QRX100 4 Channel Camera RF Audio System (Preliminary Product Info)

QRX100 Features:
- Four channel UHF diversity audio receiver
- Built-in IFB return channel transmitter
- SMPTE timecode reader/generator
- Multi-camera serial remote control
- Video sync and timecode output
- Four channel side mounted LED meters (Pat. Pend.)
Overview
| Options
| Specifications
| Photos
The QRX100 RF, audio and timecode receiver is a quantum leap in wireless transmission both to and from the video camera. It can receive up to four channels of 100% digital audio from up to two Zaxcom stereo transmitters to take full advantage of the four discreet audio channels available in most of today’s video cameras. With add-on features to suit your needs and budget, QRX100 provides unprecedented flexibility in a broadcast ENG receiver.
The QRX100 outputs audio in both analog and AES digital formats. Digital modulation keeps the signal interference-free from noise that could add distortion to an analog ENG system. It is housed in a lightweight industry standard package providing optimum compatibility and functionality for broadcasters and freelancers alike.
Any combination of Zaxcom TRX series mono or stereo transmitters can be used with the QRX100. The TRX9xx features include no inter-modulation, built-in backup recording on Flash memory (Pat. Pend) and an internal IFB audio receiver. Zaxcom’s true digital stereo transmission uses half the bandwidth of traditional analog solutions.
A single QRX100 mounted on the side of the camera is a complete solution for audio transmission to/from the camera, TRX900 bodypack remote control and timecode synchronization. Significant size, weight and power consumption reductions are to the camera operator’s benefit. To replicate the capability of one QRX100, up to 4 receivers, a sync generator and an IFB transmitter would need to be mounted on the camera.
The QRX100 offers performance superior to one and two-channel slot-in type receivers that are only available for a limited number of broadcast cameras. The QRX100’s connection to external camera power allows for better interference rejection than that of slot-in type receivers that have a limited source of power.
The QRX100 quickly attaches to any broadcast camera with an industry standard mounting kit. Limited camera slot compatibility makes it impossible to quickly convert a slot-in receiver for use from one camera model to another.
A group of 12 multi-colored LEDs are recessed into the side of the QRX100 (Pat. Pend). They are visible with the QRX100 mounted in its Zaxcom camera mount and provide the sound mixer with visual confirmation of audio reception at the camera. The LEDs are very bright and can be seen from a distance of up to 20 feet away in bright sunlight. This unique feature will be very beneficial as it is currently typical for there to be no visible confirmation of audio transmission.
QRX100 Options:
QTX50: Internal 2.4 GHz IFB Audio, Timecode and Remote Control Transmitter
This option allows the QRX100 to return a mono confidence monitor to the transmitter(s), broadcast timecode for synchronization and/or remote roll, and sends transmitter remote control commands (RF frequency, audio level, etc.).
QSYNC50: Internal Video and Timecode Sync Generator
This option allows the QRX100 to read and generate SMPTE timecode. It can be used in conjunction with other QRX100’s or with Zaxcom’s TRX series bodypack transceivers.
This gives the ability to designate one QRX100 as a Master and any number of other QRX100 units as Slaves. The “Master” will synchronize a group of TRX900s and “Slave” cameras, controlling the Record/Stop functions of the slave cameras remotely*. This keeps the timecode recorded with the audio in each transmitter and the video in each camera identical, even in Record-Run.
Video reference output is included to provide sub-frame lock of video cameras used in a multi-camera production. All standard and high definition video formats are supported. This function eliminates the need for separate sync boxes on each camera in a multi camera shoot. It has the advantage of never drifting and never needing a physical timecode jam.
*On cameras that support RS422 or RS485 interface with necessary protocols
QRX100 Preliminary Specifications:
| Receiver |
| Receiver Type |
True / antenna diversity single conversion digital demodulator (mono or stereo) |
| RF Modulation |
proprietary digital method |
| RF Frequency Range |
518.0 to 872.0 MHz (blocks are 20 to 36 MHz wide) |
| RF Frequency Step |
100 KHz |
| RF Bandwidth |
US Mode: 200 KHz |
| |
Euro Mode: 125 KHz |
| Channel Separation |
500 KHz (700 KHz recommended) |
| Sensitivity |
-110 dBm |
| Antenna Connector |
50-ohm SMA female |
| Receiver Audio - Analog Output (x 4) |
| Dynamic Range |
114 dB |
| Distortion |
0.001% |
| DAC Bit-depth |
24 bits |
| DAC Rate |
48 kHz |
| Connector |
TA-5M |
| Audio Output Level |
Line: -10 to 0 dBm active balanced |
| Receiver Audio - Digital Output (x 4) |
| Signal Format |
AES balanced |
| Sample-rate |
32 to 196 kHz |
| AES Reference |
Word clock and AES reference |
| Connector |
TA-5M |
| IFB Transmitter |
| RF Power Output |
50 mW |
| RF Modulation |
Digital Spread Spectrum |
| RF Frequency Range |
2.403 to 2.475 GHz |
| RF Frequency Step |
0.001 GHz (1 MHz) |
| RF Bandwidth |
1 MHz |
| Channel Separation |
2 MHz |
| Antenna Connector |
50-ohm SMA female |
| Emission Designator |
180 KV2E |
| FCC Part |
CFR Title 47, Part 18 |
| IFB Transmitter Audio |
| Dynamic Range |
103 dB |
| Distortion |
0.01% |
| Frequency Response |
20 Hz to 12 kHz |
| Highpass Filter |
Off or 30 to 220 Hz, step: 10 (6 dB per octave) |
| System Group Delay |
10 ms |
| IFB Audio Input |
| Connector |
Stereo 1/8" (3.5 mm) |
| Type |
Balanced |
| Level |
-10 to +8 dBu |
| Impedance |
10 k ohms |
| ADC Bit-depth |
24 bits |
| ADC Sampling-rate |
48 kHz |
| Timecode Input |
| Connector |
Stereo 1/8" (3.5 mm) |
| Level Range |
1 to 5V, P-P |
| Impedance |
10 k ohms |
| Timecode Output |
| Connector |
Stereo 1/8" (3.5 mm) |
| Level Range |
.2 to 5V, P-P |
| Impedance |
8 ohms |
| Timecode Reader / Generator |
| Clock Accuracy |
1.54 PPM (1 frame out in 6 hours) |
| Timecode Type |
SMPTE |
| Timecode Frame-rates |
23.98, 24, 25, 29.97NDF, 29.97DF, 30NDF, 30DF |
| Video Sync Output |
| Connector |
SMA female |
| Level Range |
1 V, P-P |
| Impedance |
75 ohms |
| Remote Control |
| Protocols |
RS-422, RS-485 |
| Connector (x 2) |
USB |
| Physical |
| Weight |
6.0 oz (170 grams) |
| Dimensions (H x W x D) |
1.25" x 3.25" x 5.25" (32mm x 83mm x 133mm) |
| External Power |
6 to 18 VDC (200mA @ 12VDC) |
| Internal Power |
N/A |
| Display |
Graphic LCD panel |
All Specifications subject to change without notice
QRX100 Photos:
QRX100 front panel

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QRX100 pictured in its camera mount clearly displaying the side mounted LED's (Pat. Pend)
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QRX100 rear panel
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