Lectrosonics ALP690 Bruksanvisning
Lectrosonics
TV-antenn
ALP690
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ALP690
Active LPDA Antenna
INSTRUCTION MANUAL
Rio Rancho, NM, USA
www.lectrosonics.com
Fill in for your records:
Serial Number:
Purchase Date:
ALP690
LECTROSONICS, INC.2
Features and Functions
The ALP690 is a high performance LPDA (log periodic
dipole array) antenna with a built-in RF amplifier for
use with wireless microphone receivers on location or
studio production. The antenna design delivers +4 dBd
of passive gain in a directional pattern to extend oper-
ating range and suppress signals from the rear.
The antenna is formed with copper traces on a .133”
thick glass epoxy high-pressure thermoset plastic
laminate material with a durable finish. The skeletal
structure reduces wind loading in outdoor use.
RF gain, bandwidth and display brightness are adjust-
ed with a membrane switch keypad and LED display
on the control panel.
Active gain can be adjusted from +12dB to -6dB. Posi-
tive gain is used to compensate for long coaxial cable
runs between the antenna and a receiver or multicou-
pler. Negative gain can be used to offset the natural
pattern gain of +4dBd to achieve a level equivalent to a
dipole antenna, or in special cases where high power
transmitters are being used in close proximity.
When used as an active antenna, the filter bandwidth
is adjustable from 470 MHz at the lower end to either
608 or 700 MHz at the top end, to serve users’ needs
in various markets and locations.
The antenna is powered by DC bias inserted on the
coaxial cable connected to the 50 ohm BNC jack. This
power can be supplied by a Venue Series receiver, an
active multicoupler or an inline BIAS-T.
Power is provided by DC bias
on the output connector
The antenna will automatically switch to the passive
mode when no DC bias power is present on the BNC
connection.
Settings are made with a
keypad interface on the
control panel.
Active LPDA Antenna
Rio Rancho, NM 3
Reception Pattern
Vertical orientation provides a wide horizontal cover-
age pattern and deep nulls directly above and below
the antenna. Viewed from the side, the pattern is
weighted forward with significant rejection at the rear.
Viewed from above, the horizontal coverage pattern
extends across a broad angle.
Produktspecifikationer
| Varumärke: | Lectrosonics |
| Kategori: | TV-antenn |
| Modell: | ALP690 |
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