Dorji RF Receiver Problem

Hil all, i have a problem with Dorji Rf Receiver. My transmitter sends data in 53 second period but i cant receive them. I am taking rubbish signals. When i connect data pin to scope. I am seeing a screen like that

In addition. I cant see any data at logic analyzer.

What i should do ?

It is my RF receiver module

Thanks for help

Kindly check the cable and pin connections..! and that no signal wire is touching ground conductor or likewise..!

I checked my connections, there is no problem at connections, that antenna wire is not touching ground conductor.

where you give vcc and gnd to receiver?

I didnt put picture of breadboard circuit to here , but my receivers pins are like below and my connections are correct.

Attachment 93222

It says invalid picture

No they are valid, i can open pictures.

cuz its in your puter cache

I cannot open the pic either. Try again

Dave



Plus as I told you in the other forum

Show us photos of YOUR construction so we can check it for errors

a lone antenna wire twisted around the antenna pin, without any other power or I/O connections will not make the unit work



Dave

It is my construction. Yellow cables go to ground, green one goes to 5V, and orange cable is data cable. I connect it to PIC or Scope . All of them directly connected. There is no extra thing. That capacitor(47 uF), i soldered it as external to prevent AGC by looking IC's(SYN470R) datasheet which inside my receiver module.

Do you have a link to the datasheet?

Sorry, it is here SYN470R datasheet

Why there is a soldered Capacitor? which is not in the datasheet....

Which datasheet do you mean ? dorji or syn470r ? in dorji's datasheet there isnt but in SYN470R's datasheet there is a schema at page 20 that shows a external capacitor added between CAGC and SHUT pins.

assuming the chip is working and the board is correctly laid out, either:
1) your transmitter is too close
2) your transmitter is too far away
3) the AGC R-C timing network has the wrong values for the data rate u are sending
4) there is a strong interfering signal nearby

Thanks for reply i will insist on AGC R-C timing network. Otherwise i will doubt about there is a strong interference.

max value is 4.7uF not 47uH that makes time constant increase by 10 times. typical is 0.47uF. try it.
pls check http://www.instructables.com/files/d...VVDG.LARGE.jpg
Regards.