LMX2492EVM: How to configure to output a chirp 3.0 - 3.5GHz length 6ms

ehud zorea

Intellectual 290 points

Part Number: LMX2492EVM
Other Parts Discussed in Thread: TICSPRO-SW, LMX2572

How to configure to output a chirp 3.0 - 3.5GHz length 6ms via LMX2492EVM via the TICSPRO SW

much thanks.

Ehud.

over 3 years ago

0 Kia Rahbar over 3 years ago

TI__Expert 8585 points

Hello Ehud,

Please reference this document for more information on programming chirp: Programming Chirp Parameters

The ramping timing calculator in the mmWave Studio tool will also provide you the right timing parameter value recommendations. This software is located here: mmWave Studio Tool

Regards,

Kia Rahbar

0 ehud zorea over 3 years ago in reply to Kia Rahbar

Intellectual 290 points

I want to know if LMX2492EVM is technically capable of generating a sweep in the frequency of 3GHz to 3.5GHz.

0 Noel Fung over 3 years ago in reply to ehud zorea

TI__Guru* 81400 points

Hi Ehud,

Yes, it can support frequency sweep between these frequencies but the phase detector frequency has to be around 20MHz in order to meet the sweep time requirement.

0 ehud zorea over 3 years ago in reply to Noel Fung

Intellectual 290 points

I emphasize that I use the evaluation board: LMX2492EVM, it has a VCO of 9.4-10.8GHz.

Can this EVM be configured to output 3-3.5GHz in spite of its VCO frequencies?

if so, how should it be configured via the TICSPRO-SW?

Thank you,

Ehud.

0 Noel Fung over 3 years ago in reply to ehud zorea

TI__Guru* 81400 points

Hi Ehud,

First of all, you have to replace the on-board 10GHz VCO with a 3-3.5GHz VCO.

Then please follow EVM user's guide's examples (Section 3.2) to setup the sweep.

0 ehud zorea over 3 years ago in reply to Noel Fung

Intellectual 290 points

Noel Hi

much thanks.

can you please suggest a VCO which is pin-compatible which covers that frequency,

thanks again

Ehud

0 Kia Rahbar over 3 years ago in reply to ehud zorea

TI__Expert 8585 points

Hello Ehud,

TI does not supply VCO only devices.

A possible replacement is using the LMX2572. The LMX2572 supports the ramp and chirp functions and has a VCO with a frequency range of 3.2 GHz to 6.4 GHz.

Regards,

Kia Rahbar

0 Noel Fung over 3 years ago in reply to Kia Rahbar

TI__Guru* 81400 points

Hi Ehud,

you may also try MAOC-009260, which covers 6.1G to 7GHz and is pin compatible with the one we used in the EVM.

Use the Div/2 output of the VCO, you should be able to get the frequency range you want.

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LMX2492EVM: How to configure to output a chirp 3.0 - 3.5GHz length 6ms