AWR1642: The parameters realtion between Profile and Chirp

rongjiang liu

Expert 1275 points

Part Number: AWR1642

As to the picture above, the parameters realtion between Profile and Chirp.

For the parameter:

Profile Id=1

Start Fre(GHz)=76

Freq slope（MHz/us）=20

Idle time（us）=2

ADC Start time(us)=6.4

------------------------------

Profile Id=1

Start ChIrp of Cfg=0

End ChIrp of Cfg=3

Start Fre Var(MHz)=10

Freq slope Var（MHz/us）=0.1

Idle time Var（us）=0.2

ADC Start time Var(us)=0.3

-----------------------------------

What is the exact parameter (Start Freq/Freq slope/Idle time/ADC Start time) of chirp0~1?

over 7 years ago

0 rongjiang liu over 7 years ago

Expert 1275 points

0 Jitendra Gupta over 7 years ago

TI__Guru 70050 points

Hello,
Could you upload picture again, it doesn't visible here.

Regards,
Jitendra

0 rongjiang liu over 7 years ago in reply to Jitendra Gupta

Expert 1275 points

i have uploaded.
Regards.

0 rongjiang liu over 7 years ago in reply to Jitendra Gupta

Expert 1275 points

Hi,Jitendra.
have you senn my reply?

0 Kaushal Kukkar over 7 years ago in reply to rongjiang liu

TI__Expert 7215 points

Hi,

Chirp 0-3, will have the same values of chirp parameter as they belong to same profile and have same chirp configuration.

Start Freq: 76.01 (76GHz + 10MHz)
Freq slope: 20.1 (20MHz/us + 0.1MHz/us)
Idle time: 2.2 (2us + 0.2us)
ADC Start: 6.7 (6.4us + 0.3us)

Regards,
Kaushal

0 rongjiang liu over 7 years ago in reply to Kaushal Kukkar

Expert 1275 points

Thanks very very very much!
But i have to confirm my idea is wrong.
i thought before:
Chirp 0
Start Freq: 76.01 (76GHz + 10MHz)
Freq slope: 20.1 (20MHz/us + 0.1MHz/us)
Idle time: 2.2 (2us + 0.2us)
ADC Start: 6.7 (6.4us + 0.3us)
Chirp 1
Start Freq: 76.02 (76GHz + 10*2MHz)
Freq slope: 20.2(20MHz/us + 0.1*2MHz/us)
Idle time: 2.4(2us + 0.2*2us)
ADC Start: 7.0 (6.4us + 0.3*2us)
Chirp 2
Start Freq: 76.03(76GHz + 10*3MHz)
Freq slope: 20.3(20MHz/us + 0.1*3MHz/us)
Idle time: 2.6(2us + 0.2*3us)
ADC Start: 7.3(6.4us + 0.3*3us)
Chirp 3
Start Freq: 76.04(76GHz + 10*4MHz)
Freq slope: 20.4(20MHz/us + 0.1*4MHz/us)
Idle time: 2.8(2us + 0.2*4us)
ADC Start: 7.6(6.4us + 0.3*4us)

It is totally wrong, right?

0 Kaushal Kukkar over 7 years ago in reply to rongjiang liu

TI__Expert 7215 points

Yes your understanding is wrong. All chirps will have same value of chirp parameters as I indicated in my earlier response.

Regards,
Kaushal

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AWR1642: The parameters realtion between Profile and Chirp