From: Antti Palosaari <crope@iki.fi>
To: linux-media <linux-media@vger.kernel.org>
Subject: comments for DVB LNA API
Date: Tue, 10 Jul 2012 19:20:14 +0300 [thread overview]
Message-ID: <4FFC563E.4070501@iki.fi> (raw)
I am looking how to implement LNA support for the DVB API.
What we need to be configurable at least is: OFF, ON, AUTO.
There is LNAs that support variable gain and likely those will be sooner
or later. Actually I think there is already LNAs integrated to the
RF-tuner that offers adjustable gain. Also looking to NXP catalog and
you will see there is digital TV LNAs with adjustable gain.
Coming from that requirements are:
adjustable gain 0-xxx dB
LNA OFF
LNA ON
LNA AUTO
Setting LNA is easy but how to query capabilities of supported LNA
values? eg. this device has LNA which supports Gain=5dB, Gain=8dB, LNA auto?
LNA ON (bypass) could be replaced with Gain=0 and LNA ON with Gain>0,
Gain=-1 is for auto example.
regards
Antti
--
http://palosaari.fi/
next reply other threads:[~2012-07-10 16:20 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-07-10 16:20 Antti Palosaari [this message]
[not found] <4FFC5B4E.8080903@stevekerrison.com>
2012-07-10 16:42 ` comments for DVB LNA API Steve Kerrison
2012-07-10 21:32 ` Antti Palosaari
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