Does Heart Rate Dynamic Source Switching Work with a compatible ANT+ Chest Strap from another brand?

Unfortunately, Garmin keeps its source switching criteria secret. Therefore, if the question is whether to receive bad data from OHRS or not receive any data if the strap fails, I choose the second option and simply turn off this strange function altogether.

Hello, thanks, i will turn it off and will give a test, best

The wording similarities between what Garmin now calls 'Source Switching' - the old function of OHR taking over from a totally failing strap - and 'Dynamic Source Switching' - the new _extra_ function where OHR suppleants/tries to correct bad data from a strap, is unfortunate.

I have not installed the new update on my FR955, but if the option to turn off DYNAMIC Source Switching simply is called 'Source Switching', then do turn that off for anything else than a few modern Garmin straps. This to prevent, or at least try to cut off, an extra bug pathway...

There is a thread in the FR955 forum containing relevant information:

HR Dynamic Source Switching - what is the point?

https://forums.garmin.com/sports-fitness/running-multisport/f/forerunner-955-series/373025/hr-dynamic-source-switching---what-is-the-point

But if you just want a direct link to a Garmin support page - bad wording and all - here it is:

What is Heart Rate Dynamic Source Switching?

https://support.garmin.com/en-US/?faq=Nf8r6ApX4d9lX0G0flEsVA

Edit: Remembered that some people rather want straight facts than links to facts, so here are the pertinent words from Garmin (at this date):

"Switching sources based on the quality of the heart rate signal during an activity requires the use of a Garmin HRM-Fit, HRM-Pro, or HRM-Pro Plus heart rate monitor along with a watch from the compatible watch list below."

"The optical heart rate lights  will remain on with this feature enabled" - I have that "feature" disabled. But in activity my OHRS still flickers parallel to the connected external strap.  And i have a third manufacturer ANT+ chest strap. If my strap is not a plus-pro-mega a_little_bit_overpriced garmin strap, Source Switching should be disabled automatically, right? But it doesn't work like that. Just another immature innovation.

Where do you find the setting? 

Heart Rate Widget , Settings (Top Right Button)

Source Switching as a toggle option there.

Also via main menu (see link)

support.garmin.com/.../

Thanks, I found it. Didn't think about checking the widgets.

I disabled it, and then gone to run, and after analyze the fit file I see that there only one heart rate graphics, because heart rate and external heart rate are just the same value, so maybe the lights are on in the watch but the values getting is only from the external chest strap

I have immediatly turned off this feature "source switching" .

I dont even understand what this is.

A heart rate strap is ALWAYS more accurate as the garmin optical heart rate sensor.

The garmin optical heart rate sensor is OK during rest and sleep, but during training is absolutely inaccurate.

The garmin optical sensor is simply extremly weak quality.