Specifications And Features - Lectrosonics LMb Instruction Manual

LMb

Specifications and Features

Operating Frequencies:
Block A1: 470.100 - 537.575
Block B1: 537.600 - 614.375
Block C1: 614.400 - 691.175
Block D1: 691.200 - 767.975 (export only)
Frequency Selection Steps: Selectable; 100 kHz or 25 kHz
RF Power output: 50 mW
Pilot tone: 25 to 32 kHz; 5 kHz deviation
(Digital Hybrid mode)
Frequency Stability: ± 0.002%
Deviation: ± 75 kHz max. (Digital Hybrid mode)
Spurious radiation: 60 dB below carrier
Equivalent input noise: –120 dBV (A-weighted)
Input level: Nominal 2 mV to 300 mV, before limiting
Greater than 1V maximum, with limiting.
Input impedance: • Mic: 300 Ohm
• Line: 2k Ohm
Input limiter: DSP controlled, dual envelope "soft" limiter
with greater than 30 dB range
Gain control range: 44 dB; digital control
Modulation indicators: • Dual bicolor LEDs indicate modulation of
-20, -10, 0 and +10 dB referenced to full
modulation
• LCD bar graph
Controls: • Top panel toggle switch; programmable as
power, mute, talkback or none (off) function
• Side panel membrane switches with LCD
interface for power on/off and all setup and
configuration controls
Audio Input Jack: Switchcraft 5-pin locking (TA5F)
Antenna: Galvanized steel, flexible wire
Battery: Two AA; alkaline, lithium, NiMH rechargeable
Battery Life: • Alkaline: 4.5 hours
• Duracell Quantum: 7 hours
• Eneloop 2400 mAH NiMH: 8 hours;
new batteries fully charged
Weight: 5.8 ounces (141 grams), including lithium AA batteries
and wire belt clip
Dimensions: 3.2 x 2.4 x .9 in. (81 x 61 x 20 mm)
Emission Designator: 180KF3E
For body worn operation, this transmitter model has been tested and meets the FCC RF exposure
guidelines when used with the Lectrosonics accessories supplied or designated for this product. Use of
other accessories may not ensure compliance with FCC RF exposure guidelines. Contact Lectrosonics
if you have any questions or need more information about RF exposure using this product..
This device complies with FCC radiation exposure limits as set forth for an uncontrolled environment.
This device should be installed and operated so that its antenna(s) are not co-located or operating in
conjunction with any other antenna or transmitter.
This device complies with Industry Canada radiation exposure limits as set forth for a controlled
"professional" use only.
Cet appareil est conforme avec les normes d'Industrie Canada concernant les limites d'exposition aux
radiations pour un usage professionnel contrôlé seulement.
18
Audio Performance (Digital Hybrid mode)
Frequency Response: • Mic: 70 Hz to 20 kHz (+/-1dB)
• Line/Instrument: 35 Hz to 20 kHz (+/-1dB)
Low frequency roll-off:
Mic input: -3 dB at 70 Hz, slope steepens at lower frequencies
THD: 0.2% (typical)
SNR at receiver output:
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
Specifications subject to change without notice
SmartNR No Limiting w/Limiting
OFF 103.5 108.0
NORMAL 107.0 111.5
FULL 108.5 113.0
LECTROSONICS, INC.