Signal Generator output wrong at certain frequencies

摘要

I have put together an ADF4351 PLL module together with a Micro-mite BackPack, as described in the May 2018 issue fsiliconchip.com. au/Article/11073] and in general am very happy with the results. However, I am measuring a lot of spurious signals around a frequency that I am particularly interested in; 1694.1MHz which is the new GOES 17 Meteorological satellite HRIT transmission frequency. Output at 1691.000MHz (which is the GOES 15 LRIT frequency) is OK.