BT878 계열의 TV 수신칩을 제어가능한데, 그 외에 몇가지 칩도 지원을 한다.
아무튼, Pinnacle DC10 plus 라는 녀석을 검색해보면 아래와 같이 v4l2를 지원한다는데
VLC에서 나오지 않아 xawtv에서 출력을 하지만, 창의 크기를 바꾼다던가 하면 나오지 않는 문제가 발생했다.
$ xawtv -hwscan
This is xawtv-3.95.dfsg.1, running on Linux/i686 (2.6.32-23-generic)
looking for available devices
port 164-195
type : Xvideo, image scaler
name : NV05 Video Blitter
/dev/video0: OK [ -device /dev/video0 ] type : v4l2
name : DC10plus[0]
flags: overlay capture
참고사항으로, xawtv는 ssh를 통해서는 아래와 같이 도움말 조차도 볼수가 없다. (X11 Tunneling 하면 되려나?)
$ xawtv --help
xdpyinfo: unable to open display "".
This is xawtv-3.95.dfsg.1, running on Linux/i686 (2.6.32-23-generic)
Error: Can't open display:
$ xawtv --help
This is xawtv-3.95.dfsg.1, running on Linux/i686 (2.6.32-23-generic)
usage: xawtv [ options ] [ station ]
options:
-h -help print this text
-v -debug n debug level n, n = [0..2]
-remote assume remote display
-n -noconf don't read the config file
-m -nomouse startup with mouse pointer disabled
-f -fullscreen startup in fullscreen mode
-(no)dga enable/disable DGA extention
-(no)vm enable/disable VidMode extention
-(no)randr enable/disable Xrandr extention
-(no)xv enable/disable Xvideo extention altogether
-(no)xv-video enable/disable Xvideo extention (for video only,
i.e. XvPutVideo() calls)
-(no)xv-image enable/disable Xvideo extention (for image scaling
only, i.e. XvPutImage() calls)
-(no)gl enable/disable OpenGL
-b -bpp n color depth of the display is n (n=24,32)
-o -outfile file filename base for snapshots
-c -device file use <file> as video4linux device
-C -dspdev file use <file> as audio (oss) device
-vbidev file use <file> as vbi device
-joydev file use <file> as joystick device
-shift x shift display by x bytes
-fb let fb (not X) set up v4l device
-parallel n use n compression threads
-bufcount n use n video buffers
-hwscan print a list of available devices.
station:
this is one of the stations listed in $HOME/.xawtv
Check the manual page for a more detailed description.
캐패시터 별로 주파수 특성이 있다고 해서
어떤걸 달아야 하나 고심을 하고 있었는데, 솔찍히 안달아도 상관은 없고
세라믹 / 전해 / 탄탈 캐패티서가 1uF 용으로 추천된다고 되어있다.
세라믹 / 탄탈 / 전해 / 마이카 / 마일러
Instead of adding more
subjective specifications, I prefer to refer to the Maxim 232 datasheet.
It's rather clear in all regards, I think.
Quote:
The capacitor type used for C1–C4 is not critical
for proper operation. The MAX232E and MAX241E require 1µF capacitors,
although in all cases capacitors up to 10µF can be used without harm.
Ceramic, aluminum-electrolytic, or tantalum capacitors are suggested for
the 1µF capacitors.
When using the minimum recommended capacitor values, make sure the
capacitance value does not degrade excessively as the operating
temperature varies. If in doubt, use capacitors with a larger (e.g., 2x)
nominal value. The capacitors’ effective series resistance (ESR), which
usually rises at low temperatures, influences the amount of ripple on
V+ and V-.
Use larger capacitors (up to 10µF) to reduce the output impedance at V+
and V-. This can be useful when “stealing” power from V+ or from V-.