Lectrosonics MM400b - Manual (Page 18)

MM400B
Specifications and Features
Operating frequencies:
Block 21 537.600 - 563.100
Block 22 563.200 - 588.700
Block 23 588.800 - 607.900 and 614.100 - 614.300
Block 24 614.400 - 639.900
Block 25 640.000 - 665.500
Block 26 665.600 - 691.100
Block 27 691.200 - 716.700
Block 28 716.800 - 742.300
Block 29 742.400 - 767.900
Frequency selection: 256 frequencies in 100 kHz steps
RF Power output: 100 mW (nominal)
Pilot tone: 25 to 32 kHz; 5 kHz deviation
(in 400 Series Mode)
Frequency stability: ± 0.002%
Deviation: ± 75 kHz max. (in 400 Series Mode)
Spurious radiation: 60 dB below carrier
Equivalent input noise: –118 dBV, A-weighted
Input level: Nominal 2 mV to 300 mV, before limiting.
Greater than 1.5V maximum, with limiting.
Input impedance: 2 kOhm
Input limiter: Soft limiter, >30 dB range
Gain control range: 43 dB; semi-log rotary control
Modulation indicators: Dual bicolor LEDs indicate modulation of
–20, -10, 0, +10 dB referenced to full
modulation.
Low frequency roll-off: –12 dB/octave; 70 Hz
Controls: Front panel knob adjusts audio gain.
Rotary switches on bottom panel adjust
transmitter frequency.
Audio Frequency Response: 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.)
Signal to Noise Ratio (dB): SmartNR No Limiting w/Limiting
(overall system, 400 Series mode) OFF 103.5 108.0
Note: The dual envelope “soft” NORMAL 107.0 111.5
limiter provides exceptionally good
handling of transients using variable
FULL 108.5 113.0
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: 0.2% typical (400 Series mode)
Audio Input Jack: 2.5 mm Microjack (matches Switchcraft 850
Microplug)
Antenna: Detachable, flexible galvanized steel
with SMA connector. (50 Ohm antenna port
also allows connection to test equipment.)
Battery: 1.5 Volt AA lithium recommended
Battery Life: 1.75 hours (alkaline); over 6 hours (lithium);
3.5 hours (2200 mAhr) NiMH
Weight: 3.6 ozs. (102 grams) with lithium battery,
no antenna
Overall Dimensions: 3.03 x 2 x 0.69 inches (not including
microphone or antenna)
Emission Designator: 180KF3E
Specifications subject to change without notice.
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.
LECTROSONICS, INC. 18