Zaxcom DCiRX Digital UHF Receiver

Zaxcom DCiRX — Single-channel digital UHF wireless receiver with integrated 4-track recorder, microphone preamp, and USB-C audio interface, powered by AA batteries. The DCiRX uses a narrow-band direct conversion architecture. A hardware filter is applied per channel before the A-to-D converter, so only the intended receive frequency reaches the converter. This eliminates the vulnerability to off-channel interference present in wideband IF-sampling designs, where a single strong signal can degrade an entire block of frequencies simultaneously. A tunable tracking front-end filter, adjustable in 1 MHz steps, provides additional selectivity in congested RF environments.

The DCiRX receives from any current Zaxcom transmitter in mono, stereo, XR, or ZHD96 modes, while simultaneously accepting a direct microphone input via 3-pin LEMO (5V unbalanced or 48V balanced phantom/dynamic). Both sources record simultaneously to microSD as a 4-track session — two receive ISOs, a mic input track, and a mix track — in 32-bit float or 24-bit fixed broadcast WAV with embedded SMPTE timecode.

The USB-C port on the DCiRX functions as a 4-channel audio interface (144 dB dynamic range) compatible with laptops, mobile devices, and USB cameras including Blackmagic ProDock. Balanced analog output via TA-5 is adjustable from mic level to +12 dBu line level. The unit additionally operates as a UHF IFB receiver and supports encrypted audio transmission.

Power is supplied by three AA batteries (up to 7 hours on Li-Ion) or via USB-C. Weight is 0.3 lbs (0.14 kg) without batteries. I/O includes a graphic OLED display, locking 3.5mm headphone output, and locking 3.5mm SMPTE timecode output.

Features

• Narrow-band direct conversion receiver architecture (new to Zaxcom standalone receivers)
• Tunable tracking front-end filter, adjustable in 1 MHz steps
• Receives mono, stereo, XR, and ZHD96 modulation from all current Zaxcom transmitters
• Direct microphone input via 3-pin LEMO (5V unbalanced or 48V balanced/dynamic phantom)
• 4-track internal recording to microSD: 2 RX ISOs + mic input + mix track
• 32-bit float or 24-bit fixed broadcast WAV recording with embedded SMPTE timecode
• USB-C 4-channel audio interface (144 dB dynamic range); compatible with Blackmagic ProDock
• Balanced dual-channel analog output via TA-5, adjustable from mic to +12 dBu line level
• Internal SMPTE timecode generator and output (23.98, 24, 25, 29.97, 30 DF/NDF)
• UHF IFB receiver mode
• Encrypted audio support
• Antenna diversity switching, dual SMA connectors
• Sensitivity: -100 dBm / Analog dynamic range: 116 dB