Zaxcom QRX235


The QRX235 is a Block specific ENG style receiver with QIFB, a built-in 2.4GHz ZaxNet IFB transmitter. The built-in filtering and enhanced receiver design give it maximum sensitivity and a low noise floor.

SKU: zc008 Category:


QRX235 can output AES digital audio or analog audio at -35dB mic level, -10dB consumer level, or 0dB line level on 2 x TA5 connectors. IFB audio is input via an 1/8″ (3.5mm) stereo mini jack. Timecode I/O is also on an 1/8″ (3.5mm) stereo mini jack. The two serial loop USB connectors are for connecting to ZaxMote or other QRX200’s to share the QIFB remote control feature.


The QRX235 receives up to four channels of audio from two separate transmitters. You can use it with any combination of mono and stereo UHF transmitters we make, but it’s most often paired with our TRXCL3 for a full confidence monitor return with or without timecode.


The QRX235 with QIFB is block specific, this means it receives on its designated frequency window and all other interfering high-level signals outside this frequency space will be blocked out. The nerds call this desensing. We let the good stuff in (your radio mic transmitters) and we keep the bad stuff out (walkie talkies, the follow focus, etc.). Think of it like the bouncer outside a nightclub.


  • Receiver
    • Single Mode Receiver TypeTrue diversity single conversion digital demodulator
    • Dual Mode Receiver TypeAntenna diversity single conversion digital demodulator
    • RF Modulationproprietary digital method
    • RF Frequency Range512.0 to 692 MHz
    • RF Frequency Step100 KHz
    • RF Bandwidth100 KHz in ZHD 96, 200 KHz in XR, mono, and stereo modes
    • Channel Separation500 KHz
    • Sensitivity-110 dBm
    • Antenna Connector50-ohm SMA female
  • Receiver Audio – Analog Output (x 4)
    • Dynamic Range114 dB
    • Distortion0.001%
    • DAC Bit-depth24 bits
    • ConnectorTA-5M
    • Audio Output LevelLine
  • Receiver Audio – Digital Output (x4)
    • Signal FormatAES Balanced
    • Audio Output ConnectorTA-5M
  • 2.4 GHz RF Transmitter (QIFB)
    • RF Power Output50 mW
    • RF ModulationDigital Spread Spectrum
    • RF Frequency Range2.403 to 2.475 GHz
    • RF Frequency Step0.001 GHz (1 MHz)
    • RF Bandwidth1 MHz
    • Channel Separation2 MHz
    • Antenna Connector50-ohm SMA Female
    • Emission Designator180 KV2E
    • FCC PartCFR Title 47, Part 18IFB
  • 2.4 GHz Audio Transmitter (QIFB)
    • Dynamic Range103 dB
    • Distortion0.01%
    • Frequency Response20 Hz to 12 kHz
    • System Group Delay10 ms
  • 2.4 GHz IFB Audio Input (QIFB)
    • ConnectorStereo 1/8″ (3.5 mm)
    • TypeBalanced / Unbalanced
    • Level-10 dBu
    • Impedance10 k Ω
    • ADC Bit-depth24 bits
    • ADC Sampling Rate48 kHz
  • Timecode Input (QIFB)
    • ConnectorStereo 1/8″ (3.5 mm)
    • Level Range1 to 5V, P-P
    • Impedance10 k Ω
  • Timecode Output (QIFB)
    • ConnectorStereo 1/8″ (3.5 mm)
    • Level Range.2 to 5V, P-P
    • Impedance8 Ω
  • Timecode Reader / Generator (QIFB)
    • Clock Accuracy1.54 PPM (1 frame out in 6 hours)
    • Timecode TypeSMPTE
    • Timecode Frame Rates23.98, 24, 25, 29.97NDF, 29.97DF, 30NDF, 30DF
  • Misc.
    • Weight6.0 oz (170 grams)
    • Dimensions1.25″ x 3.25″ x 5.25″ (32mm x 83mm x 133mm)
    • External Power9 to 18 VDC (300mA @ 12VDC)
    • Internal PowerN/A
    • DisplayGraphic LCD Panel