Lectrosonics ALP690 Active/Passive UHF LPDA Antenna (470 to 608/700 MHz)

Lectrosonics ALP690 Active/Passive UHF LPDA Antenna (470 to 608/700 MHz)

Lectrosonics ALP690 Active/Passive UHF LPDA Antenna (470 to 608/700 MHz)

B&H # LEALP690 MFR # ALP690
Lectrosonics ALP690 Active/Passive UHF LPDA Antenna (470 to 608/700 MHz)

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Product Highlights

  • Skeletal Frame Reduces Wind Load
  • Wide UHF Range for US & Abroad
  • Membrane Control Pad with LED
  • Built-In RF Amp with -6 to +12 dB Gain
  • Passive Gain: +4 dB
  • Vertical or Horizontal Mounting
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Lectrosonics ALP690 overview

  • 1Description

The Lectrosonics ALP690 is a high-performance active/passive UHF LPDA (Log Periodic Dipole Array) antenna with a built-in RF amplifier to extend the operating range of wireless microphone receivers or base station transmitters in location or studio productions. The unit delivers +4 dBd of passive gain, while the built-in RF amplifier can be engaged to supply -6 to +12 dB of gain in adjustable 1-dB steps for overcoming signal loss in long coaxial cable runs.

The antenna is powered via 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 device. The unit automatically switches to passive mode when no DC power is present on the coaxial cable, allowing you to use it not only for receivers but for IFB or IEM transmission applications as well.

A membrane switch keypad and LED readout on the control panel allow for quickly adjusting RF amplifier gain, filter bandwidth, and display brightness—convenient when working in low-light environments. As an active antenna, the ALP690 operates with a broad bandwidth to accommodate multi-channel systems. The filter bandwidth is adjustable from 470 MHz at the lower end to either 608 or 700 MHz at the top end for use in the US market or abroad. 

The skeletal frame reduces wind load and is constructed with copper traces on a .133" thick glass epoxy high-pressure thermoset plastic laminate material with a durable finish. The ALP690 can be mounted horizontally or vertically with the supplied mount or an optional mounting adapter kit (sold separately).

Features and Functions
  • Skeletal frame reduces wind load
  • Passive directional gain of +4 dB
  • Active gain from -6 to +12 dB, adjustable in 1-dB steps
  • Negative gain for offset and close proximity transmitters
  • Adjustable bandwidth from 470 MHz to 608 or 700 MHz for world-wide use with multi-channel systems
  • Control panel with membrane keypad and LED for low-light operation
  • Requires 8 to 16 VDC bias power from Venue Series receiver, active coupler, or inline BIAS-T
  • Vertical or horizontal mounting
In the Box
Lectrosonics ALP690 Active/Passive UHF LPDA Antenna (470 to 608/700 MHz)
  • Limited 1-Year Warranty
  • Table of Contents
    • 1Description

    Lectrosonics ALP690 specs

    Gain Isotropic: +7 dBi
    Over Dipole: +4 dBd
    Bandwidth Passive: 450 - 850 MHz
    Active: 470 - 608 or 470 to 700 MHz (Selectable)
    RF Gain Range: -6 to +12 dB in 1-dB Steps
    Third Order Intercept +27 dBm @ Input; +41 dBm Output
    Power Requirements DC Bias on Center pin of Coaxial Cable
    8 to 16 VDC
    1.5 W Max
    Polarity Protected
    Weight 13 oz / 355 g
    Dimensions Not Specified by Manufacturer

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