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<?xml-stylesheet type="text/xsl" href="https://devzone.nordicsemi.com/cfs-file/__key/system/syndication/rss.xsl" media="screen"?><rss version="2.0" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/" xmlns:wfw="http://wellformedweb.org/CommentAPI/" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Frequency offset in %XRFTEST CW testing</title><link>https://devzone.nordicsemi.com/f/nordic-q-a/61369/frequency-offset-in-xrftest-cw-testing</link><description>Hi, 
 I noted that the CW generated in the %XRFTEST TX test seems to be offset from the requested frequency. Specifically, issuing the command 
 AT%XRFTEST=1,1,20,8500,-50,0,4,0,0,0,0,0 
 generates a CW wave with a frequency of approximately 850.255 MHz</description><dc:language>en-US</dc:language><generator>Telligent Community 13</generator><lastBuildDate>Mon, 25 May 2020 14:26:41 GMT</lastBuildDate><atom:link rel="self" type="application/rss+xml" href="https://devzone.nordicsemi.com/f/nordic-q-a/61369/frequency-offset-in-xrftest-cw-testing" /><item><title>RE: Frequency offset in %XRFTEST CW testing</title><link>https://devzone.nordicsemi.com/thread/251532?ContentTypeID=1</link><pubDate>Mon, 25 May 2020 14:26:41 GMT</pubDate><guid isPermaLink="false">137ad170-7792-4731-bb38-c0d22fbe4515:8609c800-79f1-4efa-9949-09b43c391594</guid><dc:creator>H&amp;#229;kon Alseth</dc:creator><description>&lt;p&gt;Hi Norbert,&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;Sorry it took a bit of time before I got back to you. I can confirm the behavior, and it is actually done on purpose (in order for certain functionalities, like reporting power output from the AT command), but we have forgotten to properly document this offset. Future revisions of the AT document will have this behavior documented.&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;Again, thank you very much for taking the time to report such oddities back to us, and helping us improve!&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;Kind regards,&lt;/p&gt;
&lt;p&gt;Håkon&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item><item><title>RE: Frequency offset in %XRFTEST CW testing</title><link>https://devzone.nordicsemi.com/thread/250002?ContentTypeID=1</link><pubDate>Thu, 14 May 2020 14:15:48 GMT</pubDate><guid isPermaLink="false">137ad170-7792-4731-bb38-c0d22fbe4515:b3bee049-76a5-4bbe-a80d-9b4d685f9553</guid><dc:creator>H&amp;#229;kon Alseth</dc:creator><description>&lt;p&gt;Hi Norbert,&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
[quote user=""]Is this a known issue, or perhaps expected behavior? I could not find anything in the documentation of the %XRFTEST command.[/quote]
&lt;p&gt;My apologies for the inconvenience, and thank you for reporting this back to us!&lt;/p&gt;
&lt;p&gt;Given that the second command with modulated output is spot on frequency-wise; It sounds like you have stumbled upon a issue on our side.&amp;nbsp;I will check internally and confirm the issue, as I unfortunately do not have access to a spectrum analyzer today, and get back to you soon (a couple of working days).&lt;/p&gt;
&lt;p&gt;&amp;nbsp;&lt;/p&gt;
&lt;p&gt;Kind regards,&lt;/p&gt;
&lt;p&gt;Håkon&lt;/p&gt;&lt;div style="clear:both;"&gt;&lt;/div&gt;</description></item></channel></rss>