More Frequencies Found While In Max 40

[Mark Gillespie]

 

[raziel900]

from your videos we can understand that the deus 2 in multifrequency uses two main frequencies, and that the various programs setting the same frequencies are all the same... except for some like general and sens ft...bhaa

[JCR]

Interesting. Thanks for the videos.

[Mirda]

On 8/18/2024 at 9:26 PM, raziel900 said:

from your videos we can understand that the deus 2 in multifrequency uses two main frequencies, and that the various programs setting the same frequencies are all the same... except for some like general and sens ft...bhaa

It transmits 2 frequencies. More important is receiving end - it can work also with harmonic frequencies, which are integer multiplications of the base frequency. I think there is some serious magic behind this...

These videos are very interesting.

[Chase Goldman]

Ok what is very interesting here is that the ratio of 7.5 to 38 khz for FMF 40 khz Max is roughly 5:1 vs. 14 max and 24 max which have frequency ratios of 3:1 each for the transmitted fundamentals.  That means the fundamental transmit harmonics for 40 Max are different than those of the the other two FMF Max settings.  So I was wrong in what I predicted for the 40 khz FMF Max in my previous post on Mark's analysis of the 24 khz FMF Max settings.  In summary:

General, Sensitive, Sensitive FT, Fast, and Beach Sensitive -> Default FMF Max = 40 khz (Note: kind of surprised that XP chose 40khz as the default for General) (Fundamentals at ~7.5 khz and 38 khz, ratio 5:1)

Park, Relic, and Beach -> Default FMF Max = 24 khz (fundamentals at ~7.5 and 22.8 khz, ratio 3:1)

Deep HC and Dive -> Default FMF Max = 14 khz (fundamentals at ~4.4 and 13.5 khz, ratio 3:1)

As you can see, this is interesting because for FMF Max of 40, XP held the lower frequency component at 7.5 khz (just like FMF Max of 24) and simply raised the upper component to 38 khz.  Why did they do this?  Who knows.  Perhaps someone like @Geotech who understands the pros and cons to different approaches to simultaneous multi frequency implementation can speculate better.  Anyway, interesting finding.

@Mark Gillespie - hoping you post results of what you found out when measuring the base frequencies for Mono operation.