Lectrosonics WM Digital Hybrid Wireless Beltpack Transmitter, 20 512.000 - 537.575 MHz

Designed for wet or dusty environments, the WM transmitter features O-ring sealed battery compartments and input jack, a compression sealed antenna port and gasket sealed control panel and back cover. Dual AA batteries provide twice the operating time of earlier watertight transmitter designs. Larger membrane switches and control panel and a highly visible, backlit LCD enhance the user interface.

Key Features

• Selectable output power to maximize battery life or and for excellent operating range (50, 100 or 250 mW)
• Machined aluminum, corrosion resistant housing
• Water resistant seals for use in wet environments
• LCD interface with lockout option
• Programmable compatibility modes for use with a wide variety of different receivers
• Servo Bias input circuitry with selectable voltage

Technical Specifications

Operating frequencies:
WM
Block 470 470.100 - 495.600
Block 19 486.400 - 511.900
Block 20 512.000 - 537.500
Block 21 537.600 - 563.100
Block 22 563.200 - 588.700
Block 23 588.800 - 614.300
Channel Spacing
25 kHz or 100 kHz
Frequency selection
Control panel mounted membrane switches
RF Power output
50, 100 or 250 mW
Compatibility Modes WM
Nu Hybrid, IFB, Mode 3
Pilot tone
3.5 kHz deviation (Nu Hybrid)
25 to 32 kHz; 3 kHz deviation (Digital Hybrid Mode)
Frequency stability
± 0.002%
Spurious radiation
Compliant with ETSI EN 300 422-1 v1.4.2
Equivalent input noise
-125 dBV, A-weighted
Input level
Dynamic mic
0.5 mV to 50 mV before limiting.
Greater than 1 V with limiting.

Electret lavaliere 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 5 V with limiting.
Input impedance
Dynamic mic, 300 Ohms
Electret lavaliere, 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
Selectable; 2V, 4V and Off
Gain control range
44 dB; panel mounted membrane switches
Modulation indicators
Dual bicolor 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
Total Harmonic Distortion
0.2% typical (Nu Hybrid mode)
Audio Input Jack
2.5 mm locking micro; threaded for stainless sleeve on WP connector
Antenna
Flexible, unbreakable steel cable.
Batteries
1.5 Volt AA (lithium recommended)
Weight
5.33 oz. (151 grams) with lithium batteries
Housing Dimensions
2.98 x 2.55 x 0.77 inches
75.7 x 64.8 x 19.6 mm
(including battery caps)
Emission Designator
110KF3E
Included Accessories
2 - Dual Lithium AA Batteries
1 - Microphone (Part #M152/WP)
1 - Belt Clip (Part #WMBCSL)
1 - O-ring Kit (Part #ORINGKIT/WM)
1 - Quickstart Guide