation or application.
The receiver is comprised of several components:
• The master rack mount host assembly
• Up to six receiver modules
• Built-in antenna multicoupler with loop-thru output
• LecNet2 software for setup and control
Flexibility is the core concept of the design. The receiver
modules can be operated separately, each with switched
diversity reception for a total of six audio channels, or
operated in pairs for more robust diversity reception with one audio channel per module pair. Combinations can also be used for special applications where some mod­ules operate independently and others are paired.
The receiver modules are easy to change with no tools required. The wideband multicoupler allows the use
of any frequency module in any position, except when
modules are paired, they must be in adjacent positions
as marked on the panel.
A major benefit of the design is the inclusion of a high quality antenna multicoupler. The multicoupler is actually
a 1 in, 7 out splitter with six outputs for the receiver mod-
ules and an additional output as a “loop thru” for another Venue receiver. This allows multiple Venue receivers to operate from a single pair of antennas. Phantom power for remote antenna amplifiers is available from the multi­coupler antenna inputs using internal jumpers.
At the receiver, the signal is then decoded to restore the original digital audio. This process eliminates compandor artifacts and produces an audio
frequency response at to 20 kHz.
(US Patent 7,225,135)
Rio Rancho, NM, USA www.lectrosonics.com
Front Panel
The front panel provides an easy-to-use LCD interface for setup, and provisions for quick monitoring to assist in troubleshooting. In normal operation, the LCD shows
RF and audio levels, diversity status, pilot tone status (where applicable) and transmitter battery status for all
six receivers at the same time.
Rear Panel
The rear panel provides six balanced audio outputs on standard XLR connectors, 50 ohm BNC antenna inputs, 50 ohm BNC antenna outputs from the built in zero-gain multicoupler, power jack with a locking connector, USB port and RS-232 serial port for the computer interface.
Individual screens for each receiver are also available at the touch of a button to provide additional information and setup adjustments.
A headphone jack and level control is provided for indi-
vidual channel monitoring.
The receiver assembly is powered from an external source at 10 to 18 volts DC through a locking connec-
tor, allowing the unit to operate from a wide variety of sources in stage, studio and mobile applications.
Receiver Modules
Two modules are available to further customize the configuration for specific applications. The VRS standard
module has xed front-end lters that cover its 25.5 MHz
tuning range. The higher selectivity VRT module has
tracking front-end lters that retune as the frequency is
changed to stay centered over the selected frequency.
The modules are a triple conversion, frequency synthe­sized design, controlled by the microprocessor in the
host assembly. A common DSP in the host assembly is used for all six receiver modules to decode the received signals and restore the digital audio. Using a single DSP
results in a significant reduction in cost per channel.
The host assembly will handle up to six receiver modules via multi-pin connectors on the side of the main hous­ing. The modules are held in place with snap-in retaining
clips. The clips hold the modules firmly but are easy to
remove without tools to make needed changes.
Built-in Antenna Multicoupler
An tenn a An tenn a
Every Venue receiver has a built-in multicoupler that utilizes high current RF ampliers and a Wilkinson type
splitter for even signal distribution and high isolation be­tween receiver modules. Optimally matched levels allow
multiple receivers to be stacked and share a single pair of antennas - a signicant savings in space and cost in multi-channel systems.
Phantom Power Jumpers
A remote amplifier can be powered directly from the
Venue receiver through the coaxial cable. The ALP650 combines a broadband LPDA antenna with an ampli-
fier, which is especially useful with the broad bandwidth of the Venue multicoupler. Jumpers are provided on the circuit board to enable and disable the phantom power.
The top cover is removed with six screws and the jump­ers are set as shown to enable the DC power.
10.5-18VDC
2
2
2
1
1
1
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LINK 3
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LINK 3
RS-232
10.5-18VDC
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RS-232
LINK 3
10.5-18VDC
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1
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RS-232
ANTENNA A
ANTENNA A
ANTENNA A
ANTENNA B
IN USBIN
OUT
OUT
LINK 2
ANTENNA B
IN USBIN
OUT
OUT
LINK 2
ANTENNA B
IN USBIN
OUT
OUT
LINK 2
2 1
1
3
321
2 1
1
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2 1
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LINK 1
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LINK 1
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LINK 1
The built-in multi-coupler includes “loop through” outputs for stacking multiple Venue receivers.
Four versions are available for different applications:
• Wideband High (665 - 862 MHz)
(used outside the USA)
• Wideband Mid (537 - 768 MHz)
• Wideband Low (470 - 691 MHz)
• Special Block 944 (944 - 952 MHz
(for licensed broadcasting use)
UFM230 UFM230
Long coax cabl e Long coax cabl e
DC Power to UFM230 DC Power to UFM230
VRM
Jumpers set
towards the center
Computer Connections
The Venue receiver is typically connected to a computer
via the USB port. Multiple receivers can be connected to a single computer using a USB hub. The receiver also provides an RS-232 port.
USB Hub
10.5-18VDC
2
2
2
1
1
1
3
3
3
5
6
4
RS-232
LINK 3
ANTENNA A
ANTENNA B
IN USBIN
OUT
OUT
LINK 2
2 1
1
3
321
2
2
1
3
3
LINK 1
10.5-18VDC
2
2
2
1
1
1
3
3
3
5
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RS-232
LINK 3
10.5-18VDC
2
2
2
1
1
1
3
3
3
5
6
4
RS-232
LINK 3
ANTENNA A
ANTENNA A
ANTENNA B
IN USBIN
OUT
OUT
LINK 2
ANTENNA B
IN USBIN
OUT
OUT
LINK 2
2 1
1
3
321
2 1
1
3
321
2
2
1
3
3
LINK 1
2
2
1
3
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LINK 1
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