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Vortex PABM1 Quick Start Manual
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Vortex PABM1 Quick Start Manual

Passive airband monitor
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PABM1 Passive Airband Monitor
PLEASE READ THIS INSTRUCTION MANUAL
BEFORE USING THE PABM1!
The PABM1 Passive Air Band Monitor by Vortex Electronics is a non-interfering AM receiver for the radio
band used for air traffic control. It receives all nearby transmissions within the band used for voice
communications between civilian aircraft and air traffic control centers.
© 2021 Vortex Electronics. All rights reserved.
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Summary of Contents for Vortex PABM1

  • Page 1 PLEASE READ THIS INSTRUCTION MANUAL BEFORE USING THE PABM1! The PABM1 Passive Air Band Monitor by Vortex Electronics is a non-interfering AM receiver for the radio band used for air traffic control. It receives all nearby transmissions within the band used for voice communications between civilian aircraft and air traffic control centers.
  • Page 2 However, the PABM1 Passive Air Band Monitor directly detects nearby AM signals in the 118 to 137 MHz VHF (very-high-frequency) aircraft voice band without the use of internal oscillators, and thus cannot interfere with aircraft communications and navigation equipment.
  • Page 3 Signals from these oscillators that escape the receiver may interfere with communication and navigation signals. In contrast, a passive monitor does not contain any oscillators or other radio-frequency sources that may radiate interfering signals. © 2021 Vortex Electronics. All rights reserved.
  • Page 4 Signals from these oscillators that escape the receiver may interfere with communication and navigation signals. In contrast, the PABM1 Passive Air Band Monitor does not contain any oscillators or other radio-frequency sources that may radiate interfering signals. Signals picked up by the antenna are filtered within the airband and then directly demodulated to produce audio.
  • Page 5 131.550 MHz which is within the range of the PABM1 and so cannot be filtered. The short "beep" at the beginning of the message is the preamble of the ACARS message, and the rest of the burst, which sounds like loud radio static, is the actual data stream of the message.

  • Page 6: Phonetic Alphabet

    Next, connect a pair of stereo headphones to the jack labeled “headphones.” Do not force the plug so as not to unsolder the jack from the circuit board. Turn ON the PABM1 by sliding the power switch towards the ON position. The green LED indicator should turn on.
  • Page 7 IFR (INSTRUMENT FLIGHT RULES)- Rules for conducting instrument flight. Also used to indicate type of flight plan. MAYDAY− Distress signal. When repeated three times, it indicates imminent and grave danger and that immediate assistance is requested. © 2021 Vortex Electronics. All rights reserved.
  • Page 8 FAA (Federal Aviation Administration) has jurisdiction on electronic devices in use on board aircraft. The PABM1 Passive Air Band Monitor does not have an internal RF oscillator, and does not emit RF energy above 9 kHz, so it is exempt from FCC registration.

  • Page 9: Returns And Warranty

    6 Returns and Warranty Each PABM1 Passive Airband Monitor is inspected and tested before it is shipped. However, because of the nature of the device, it comes with no guarantee. No warranty is issued, and returns are not accepted.

  • Page 10: Disclaimer Of Liability

    OTHERWISE) SHALL NOT EXCEED FIFTY US DOLLARS ($50.00). THE FOREGOING LIMITATIONS WILL APPLY EVEN IF THE ABOVE STATED REMEDY FAILS OF ITS ESSENTIAL PURPOSE. Finally, Vortex Electronics is not responsible to the buyer, user, or third parties for any claim of special or consequential damages, in accordance to the previous disclaimer.