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Lectrosonics ALP690 Active/Passive UHF LPDA Antenna (470 to 608/700 MHz)
• Broad bandwidth for multi-channel systems • Directional pattern with 4 dBd RF gain
• Built-in RF amplifier with adjustable gain for offsetting cable loss
• Keypad and membrane switches with LED readout for quick setup
• Automatically switches to passive mode when no DC power is present on the coaxial cable
• Durable finish and weather tolerant construction for indoor/outdoor use
• Skeletal structure reduces wind loading
• Versatile mounting options with the supplied mount and optional mounting adapter kit
The ALP690 is a high performance LPDA (log periodic dipole array) antenna with a built-in RF amplifier for use with wireless microphone receivers in location or studio production. The design delivers +4 dBd of gain in a directional pattern to extend operating range, and
the amplifier applies gain to overcome loss in long coaxial cable runs. 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.
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.
Pattern Gain: +7 dBi (isotropic)
+4 dBd (over dipole)
Passband: Passive: 450 - 850 MHz
Active: 470 - 608 or 470 - 700 MHz, selectable
RF Amplifier Gain Range: -6 to +12 dB in 1 dB steps
Third Order Intercept: +27 dBm @ input; +41 dBm output
Weight: 13 ozs.; 355 grams
Power Requirements: DC bias on center pin of coaxial cable;
8V to 16V DC; 1.5 W max.; polarity protected