Specifications And Features - Lectrosonics MM400B Instruction Manual

MM400B

Specifications and Features

Operating frequencies:
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Frequency selection:
RF Power output:
Pilot tone:
Frequency stability:
Deviation:
Spurious radiation:
Equivalent input noise:
Input level:
Input impedance:
Input limiter:
Gain control range:
Modulation indicators:
Low frequency roll-off:
The FCC requires that the following statement be
included in this manual:
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.
18
537.600 - 563.100
563.200 - 588.700
588.800 - 607.900 and 614.100 - 614.300
614.400 - 639.900
640.000 - 665.500
665.600 - 691.100
691.200 - 716.700
716.800 - 742.300
742.400 - 767.900
256 frequencies in 100 kHz steps
100 mW (nominal)
25 to 32 kHz; 5 kHz deviation
(in 400 Series Mode)
± 0.002%
± 75 kHz max. (in 400 Series Mode)
60 dB below carrier
–118 dBV, A-weighted
Nominal 2 mV to 300 mV, before limiting.
Greater than 1.5V maximum, with limiting.
2 kOhm
Soft limiter, >30 dB range
43 dB; semi-log rotary control
Dual bicolor LEDs indicate modulation of
–20, -10, 0, +10 dB referenced to full
modulation.
–12 dB/octave; 70 Hz
Controls:
Audio Frequency Response:
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. 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
Total Harmonic Distortion:
Audio Input Jack:
Antenna:
Battery:
Battery Life:
Weight:
Overall Dimensions:
Emission Designator: 180KF3E
Specifications subject to change without notice.
Front panel knob adjusts audio gain.
Rotary switches on bottom panel adjust
transmitter frequency.
80 Hz to 20 kHz, +/-1dB, -3 dB @ 70 Hz
(The audio is deliberately rolled off at 70 Hz
using a 12 dB/octave filter. This filter cannot
be disabled.)
SmartNR No Limiting w/Limiting
OFF 103.5 108.0
NORMAL 107.0 111.5
FULL 108.5 113.0
0.2% typical (400 Series mode)
2.5 mm Microjack (matches Switchcraft 850
Microplug)
Detachable, flexible galvanized steel
with SMA connector. (50 Ohm antenna port
also allows connection to test equipment.)
1.5 Volt AA lithium recommended
1.75 hours (alkaline); over 6 hours (lithium);
3.5 hours (2200 mAhr) NiMH
3.6 ozs. (102 grams) with lithium battery,
no antenna
3.03 x 2 x 0.69 inches (not including
microphone or antenna)
LECTROSONICS, INC.