Zaxcom TRX745 Wideband Plug-on Wireless Transmitter

The Zaxcom TRX745 is a wide-band plug-on style digital wireless transmitter with interchangeable cones, it’s the only plug-on transmitter that supports all professional microphone varieties – mono analog, stereo analog, AES and AES42 – making it an ideal choice for wireless transmission directly from boom poles or handheld microphones.
Its body is constructed from a combination of high strength nylon polymer and aluminum. It features Zaxcom High Density (ZHD) Modulation.

Encrypted Audio

The TRX745 transmits using 100% digital modulation allowing audio to be fully encrypted. Digital encryption is the only way to keep all audio transmission private. A digital transmission also provides audio quality superior to analog systems.

QC Audio Transmission

The TRX745 also sends a Quality Control audio signal over ZaxNet™, so when micing someone you don’t have to go all the way to the cart to hear how it sounds, you can use an ERX to listen to the mic right on the spot.

Zaxnet™

TRX745 is equipped with ZaxNet™, a long-range remote-control system allowing the user to change the frequency, pre-amp gain, sleep mode, and place the internal recorder in record, playback, and stop modes – all without ever needing to disturb talent. The units can also replay audio via a timecode reference, giving production sound mixers the ability to replay and remix audio, creating a virtual multi-track playback and re-record system.

Specifications

Transmitter

RF Modulation	Proprietary Digital Method
Frequency Range	512 – 614 MHz / 596 – 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 100 KHz (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	74.861

 

Transmitter Audio

Dynamic Range	126 dB (Stereo model 106 dB)
Distortion	0.002%
Frequency Response	Mode 0
High Pass Filter	Off or 30 to 220 Hz, Steps
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
Audio Interfaces	Balanced analog mono, balanced stereo, AES42, AES

 

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

 

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
Sensitivity	-96 dBm

 

Power

Power Output	25, 50 or 100 mW – Software Selectable
Battery Type	3 AA cells
Battery Life	Battery Type / Mic power requirement dependent