HERTZ_TO_PPM_MULTIPLIER Channel 4 and 7

Wireless Connectivity Ultra-Wideband
1

Hello!

I have stumbled across the HERTZ_TO_PPM_MULTIPLIER macros in deca_device_api.h and been wondering why the ones for channel 4 and 7 are missing? Which one should be used instead when operating these channels?

EDIT: I suspect it might have something to do with the channel’s bandwith being different for channel 4 and 7?

Thanks for your help,
Julian

2

Hi,
We have calculated the numbers for channels, 1,2,3 & 5 , while only used 2,3&5 in the code
Please have a look at the IC user manual (version 2.13) Sub-Register 0x27:28 – DRX_CAR_INT in section 7.2.40.11 (page 149) for calculating 4 & 7
/Leo

3

Ah I see, thank you for your help!
Is it not recommended using channels 1,4&7?

best regards,
Julian

4

The channel 4, and 7 has the same center frequencies as channel 2, respectively channel 5 . So it should work to use the same constant as them. (4,2), (7,5)

The only scaling in the equation seem to be because of the center frequency, and not bandwith (?)

5

Hi,

I have tags and want to classified them with setting of the different frequency in same channel. Now i have been using channel 2.

thank you,