Lectrosonics SMV Variable Power Transmitter, Single Battery - Back-Lit Version

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To meet the demand for both extended operating range and extended battery life, the Lectrosonics SMV or "V" series SM transmitters offer selectable output power ranging from 50, 100 and 250 mW. With higher power output, the operating range is improved at the expense of battery life. When range is not an issue, the power can be reduced to extend the battery life.

The Lectrosonics SMV is compatible with the RM and RM2 remote control units for hands free setup and adjustment using audible tones delivered into the microphone from a tiny loudspeaker in the remote control unit. The transmitter can be put to sleep to conserve battery power during setup while the transmitter is buried deep inside costuming, then awakened for normal operation when the production begins. Other features include frequency and audio level adjustment and control lockout.

The DSP-based design works with all Digital Hybrid receivers, and is backward compatible for use with Lectrosonics 200 and 100 Series and IFB receivers and some other brands of analog wireless receivers. Companion receivers are covered in separate manuals.

The input section features the unique servo bias input circuitry with a standard TA5M type jack for use with electret lavaliere mics, dynamic mics, or line level signals. A DSP-controlled analog audio limiter is employed ahead of the first mic preamp to protect the entire audio chain from overload. The limiter has a range of more than 30 dB for excellent overload protection and a dual release envelope that makes the limiter acoustically transparent while maintaining low distortion. The limiter recovers quickly from brief transients with no distortion.

A water resistant control panel with LCD, membrane switches and multicolor LEDs make input gain adjustments, frequency and compatibility mode selection quick and accurate. The battery compartment accepts lithium or rechargeable AA batteries.

The housings are machined from solid aluminum blocks to provide an extremely lightweight and rugged package. A special non-corrosive finish resists salt water exposure and perspiration in extreme environments.

The Digital Hybrid Wireless® design combines 24-bit digital audio with analog FM resulting in a system that has the same operating range as analog systems, the same spectral efficiency as analog systems, the same long battery life as analog systems, plus the excellent audio fidelity typical of pure digital systems. Please select frequency block when ordering.

Lectrosonics SMV - Features:

• Selectable output power to optimize battery life or operating range: 50 mW, 100 mW, 250 mW
• Membrane switch control panel with LCD display
• 256 synthesized UHF frequencies
• Wide input dynamic range
• DSP based pilot-tone signal
• Circulator/Isolator output stage
• Splash-proof, machined aluminum housing
• Non-corrosive, super-hard finish

CONSUMER ALERT: This particular wireless microphone device operates in portions of the 617-652 MHz or 663-698 MHz frequencies. Beginning in 2017, these frequencies are being transitioned by the Federal Communications Commission (FCC) to the 600 MHz service to meet increasing demand for wireless broadband services. Users of this device must cease operating on these frequencies no later than July 13, 2020. In addition, users of this device may be required to cease operations earlier than that date if their operations could cause harmful interference to a 600 MHz service licensee’s wireless operations on these frequencies. For more information, visit the FCC's wireless microphone website or call the FCC at 1-888-CALL-FCC (TTY: 1-888-TELL-FCC).

• Operating Frequencies:
  • Block 19: 486.400 to 511.900
  • Block 20: 512.000 to 537.500 MHz
  • Block 21: 537.600 to 563.100 MHz
  • Block 22: 563.200 to 588.700 MHz
  • Block 24: 614.400 to 639.900 MHz
  • Block 25: 640.000 to 665.500 MHz
  • Block 26: 665.600 to 691.100 MHz
  • Block 470 470.100 to 495.600 MHz
  • 941 Band (US Only):
    • 941.525 to 951.975 MHz
    • 952.875 to 956.225 MHz
    • 956.475 to 959.825 MHz
• Channel Spacing: Selectable, 25 or 100 kHz
• Frequency Selection: Control panel mounted membrane switches
• RF Power Output: Switchable, 50, 100, or 250 mW (not available for 941 Band)
• Compatibility Modes (6): Digital Hybrid Wireless® (400 Series), 200 Series, 100 Series, Mode 3 , Mode 6, IFB
• Pilot Tone: 25 to 32 kHz frequency (Digital Hybrid mode); 5 kHz deviation | 941 Band: 27 to 32 kHz frequency (Digital Hybrid mode); 3 kHz deviation
• Frequency Stability: ± 0.002%
• Deviation: ± 50 kHz (max., 400 Series only)
• Spurious Radiation: 60 dB below carrier
• Equivalent Input Noise: -125 dBV (A-weighted)
• Input Level:
  • If set for dynamic mic: 0.5 mV to 50 mV before limiting. Greater than 1 V with limiting.
  • If set for electret lavalier mic: 1.7 uA to 170 uA before limiting. Greater than 5000 uA (5 mA) with limiting.
  • Line level input: 17 mV to 1.7 V before limiting. Greater than 50 V with limiting.
• Input Impedance:
  • Dynamic Mic: 300 Ohms
  • Electret Lavalier: Input is virtual ground with servo adjusted constant current bias
  • Line Level: 2.7 k Ohms
• Input Limiter: Soft limiter, 30 dB range
• Bias Voltages: Fixed 5 V at up to 5 mA. Selectable 2V or 4V servo bias for any electret lavalier.
• Gain Control Range: 44 dB; panel mounted membrane switches
• Modulation Indicators: Dual bi-color LEDs indicate modulation of -20, -10, 0, +10 dB referenced to full modulation
• Controls: Control panel with LCD and four membrane switches
• Low Frequency Roll-Off: Adjustable from 35 to 150 Hz
• Audio Frequency Response: 35 Hz to 20 kHz, ± 1 dB
• Signal to Noise Radio (dB; Overall System, 400 Series Mode):

  SmartNR	No Limiting	With Limiting
  OFF	103.5	108.0
  NORMAL	107	111.5
  FULL	108.5	113

  ^{Note: The dual envelope "soft" limiter provides exceptionally good handling of transients using variable attack and release time constants. Once activated, the limiter compresses 30+ dB of transmitter input range into 4.5 dB of receiver output range, thus reducing the measured figure for SNR without limiting by 4.5 dB.}
• THD: 0.2% typical (400 Series only)
• Audio Input Jack: Switchcraft 5-pin locking (TA5F)
• Antenna: Flexible, unbreakable steel cable
• Battery: (1) 1.5 Volt AA Lithium
• Battery Life, (1) AA Lithium:
  • SMV 50mW: 7.25 hours
  • SMV 100mW: 5.5 hours
  • SMV 250mW: 3 hours (lithium); not applicable to 941 Band
• Emission Designator: 180KF3E
• Dimensions: 2.3 x 1.8 x .64 in | 58 x 46 x 16 mm, not including microphone
• Weight: 2.7 oz | 76 g, including lithium battery