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Zaxcom - TRX743 ZHD

Zaxcom - TRX743 ZHD
Zaxcom - TRX743 ZHD Zaxcom - TRX743 ZHD Zaxcom - TRX743 ZHD Zaxcom - TRX743 ZHD
Product Code: TRX7423
Sales SKU: ZAX TRX743

Available Options

* Zaxcom TRX743 Additional Cone:

* Zaxcom TRX743 Cone:

* Zaxcom Blocks .5 or .6:

Qty:   - OR - Add to Wish List

The TRX743 with ZHD technology is a plug-on style digital wireless transmitter for all professional microphone varieties - mono analog, stereo analog, AES, and AES42 (various cone choices available).  This product is ideal for wireless transmission of microphones on boompoles, handheld, or plant-mic scenarios.  The TRX743 comes standard with a built-in recorder, timecode reader/generator, and the ability to receive timecode and remote control commands via ZaxNet 2.4GHZ RF. Zaxcom's ZHD high density modulation technology will allow more frequencies to fit within a smaller bandwidth space without creating RF intermodulation. This not only allows the availability of more usable frequencies, but also greatly increases the range of the transmitter.


Also comes in TRX743.5 which covers blocks 20 through 23 (512 - 614 MHz) or TRX743.6 (blocks 23 - 26; 596 - 698 MHz).


*ZHD mode spacing varies based on receivers used.



Power output

25 / 50 / 100 mW Software Selectable (10 mW special order)

RF Modulation

Proprietary Digital Method

TRX743.5 RF Frequency Range

512 to 614 MHz


TRX743.6 RF Frequency Range

596 to 698 MHz

RF Frequency Step

100 KHz

RF Bandwidth in ZHD Mode

50 KHz

RF Bandwidth in XR Mode

200 KHz

Channel Separation in ZHD Mode

as close as 100KHz (receiver dependent)

Channel Separation in XR Mode

400 KHz

Antenna Connector

50 Ω SMA Female

Emission Designator

180 KV2E, 100 KV2E, 50 KV2E

FCC Part



Transmitter Audio

A-D Dynamic Range

126 dB (Stereo model 106 dB)



Frequency Response

Mode 0: 20 Hz to 16 kHz / T & M Mode 0.2 Hz to 16 kHz

High Pass Filter

Off or 30 to 220Hz, Steps: 10Hz (6 dB per octave)

Mic Connector

3-Pin or 5-Pin XLR

Analog Mic Power

48 V Phantom (10 mA max)

Digital Mic Power

10 V AES42 compatible (200 mA max)

Input Range

-60 to -30 dBu

Mic impedance

4.7 k Ω

ADC Bit-Depth

24 Bits

ADC Sampling-Rate

48 KHz

Audio Interfaces

Balanced analog mono, balanced stereo, AES42, AES


Timecode Reader / Generator

Clock Accuracy

1.54PPM (1 Frame Out in 6 Hours)

Timecode Type


Timecode Frame Rates

23.98, 24, 25, 29.97NDF, 29.97DF, 30NDF, 30DF



Internal Recording


MicroSD Card (Flash Memory)

File Format


Recording Time

96 Hours (16 GB card)


2.4 GHz ZaxNet Receiver

RF Frequency Range

2.403 to 2.475 GHz


RF Modulation

Digital Spread Spectrum

RF Frequency Step

0.001 GHz (1 MHz)

RF Bandwidth

1 MHz

Channel Separation

2 MHz


-96 dBm




7.5 oz without batteries

Dimensions (H x W x D)

5 cm x 11.5 cm x 4 cm



Graphic OLED




3 AA cells

Battery Life

Battery Life is dependent on Battery type and microphone power requirements

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