Lectrosonics MM400a - Manual - Manual (Page 13)

Frequency Agile UHF Miniature Belt-Pack Transmitter
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: 70 Hz to 20 kHz, +/-1dB (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):
(overall system, 400 Series mode)
SmartNR No Limiting W/ Limiting
OFF 103.5 108.5
NORMAL 107.0 111.5
FULL 108.5 113.0
(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)
Total Harmonic Distortion: 0.2% typical (400 Series mode)
Audio Input Jack: 2.5 mm Microjack (matches Switchcraft 850 Microplug)
Antenna: Detachable, flexible bronze wire supplied. 50 Ohm port allows
connection to test equipment.
Battery: 1.5 Volt AA lithium recommended
Battery Life: 2 hours (alkaline); 4.5 hours (lithium); NiMH: 3.5 hours
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.
Rio Rancho, NM – USA 13