# Re: mirrored spectrum around tuning freq **URL:** \ **Category:** GNU Radio\ **Created:** [August 12, 2015, 6:23pm UTC](https://www.ruby-forum.com/t/re-mirrored-spectrum-around-tuning-freq/242981 "2015-08-12T18:23:04Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![Rafa\_F](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/r/958977/32.png) [@Rafa\_F](https://www.ruby-forum.com/u/Rafa_F)\ **Post date:** [August 12, 2015, 6:23pm UTC](https://www.ruby-forum.com/t/re-mirrored-spectrum-around-tuning-freq/242981/1 "2015-08-12T18:23:04Z")
Hi Marcus, in the picture you see the power output of the signal generator is -30 dBm. Changing it to -90 dBm does not produce any change in the received signal except a (obvious) lower level. There is not other amplifier between signal generator output and N200 input. Luca – Ing. Luca P. LOG.IN S.r.l Via Aurelia, 714 00165 ROMA - ITALY Phone: +39-06-66417044 Fax: +39-06-66411155 Web: www.log-in.it