Vector Signal Generator VSG60A

[Val]

Hello! Can I generate LoRa signal with generator VSG60A?
If yes, what instruments should I use?
I need to transmit signal according LoRa modulation with some test pattern to check sensitivity of my receiver.
Regards, Val

[Andrew]

Val,

If you have the waveform as a baseband I/Q file, or the ability to create a LoRa waveform with a tool like MATLAB, and the sample rate of the file doesn’t exceed 50MS/s, then yes you can use the VSG60 to transmit this waveform using the ARB output mode. Our software does not have native LoRa waveform creation capability, you would have to provide your own waveform.

[Val]

Hello Andrew,
Thank you for the reply I will check your suggestion.

Regards, Val

• This reply was modified 2 years, 7 months ago by Val.

[LColin]

Hello Andrew,

Would the same procedure apply to generate a pi/4-QPSK modulation signal to create a VDES packet?
I am asking this because I saw pi/4-QPSK is not one of the pre-loaded modulation types available.

Regards,
Luciano

[Andrew]

Luciano,

In the digital mod output mode we support pi/4 DQPSK generation, is this what you’re looking for?

[LColin]

Hello again,

No, I am looking for pi/4-QPSK.
Is there a way to create it manually?

Regards,
Luciano

[Andrew]

The digital mod mode also supports custom constellation creation with the “Define Modulation” button. Then you just select “custom” on the modulation type. You can save/load your created constellation or if you save a preset it should be saved/loaded as part of the preset.

Let me know if this doesn’t provide enough flexibility for your use case.

[LColin]

Hello Andrew,

Flexibility is great! I just wanted to confirm I can create the modulation I need.
In case I have problems creating my first custom modulation, do you provide personalized support on that matter?

Regards,
Luciano

[Andrew]

Sure, email any questions to

aj@signalhound.com

[Author]

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