According to the datasheet, 100 MHz is the maximum phase detector frequency in Fractional B mode.
Using the 833 eval board, I am supplying 100 MHz at the reference pin and have my R divider set to "1" but I cannot lock at a PD rate of 100 MHz. If I adjust the external reference frequency to about 94 MHz or lower, or if I set the R divider to "2" the signal will lock.
Can the HMC833 PD be used at 100 MHz???