Need help finding the RSSI pin on my 900mhz RX
This is where I bought it about 8-10 years ago but it still looks the same as this one.
I thought I found it but the pin I connected the red wire to only reads 2.4v constant. I guess I was rushing and thought it was in flux but it's not. I'm trying to connect my Range Video Micro Diversity up. I have this 900 MHz RX and the other is the HobbyKing 900 MHz 200mw one. I found the HoobyKings RSSI but now trying to find this ones getting to be a challenge. I vmetered all the pins and none are changing but the number 4 connected pin. It's at 1.9v without TX connected then jumps to 2.4 when TX is turned on.
HELP!!!! Please let me know if more detailed photos are needed. I was wondering since its so old would it be possible that is may not have a RSSI?
Thanks in advance!
Here are some more detailed pics.