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Lectrosonics HMa UHF Plug-On Transmitter



Product Description

Lectrosonics HMa UHF Plug-On Transmitter

This unique plug-on transmitter design will ideally match any microphone or line level source via a standard XLR connector. Phantom power is selectable at 5, 15 and 48 volts, or can be turned off for use with dynamic microphones and line level signal sources.

The design includes a wide tuning range of up to 76 MHz, with tuning steps in increments of 100 kHz or 25 kHz for up to 3072 frequencies. The tuning range covers three standard 25.6 MHz Lectrosonics frequency blocks. Each of the standard blocks includes 256 different pilot tone frequencies for compatibility with all Digital Hybrid Wireless receivers.

DSP compatibility modes are also included to work with legacy Lectrosonics analog wireless microphone receivers and IFB receivers, as well as some receivers from other manufacturers.

Key Features:

  • Accepts microphone or line level signals
  • Selectable 5, 15, 48 volt phantom power
  • 76 MHz tuning range in 100 kHz or 25 kHz steps for up to 3072 frequencies
  • Selectable 50/100 mW output power
  • Adjustable low frequency roll-off
  • Powered by two AA batteries
  • USB port for firmware updates
  • IR (infrared) port for fast setup
  • Solid machined aluminum housing


Operating Frequencies:
  • Band A1: 470.100 – 537.575
  • Band B1: 537.600 – 614.375
  • Band C1: 614.400 – 691.175
Frequency Selection Steps:
Selectable; 100 kHz or 25 kHz
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%
± 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:
1K Ohm
Input limiter:
Dual envelope “soft” limiter; greater than 30dB range
Gain control range:
55 dB; panel mounted membrane switches
Modulation indicators:
Dual bi-color LEDs indicate modulation of -20, -10, 0, +10 dB referenced to full modulation
Frequency Response:
35 Hz to 20 kHz (+/-1dB);
Low frequency Roll-off:
Adjustable for -3dB @30, 50, 70, 100, 120 or 150 Hz)
0.2% (typ. 100 Hz to 20 kHz)
Input Dynamic Range:
125 dB (with full Tx limiting)
Audio Input Jack:
Standard 3-pin XLR (female)
Phantom Power:
5V @ 18 mA max., 15V @ 15 mA max. and 48 V @ 4 mA max., plus “OFF”

Manuals & Docs