Pulse won't find analog?

- For interference with *transmission* I've never seen any tests on that (and my brief experiments haven't shown anything).

All I can say on this is that
a) this guy said he'd seen it happen repeatedly, but he mentioned that it does not always happen with all pairs of beacons/phones/radios - it is a squirrelly thing.
b) we saw a demonstration of this one morning when we were doing the daily "is everyone's beacon transmitting" test when one of the guests was carrying one of the group radios for the day and had it near his beacon (I think the radio was in a pouch on his shoulder strap) - he moved the radio to his pack lid and bingo, the "tester" picked up his beacon signal.
YMMV, but this was enough to leave me thinking it's worth erring on the cautious side on this front.

Did he have a Pieps DSP? If so, the switch *looks* mechanical but is actually magnetic, so the magnets in many radios (as well as in some clothing items) can temporarily switch the beacon out of Transmit.

I don't recall anyone in the group having a Pieps when we did the "get acquainted with everyone's beacons" at the start of the trip. There were Ortovoxs, Mammuts, Trackers, and maybe one other, but I recall thinking to myself "interesting that in the olden days we'd see mostly Pieps and Ortovox, but now there are no Pieps and just a few Ortovoxs."

My Pieps DSP gets confused with analog signals (tested with my old M2). Basically the processor starts showing multiple burials when you get close to a transmitting analog beacon. IIRC, the firmware version makes a difference, but this is certainly a known issue.

Since most people are on digital beacons now, I only have to worry about it when I loan a friend my spare beacon. Generally I give them the Pieps and I take the M2 since overall, the less-experienced person is going to do much better with a digital beacon.

Practice, practice, practice with your partners, even if it's 30sec in the parking lot at the start of a tour!

My Pieps DSP gets confused with analog signals (tested with my old M2).

I though all beacons transmit an analog signal. ???

My Pieps DSP gets confused with analog signals (tested with my old M2).  Basically the processor starts showing multiple burials when you get close to a transmitting analog beacon.  IIRC, the firmware version makes a difference, but this is certainly a known issue.

While the point was made in the above post, all beacon signals are analog. Radio waves are radio waves - it's the quantization of them on the receiving end that is giving you issues.

Before we blame these issues on frequency drift, which happens to older beacons (most of which happen to be analog - digital beacons are new to the scene and over time their transmitted frequencies can drift, too), can we make sure that it's not related to external radio and/or EM interference? I know my cell phone messes with my beacon (an original Tracker) when it's in Search mode. Result: I turn my phone and other electronic devices OFF while in the backcountry. You'd be surprised at how much influence something like a GoPro can have on the signals near a beacon. You also will only notice it when in search mode, but should the beacon be buried with something like a cell phone it could be much harder to find the buried beacon.

So, before we proceed, can we ensure that the empirical data being collected here is done according to the scientific method with as few independent variables as possible? That is, can you confirm that the only electronic devices remotely in range were the transmitting analog beacon and the digital receiving beacon? If not, it's back to the drawing board.