# My LORA node viewed on SDR

**URL:** <https://www.thethingsnetwork.org/forum/t/my-lora-node-viewed-on-sdr/42128>\
**Category:** Uncategorized\
**Created:** [December 13, 2020, 8:50pm UTC](https://www.thethingsnetwork.org/forum/t/my-lora-node-viewed-on-sdr/42128 "2020-12-13T20:50:22Z")\
**Posts on this page:** 7\
**Page:** 1

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**Author:** ![jimg](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/jimg/32/45871_2.png) [@jimg](https://www.thethingsnetwork.org/forum/u/jimg)\
**Post date:** [December 13, 2020, 8:50pm UTC](https://www.thethingsnetwork.org/forum/t/my-lora-node-viewed-on-sdr/42128/1 "2020-12-13T20:50:22Z")

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The entry-level Software Defined Radios are so cheap, I decided to buy one and play with it. Check out this max-hold capture of my weather station:

![Image3](https://www.thethingsnetwork.org/forum/uploads/default/original/3X/b/0/b00a5a46260b6cf278945e2e7a984faf04d13433.jpeg)

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**Author:** ![kersing](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/kersing/32/44777_2.png) [@kersing](https://www.thethingsnetwork.org/forum/u/kersing)\
**Post date:** [December 13, 2020, 9:23pm UTC](https://www.thethingsnetwork.org/forum/t/my-lora-node-viewed-on-sdr/42128/2 "2020-12-13T21:23:03Z")

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From experience I know the waterfall view is interesting. If the SF is sufficiently high you can see the chirps .

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**Author:** ![jimg](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/jimg/32/45871_2.png) [@jimg](https://www.thethingsnetwork.org/forum/u/jimg)\
**Post date:** [December 14, 2020, 12:22am UTC](https://www.thethingsnetwork.org/forum/t/my-lora-node-viewed-on-sdr/42128/3 "2020-12-14T00:22:05Z")

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> [@kersing](#):
>
> I know the waterfall view is interesting

Cool. I will check that out.

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**Author:** ![jimg](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/jimg/32/45871_2.png) [@jimg](https://www.thethingsnetwork.org/forum/u/jimg)\
**Post date:** [December 14, 2020, 12:39am UTC](https://www.thethingsnetwork.org/forum/t/my-lora-node-viewed-on-sdr/42128/4 "2020-12-14T00:39:56Z")

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Here it is:

![Image5](https://www.thethingsnetwork.org/forum/uploads/default/original/3X/0/b/0bce52828104f58e61dd92e4c97ba85f9a629117.jpeg)

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**Author:** ![jimg](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/jimg/32/45871_2.png) [@jimg](https://www.thethingsnetwork.org/forum/u/jimg)\
**Post date:** [December 16, 2020, 12:26am UTC](https://www.thethingsnetwork.org/forum/t/my-lora-node-viewed-on-sdr/42128/5 "2020-12-16T00:26:00Z")

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Are these smaller signals likely to be from far away LORA nodes ? My Gateway does not register them.

![Image7](https://www.thethingsnetwork.org/forum/uploads/default/original/3X/b/6/b603f4d22fc67eccf37719bd65d578e54817d049.jpeg)

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**Author:** ![cslorabox](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/cslorabox/32/35697_2.png) [@cslorabox](https://www.thethingsnetwork.org/forum/u/cslorabox)\
**Post date:** [December 16, 2020, 3:35am UTC](https://www.thethingsnetwork.org/forum/t/my-lora-node-viewed-on-sdr/42128/6 "2020-12-16T03:35:15Z")

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You have too fast a data rate or not enough time resolution to see what’s interesting in a waterfall. In a situation where you can see detail, you’ll see the actual zig-zag “chirps” which encode the data.

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**Author:** ![jimg](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/jimg/32/45871_2.png) [@jimg](https://www.thethingsnetwork.org/forum/u/jimg)\
**Post date:** [December 16, 2020, 10:19pm UTC](https://www.thethingsnetwork.org/forum/t/my-lora-node-viewed-on-sdr/42128/7 "2020-12-16T22:19:44Z")

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I am not sure how to adjust the waterfall rate. The LORA signal comes and goes so fast.