Hi , guys,
I tried a small program to light green LED on TE0725 board ｌｏｏｐｉｎｇ ｉｎ the POF in order to verify the function of POF.
The POF that I am using is AFBR-59F3Z. The structure that I want to realize is in attachment.
First, I designed a time divider which can generate 1 Hz signal. It works well directly on green LED at pin M16.
Then ｔｈｅ ｄｅｓｉｇｎ ｗａｓ ｃｈａｎｇｅｄ． Ｉ outputed the signal from time divider by using OBUFDS to pin A10(neg. pin A9), meantime I used IBUFDS to receive the wished signal into FPGA which is then connected to the green LED at M16. One optical fiber is plugged into ｂｏｔｈ ports of AFBR-59F3Z to realize a loop function. But nothing happened.
Afterwards, I tried to use a flash light from my mobilephone to light the receiver port, OK, fine, the green LED responded. But when I checkｅｄ the transmitter port, the LED of it didn't ｗｏｒｋ． Ｉｔ ｓｈｏｕｌｄ ｂｅ ｖｉｓｉｂｌｅ ｂｅｃａｕｓｅ ｔｈｅ ｗａｖｅｌｅｎｇｔｈ ｆｒｏｍ ｔｈｅ ＬＥＤ ｏｆ ＡＦＢＲ ｉｓ ６５０ｎｍ ｉｎ ｔｈｅ ｒａｎｇｅ ｏｆ ｖｉｓｉｂｌｅ ｌｉｇｈｔ．
Ｓｏ ｈｏｗ ｃｏｕｌｄ Ｉ ｓｏｌｖｅ ｔｈｉｓ ｐｒｏｂｌｅｍ？
Hi,
what is the serial of your module?
Best Regards,
Thorsten Trenz