Lectrosonics HM Digital UHF Wireless Plug-On Microphone Transmitter (Freq Block 23)

Model #HM-23

Lectrosonics hm 23 1
Lectrosonics hm 23 1
Lectrosonics hm 23 2
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Packaging Info

Package Weight 1.15 lb
Box Dimensions (LxWxH) 9.7 x 7.9 x 3.0"

General Information

RF Power Output 100 mW (nominal)
Pilot Tone 25 to 32 kHz; 5 kHz deviation (in the 400 Series operating mode)
Frequency Stability ± 0.002%
Deviation ± 75 kHz (max)
Spurious Emission 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 (+/-1dB)
Frequency Selection 256 frequencies in 100 kHz steps
THD 0.2% (typ. 100 Hz to 20 kHz)
Signal to Noise Ratio SmartNR Offno limiting: 103.5 dBlimiting: 108 dBSmartNR Normalno limiting: 107 dBlimiting: 111.5 dBSmartNR Fullno limiting: 108.5 dBlimiting: 113 dB
Dynamic Range 125 dB (with full Tx limiting)
Controls and Indicators Power/Phantom "ON-OFF" switchPhantom voltage selector switchAudio input gain knobLCD w/membrane switchesLED audio level indicators
Audio Input Jack Standard 3-pin XLR (female)
Phantom Power Off; 5V @ 18 mA max; 15V @ 15 mA max; 48V @ 4 mA max
Antenna Housing and attached microphone form the antenna
Battery Two 1.5 Volt AA lithium or rechargeable NiMH recommended
Battery Life AlkalineNo Phantom: 5 hrs48V on: 3.5 hrsNiMH 2500No Phantom: 9.25 hrs48V on: 7 hrsLithiumNo Phantom: 16 hrs48V on: 12.75 hrs
Emission Standard 180KF3E
Dimensions 4.25 x 1.62 x 1.38" (10.8 x 4.1 x 3.5 cm)
Weight 6.7 oz (190 g) without batteries
Low Frequency Roll-Off Adjustable for -3 dB @ 30, 50, 70 Hz
Operating Frequency 588.800 - 607.900, 614.100 - 614.300 MHz
Product Highlights
  • Frequency Block 23
  • Digital Hybrid Wireless Technology
  • Membrane-Switch Controls w/ LCD Display
  • Converts XLR Mic Signals to UHF Wireless
  • Phantom Power: 5, 18, and 48 Volts
  • Adjustable Low Frequency Roll-Off
  • 256 Synthesized UHF Frequencies
  • 100 mW Output Power
  • Rugged, Machined Aluminum Housing
  • Powered by Two AA Batteries
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