TRX900 Digital Wireless Transceiver

The TRX900 is an encrypted digital wireless transmitter with optional internal backup recording and IFB.  By incorporating an IFB receiver into the body of a traditional wireless transmitter, both functions are now combined in a package smaller than most transmitters on the market today.


TRX900 Standard Features:

  • Fully encrypted audio transmission
  • Built-in 2.4 GHz receiver to receive timecode and remote control signals from ZaxNet and/or IFB100
  • Digital modulation wireless transmitter
  • Superb audio quality that rivals a mic cable
  • Digital drop-out protection
  • 5 hour run time on single CR123 battery
  • Graphic LCD display
  • Integrated timecode reception
  • Small and lightweight
  • No inter-modulation – up to 50 transmitters, in the same frequency block, can be used together.

TRX900 Optional Features:

  • Built-in IFB audio receiver
  • 96 hour internal backup recording with timecode stamp

TRX900 Options:

TRX900 Top
The MicroSD card slot on the TRX900

Internal Recording - Ordered as TRX901
The TRX900AA’s 96 hour, 24 bit internal loop-recording option is perfect for those times when there’s a lack of available frequencies or when drop-outs cannot be tolerated.  The audio is timecode referenced, recorded on and played back from a removable MicroSD memory card that can be used in any standard SD card reader.

Audio can be recorded, played back and timecode referenced either manually or through remote control commands from the IFB100 transmitter.

The audio is automatically recorded full bandwidth as a .ZAX file. The included ZaxConvert file transfer software (available for both MAC and PC) utilizes sample rate conversion to obtain the sample rate and bit depth of choice when files are imported to your computer. There are two timecode stamped file types to choose from: BWF (Broadcast Wave Format) or MP3 (MPEG-1 Audio Layer 3). MP3 files are great for quickly transferring files over the internet to a transcription house.

Any number of versions of the same recording can be made from a single file.

IFB Audio Reception – Ordered as TRX10
The TRX900 internal IFB audio option adds the ability to receive IFB (confidence) audio directly on the bodypack via the built-in 2.4 GHz receiver. To monitor audio an EA100 or Stereo Adapter is required.

TRX900 Adapters & Accessories:

IFB Transmitter – IFB100
Stereo Adapters – STA100, STA150, STA042
Filter Antenna – FDP1 (Recommended for use with the TRX900AA & Stereo Adapter)
Earpiece Adapter – EA100
Timecode Adapter – TCA100
Mute Switch Adapter – MSA100

TRX900AA Adapters & Accessories offered by Areitec:
Pico482 – Stereo Phantom power adapter

The Pico482 is an integrated transmitter mounting system that delivers true 48V from a single 9V battery, transforming your TRX900AA into a stereo boom transmitter.
Please visit the news page on Areitec’s website for details and ordering information:

TRX900 Specifications:
RF Power output 10 / 25 / 50 mW – Software selectable
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)
Antenna Connector 50-ohm SSMA female
Emission Designator 180 KV2E
FCC Part 74.861
Transmitter Audio
Dynamic Range 106 dB
Distortion 0.001%
Frequency Response Mode 0:         20 Hz to 16 kHz
T&M Model:  0.2 Hz to 16 kHz
High pass Filter Off or 30 to 220 Hz, step: 10 (6 dB per octave)
System Group Delay US Mono mode:  3.6 ms
Euro mode:          6 ms
Stereo mode:      6 ms
Mic Power 3.3 VDC
Mic Connector 3-pin micro-LEMO
Input Range -60 to -30 dBu
Impedance 4.7 k ohms
ADC Bit-depth 24 bits
ADC Sampling-rate 48 kHz
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
Recording (optional)
Media MiniSD card (Flash memory)
File Format .ZAX
Recording Time 96 hours (16 GB card)
IFB Receiver (audio portion optional)
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
Sensitivity -96 dBm
DAC Bit-depth 24 bit
DAC Rate 48 kHz
Frequency Response 20 Hz to 12 kHz
Output Impedance 8-ohm minimum
Weight 4.0 oz. (113 grams) with battery
Dimensions (H x W x D) 2.3″ x 2.3″ x .65″ (58 mm x 58 mm x 17 mm)
External Power (STA100/150) 9 to 18 VDC @ 125 mA
Internal Power (Battery) Up to 5 hours @ 50 mW (one CR123)
Display Graphic LCD panel
All specifications are subject to change without notice.
Zaxcom Digital Wireless is protected under patent #’s: 7,711,443 & 7,929,902