Lectrosonics HMa UHF Plug-On Wireless Transmitter (A1: 470.100 to 537.575 MHz)

Lectrosonics HMa UHF Plug-On Wireless Transmitter (A1: 470.100 to 537.575 MHz)

Lectrosonics HMa UHF Plug-On Wireless Transmitter (A1: 470.100 to 537.575 MHz)

B&H # LEHMAA1 MFR # HMA-A1
Lectrosonics HMa UHF Plug-On Wireless Transmitter (A1: 470.100 to 537.575 MHz)

Lectrosonics HMa UHF Plug-On Wireless Transmitter (A1: 470.100 to 537.575 MHz)

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Product Highlights

  • For Broadcast, EFP and ENG Applications
  • Accepts Mic or Line-Level Signals
  • Up to 3072 Selectable Frequencies
  • Low Frequency Roll-Off
  • Transmits on Block A1
  • Powered by Two AA Batteries
  • USB port for Firmware Updates
  • IR (Infrared) Port for Fast Setup
  • Solid Machined Aluminum Housing
  • Built-In Antenna
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  • 1Description
The HMa from Lectrosonics is a UHF plug-on transmitter that accepts mic or line-level signals via a standard XLR connector. It has selectable 5, 15, & 48V phantom power and can be used when paired with a Lectrosonics receiver and handheld microphone - sold separately - in applications for ENG (Electronic News Gathering), EFP (Electronic Field Productions), interviews for broadcast TV, and more.

The input amplifier of the HMa transmitter uses an ultra-low noise op-amp for quiet operation and is gain controlled with a wide range dual envelope limiter. A 24-bit A to D converter digitizes the audio, and filters the supersonic noise above 21 kHz. The resulting signal is encoded with a proprietary algorithm to produce an analog data signal for RF transmission.

Featuring a wide tuning range of 76 MHz, with tuning steps in increments of 100 kHz or 25 kHz for up to 3072 frequencies, the HMa transmitter also covers three standard 25.6 MHz Lectrosonics frequency blocks. Each block provides 256 different pilot tone frequencies. Legacy analog wireless microphone and IFB receivers are designed to work in DSP compatibility mode, as well as some receivers from other manufacturers.

Finally, the transmitter is powered by two AA batteries, with status indicated by a multi-color LED. A USB port is also provided for firmware updates, and an IR (infrared) port is included to simplify setup with IR enabled receivers.

Digital Hybrid Wireless is a revolutionary design that combines digital audio with an analog FM radio link to provide outstanding audio quality and the exemplary RF performance of the finest analog wireless systems
Multi-color LED status indicator
Selectable 50/100 mW output power
76 MHz tuning range in 100 kHz or 25 kHz steps for up to 3072 frequencies
The antenna is formed between the machined aluminum housing of the transmitter and the attached microphone or cable. It functions as a dipole radiator when attached to a hand-held microphone and somewhat like a ground plane antenna when connected with a cable or plugged directly into a mixer
In the Box
Lectrosonics HMa UHF Plug-On Wireless Transmitter (A1: 470.100 to 537.575 MHz)
  • PHTRAN3 Leather Pouch
  • 2 x AA Alkaline Batteries
  • Limited 1-Year Warranty
  • Table of Contents
    • 1Description
    Frequency Selection Steps Selectable; 100 kHz or 25 kHz
    Operating Frequency A1: 470.100 to 537.575 MHz
    RF Power Output Selectable 50/100 mW
    Pilot Tone 25 to 32 kHz; 5 kHz deviation (in the Digital Hybrid mode)
    Frequency Stability ± 0.002%
    Deviation ± 75 kHz (max in Digital Hybrid mode)
    Spurious Radiation 60 dB below carrier
    Equivalent Input Noise -125 dBV (A-weighted)
    Input Level Nominal 2 mV to 300 mV, before limiting; greater than 1V maximum, with limiting
    Input Impedance 300 ohms
    Limiter Dual envelope "soft" limiter; greater than 30 dB range
    Gain Range 55 dB; panel mounted membrane switches
    Modulation Dual bi-color LEDs indicate modulation of -20, -10, 0, +10 dB referenced to full modulation
    Frequency Response 35 Hz to 20 kHz (+/-1 dB)
    Low Frequency Roll-Off Adjustable for -3 dB @ 30, 50, 70 Hz
    THD 0.2% (typ. 100 Hz to 20 kHz)
    Signal to Noise Ratio SmartNR Off
    • no limiting: 103.5 dB
    • limiting: 108 dB

    SmartNR Normal
    • no limiting: 107 dB
    • limiting: 111.5 dB

    SmartNR Full
    • no limiting: 108.5 dB
    • limiting: 113 dB
    Dynamic Range 125 dB (with full Tx limiting)
    Controls and Indicators
    • Power/Phantom "ON-OFF" switch
    • Phantom voltage selector switch
    • Audio input gain knob
    • LCD w/ membrane switches
    • LED audio level indicators
    Audio Input Jack Standard 3-pin XLR (female)
    Phantom Power Off; 5 V @ 18 mA max; 15 V @ 15 mA max; 48 V @ 4 mA max
    Antenna Housing and attached microphone form the antenna
    Battery Two 1.5 Volt AA lithium or rechargeable NiMH recommended
    Battery Life Alkaline
    • No Phantom: 5 hrs
    • 48 V on: 3.5 hrs
    Emission Standard 180KF3E
    Dimensions 4.25 x 1.62 x 1.38" (10.8 x 4.1 x 3.5 cm)
    Weight 7.5 oz (211 g) with AA batteries
    Packaging Info
    Package Weight 1.15 lb
    Box Dimensions (LxWxH) 9.8 x 7.8 x 3.0"

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