liberal
Advanced Member level 4
I design a Receiver as below with MiNi's Product .
>>
>> filter---AMP----MCA1-24---MAR-6--filter--amp2--
>>
>> nowthe receiver NF tested is 14dB.
>>
>> But the first filter and AMP 's Gain and NF tested is 14.8dB and 9dB
>>
>> the MAR-6\ filter and amp2's Gain and NF tested is 28dB and 2.8dB
>>
>> but why the NF is worsened to 14dB when added Mixer MCA1-24,the LO I
>> used is better.the MCA1-24's VSWR is not very good,does it matter?can
>> u tell me why the NFworsened?Thank you.
>>
>> filter---AMP----MCA1-24---MAR-6--filter--amp2--
>>
>> nowthe receiver NF tested is 14dB.
>>
>> But the first filter and AMP 's Gain and NF tested is 14.8dB and 9dB
>>
>> the MAR-6\ filter and amp2's Gain and NF tested is 28dB and 2.8dB
>>
>> but why the NF is worsened to 14dB when added Mixer MCA1-24,the LO I
>> used is better.the MCA1-24's VSWR is not very good,does it matter?can
>> u tell me why the NFworsened?Thank you.