Pictures: green line is transmitter input, blue line receiver output.
Pictures both shows start of paket transmission (48bit pakets with 12ms pause (at 1kBit), 22ms pause (at 0.5kB)),
first picture at 1kB, second one at 0.5kB
Using CC1125 in transparent mode, we face a mysterious issue.
We transfer data first with 1kBaud and second with 0.5kB
Having 1125 as sender and
a. 1125 as receiver; receiver output delivers correct data, at both data rates. By the way:is it correct to have ~150us delay beween sender and receiver?
b. our old robust narrow band receiver with 1000 of pcs. out in the field,
At 1kB everything's fine (see first picture), but at 0.5kB we have a 'bit' at the receiver before TX starts!
And: after this ghost bit the rising edge of receiver is nearly in sync with transmitter. Then the high phase of receiver is much longer. Then at the second sender bit the signal looks OK again, but too late for the decoder....
This happens every other second:some pakets are OK, then we have faulty ones again.
If we use our 'old' transmitters, we don't have any of these problems!
Any clue where we could look at?
thx.