LMX2492EVM: LMX2492EVM ramp generation issue

Thomas ASNI

Part Number: LMX2492EVM

Dear team,

I would like to generate a certain number of ramps using the TRIG1 signal with the following configuration:

Ramp from 13.10 GHz to 13.30 GHz in 300 µs
The ramp is triggered by the TRIG1 pin
Ramp 1 triggers a signal on TRIG2 (Flag0)
The sequence should stop after 10 ramps until the TRIG1 signal is activated again

Could you please check my configuration, as I am only getting a single ramp (see screenshots)?

Thanks

0 Noel Fung 4 months ago

Hi There,

Like this?

0 Thomas ASNI 4 months ago in reply to Noel Fung

Hi Noel,

Yes. Do you have a configuration please?

Thanks.

0 Noel Fung 4 months ago in reply to Thomas ASNI

Hi Thomas,

Try this:

The actual ramp is:

After finishing once sequence, set TRIG1 = 0, set RAMP_EN = 0.

0 Thomas ASNI 3 months ago in reply to Noel Fung

Hello Noël,

I will have access to the laboratory on Tuesday and will test the configuration you provided.

In the meantime:

Could you add the TRIG1 and RAMP_EN signals to the graph (hand-drawn) so I can better understand?
Could you provide a configuration where the frequency returns to its initial state at the end of the tenth ramp?

Thanks.

0 Noel Fung 3 months ago in reply to Thomas ASNI

HI Thomas,

At the end of the ramp, Ramp Count is completed, the device set RAMP_EN = 0 automatically, it seems that I have no control to the ending behavior.

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