The Jumper is removed, there is 0 volts provided on the antenna input
of the T-1500.
The resistance of the antenna itself shows 3.3 Ohms which is quite
low, but as the booster is removed this should be OK I think?
On 21 Feb 2007, at 16:55, Jouni wrote:
You can check the antenna with ohm-meter, if it is near 0, then it
would
short the 5V supply. But if you disabled the 5V with jumper
(checked it
with voltmeter?) it would not make difference.
On Wed, 21 Feb 2007 14:12:04 +0000, "Nicholas Fearnley"
<[EMAIL PROTECTED]> said:
I have removed the jumper on the card that provides the amp (there is
only one jumper).
But as to whether or not the antenna still shorts I'm not sure. Can
I check with a multimeter?
I read about turning off the amp (I2C 0x65) which means little to
me! It's on the wiki.
On 21 Feb 2007, at 10:44, Jouni wrote:
What type of antenna you are using?
My TT-1500 will not get good signal, if the antenna shorts the 5V
feed
for antenna amp from
the cards antenna in -connector.
On Tue, 20 Feb 2007 23:37:06 +0000, "Nicholas Fearnley"
<[EMAIL PROTECTED]> said:
I have had real problems getting the TT-1500 (DVB-T) working.
I have been using dvbtune for some diagnostics.
The following should yield BBC Multiplex on my local transmitter
dvbtune -c 0 -qam 16 -gi 32 -cr 3_4 -bw 8 -tm 2 -f 722000
It does not, I tried adding 166Khz (722166) but no luck. So I
tried
just working my way through some frequencies. I can get the
FE_STATUS to report FE_HAS_SIGNAL on some frequencies. I even get
FE_HAS_CARRIER on occasion but never any more than that.
Does this mean the tuner is getting *something*. It's not
random for
sure, I always get this result on the few frequencies I have tried.
I am using 2.6.18.1. I know the signal (antenna) to be OK as I get
no issues with a CX based DVB-T module, on any frequency I pick.
This has to be a driver or settings issue. I compile the relevant
modules into the kernel, I get valid firmware loads in dmesg
(version
20).
I can insert relevant debugging code if needed - if anyone has any
ideas what might help. I can send a TT unit out if anyone needs
one
to test with.
Nick
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