- Tue May 02, 2017 2:12 am
#194643
Hi guys, I'm new in this industry and would like to seek advice on the following:
I have got a laboratory power supply (front panel and a motherboard connected by a Flexible Flat Cable, FFC). I was told that the serial communication between this two panels has a baud rate of 115200bps.
All the components powered off, isolators shorted, with continuity test checked on both ends. I have the contacts of the TX/RX for the front panel and motherboard wired out and connected each to db9 rs232 connected to one laptop each. (PC1 - front panel - (FFC connected) motherboard - PC2)
with null modem for full handshaking configuration on PC1-PC2, i'm able to reach a baudrate of 921600 (max for the hyperterminal), but with the implementation of the power supply in between i can only go up to 19200, which is too low a rate.
I've shortened the cables, twisted them to reduce noise, but I'm still unable to raise the BR (unable as in i will not be able to transmit/receive on the other end).
I've tried to use a digital oscilloscope on the TX for the rising pulse to determine the actual BR but i'm always getting the similar time for a pulse despite increasing the BR on the comport.
Anyone is able to advise me on what should i try to do?
Positive advice is always welcomed:)
thanks guys!
I have got a laboratory power supply (front panel and a motherboard connected by a Flexible Flat Cable, FFC). I was told that the serial communication between this two panels has a baud rate of 115200bps.
All the components powered off, isolators shorted, with continuity test checked on both ends. I have the contacts of the TX/RX for the front panel and motherboard wired out and connected each to db9 rs232 connected to one laptop each. (PC1 - front panel - (FFC connected) motherboard - PC2)
with null modem for full handshaking configuration on PC1-PC2, i'm able to reach a baudrate of 921600 (max for the hyperterminal), but with the implementation of the power supply in between i can only go up to 19200, which is too low a rate.
I've shortened the cables, twisted them to reduce noise, but I'm still unable to raise the BR (unable as in i will not be able to transmit/receive on the other end).
I've tried to use a digital oscilloscope on the TX for the rising pulse to determine the actual BR but i'm always getting the similar time for a pulse despite increasing the BR on the comport.
Anyone is able to advise me on what should i try to do?
Positive advice is always welcomed:)
thanks guys!