Re: [FT100] need help, this is for your benefit!!
- I've included a new page in the FAQ to help explain
this pigtail connector. It's linked at the bottom of
http://k0lee.com/ft100faq.html#banddata or you can go
right to it at:
--- Ham_Tech@... wrote:
> Hi everyone,The service manual labels it as an input to the FT100,
> I got the FT100 Operator's Manual and the FC-20
> Service Manual.
> I am working on the Tuning Circuit...
> A. I need to know what Tx InH is for?? Does it
> provide a Logical 1 at
> +5V when the TUN button is pushed??
presumably for the downstream device to prevent the
FT100 from transmitting.
> B. I also need you to test if you can, what comesWhen configured with a Tuner, I believe that most
> out of these Band
> Data pigtail pins when; the FC-20 is selected by
> the menus; the TUN
> button is pushed??
> -specify the voltages for each pin:
communication occurs over the serial lines, i.e., Data
In and Data Out in serial commands. I'm not sure that
Yaesu even publishes the Tuner command protocol. The
Data In, according to the service manual is an output,
i.e., the TXD line for the FT100. Serial
communication is always a little confusing because the
TX of one device is connected to the RX of the other
and vice versa so when you're talking about Data In
and Data Out, it gets inverted depending on the device
you're referring to.
> C. What are the diferences between pins (3,6 -The service manual doesn't call pin 2 TX GND, it calls
> GND) and (2 - TX GND)??
it LIN and it's an input to the FT100. In looking
over the schematics, it appears to be related to the
PTT circuit on the CTRL board.
> D. Is pin 1; which is 13.5VDC; constant or is itThis line is just providing power to the downstream
> only on when the TUN
> is pushed??
device, i.e., the tuner.
> E. Does pin 7; RESET; supply a Logical 1 at +5VNote also that this is inconsistent in the operating
> when pin 4 (Data In)
> senses a low VSWR or does it sense a logical 0 or 1
> for the signal??
manual vs. the service manual. The operating manual
shows Reset on pin 7, the service manual shows it on
pin 6. It is considered an output from the FT100,
presumably to reset the Tuner.
Lee Devlin, K0LEE
Visit the FT100 FAQ at http://k0lee.com/ft100faq.html
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