PTV_Archive/makelogo/SDIBLACK.DOC

{\rtf1\ansi\ansicpg1252\uc1 \deff0\deflang1033\deflangfe1030{\fonttbl{\f0\froman\fcharset0\fprq2{\*\panose 02020603050405020304}Times New Roman;}{\f1\fswiss\fcharset0\fprq2{\*\panose 020b0604020202020204}Arial;}{\f3\froman\fcharset2\fprq2{\*\panose 05050102010706020507}Symbol;}{\f16\froman\fcharset238\fprq2 Times New Roman CE;}{\f17\froman\fcharset204\fprq2 Times New Roman Cyr;}{\f19\froman\fcharset161\fprq2 Times New Roman Greek;}{\f20\froman\fcharset162\fprq2 Times New Roman Tur;}{\f21\froman\fcharset186\fprq2 Times New Roman Baltic;}{\f22\fswiss\fcharset238\fprq2 Arial CE;}{\f23\fswiss\fcharset204\fprq2 Arial Cyr;}{\f25\fswiss\fcharset161\fprq2 Arial Greek;}{\f26\fswiss\fcharset162\fprq2 Arial Tur;}{\f27\fswiss\fcharset186\fprq2 Arial Baltic;}}{\colortbl;\red0\green0\blue0;\red0\green0\blue255;\red0\green255\blue255;\red0\green255\blue0;\red255\green0\blue255;\red255\green0\blue0;\red255\green255\blue0;\red255\green255\blue255;\red0\green0\blue128;\red0\green128\blue128;\red0\green128\blue0;\red128\green0\blue128;\red128\green0\blue0;\red128\green128\blue0;\red128\green128\blue128;\red192\green192\blue192;}{\stylesheet{\nowidctlpar\widctlpar\tx284\adjustright \f1\lang1030\cgrid \snext0 Normal;}{\s1\sb240\sa60\keepn\nowidctlpar\adjustright \b\lang1030\kerning28\cgrid \sbasedon0 \snext0 heading 1;}{\*\cs10 \additive Default Paragraph Font;}{\s15\fi-1418\li1418\nowidctlpar\widctlpar\adjustright \f1\lang1030\cgrid \sbasedon0 \snext15 hæng;}{\s16\fi-1701\li1701\nowidctlpar\widctlpar\tx284\tx1701\adjustright \f1\lang1030\cgrid \sbasedon0 \snext16 indryk;}{\s17\fi-1418\li1418\nowidctlpar\widctlpar\tx1418\adjustright \f1\lang1030\cgrid \sbasedon15 \snext17 hæng1;}{\s18\sb360\nowidctlpar\tqr\tx9026\adjustright \b\lang1030\cgrid \sbasedon0 \snext0 toc 1;}{\s19\nowidctlpar\widctlpar\tqc\tx4819\tqr\tx9638\adjustright \f1\lang1030\cgrid \sbasedon0 \snext19 header;}{\s20\nowidctlpar\widctlpar\tqc\tx4819\tqr\tx9638\adjustright \f1\lang1030\cgrid \sbasedon0 \snext20 footer;}{\*\cs21 \additive \sbasedon10 page number;}}{\info{\title SDI black & color bar generator.}{\author niels}{\operator niels}{\creatim\yr1997\mo3\dy24\hr16\min23}{\revtim\yr2002\mo9\dy18\hr13\min8}{\version5}{\edmins7}{\nofpages2}{\nofwords0}{\nofchars0}{\*\company PTV}{\nofcharsws0}{\vern73}}\paperw11906\paperh16838\margl1134\margr1134\margt1701\margb1701 \deftab1304\widowctrl\ftnbj\aenddoc\hyphhotz425\lytprtmet\formshade\viewkind4\viewscale114\viewzk2\pgbrdrhead\pgbrdrfoot \fet0\sectd \linex0\headery709\footery709\colsx709\endnhere\sectdefaultcl {\footer \pard\plain \s20\nowidctlpar\widctlpar\tqc\tx4819\tqr\tx9638\adjustright \f1\lang1030\cgrid {\pard\plain \s20\nowidctlpar\widctlpar\tqc\tx4819\tqr\tx9638\adjustright \v\f1\fs20\lang1030\cgrid {\tc {\fs20 }}}{\field\fldedit{\*\fldinst {\fs20  INDEX  \\* LOWER }}{\fldrslt {\field{\*\fldinst {\fs20  FILENAME  \\* LOWER }}{\fldrslt {\fs20 SDIBLACK.DOC}}}}}{\fs20 \tab \tab }{\field{\*\fldinst {\cs21\fs20  PAGE }}{\fldrslt {\cs21\fs20\lang1024 2}}}{\fs20 /}{\field{\*\fldinst {\fs20  NUMPAGES  \\* LOWER }}{\fldrslt {\fs20 2}}}{\fs20 
\par }}{\*\pnseclvl1\pnucrm\pnstart1\pnindent720\pnhang{\pntxta .}}{\*\pnseclvl2\pnucltr\pnstart1\pnindent720\pnhang{\pntxta .}}{\*\pnseclvl3\pndec\pnstart1\pnindent720\pnhang{\pntxta .}}{\*\pnseclvl4\pnlcltr\pnstart1\pnindent720\pnhang{\pntxta )}}{\*\pnseclvl5\pndec\pnstart1\pnindent720\pnhang{\pntxtb (}{\pntxta )}}{\*\pnseclvl6\pnlcltr\pnstart1\pnindent720\pnhang{\pntxtb (}{\pntxta )}}{\*\pnseclvl7\pnlcrm\pnstart1\pnindent720\pnhang{\pntxtb (}{\pntxta )}}{\*\pnseclvl8\pnlcltr\pnstart1\pnindent720\pnhang{\pntxtb (}{\pntxta )}}{\*\pnseclvl9\pnlcrm\pnstart1\pnindent720\pnhang{\pntxtb (}{\pntxta )}}\pard\plain \nowidctlpar\widctlpar\tx284\adjustright \f1\lang1030\cgrid {\b\lang1033 SDI black & color bar generator.
\par }\pard \nowidctlpar\widctlpar\tx284\adjustright {\lang1033 
\par This unit can generate either a black signal or a color bar. In 625 lines system a 75 % or a 100 % can be selected. In 525 lines system a SMPTE color bar is selected. The unit has two parallel outputs.
\par 
\par The selected signal can be time adjusted ± 1 field ( totally 625 lines or 525 lines) with a resolution of 1/27E6 sec.
\par 
\par This unit is controlled by a }{\lang1033 {\field{\*\fldinst SYMBOL 109 \\f "Symbol" \\s 12}{\fldrslt\f3\fs24}}}{\lang1033 -controller. This }{\lang1033 {\field{\*\fldinst SYMBOL 109 \\f "Symbol" \\s 12}{\fldrslt\f3\fs24}}}{\lang1033 -controller interfaces to the master controller via a two-wire serial bus and a reset wire. The video part of the generator is controlled by a clock signal and, for each system (625 lines and 525 lines), a line pulse (625 lines: FH_G; 525 lines: FH_M) and a color framing pulse. Color framing: 625 lines/525 lines: 2500/1050 lines between each pulse. (625 lines: F8_G; 525 lines: F4_M). 
\par 
\par When power is switched on, the master controller detects presence of one or more SDI black & color bar generators. When detected, the unit(s) receive information of what to generate, pattern, sound, EDH-codes and timing. When this information is received, sounddata and color bars for the chosen system are stored in RAM (V56 & V57). When writing to the RAM, PS-bit (V50, pin 40) is high, else low. Last a 11 bit word is written to H-OFFSET PORT. This word is the sample offset between incoming and generated line pulse. Line and field offset is generated by the }{\lang1033 {\field{\*\fldinst SYMBOL 109 \\f "Symbol" \\s 12}{\fldrslt\f3\fs24}}}{\lang1033 -controller, see later.
\par 
\par From system select inside V54 and the H-counter inside V63 comes a field/8 or field/4 (VINT)and a line interrupt (HINT) to the }{\lang1033 {\field{\*\fldinst SYMBOL 109 \\f "Symbol" \\s 12}{\fldrslt\f3\fs24}}}{\lang1033 -controller. From these interrupts two bits are generated (V73, pin18 & 19). These two bits together with H-counter combines to correct black line. Two bits (V73, pin 17 & 16) is used to select 1 of 4 possible lines to generate, 0 0 = black line; 0 1, 1 0 and 1 1 will generate one of the 3 color bar lines stored in RAM. The RAM-address for the color bar comes from H-counter in V63. 
\par 
\par Sound is also inserted to the signal in V63. When SOUND-bit (V73, pin 13) is high, sound-framing words are generated in \lquote sound framing generator\rquote . Sound data are inserted in the data multiplexer, which also calculates and inserts a checksum for sound data on each line. Sound data are stored in RAM and addressed by \lquote Sound address counter\rquote  in V63. When FIELD_1, V73, pin 12 is low, 3 sound samples for each of the four channels are inserted. When FIELD_1 is high, 4 samples are inserted. 
\par 
\par At the output on V63, [DO9..DO0] pin 21 to 9 a correct 10 bit D1 parallel signal is present. These ten bits are clocked into EDH-inserter V65. This circuit calculates and inserts EDH-codes to the data stream. Insertion takes place when EDH-bit (V73, pin 15) is low. When EDH-bit is high, data are clocked through without modification.
\par 
\par The ten bits are serialized in V59. Output from this circuit feeds the output amplifier V60. This amplifier contains 2 amplifiers which drives 2 output BNC-connectors. Signals on these connectors are identical but independent of each other. 
\par 
\par A level detector is connected, via transformers TR1 and TR2, directly to the output BNC\rquote s. For TR1: Signal from this transformer is rectified by D201 and V201A. The signal is then lowpass-filtered and amplified by V201B. This gives a, nearly, DC-voltage at TP201/TP205 on -1.3V when the signal is correct (output open or terminated). This voltage holds TP202 and XA1, pin 5 high. If signal at the BNC-connector  vanishes, e.g. amplifier\rquote s not working, the DC-voltage raises to 0V. Then V203B takes TP202 and XA1, pin 5 low, indicating an error. Similar function for TR2, V211, V213 & XA1, pin 6.
\par 
\par Test pins:
\par 
\par }\pard\plain \s15\fi-567\li567\nowidctlpar\widctlpar\adjustright \f1\lang1030\cgrid {\lang1033 TP5: On this pin is a 27Mhz clock signal, which is regenerated form incoming video data. This clock is 0.8V centered around 3.5V.
\par 
\par TP6: This pin is low when data words  00.x}{\lang1033\sub Hex }{\lang1033 and FF.x}{\lang1033\sub H ex }{\lang1033 are received, else high.
\par }\pard\plain \nowidctlpar\widctlpar\tx284\adjustright \f1\lang1030\cgrid {\lang1033 
\par }\pard \nowidctlpar\widctlpar\tx284\adjustright {\lang1033 These two pins could be used to indicate whether V59 locks properly to incoming data stream or not.
\par }}