Re: Chinese ADF4351 signal source
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I have no experience of reading SMD component values so looking on Google it seems my R7 (code 74B) is 5.76k ohms and R9 (code 810) is 680R (see attached picture).
Calculating the value of Rset using 5.76k gives a value of Icp of 4.427mA. Reading the datasheet I should set the charge pump current registers to '1101' for Icp=4.38mA.
Having done this I can still get lock from 35 MHz to 4400 MHz and I have corrected a bug in F1CJN's sketch that meant that the lock status was not being updated correctly on the LCD.
On Mon, 4 Jan 2021 at 16:19, Robin Szemeti - G1YFG <robin@...> wrote: