Lectrosonics SMQV/X handleiding
Handleiding
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High Power Output and Long Battery Life
Variable power provides the choice of maximum power
output for extended operating range and interference
suppression, or lower power output for extended bat-
tery life when operating in less demanding RF condi-
tions.
Adjustable Low Frequency Roll-o
The low frequency roll-off can be set for 3 dB down
points at 35, 50, 70, 100, 120 or 150 Hz to control sub-
sonic and very low frequency audio content.
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
DSP-Based Pilot Tone & Compatibility
The DSP generated pilot tone eliminates the need for
fragile crystals and allows a different pilot tone fre-
quency for each of the carrier frequencies in the tuning
range of the wireless system. Individual pilot tones
significantly reduce squelch problems in multichannel
systems where a pilot tone signal can appear in the
wrong receiver via intermodulation products.
Input Limiter
A DSP-controlled analog audio limiter is employed
before the analog-to-digital converter. The limiter
has a range of more than 30 dB for excellent over-
load protection. A dual release envelope makes the
limiter acoustically transparent while maintaining
low distortion. The limiter recovers quickly from brief
transients, so that its action is hidden from the lis-
tener, but recovers slowly from sustained high levels,
to keep audio distortion low and preserve short term
dynamic changes.
The bicolor LEDs accurately indicate limiter activity
to assist in setting the input gain for optimal signal to
noise ratio and dynamic range.
Circulator/Isolator
The transmitter RF output circuit includes a special-
ized RF device called a “circulator/isolator” or simply
“isolator” using a magnetically polarized ferrite to
allow RF signals to pass through to the antenna, but
block them from coming backward into the transmitter
output section.
This greatly reduces RF intermodulation produced in
the transmitter output stages when multiple units are
used in close proximity (a few feet apart). The isolator
also helps protect the output stage from electrostatic
shock delivered to the antenna. Isolators are com-
mon in broadcast and commercial applications, but
because of their high cost it is unusual to find them in
wireless microphone systems.
GORE-TEX
®
Vent
In special circumstances it is possible for moisture
to be pulled into the housing when a unit is moved
from a warm, damp operating environment, turned
off and stored in a cool place. As the warm air inside
the unit cools a vacuum is created, pulling air in past
the exterior of the housing, bringing moisture with it.
SMV Series Transmitters Block Diagram
Variable 1.8 - 4v
+6V
+5V
5V
Regulator
X1
11.289 MHz
X2
12.000 MHz
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Productinformatie
| Merk | Lectrosonics |
| Model | SMQV/X |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 880 MB |
