VR Field
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Portable Six Channel Modular Receiver
The wideband design provides the flexibility to deal with a congested RF spectrum in any field or studio environment
by changing receiver modules. No tools are required to remove and install the modules.
The receiver is comprised of these components:
- The master 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 frequency or ratio diversity
reception with a total of 3 audio channels. Various
combinations can also be used for particular applications,
such as a pair with ratio diversity reception and the
other four with switched diversity reception for a total of
five audio channels. The receiver modules are easy to
change with no tools required.
A high quality antenna multicoupler is included in the
receiver to ensure ideal signal distribution and isolation
between modules and to reduce overall size and complexity.
The multicoupler is actually a 1-in/7-out splitter
which provides six outputs for the receiver modules and
an additional output as a "loop thru" for another Venue
receiver. A single pair of broadband antennas can feed
several receivers connected with coaxial cable over a
wide range of frequencies. Phantom power for remote
antenna amplifiers can be turned on and off with 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 (when available)
for all six receivers at the same time.
Individual screens for each receiver are also available to
provide additional information and setup adjustments.
A headphone jack and level control is provided for
individual channel monitoring. The NP1-type battery compartment
is just below the LCD.
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 multi-coupler, power
jack with a locking connector, USB
port and RS-232 serial port for the
computer interface.
The assembly is powered from an
external source of 10 to 18 VDC for a wide
variety of applications in stage, studio and
mobile applications. The power cable can also be used
with an external distribution module to power the receiver
and other devices simultaneously.
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
Passband for VR Field host asssembly: Wideband Low (470 - 691 MHz passband)
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 compatibility 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 %
Front End Bandwidth: VR Master: 50 MHz @ -3 dB, VRS Module: 30 MHz @ -3 dB, VRT Module: 11 MHz @ -3 dB
Sensitivity (20 dB Sinad): 0.9 µV
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) via external power supply or
NP1-type 12V battery
Weight: 5.77 lbs. (2619 g) with 6 VRS receivers & clips
Dimensions: Height: 3.5" (8.89 cm), Width: 11.88" (30.18 cm), Depth: 8.25" (20.95 cm) (cover to end of BNC jacks, +1.5" for rear handle)
Specifications subject to change without notice.
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