Zaxcom QRX235 4-Channel ENG Receiver with QIFB
- 4-channel ENG receiver for camera
- Built-in QIFB for IFB, timecode, and remote control
- AES or analog outputs on two TA5 connectors
From $3,150.00 USD
Zaxcom QRX235 4-Channel ENG Receiver with QIFB
The Zaxcom QRX235 is a block-specific 4-channel ENG receiver for camera, with a built-in QIFB transmitter that sends IFB audio, timecode, and remote control commands over ZaxNet.
It receives up to four channels from two transmitters, in any mix of Zaxcom mono and stereo UHF transmitters. Zaxcom designed it as the successor to the QRX100, with new digital modulation and a receiver design that raises sensitivity and lowers the noise floor for longer range.
Confidence Loop
Paired with a Zaxcom camera link, the QRX235 closes a confidence loop. It receives two channels of digital audio with embedded SMPTE timecode at the camera and sends the camera’s return back to the sound bag.
Outputs and Connections
Two TA5 connectors carry AES digital audio or analog audio at mic (-35 dB), consumer (-10 dB), or line (0 dB) level. IFB audio comes in on a 3.5 mm stereo jack, and timecode in and out share another.
Two serial loop USB connectors link a ZaxMote or other QRX receivers. Change the frequency on any linked receiver, and the QRX235’s QIFB changes the matching transmitter.
RF Performance
Because each QRX235 is block specific, its filtering passes only its own frequency window and blocks strong signals outside it, such as walkie-talkies and wireless follow focus. Twelve bright multicolored LEDs, recessed into the side, show that RF and audio are reaching the camera, even in bright sunlight.
Blocks and Power
Each QRX235 covers one block from 20 to 26; blocks 24 to 26 are no longer sold or used in the US. It runs on 9 to 18 V DC through a Switchcraft 760K connector.
Features
- 4-channel ENG receiver, two transmitters
- Built-in QIFB ZaxNet transmitter for IFB, timecode, and remote control
- AES or analog output at mic, consumer, or line level
- Block-specific filtering
- Side LEDs show RF and audio reaching the camera
- Serial loop links other QRX receivers and ZaxMote
- 9 to 18 V DC external power
Available Options
| Block | Frequency Range |
|---|---|
| Block 20 | 518 – 542 MHz |
| Block 21 | 536 – 572 MHz |
| Block 22 | 560 – 590 MHz |
| Block 23 | 590 – 614 MHz |
| Block 24 | 614 – 644 MHz |
| Block 25 | 638 – 668 MHz |
| Block 26 | 662 – 692 MHz |
Specifications
| Receiver | |
|---|---|
| Single Mode | True diversity, single conversion digital demodulator |
| Dual Mode | Antenna diversity, single conversion digital demodulator |
| RF Modulation | Proprietary digital |
| RF Frequency Range | 512.0 – 692 MHz |
| RF Frequency Step | 100 kHz |
| RF Bandwidth | 100 kHz in ZHD96; 200 kHz in XR, mono, and stereo |
| Channel Separation | 500 kHz |
| Sensitivity | −110 dBm |
| Antenna Connector | SMA female, 50 Ω |
| Audio Outputs | |
| Analog Outputs | 4, line level, TA5M |
| Dynamic Range | 114 dB |
| Distortion | 0.001% |
| D/A Conversion | 24-bit |
| Digital Outputs | 4, AES balanced, TA5M |
| QIFB 2.4 GHz Transmitter | |
| RF Power Output | 50 mW |
| RF Modulation | Digital spread spectrum |
| RF Frequency Range | 2.403 – 2.475 GHz |
| RF Frequency Step | 1 MHz |
| RF Bandwidth | 1 MHz |
| Channel Separation | 2 MHz |
| Antenna Connector | SMA female, 50 Ω |
| Audio Dynamic Range | 103 dB |
| Audio Distortion | 0.01% |
| Audio Frequency Response | 20 Hz – 12 kHz |
| System Group Delay | 10 ms |
| QIFB Inputs and Timecode | |
| IFB Audio Input | 3.5 mm stereo, balanced or unbalanced, −10 dBu, 10 kΩ |
| A/D Conversion | 24-bit, 48 kHz |
| Timecode Input | 3.5 mm stereo, 1 – 5 V p-p, 10 kΩ |
| Timecode Output | 3.5 mm stereo, 0.2 – 5 V p-p, 8 Ω |
| Clock Accuracy | 1.54 PPM (1 frame in 6 hours) |
| Timecode Type | SMPTE |
| Frame Rates | 23.98, 24, 25, 29.97 NDF, 29.97 DF, 30 NDF, 30 DF |
| Physical and Power | |
| Dimensions | 1.25 × 3.25 × 5.25 in (32 × 83 × 133 mm) |
| Weight | 6.0 oz (170 g) |
| External Power | 9 – 18 V DC (300 mA at 12 V DC) |
| Display | Graphic LCD |
| Latest Specifications | Specifications are subject to change without prior notice. For current information, visit zaxcom.com. |
