[Premium-Rx] WJ8618A problem

[Борис Никитин]

 Hello Tom,

8618A have not FE. It covered band to 1100 MHz like standart option.
Receiver has two bands:
20-500 MHZ
500-1100 MHZ

Second band has his own UHF Preselector A3A1 unit.
It divided for three bands:
500-700
700-900
900-1100 MHZ

So, looks like something wrong with that preselector or digital control data to perform selection in that unit.
Antenna switch covered band 500-1100 MHZ, so it must work well on 900MHZ too if working well before that frequency.

1 st Local Oscillator Synthesizer, very special there and has 4 bands. (two for  low and two for hight reception bands respectively)
Controlled by digital data automatically. Can be a problem also, but not exact information about 1st LO frequency bands available.

B.R.

Boris