The
new name, for example, for Philips_SECAM2_DK according to
the table: Philips_C2-A, and the file has the same name
- Philips_C2-A.tun. The filename, as it follows from the
given below table, is defined by its contents, that eliminates
appearance of the counterparts. The names LG or Samsumg
are not used, as its values 'Range', as far as I know, coincide
with similar for Philips. If it not so, write. If you use
customization, which are not reflected in the tables, inform,
and the changes will be brought in.
|
ii
|
Parameter
|
Name
parts
|
|
Name
|
Values
in file
|
Philips_
|
Temic_
|
Unknown_
|
00
|
C0
|
C2
|
|
-100
|
|
-A
|
|
1.
|
Range
|
VHFLow=0x8EA0
VHFHigh=0x8E90
UHF=0x8E30 |
|
|
|
|
|
|
|
|
|
|
VHFLow=0x8E02
VHFHigh=0x8E04
UHF=0x8E01
|
|
|
|
|
|
|
|
|
|
|
VHFLow=0x8e01
VHFHigh=0x8e02
UHF=0x8E08 |
|
|
|
|
|
|
|
|
|
|
|
2.
|
I2C
Address
|
I2CAddress=0x00
|
|
|
|
|
|
|
|
|
|
|
I2CAddress=0xC0
|
|
|
|
|
|
|
|
|
|
|
I2CAddress=0xC2
|
|
|
|
|
|
|
|
|
|
|
|
3.
|
Offset
|
Offset=0
|
|
|
|
|
|
|
|
|
|
|
Offset=-100
|
|
|
|
|
|
|
|
|
|
|
|
4.
|
Thresholds
|
Threshold1=14025
Threshold2=46325 |
|
|
|
|
|
|
|
|
|
|
Threshold1=16825
Threshold2=46325
|
|
|
|
|
|
|
|
|
|
|
Shortly,
the interaction of the controller BT8x8 with the module
of a radiotuner consists in the following. The parameters
"Range" keep the identification of ranges of radiofrequencies
in different modules of tuners. "I2CAddress" answers
for switching and customization of telechannels. "Offset"
sets a certain correction of customization depending on
the standard of a teleannouncement. The parameters "Thresholds",
probably, set a way of interpretation of results of customization,
depending on a range of radiofrequencies, and it is necessary
to tell about them especially.
Standard
values of these parameters is their first pair in the table,
appropriate to absence of an index "-A" in the
name of the configuration file of a tuner. If the telechannels
are placed in standard bars of radiofrequencies, as is described
in a note, it is usual all of them are determined by autoscan
and work normally. However, in Russia the situation is typical,
when the local operators of a teleannouncement convert all
or part of telechannels from a range UHF in a range VHF2
(between VHF1 and VHF3). In this case TV-card, though scans
all frequency range, "does not see" telechannels
in this band at standard values of parameters "Thresholds".
Probably,
Threshold1=14025 defines frequency (140,25 MHz) up to which
the range VHF1 "reaches". If the converted channel
lays below than this frequency - it is tuned normally, is
higher - is not tuned. The given supposition proves to be
true by that the change of the parameter on Threshold1=16825,
i.e. closely in the beginning of a range VHF3, allows a
tuner to find all converted channels. Therefore, along with
standard pair values, updated pair, appropriate to an index
"-A" in the name of the file of a tuner is entered.
Selection
of a tuner configuration for a TV-card
The problem of configure of a tuner arises for everyone,
first time adjusting the TV-card in JTV, as even at the
known manufacturer of the tuner module of a TV-card. If
given in the beginning of a note the table will be enlarged
gradually, this problem will lose the acuteness.
Generally,
the following order of operations is recommended. If the
manufacturer of the module of a radiotuner (shielded box
on a TV-card) is precisely known, for example, Temic, the
variant Temic_00-A is selected. In all
other cases it is necessary to start with Philips_00-A.
If it is known also the parameter I2CAddress, the technique
of which definition is stated in a note,
the choice becomes unambiguous. However even without it,
usually one of existing variants of the configuration should
approach. The correctness of selection comes to light during
customization on telechannels and switchings between them.
If all is customized and switches, the configuration means
is selected correctly. Other variant of the configuration
of a tuner is otherwise selected and the process repeats.
As it is a lot of variants not so, it does not cause the
large difficulties. Successes.
