RF Interferance

[Dave]

Toley00, What do you mean "catch information from another source "? Does the receiver have a squelch control? If not then the data slicer is probably picking up noise when there is no transmission. What protocol are you using? are you looking for a "sync byte or period"? are you trying to connect the receiver directly to an RS232 port?

Dave Purola,
N8NTA

[Toley00]

Hi Dave, I think I was in the wrong track. Effectively what I received seems to be only noise and not "another source" (I probably watch to much X-Files when I was young ).

My receiver's output is connected to a PIC who show the results on a LCD.

Now I'm working on a protocol and it's not as simple as I first think. For a first test, I try to send only 3 bytes of data but I expect to be able to send more. I convert them to Manchester but now I have to send 3 words. I send before 2 times $AA I read here that it's necessary for the receiver to adjust is AGC.

My problem is that I use the SEROUT2 command to send data but it has to be 8 bits wide and I'm unable to seperate word array into lowbyte and highbyte. I receive an error message.

SEROUT2 DATPIN,16780,[$AA,$AA,MAN[0].LOWBYTE]

ERROR Line 47: This style array syntax not supported, (rf675tx02.bas)

Do I have to use independant word variable for each manchester encoded byte or is there another way ? Is the SEROUT2 method is not appropriate for this kind of comminucation ?

I've put a lot of time in this project and really want this to work so any help will be very appreciate thank you.

[skimask]

Hi Dave, I think I was in the wrong track. Effectively what I received seems to be only noise and not "another source" (I probably watch to much X-Files when I was young ).

My receiver's output is connected to a PIC who show the results on a LCD.

Now I'm working on a protocol and it's not as simple as I first think. For a first test, I try to send only 3 bytes of data but I expect to be able to send more. I convert them to Manchester but now I have to send 3 words. I send before 2 times $AA I read here that it's necessary for the receiver to adjust is AGC.

My problem is that I use the SEROUT2 command to send data but it has to be 8 bits wide and I'm unable to seperate word array into lowbyte and highbyte. I receive an error message.

SEROUT2 DATPIN,16780,[$AA,$AA,MAN[0].LOWBYTE]

ERROR Line 47: This style array syntax not supported, (rf675tx02.bas)

Do I have to use independant word variable for each manchester encoded byte or is there another way ? Is the SEROUT2 method is not appropriate for this kind of comminucation ?

I've put a lot of time in this project and really want this to work so any help will be very appreciate thank you.

See Section 7.6 of the PBP manual. All questions will be answered there pertaining to your errors.

[Toley00]

I may be wrong but I believe that PIC12F675 has a 14 bits core even if it's a 12F series.

[skimask]

I may be wrong but I believe that PIC12F675 has a 14 bits core even if it's a 12F series.

rf12F675 = 12 bit
12F675 = 14 bit
don't ask me why...you'd figure they'd give them different designations or something...