Message	Date	From	Subject
680	2007-05-01 11:05:02	wbdmxbaileybobbut...	I Q vfo
that vfo pcb that is in the files section, if I understand it correctly the 4 outputs are for feeding a up converter or a down converter correct ? I am thinking about building it for a sig gen for the bench. second question, after reading the post about the LMH 6703 OP amp I ordered two samples and the EV board, got them today. now I this the same type of OP amp that is used on the DDS 60 doughter card ?. I am new to all this IQ and toroid winding stuff and am getting into it as best as I can, if I understand it correctly the I and Q signals are RF at the same frequency but with the phase shift, correct ? thanks for the help bob WB7DMX
705	2007-05-03 16:51:10	topossibilities	Re: I Q vfo
> that vfo pcb that is in the files section, if I understand it > the 4 outputs are for feeding a up converter or a down converter > correct ? The design has 2 pairs of I-Q outputs because I was building a transceiver and used one pair was for the receiver section and the other for the transmit section. > if I understand it correctly the I and Q signals are RF at the same > frequency but with the phase shift, correct ? Yes. Ed, W1AAZ Lots of books, parts, kits, test equipment for sale at: http://mysite.verizon.net/topossibilities/
708	2007-05-03 19:18:09	wbdmxbaileybobbut...	Re: I Q vfo

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680

2007-05-01 11:05:02

wbdmxbaileybobbut...

I Q vfo

that vfo pcb that is in the files section, if I understand it correctly
the 4 outputs are for feeding a up converter or a down converter
correct ?
I am thinking about building it for a sig gen for the bench.

second question, after reading the post about the LMH 6703 OP amp I
ordered two samples and the EV board, got them today.
now I this the same type of OP amp that is used on the DDS 60 doughter
card ?.

I am new to all this IQ and toroid winding stuff and am getting into it
as best as I can,
if I understand it correctly the I and Q signals are RF at the same
frequency but with the phase shift, correct ?

thanks for the help

bob
WB7DMX

705

2007-05-03 16:51:10

topossibilities

Re: I Q vfo

> that vfo pcb that is in the files section, if I understand it
> the 4 outputs are for feeding a up converter or a down converter
> correct ?

The design has 2 pairs of I-Q outputs because I was building a
transceiver and used one pair was for the receiver section and the
other for the transmit section.

> if I understand it correctly the I and Q signals are RF at the same
> frequency but with the phase shift, correct ?

Yes.

Ed, W1AAZ

Lots of books, parts, kits, test equipment for sale at:

http://mysite.verizon.net/topossibilities/

708

2007-05-03 19:18:09

wbdmxbaileybobbut...

Re: I Q vfo