fcembrola wrote:
>
> Hello picsters!
>
> My project involves using a PIC 16C84 to
> control a UHF digitally programmable
> modulator. It uses the I2C BUS to program its
> modulated frequency.
>
> The modulator in question has 8 pins labelled
> as follows:
>
> 1 - SCL (this is the serial clock)
> 2 - SDA (the serial data)
> 3 - VT
> 4 - Video in
> 5 - Audio in
> 6 - +5v
> 7 - GND
> 8 - Boost
>
> I can understand, and know how to use all the
> functions of the pins except for
> pin 3 (VT). I have no idea what it is
> supposed to do and how to use it. I would
> appreciate any help or any hint where I can
> get the right info.
>
> The modulator part number is RMBT-UK36L
>
> Francesco Cembrola
Francesco: The VT (or on some tuners TV) is the tuning voltage. It is an
OUTPUT that varies with the pll frequency chosen by the mcu.   -Dave
Miga, Electronic Design Specialists