# How to improve improve Gain of signal?

**URL:** <https://discourse.myriadrf.org/t/how-to-improve-improve-gain-of-signal/1888>\
**Category:** LimeSDR\
**Created:** [22 October 2017 11:28 UTC](https://discourse.myriadrf.org/t/how-to-improve-improve-gain-of-signal/1888 "2017-10-22T11:28:23Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![random](https://avatars.discourse-cdn.com/v4/letter/r/57b2e6/32.png) [@random](https://discourse.myriadrf.org/u/random)\
**Post date:** [22 October 2017 11:28 UTC](https://discourse.myriadrf.org/t/how-to-improve-improve-gain-of-signal/1888/1 "2017-10-22T11:28:23Z")

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Dear All  
I dualRxTx example i transmit 2.1ghz signal and also modify the code for gain i.e i changed ‘LMS\_SetNormalizedGain(device, LMS\_CH\_TX, 0, 0.4)’. from0.4 to 1.0 and also used TX1\_1 port gain increased from -37dbm to -20.1dbm which is quite impressive now i want to improve more gain value what else should i change in code to increase the gain. I know there are other option like use LNA, Power amplifier but i want to increase gain value from code

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**Author:** ![IgnasJ](https://avatars.discourse-cdn.com/v4/letter/i/278dde/32.png) [@IgnasJ](https://discourse.myriadrf.org/u/IgnasJ)\
**Post date:** [23 October 2017 11:53 UTC](https://discourse.myriadrf.org/t/how-to-improve-improve-gain-of-signal/1888/2 "2017-10-23T11:53:25Z")

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Hi,  
Do you see same signal level on both channels (TX1\_1 and TX2\_1)? Going from gain setting 0.4 to 1.0 should give you larger increase in gain (~32-35 dB). I tried running dualRxTx on my setup and at 0.4 signal level on spectrum analyzer is about -40 dBm while at 1.0 it is about -6 dBm.  
There are no other options that could significantly increase gain.

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**Author:** ![random](https://avatars.discourse-cdn.com/v4/letter/r/57b2e6/32.png) [@random](https://discourse.myriadrf.org/u/random)\
**Post date:** [24 October 2017 03:21 UTC](https://discourse.myriadrf.org/t/how-to-improve-improve-gain-of-signal/1888/3 "2017-10-24T03:21:13Z")

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I have changed frequency from 1ghz to 2ghz at 2ghz frequency and at 0.4 gain output frequency gain is -37db and when changed gain to 1.0 then gain is -20db