No output from module

[CDutescu]

First and foremost, I want to express my gratitude for your effort in developing this library for the MAX2870 chip. I am currently working on configuring the MAX2871 chip in a MAXREFDES161, which comes equipped with a built-in 50MHz oscillator. I've utilized the convenient spreadsheet provided in this repo, specifically in conjunction with the "FREQ_DIRECT 1 50 1 0 1 0 TRUE" command. In sequence, I've executed the following commands, receiving "OK" responses:

1. CE ON
2. STATUS
3. REF 50000000 1 UNDIVIDED
4. FREQ 1000000000 1 1 FUNDAMENTAL 0 0

Despite running these commands, I have not been able to observe any output from either Output A or B on my Evaluation Board. I would greatly appreciate any guidance or assistance in generating an output signal.

[brycecherry75]

From this information, the VCO is running at 2.5 GHz which is below its limit of 3-6 GHz; I have corrected the "VCO" TRUE/FALSE range check in the spreadsheet calculator as I have reused a calculator for the ADF4351 (having a VCO range of 2.2-4.4 GHz and a number of register similarities) which this error was unforseen.
For the FREQ_DIRECT command, RF_DIVIDER needs to be 1/2/4/8/16/32/64/128, MOD_value needs to be from 2-4095 and if FRAC_value is 0, FRACTIONAL_MODE is false (otherwise, true).