Constant adf4351::constants::OUT_FREQ_P45_MAX

pub const OUT_FREQ_P45_MAX: u64 = 3_600_000_000;

When the prescaler is set to 4/5, the maximum RF frequency allowed is 3.6 GHz. Therefore, when operating the ADF4351 above 3.6 GHz, the prescaler must be set to 8/9.