MPN #ZMT4    


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Ultra-small wideband wireless microphone transceiver with internal recording, phantom power and NeverClip technology

You've been asking, and we've been listening. The ZMT4 has taken digital recording wireless to the next level with 30% better power consumption, NeverClip? in all modes, and power for all microphones - from a 5V lavalier to a 48V phantom powered mic - and a new ultra-low noise preamp.

Deliver pristine audio quality with our ZMT4, an incredibly small, lightweight, talent-friendly transmitter ideal for sound professionals. Weighing only 2.2oz (62g), the ZMT4 is constructed from a high-strength, impact-resistant nylon polymer casing with rounded edges and machined metal that's cool to the touch.

The ZMT4 has a wide range of power to cover nearly any professional analog microphone - 5V lavalier mics as well as condenser, balanced dynamic or ribbon microphones running at 12, 24, 36 or 48V.

Perfect for boom pole operation, the ZMT4 can be positioned at the top of a boom pole directly behind the microphone instead of near the bottom. By removing the internal or external cable, operators can eliminate cable noise that can affect the audio track. Boom microphone connectivity is via a 3-pin balanced LEMO.

The ZMT4 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.

This new feature in the ZMT4 improves radiation of the bodypack's antenna when it's placed in contact or near the human body. Normally, putting a bodypack on talent decreases transmission range because the body absorbs some of the signal. With adaptive antenna optimization, the external antenna is actively matched to its condition to optimize radiation and minimize distortion, keeping the signal at its best.

The ZMT4 features an all-new preamp design. The noise content of the preamp and A-D combination now utilizes NeverClip? with both lav and balanced boom mics, making the environment and self-noise of the microphone the dominant noise components.

NeverClip is available in all modes on the ZMT4. It works by utilizing two A-D converters to extend the dynamic range of the transmitter to 136 dB, so there's never any limiter distortion.

Audio is simultaneously transmitted and recorded to a removable microSD card using the highly reliable MARF (Mobile Audio Recording Format) which eliminates file corruption common to recordings due to a dead battery or early card removal.

ZMT4 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.

To extend battery life, PowerRoll adjusts the ZMT4's power level to 50mW when the audio received from it is being recorded by a ZaxNet? compatible recorder. When the transmitter audio isn't being recorded the power is automatically reduced to 10mW.

The range will always vary depending on your environment, but you've got choices to optimize transmission for peak performance. Zaxcom High Density modulation (ZHD) increases the number of available channels from 4 to 9 for every 1 MHz of spectrum space, perfect for reflective environments like busy city streets. XR gives you the maximum distance in less dense / more controlled spaces.

The ZMT4 has up to 30% better battery life than its predecessor. A single NP-50 battery provides up to 6 hours of runtime with a lavalier running at 5v and up to 4.5 hours of runtime while using a 12-48v boom microphone.

ZMT4 is available in the following frequency bands:
".5 band" (512-608 MHz)
".6 band" (578-698 MHz) (not available in the U.S.)
RF Modulation: Proprietary Digital Method
ZMT4.5 RF Frequency Range: 512 - 608 MHz
ZMT4.6 RF Frequency Range: 578 - 698 MHz
RF Frequency Step: 100 KHz
RF Bandwidth in ZHD96 Mode: 100 KHz
RF Bandwidth in XR Mode: 200 KHz
Channel Separation in ZHD96 Mode: as close as 200 KHz
Channel Separation in XR Mode: 400 KHz
Antenna Connector: 50 SSMA Female
Emission Designator: 180 KV2E, 100 KV2E
FCC Part: 74.861

Dynamic Range: 136 dB
Distortion: 0.01%
Frequency Response: Mode 0: 20 Hz to 16 kHz / T & M Mode 0.2 Hz to 16 kHz
High Pass Filter: Off or 70 to 220 Hz, Steps: 10 (6dB Per Octave)
Unbalanced Lavaliere Mic Power: 5.0v @ 10mA max
Balanced Mic Power: 12v @ 25mA max
Balanced Mic Power: 24v @ 10mA max
Balanced Mic Power: 36v @ 10mA max
Balanced Mic Power: 45v @ 10mA max
Mic Connector: 3-Pin Micro LEMO
Mic Configuration: Balanced (3-wire) / Unbalanced (2-wire)
Input Range: -60 to -30 dBu
Mic Impedance: 3.4 k (680 with 12v power mode)
ADC Bit-Depth: 32 Bits
ADC Sampling-Rate: 32 kHz

Clock Accuracy: 1.54 PPM (1 Frame in 6 Hours)
Timecode Type: SMPTE
Timecode Frame-Rates: 23.98, 24, 25, 29.97NDF, 29.97DF, 30NDF, 30DF

Media: MicroSD Card (Flash Memory)
File Format: .ZAX / Converts to BWAV or MP3

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

Weight: 2.2 oz / 62 grams with Battery
Dimensions (H x W x D): 2.2 x 1.6 x .55 / 55.8mm x 40.6mm x 14mm
Display: Graphic OLED

Power Output: 10 / 50 mW - Software Selectable
Power Consumption: 125 mA @ 4.2v with 50mW TX (no ZaxNet or Phantom pwr)
Battery Type: NP-50
Lavalier Battery Life: Up to 6 hours
Phantom Power Battery Life: Up to 4.5 hours
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