Personal Locator Beacon transmits on emergency distress frequency 121.5 MHz (Guard) ACR PLB-375
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- čas přidán 16. 04. 2023
- ACR PLB-375 (#2880) self test. Beacon transmits GPS coordinates for general location and also transmits on 121.5 Mhz (AM aviation band) for close range tracking.
121.5 MHZ TRANSMITTER:
Frequency: 121.5 MHz
Tolerance: ±50 ppm (Pulse-Position Modulation)
Output Power: greater than 25mW PEP (typical 63mW)
Morse Code “P” ID: Every 50 seconds(approx.) (U.S. Protocol)
MODULATION
Type: AM (3K20A3N)
Sweep Range: 500 to 1600 Hz
Sweep Rate: 4 Hz
Duty Cycle: 33.3%
Morse P: AM (2K00A2A)
ANTENNA
Frequency: 406.037 & 121.5 MHz
Polarization: Vertical
VSWR: Less than 1.5:1
Finally , good information on how to test this unit and what to expect a good PLB test to show. I misplaced the manual that went came with my ResQLink The people at ARC were no help at all returning a email. Thank you for your help. Alan
Very nice. These are great beacons.
Why would you want this thing where more modern GPS based satellite options are available?
The ACR PLB is GPS based. The 121.5MHz is for close in search. As far as I know all the ACR PLBs include the 121.5 function.
@@danpass12 ah! I get it makes sense then.. 121.500 is the back up
@@OldCBnGuns I doubt it's a backup. Probably for ADF.
PLBs are also free of subscription fees. They're more affordable than satellite messengers and they have a better satellite network.
I’ve had mine for 8 years. No fee unless I want to message someone.