Zaxcom TRX743 Plug-On Transmitter
- Plug-on transmitter with interchangeable cones
- Encrypted audio and internal microSD recording
- NeverClip, ZaxNet control, and PowerRoll
From $2,245.00 USD
Zaxcom TRX743 Plug-On Transmitter
The Zaxcom TRX743 is a wide-band digital plug-on transmitter with interchangeable cones, so one body works with mono analog, stereo analog, AES, and AES42 microphones, on a boom pole or handheld.
Cones swap in the field, and each transmitter comes with the cone chosen when ordering; extra cones are sold separately. The body combines high-strength nylon polymer and aluminum.
Encrypted Audio and Internal Recording
Fully digital modulation keeps the transmission encrypted and private. The TRX743 records the same audio to a removable microSD card while it transmits. Recordings use Zaxcom’s MARF format, which keeps the file intact if the battery dies or the card comes out early.
ZaxNet and PowerRoll
ZaxNet, Zaxcom’s 2.4 GHz control link, lets the mixer change the frequency, preamp gain, and sleep mode without disturbing talent. It also starts, stops, and plays back the transmitter’s internal recording. Replay against timecode turns the transmitters’ cards into a virtual multitrack system, so the mixer can remix and re-record a take. Quality-control audio also goes out over ZaxNet, so the mic can be checked on the spot with an ERX receiver.
PowerRoll raises the transmitter’s output to 100 mW while a ZaxNet recorder is recording its audio and drops the output to 25 mW the rest of the time, which saves battery.
NeverClip, ZHD, and Power
NeverClip extends the dynamic range to 126 dB on every mono transmission type. ZHD modulation fits 4 to 9 channels into each megahertz of spectrum for crowded city locations, and XR mode gives the longest range in more controlled spaces.
Three AA batteries power the TRX743, with runtime set by the battery type and the mic’s power draw. The TRX743.5 covers 512 to 614 MHz, and the TRX743.6 covers 596 to 698 MHz for use outside the US.
Features
- Wide-band digital plug-on transmitter
- Interchangeable cones for mono analog, stereo analog, AES, and AES42 mics
- 48 V phantom power and 10 V AES42 power
- Encrypted transmission
- Internal microSD recording with timecode
- NeverClip, 126 dB dynamic range
- ZaxNet remote control and QC audio
- PowerRoll output switching
- 25, 50, or 100 mW output
- Runs on three AA batteries
Available Options
| Frequency | Cone | Connector | Microphones |
|---|---|---|---|
| 512 – 614 MHz | Mono Analog | 3-pin XLR | Mono analog mics, with 48 V phantom power |
What's Included
- TRX743 plug-on transmitter
- One plug-on cone, the type chosen when ordering
Specifications
| Transmitter | |
|---|---|
| RF Modulation | Proprietary digital |
| TRX743.5 Frequency Range | 512 – 614 MHz |
| TRX743.6 Frequency Range | 596 – 698 MHz |
| RF Frequency Step | 100 kHz |
| RF Bandwidth | ZHD 50 kHz; XR 200 kHz |
| Channel Separation | ZHD as close as 100 kHz (receiver dependent); XR 400 kHz |
| Antenna Connector | SMA female, 50 Ω |
| Emission Designator | 180KV2E, 100KV2E, 50KV2E |
| FCC | Part 74.861 |
| Power Output | 25, 50, or 100 mW, software selectable |
| Audio | |
| Dynamic Range | 126 dB (stereo model 106 dB) |
| Distortion | 0.002% |
| High-Pass Filter | Off or 30 – 220 Hz, in steps |
| Mic Connector | 3-pin or 5-pin XLR |
| Analog Mic Power | 48 V phantom, 10 mA max |
| Digital Mic Power | 10 V AES42, 200 mA max |
| Input Range | −60 to −30 dBu |
| Mic Impedance | 4.7 kΩ |
| A/D Conversion | 24-bit |
| Audio Interfaces | Balanced analog mono, balanced stereo, AES42, and AES |
| Timecode and Recording | |
| Clock Accuracy | 1.54 PPM (1 frame in 6 hours) |
| Timecode Type | SMPTE |
| Frame Rates | 23.98, 24, 25, 29.97 NDF, 29.97 DF, 30 NDF, 30 DF |
| Media | microSD card |
| File Format | .ZAX |
| ZaxNet Receiver | |
| RF Frequency Range | 2.403 – 2.475 GHz |
| RF Modulation | Digital spread spectrum |
| RF Frequency Step | 1 MHz |
| RF Bandwidth | 1 MHz |
| Channel Separation | 2 MHz |
| Sensitivity | −96 dBm |
| Physical and Power | |
| Dimensions | 5 × 11.5 × 4 cm, H x W x D |
| Weight | 7.5 oz with batteries |
| Display | Graphic OLED |
| Batteries | 3 x AA |
| Battery Life | Depends on battery type and mic power |
| Latest Specifications | Specifications are subject to change without prior notice. For current information, visit zaxcom.com. |
