[linux-dvb] MT2060 IF1 calculation
Thomas Pinz - DC2RPT
dc2rpt at gmx.de
Wed Dec 6 12:11:24 CET 2006
since there have been now several ideas spoken about the internals of the
MT2060 i would like to clarify some things.
- The MT2060 is a successor of the MT2050, MT2032... all of them are silicon
- The First IF frequency of the MT2060 is a chip-dependend value which has to
be calibrated in the production of the device.
- Some vendors do this and save this value in a eeprom. Others don't
investigate the money for this, they are just using the default value, which
should also give a certain performance, but then there is no guaranty.
So there are two points of view, which should be differentiated.
- For the end user, you get what you buy. If the FIF-information is missing on
your device, your vendor had chosen the cheap variant and decided for you you
have to use the default value with maybe a little bit worser performance.
If there is a EEPROM on the board, ask the vendor how to read out the value,
this are just some bytes.
- A manufacturer of a DVB-device would of course get all of the information
how to calibrate by the manufacturer of the ICs. And also, as Patrick said,
there is also a reference driver and lots of more. But then this mailing
list is simply the wrong place to ask.
ps: Since Chun or others of this chinese company never told us in his several
questions on this list, what he is really trying, i can also imagine that the
real reason could be a very deep look into the internals of ICs.
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