This package contains the following files:
DECBRG.PLT  The PAD-Bridges in HPGL. (UNCHANGED)
DECCMP.TXT  The components listing. (CHANGED TO MATCH DECPLC.PLT)
DECDOC.TXT  This file! (CHANGED)
DECPCB.PLT  The PCB drawing in HPGL. approx 100x160 mm. (UNCHANGED)
DECPLC.PLT  The Placement drawing in HPGL. (UNCHANGED)
DECPRG.BIN  The binary program that has to be programmed into the 8749 (NEW)
DECPRG.HEX  Hexdump of the program (NEW)
DECPRG.TXT  The microcontroller program (NEW)
DECSCH.PLT  The circuit drawing in HPGL. (CHANGED TO MATCH DECPLC.PLT)
            U7 pin 2 & 3 swap, R27 = 10K, R28 = 470K, C19 = 100p, C20 = 150p

The new program works with the NEW FilmNet (Plus & MovieChannel) encoded signal
on cable systems (with Sound in Sync) and the OLD decoder. *VIDEO ONLY*

Adjustmentprocedure.

 1) Start with connecting pin 35 of U7 (8749) to ground.
    Turn R39 1/4 from gnd, R26 halfway, R38 to gnd, C9 and C6 halfway.
    Jumper JP5 in position so that P27 is connected (pin 38 of U7).

 2) Apply an encoded signal, ie FilmNet Plus or FilmNet MovieChannel to the
    input and connect the output to a TV/receiver input.

 3) Apply 12V to the supply input (J1). Now a picture will appear, rolling
    over the screen.

 4) Turn C9 until the picture slowly scrols to the left, about 1 roll per
    2 (or more) seconds.

 5) Now turn R38 till the signal is decoded, and turn C6 to the middle of
    the 2 ends where the picture begins to scroll. Try to turn R38 a bit
    back to ground if the hold-region is too big.

    On the screen appeared 1 to 3 vertical lines:
     - left: original inputsignal is inverted (debug info)
     - middle: always active (adjusting: straight line (C6,C9,R38))
     - right: blacklevel (adjusting: should be absent (R39))

 6) Turn R39 till the blacklevel is equal to the blanking-level, or black
    appears to be normal on the screen, not too black, and not too grey
    (rightmost line should not be there).

 7) Finaly adjust R26 so that the contrast of the picture appears to be
    normal.

 8) Now remove the power and the connection between pin 35 of U7 and ground.
    Turn R38 to ground. And turn on the power.

 9) And turn R38 slowly until the picture appears, turn R38 a little bit
    further. You can fine adjust it using C9 and/or R38.

Well, for the electronics here a explanation of the adjustment points.
R38  Input level to chroma detector.
R39  Input level of the CVBS signal, adjust so that the blacklevel is equal
     to the blanking level. (scope on rastersync)
R26  Output level of the decoded CVBS signal. maximum is about 2.6Vtt
C6   Chroma filter resonance. adjust to 4.43 MHz.
C9   VCO free-running frequency. see TP.

                                JdJ (July 1995)