MM400
Lectrosonics
MM400
Lectrosonic MM400 UHF Transmitter
This frequency agile UHF miniature transmitter offers 256 frequencies user-selectable in 100kHz steps to alleviate interference problems in traveling venues. It's a rugged, machined stainless steel package with a removable, spring loaded belt clip. Bias voltage of 3.3 volts is available to power electret mics. Level indicating LEDs on the control panel make setting levels quick and accurate without having to view the receiver.
The battery compartment accepts AA alkaline or lithium batteries. The antenna is a detachable, locking ¼ wavelength flexible bronze cable that connects to a 50 Ω SMA port on the transmitter. The transmitter will operate with any 400 Series Lectrosonics receiver in the same frequency group.
The battery compartment accepts AA alkaline or lithium batteries. The antenna is a detachable, locking ¼ wavelength flexible bronze cable that connects to a 50 Ω SMA port on the transmitter. The transmitter will operate with any 400 Series Lectrosonics receiver in the same frequency group.
Product Weight: 0.5 lbs including battery
Dimensions: 3.03"H x 2.0"W x 0.69"D excluding microphone and antenna
Technical Tools
PDF Documents
Manufacturer Specs
Operating frequencies:
537.600 to 607.900 MHz
614.100 to 793.500 MHz
Frequency selection: 256 frequencies in 100kHz steps
RF Power output: 100 mW (nominal)
Pilot tone: 25 to 32 kHz; 5kHz deviation
Frequency stability: ± 0.002%
Deviation: ± 75 kHz (max)
Spurious radiation: 90 dB below carrier
Equivalent input noise: –118 dBV, A-weighted
Input level: Nominal 2 mV to 300 mV, before limiting.
Greater than 1.5V maximum, with limiting.
Input impedance: 2 kOhm
Input limiter: Soft limiter, >30 dB range
Gain control range: 43 dB; semi-log rotary control
Modulation indicators: Dual bicolor LEDs indicate modulation of –20, -10, 0, +10 dB referenced to full modulation.
Low frequency roll-off: –12dB/octave; 70 Hz
Controls: Front panel knob adjusts audio gain.
Rotary switches on bottom panel adjust transmitter frequency.
Audio Frequency Response: 32 Hz to 20 kHz (+/-1dB - overall system)
Audio Input Jack: 2.5 mm Locking micro (matches Switchcraft 850 Microplug)
Antenna: Detachable, flexible bronze wire supplied. 50 Ω port allows
connection to test equipment.
Battery: 1.5 Volt AA lithium recommended
Battery Life: Alkaline: 2 hours
Lithium: over 5 hours (typical)
Emission Designator: 180KF3E
537.600 to 607.900 MHz
614.100 to 793.500 MHz
Frequency selection: 256 frequencies in 100kHz steps
RF Power output: 100 mW (nominal)
Pilot tone: 25 to 32 kHz; 5kHz deviation
Frequency stability: ± 0.002%
Deviation: ± 75 kHz (max)
Spurious radiation: 90 dB below carrier
Equivalent input noise: –118 dBV, A-weighted
Input level: Nominal 2 mV to 300 mV, before limiting.
Greater than 1.5V maximum, with limiting.
Input impedance: 2 kOhm
Input limiter: Soft limiter, >30 dB range
Gain control range: 43 dB; semi-log rotary control
Modulation indicators: Dual bicolor LEDs indicate modulation of –20, -10, 0, +10 dB referenced to full modulation.
Low frequency roll-off: –12dB/octave; 70 Hz
Controls: Front panel knob adjusts audio gain.
Rotary switches on bottom panel adjust transmitter frequency.
Audio Frequency Response: 32 Hz to 20 kHz (+/-1dB - overall system)
Audio Input Jack: 2.5 mm Locking micro (matches Switchcraft 850 Microplug)
Antenna: Detachable, flexible bronze wire supplied. 50 Ω port allows
connection to test equipment.
Battery: 1.5 Volt AA lithium recommended
Battery Life: Alkaline: 2 hours
Lithium: over 5 hours (typical)
Emission Designator: 180KF3E