Lectrosonics HMa Plug-On Wireless Transmitter (A1: 470 to 537 MHz)

BH #LEHMAA1 • MFR #HMA-A1
Lectrosonics
Lectrosonics HMa Plug-On Wireless Transmitter (A1: 470 to 537 MHz)
Key Features
  • For Broadcast, EFP and ENG Applications
  • Accepts Mic or Line-Level Signals
  • Up to 3072 Selectable Frequencies
  • Transmits on Block A1
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.
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$1,215.00
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Lectrosonics Hma Overview

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

Lectrosonics Hma Specs

Frequency Selection StepsSelectable; 100 kHz or 25 kHz
Operating FrequencyA1: 470 to 537 MHz
RF Power OutputSelectable 50/100 mW
Pilot Tone25 to 32 kHz; 5 kHz deviation (in the Digital Hybrid mode)
Frequency Stability± 0.002%
Deviation± 75 kHz (max in Digital Hybrid mode)
Spurious Radiation60 dB below carrier
Equivalent Input Noise-125 dBV (A-weighted)
Input LevelNominal 2 mV to 300 mV, before limiting; greater than 1V maximum, with limiting
Input Impedance300 ohms
LimiterDual envelope "soft" limiter; greater than 30 dB range
Gain Range55 dB; panel mounted membrane switches
ModulationDual bi-color LEDs indicate modulation of -20, -10, 0, +10 dB referenced to full modulation
Frequency Response35 Hz to 20 kHz (+/-1 dB)
Low Frequency Roll-OffAdjustable for -3 dB @ 30, 50, 70 Hz
THD0.2% (typ. 100 Hz to 20 kHz)
Signal to Noise RatioSmartNR 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 Range125 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 JackStandard 3-pin XLR (female)
Phantom PowerOff; 5 V @ 18 mA max; 15 V @ 15 mA max; 48 V @ 4 mA max
AntennaHousing and attached microphone form the antenna
BatteryTwo 1.5 Volt AA lithium or rechargeable NiMH recommended
Battery LifeAlkaline
  • No Phantom: 5 hrs
  • 48 V on: 3.5 hrs
Emission Standard180KF3E
Dimensions4.25 x 1.62 x 1.38" / 10.8 x 4.1 x 3.5 cm
Weight7.5 oz / 211 g with AA batteries
Packaging Info
Package Weight1.15 lb
Box Dimensions (LxWxH)9.8 x 7.8 x 3"
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