Hi, Here is the spectrum out of the USB codec with a -73dBm carrier from the XG3:
http://ab2tc.com/new_k3s_usb.png The K3S setting is USB with a passband of 300 to 2400Hz. I left the LINE OUT level set to the factory setting (10), and set the recording level with the Windows mixer (Win7). AB2TC - Knut Joe Subich, W4TV-4 wrote >> Without published specs for dynamic range, SNR, etc. we > > don't have a means of assessing this. > > The CODEC used in the KIO3B is from the same family as used by most of > the amateur USB sound card products (including microHAM USB Interface > III). Unless the designer cuts corners (like the designer of the > Signalink USB) by eliminating critical power supply bypassing and > regulators, performance of all devices using the same family of USB > Audio CODECS will be very similar based on the limits of the 16 bit > ADC, the noise figure of any audio preamplifiers used by the designer > and the power supply noise rejection (does the design properly keep > digital noise out of the power supply for the analog circuits?). > > I have not tested the KIO3B but I certainly would not expect that Wayne > cut any corners in the design. Thus performance of the KIO3B and > microHAM USB Interface III (noise floor, dynamic range, etc.) should > be nearly identical - within unit to unit manufacturing tolerances. > > 73, > > ... Joe, W4TV > <snip> -- View this message in context: http://elecraft.365791.n2.nabble.com/K3IOB-tp7611605p7612091.html Sent from the Elecraft mailing list archive at Nabble.com. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
