CC1310: Frequency Resolution of the Modulator

Harikrishnan R S

Part Number: CC1310

Hi,

I haven't seen any data regarding the frequency resolution of the Modulator. What is the frequency resolution of CC1310 in the 400 -410 MHz frequency band ?

Thank you in advance for any help you provide.

over 5 years ago

0 TER over 5 years ago

TI__Guru**** 317180 points

Do you mean the synth resolution in Hz, in other words the smallest output frequency step it's possible to program?

0 Harikrishnan R S over 5 years ago in reply to TER

Expert 1670 points

Sorry for the delay.

Yes, I want to know the smallest output frequency step size in the band 400 - 410 MHz

0 TER over 5 years ago in reply to Harikrishnan R S

TI__Guru**** 317180 points

326 Hz

0 Harikrishnan R S over 5 years ago in reply to TER

Expert 1670 points

Thank you TER,
Thanks for the reply.

How is the frequency resolution calculated ?

0 TER over 5 years ago in reply to Harikrishnan R S

TI__Guru**** 317180 points

(FREF/2^11)/(LODIV/2)

Where FREF is 4 MHz and lodiv can be found from SmartRF Studio for the band you are operating in.

0 Harikrishnan R S over 5 years ago in reply to TER

Expert 1670 points

Thank you TER,
Thanks for the reply.

But where did that 4 MHz come from ?

0 TER over 5 years ago in reply to Harikrishnan R S

TI__Guru**** 317180 points

It's the value that the modem team has found gives the best result. Regard it as a constant.

0 Harikrishnan R S over 5 years ago in reply to TER

Expert 1670 points

Thank you TER,
Thanks for the reply.

Is F_REF a constant throughout the entire bands of operation in CC1310 or does that change with frequency bands ?

0 TER over 5 years ago in reply to Harikrishnan R S

TI__Guru**** 317180 points

Not sure which value that is used for 2.4 GHz but for sub 1-GHz frequencies I have only seen 4 MHz been used.

0 Harikrishnan R S over 5 years ago in reply to TER

Expert 1670 points

Thank You TER,
Thanks for the reply.

Sub-1 GHz

Sub-1 GHz forum

CC1310: Frequency Resolution of the Modulator