Zaxcom TRXFB3 Wideband Transmitter and IFB Receiver
- Transmitter and IFB receiver in one bodypack
- Encrypted audio with internal recording
- Up to 7 hours on two AA lithium batteries
From $2,450.00 USD
Zaxcom TRXFB3 Wideband Transmitter and IFB Receiver
The Zaxcom TRXFB3 puts a wideband transmitter and an IFB receiver in one bodypack, sending audio and timecode over UHF while it receives IFB audio over ZaxNet’s 2.4 GHz signal.
Talent wears one pack instead of a transmitter and a separate IFB receiver, with an earpiece plugged into its 3.5 mm jack. A programmable button works as push to mute or push to talk.
Encrypted Audio and Internal Recording
The fully encrypted digital transmission prevents eavesdropping, and the TRXFB3 records the same audio to an internal microSD card. Recordings use Zaxcom’s MARF format, which keeps the file intact if the battery dies or the card comes out early. Replay against timecode lets the mixer remix and re-record a take, using the transmitters as a virtual multitrack playback system.
ZaxNet Remote Control
ZaxNet is Zaxcom’s 2.4 GHz control link. From a ZRC remote or any ZaxNet device, the operator can change the frequency, output power, and input gain, start and stop the recorder, manage timecode, and format the card without touching the talent. Quality-control audio also goes out over ZaxNet, so the mic can be checked on the spot with an ERX receiver.
NeverClip, ZHD, and PowerRoll
NeverClip extends the dynamic range to 126 dB, leaving headroom when levels jump. ZHD modulation fits more channels into each megahertz of spectrum for crowded RF environments, and the TRXFB3 has Mono, Stereo, XR, ZHD48, and ZHD96 modes.
PowerRoll lowers the output when the transmitter is idle and raises it when recording starts, which saves battery.
Mic Input and Power
A 3-pin micro LEMO input powers 3.3 V lavaliers. Two AA lithium batteries run the TRXFB3 for up to 7 hours at 100 mW. The TRXFB3.5 is the US model, and the TRXFB3.6 is for use outside the US.
Features
- UHF transmitter and ZaxNet IFB receiver in one pack
- 3.5 mm earpiece jack
- Programmable push-to-mute or push-to-talk button
- Encrypted transmission
- Internal microSD recording with timecode
- NeverClip, 126 dB dynamic range
- ZaxNet remote control and QC audio
- Mono, Stereo, XR, ZHD48, and ZHD96 modes
- PowerRoll battery saving
- Up to 7 hours on two AA lithium batteries
Specifications
| Transmitter | |
|---|---|
| RF Modulation | Proprietary digital |
| TRXFB3.5 Frequency Range | 512 – 614 MHz |
| TRXFB3.6 Frequency Range | 596 – 698 MHz |
| RF Frequency Step | 100 kHz |
| RF Bandwidth | ZHD48 50 kHz; ZHD96 100 kHz; XR 200 kHz |
| Channel Separation | ZHD48 as close as 100 kHz; ZHD96 as close as 200 kHz (receiver dependent); XR 400 kHz |
| Antenna Connector | SSMA 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 |
| Distortion | 0.002% |
| High-Pass Filter | Off or 30 – 220 Hz, in steps |
| Mic Power | 3.3 V DC |
| Mic Connector | 3-pin micro LEMO |
| Input Range | −60 to −30 dBu |
| Mic Impedance | 6.8 kΩ |
| 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 |
| Recording Time | Up to 216 hours on a 16 GB card (XR or ZHD) |
| ZaxNet IFB 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 |
| System Group Delay | 10 ms |
| IFB Dynamic Range | 96 dB |
| IFB Distortion | 0.01% |
| IFB Frequency Response | 60 Hz – 12 kHz |
| Output Connector | 3.5 mm stereo |
| Headphone Impedance | 32 – 200 Ω |
| Physical and Power | |
| Dimensions | 3.5 × 2.4 × 0.65 in, H x W x D |
| Weight | 3.7 oz without batteries |
| Display | Graphic OLED |
| Battery Life | Up to 7 hours on 2 lithium AA batteries at 100 mW |
| Latest Specifications | Specifications are subject to change without prior notice. For current information, visit zaxcom.com. |
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