On 9 August 2016 at 10:15, 赵晋洪 <zhdiam...@163.com> wrote: > > When I see the schematic, I found the U3(LP0603A1880ANTR) - RX LOWPASS FILTER, and u8 (DEA162400HT-8004B1)- RX HIGHPASS FILTER. > But I found that , the two filter 's have the directional input and output port.
The filter are labelled as "in" and "out", but in reality they work in both directions. > The TX mode is suitable for the design, because the tx's input connects the filter's input port. For example , the u3 's input port is the pin4, output port is pin1. > But the rx mode is not right. For the rx's input connects the filter 's output port. for example , the rx signal is from the u5's pin2 -> c18-> u3's pin1, which is for out . > > Was it right? why design like this?
_______________________________________________ HackRF-dev mailing list HackRF-dev@greatscottgadgets.com https://pairlist9.pair.net/mailman/listinfo/hackrf-dev
