Linear FT-1

The Model FT-1 is a Radio Interference Field Tester is designed for testing the RF environment around 318 MHz. It will decode any Megacode formatted RF data transmission and then give a short ”Beep” signal from the loudspeaker. Ambient RF noise or possible interference can be monitored. A steady hissing noise is normally heard. This is the background noise of the radio. Any steady pulsing, low frequency buzzing or even voice traffic indicates an interfering signal that may reduce the maximum range of the system. In most cases the effects of these interfering signals can be reduced or eliminated, but the techniques vary due to type of installation and antennas.

Order number: LDR00001


  • Tests for RF interference on MegaCode and AllStar based access control panels, receivers, and garage door operators
  • Compact and lightweight with battery save feature
  • Built-in speaker lets user hear what receiver hears
  • Special tone simplifies transmitter testing
  • Visual LED indication to confirm interference
  • Frequency: Wide band, 318 MHz center frequency
  • Power: 9-volt battery
  • Dimensions: 2.5″ W x 5.75″ H x 1.25″ D

Models compatible with the FT-1

  • LDO33 : 1/3 HP Standard Single Lamp Garage Door Operator
  • LDO50 : 1/2 HP Deluxe Single Lamp Garage Door Operator
  • LSO50 : 1/2 HP Deluxe Dual-Lamp Garage Door Operator
  • LCO75 : 3/4 HP Deluxe Dual Lamp Garage Door Operator
  • LDCO800 : 800 Newton DC Powered Garage Door Operator