Subject:
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RF transceiver
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Sat, 9 Oct 1999 07:27:08 GMT
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Original-From:
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William Ho <ukho@tm.[Spamless]net.my>
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Viewed:
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765 times
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Hi , I am a handyboard user and I am trying to build a tele-robot.
I am using the transmitter and receiver from Glolab.
I have fix up a pair of transceiver namely "A" and "B" (with TM1V and RM1V) as
guided in "How Encoders and Decoders work" using HT-680 and HT-694.
Transceiver "A" is connected to my host computer and transceiver "B" is
connected to my handyboard.
Each transceiver has their common ground and +V5. These transceivers work well
in half-duplex mode. I fixed a LED to the VT port of HT-694 and the LED
light-up whenever valid data is being received.
But I can't operate these transceiver in full duplex mode. Whenever the
transceiver "A" is busy receiving data, it just can't transmit out any signal.
When the receiving LED "A" (VT) is light-up, and when I tried to pull the TE of
the transmitter "A" to ON (+5V sharing power source for both TM1V and RM1V), the
receiving LED turn off and the other transceiver "B" didn't receiving any
signal as the led "B" didn't light-up.
I tried to solve this problem to have two antennas for transmitter and receiver
but end up with the same result.
I tried to separate the +5V power source for the transmitter and receiver but
this doesn't solve my problem. It is not possible for me to separate the common
ground (if this is the solution) as I need to connect all of the signal to one
parallel port from my host computer with one common ground.
Please advise on the above matter.
Thank You.
Regards,
William
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