# Obtain hidden information from blocks

**URL:** <https://www.ruby-forum.com/t/obtain-hidden-information-from-blocks/252635>\
**Category:** GNU Radio\
**Created:** [June 30, 2019, 9:33am UTC](https://www.ruby-forum.com/t/obtain-hidden-information-from-blocks/252635 "2019-06-30T09:33:36Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Dyla2n](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/d/3da27b/32.png) [@Dyla2n](https://www.ruby-forum.com/u/Dyla2n)\
**Post date:** [June 30, 2019, 9:33am UTC](https://www.ruby-forum.com/t/obtain-hidden-information-from-blocks/252635/1 "2019-06-30T09:33:36Z")

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Hello,

I am using GNURadio and I would like to obtain different pieces of information that blocks have. For example, the “PLL Carrier Tracking” is a block that will center on the carrier frequency. In GRC I cannot obtain this found carrier frequency from the block, that is why I am asking how I could obtain this one. Do I have to change the python code of this block? How could I do that?

Thank you,  
Dylan