Lectrosonics WM - Manual - Manual (Page 20)

WM
LECTROSONICS, INC. 20
Operating frequencies:
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
Specifications
Block 23 588.800 - 607.900
614.100 - 614.300
Block 24 614.400 - 639.900
Block 25 640.000 - 665.500
Block 26 665.600 - 691.100
Channel Spacing: 100 kHz
Frequency selection: Control panel mounted membrane switches
RF Power output: Switchable; 50, 100 or 250 mW
Compatibility Modes (6) Digital Hybrid Wireless ® (400 Series),
200 Series, 100 Series, Mode 3, Mode 6, IFB
Pilot tone: 25 to 32 kHz; 5 kHz deviation
(in 400 Series Hybrid Mode)
Frequency stability: ± 0.002%
Deviation: ± 75 kHz max. (in 400 Series Mode)
Spurious radiation: 60 dB below carrier
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
30 100 1kHz 10k 20k
+6
+3
0dB
-3
-6
-9
-12
Line in
Mic in 150 Hz
Roll-off
Mic in 35 Hz
Roll-off
Audio Frequency Response: 35 Hz to 20 kHz, +/-1 dB (The low frequency
roll-off is adjustable - see graph above)
Signal to Noise Ratio (dB):
(overall system, 400 Series mode)
(Note: the dual envelope “soft”
limiter provides exceptionally
good handling of transients
using variable attack and release
time constants. The gradual onset of limiting in the design begins below full modulation,
which reduces the measured figure for SNR without limiting by 4.5 dB)
SmartNR No Limiting w/Limiting
OFF 103.5 108.0
NORMAL 107.0
111.5
FULL 108.5 113.0
Total Harmonic Distortion: 0.2% typical (400 Series 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
Battery Life: Lithium
50 mW (2 AA): 14.5 hrs
100 mW (2 AA): 14 hrs
250 mW (2 AA): 7.5 hrs
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: 180KF3E
Specifications subject to change without notice.
AA battery compartments are O-ring sealed
The recess in the battery compartment
traps the O-ring for a tight seal.