Specifications and features – Lectrosonics SMDa User Manual
Page 21
Super-Minature Belt Pack Transmitters
Specifications and Features
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
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 usage varies by country)
Frequency range:
256 frequencies in 100 kHz steps
for one 25.5 MHz wide block
Channel Spacing:
100 kHz
Frequency selection:
Control panel mounted membrane switches
RF Power output:
SMDa: 100 mW (nominal)
Compatibility Modes (6)
Digital Hybrid Wireless™ (400 Series),
and IFB
Pilot tone:
25 to 32 kHz; 3 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:
–125 dBV, A-weighted
Input level:
If set for dynamic mic:
0.5 mV to 50 mV before limiting.
Greater than 1 V with limiting.
If set for 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 50 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:
Fixed 5 V at up to 5 mA
Selectable 2 V or 4 V servo bias for any
electret lavaliere.
Gain control range:
40 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:
+6
+3
0dB
-3
-6
-9
-12
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
Adjustable from 35 to 150 Hz.
Line in
Mic in 150 Hz
Roll-off
Mic in 35 Hz
Roll-off
30
100
1kHz
10k
20k
35 Hz to 20 kHz, +/-1 dB (The low frequency
roll-off is adjustable - see graph above)
SmartNR
No Limiting
w/Limiting
OFF
103.5
108.0
NORMAL
107.0
111.5
FULL
108.5
113.0
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:
Switchcraft 5-pin locking (TA5F)
Antenna: Flexible, unbreakable steel cable.
Batteries:
1.5 Volt AA lithium or rechargeable
NiMH recommended
Battery Life:
SMDa: 5.75 hours (alkaline); 14.25 hours (lithium),
8.5 hours with 2500mAh NiMH
Weight:
RM: 2.3 oz.. (65.8 grams) with lithium battery
SMDa: 3.7 oz.. (105 grams) with lithium batteries
Overall Dimensions:
RM: 2.3 x 1.8 x 0.64 inches
(not including microphone/lanyard)
58 x 46 x 16 mm
(not including microphone/lanyard)
SMDa: 2.3 x 2.4 x 0.64 inches
(not including microphone)
58 x 60 x 16 mm
(not including microphone)
Emission Designator: 180KF3E
Specifications subject to change without notice.
Rio Rancho, NM
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