Hi team,
The customer use LMX2492 + CHC2442 to generate 24G source signal, originally, 40MHz TCXO feeding to LMX2492, they works well for 24GHz source signal generation. However, when switching to 100MHz VCXO feeding to LMX2492, they could not functionally be operating that the output signal is unlocked. For debugging, the customer use SG as OSCin, it is found that OSCin frequency less than 80MHz, they could work well, but LMX2492 could not lock the output when OSCin frequency is higher than 80MHz. The customer use TI official software tool for LMX2492 configuration, it should be OK for REGs setup. According to the datasheet, LMX2492 OSCin could be lower than 600MHz, so what's the problem of this case? REGs OK, 100MHz OSCin, but LMX2492 could not lock the output, while works well when OSCin below 80MHz.
Could you help check this case? Thanks.
Best Regards,
Cherry
