# GNU radio recording specific interval

**URL:** <https://www.ruby-forum.com/t/gnu-radio-recording-specific-interval/261688>\
**Category:** GNU Radio\
**Created:** [August 10, 2021, 1:09pm UTC](https://www.ruby-forum.com/t/gnu-radio-recording-specific-interval/261688 "2021-08-10T13:09:22Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![DSP](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/e274bd/32.png) [@DSP](https://www.ruby-forum.com/u/DSP)\
**Post date:** [August 10, 2021, 1:09pm UTC](https://www.ruby-forum.com/t/gnu-radio-recording-specific-interval/261688/1 "2021-08-10T13:09:22Z")

</div>

Hi, i just started struggle with GNU radio with using adalm-pluto. I aim to record the 2MHz interval in FM broadcast. I tried to below flowdiagram but when i converted the output of the file sink to wav file with sox and opened in SDR#, it just shows the -19kHz and +19kHz on selected frequency(like 87.5MHz,88,4 MHz, etc…). I want to record at 2MHz interval. I mean if beginning of the frequency is 87.5 MHz, I want to record whole radios between 87.5 MHz and 89.5 MHz. Is that possible in GNU radio? Thanks for help.

 ![Screenshot from 2021-08-10 16-01-13](https://www.ruby-forum.com/uploads/default/original/2X/9/93a6619078567e80b754352cfeb78a89c6d459a0.png)