Venue Modular Receiver System
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Six Channel Modular Receiver
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
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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 modules
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.
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.
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 individual
channel monitoring.
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.
The receiver assembly is powered from an external source at 10 to 18 volts DC through a locking connector,
allowing the unit to operate from a wide variety of sources in stage, studio and mobile applications.
Two modules are available to further customize the configuration for specific applications. The VRS standard module has fixed front-end filters that cover its 25.5 MHz tuning range. The higher selectivity VRT module has tracking front-end filters 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.
Every Venue receiver has a built-in multicoupler that utilizes high current RF amplifiers 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 significant savings in space and cost in multi-channel systems.
An automated scanning process is also available that tunes a receiver module across its tuning range and selects a frequency with the least RF energy.
The process takes less than 30 seconds and the screen prompts the operator to turn on a transmitter for the last frequency selected before continuing. Once the transmitter
is turned on, the process continues, prompting the operator to continue and select the next receiver to tune.
As the receiver is tuned to each frequency, the analysis
evaluates RF energy within the channel as well as energy above and below the channel to avoid selecting a frequency adjacent to a high powered signal.
Digital Hybrid Wireless® is a revolutionary new design
that combines digital audio with an analog FM radio link to
provide outstanding audio quality and the exemplary RF
performance of the finest analog wireless systems.
This overcomes channel noise in a dramatically new way,
digitally encoding the audio in the transmitter and decoding
it in the receiver, yet still sending the encoded information
via an analog FM wireless link. This proprietary algorithm
is not a digital implementation of an analog compandor.
Instead, it is a technique which can be accomplished only
in the digital domain.
The process eliminates compandor artifacts, expanding the
applications to include test and measurement of acoustic
spaces and musical instruments.
Operating frequencies (MHz) for receiver modules:
Block 470 470.100 - 495.600
Block 19 486.400 - 511.900
Block 20 512.000 - 537.500
Block 21 537.600 - 563.100
Block 22 563.200 - 588.700
Block 23 588.800 - 607.900 and 614.100 - 614.300
Block 24 614.400 - 639.900
Block 25 640.000 - 665.500
Block 26 665.600 - 691.100
Block 944 (VRS only) 944.100 - 951.900
Digital latency: 1.5 mS (receiver only - hybrid mode), 3.0 mS (receiver and transmitter in hybrid mode), 3.0 mS (receiver only - analog compatibility mode). The 3.0 mS latency in analog compatiblity mode time aligns the audio from analog and hybrid transmitters when they are used together in a Venue system.
Frequency selection: 256 frequencies in 100 kHz steps per 25.5 MHz frequency block
Channel Spacing: 100 kHz
Dual Block Range: Built in antenna mulitcoupler covers a two block range.
Pilot tone: 25 to 32 kHz; 5kHz deviation; unique pilot tone frequency for each selected carrier frequency (Hybrid mode)
Deviation: ± 75 kHz (max) (Hybrid mode)
Receiver Type: Triple conversion superheterodyne
Frequency Stability: ±0.001 %
Multicoupler Bandwidth: Wideband High: 665 - 862 MHz, Wideband Mid: 537 - 768 MHz, Wideband Low: 470 - 691 MHz, Special Block 944: 8 MHz; 944 - 952 MHz
Front End Bandwidth: VRS Module: 30 MHz @ -3 dB, VRT Module: 11 MHz @ -3 dB
Sensitivity (20 dB Sinad): 0.9 uV
AM Rejection: >60 dB, 2 µV to 1 Volt
Image and Spurious Rejection: 85 dB
Third Order Intercept: VRS:+0 dBm, VRT: +6 dBm
Diversity Methods: Switched, ratio and frequency
FM Detector: Digital pulse counting detector @ 300 kHz
Frequency Response: 32 Hz to 20 kHz (±1dB), overall system (400 Series mode)
THD: 0.2% (typical) (400 Series mode)
Input Dynamic Range: 125 dB (with full transmitter limiting)
Audio Output Level: -15 dBu to +8 dBu, in 1 dB increments
LCD: 122x32 graphical display
Power Requirements: 10 to 18 VDC; 17.2 W max. (1.72 A @ 10 VDC to 1.05 A @ 18 VDC)
Weight: VRM with 6 VRS modules: 4.28 lbs. (1946 g) VRM with 6 VRT modules: 4.45 lbs. (2018 g)
Dimensions: 19"W x 1.75"H x 7.75"D (panel to rear jacks) (48.26 cm x 4.45 cm x 19.67 cm)
Specifications subject to change without notice.
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