16 Jan
2014
16 Jan
'14
10:57 a.m.
Hi,
I would like to use my E4k dongle for wider spectrum analysis. Currently
the tuner is very specific to a frequency. Is there a way to widen its
bandpass filter?
I have noticed some filters in src/tuner_e4k.c: Mixer filter, IF RC filter
and IF channel filter. Are they of any use?
Is there a librtlsdr API?
TIA,
Nikos
16 Jan
16 Jan
4:20 p.m.
i want to write an android app with the Realtek DVB-T Dongles ，is there any librtlsdr API
for android?
------------------ Original ------------------
From: "Nikos Balkanas";<nikos.balkanas(a)eyeonix.com>nix.com>;
Date: Thu, Jan 16, 2014 05:57 PM
To: "osmocom-sdr"<osmocom-sdr(a)lists.osmocom.org>.osmocom.org>;
Subject: Elonics 4000 bandpass
Hi,
I would like to use my E4k dongle for wider spectrum analysis. Currently the tuner is very
specific to a frequency. Is there a way to widen its bandpass filter?
I have noticed some filters in src/tuner_e4k.c: Mixer filter, IF RC filter and IF channel
filter. Are they of any use?
Is there a librtlsdr API?
TIA,
Nikos
4:50 p.m.
393775602 wrote:
i want to write an android app with the Realtek DVB-T
Dongles ，
is there any librtlsdr API for android?
A dongle could be connected to an Android device with USB host
functionality but the Dalvik app must help open the device, libusb
is unable to do that on its own. The current version of libusb
doesn't have provisions for this, but a future version will. That
function would then have to be passed through by librtlsdr as well.
At the moment I think the answer is no.
//Peter
4:56 p.m.
Hi,
i want to write an android app with the Realtek DVB-T
Dongles<http://wiki.spench.net/wiki/RTL2832U> ，is
there any librtlsdr API for android?
What about these?
https://play.google.com/store/apps/details?id=marto.rtl_tcp_andro
https://github.com/keesj/android-rtlsdr
https://github.com/keesj/librtlsdr-android
Regards,
Andras, HA7ILM
5:39 p.m.
András Retzler wrote:
What about these?
https://github.com/keesj/librtlsdr-android
This includes a hacked up patch for an older libusb version to get
that help from the Dalvik app with device opening.
If you must proceed to use that code today then do yourself a favor
and at least forward-port that patch to current git.libusb.org/libusb.git
//Peter
18 Jan
18 Jan
4:42 p.m.
New subject: 回复： Elonics 4000 bandpass
thanks to all of u,i have start the rtl_tcp and see the log like:
rtl_tcp -a 127.0.0.1 -p 14423 -f 91800000 -s 1024000
Found 1 device(s).
Found Fitipower FC0013 tuner
Using Terratec NOXON DAB/DAB+ USB dongle (rev 1)
Tuned to 91800000 Hz.
listening...
Use the device argument 'rtl_tcp=127.0.0.1:14423' in OsmoSDR (gr-osmosdr) source
to receive samples in GRC and control rtl_tcp parameters (frequency, gain, ...).
my question now is what should i do next?where should i type command
rtl_tcp=127.0.0.1:14423
to get the fft specturm data?
------------------ 原始邮件 ------------------
发件人: "András Retzle";<retzlerandras(a)gmail.com>ail.com>;
发送时间: 2014年1月16日(星期四) 晚上11:56
收件人: ""<393775602(a)qq.com>75602@qq.com>;
抄送: "osmocom-sdr"<osmocom-sdr(a)lists.osmocom.org>.osmocom.org>;
主题: Re: Elonics 4000 bandpass
Hi,
i want to write an android app with the Realtek DVB-T Dongles ，is there any librtlsdr API
for android?
What about these?
https://play.google.com/store/apps/details?id=marto.rtl_tcp_andro
https://github.com/keesj/android-rtlsdr
https://github.com/keesj/librtlsdr-android
Regards,
Andras, HA7ILM
5:36 p.m.
New subject: 回复： Elonics 4000 bandpass
Hi,
You can type this to a gr-osmosdr block in GNU Radio. I doubt that GNU
Radio would be easy to compile on Android.
If you want to write your own client that processes I/Q data, you should
look at rtl_tcp source
code<http://cgit.osmocom.org/rtl-sdr/tree/src/rtl_tcp.c>.c>,
it's quite self-documenting.
Anyway, some key points: if you open a TCP connection to the rtl_tcp
server, it immediately starts to send you the 8-bit I/Q samples acquired
from the dongle. Every odd byte is an I, every even byte is a Q sample.
You can control rtl_tcp with five byte commands. Look for "switch(cmd.cmd)"
and "struct command" in the source code.
When your client connects, it also gets 12 bytes with the dongle identifier
at the beginning of the stream, but it can be ignored. Look for "
dongle_info_t" if interested.
You will need to process the I/Q data yourself and calculate FFT to draw
the waterfall.
Regards,
Andras, HA7ILM
2014/1/18 393775602 <393775602(a)qq.com>
thanks to all of u,i have start the rtl_tcp and see
the log like:
rtl_tcp -a 127.0.0.1 -p 14423 -f 91800000 -s 1024000
Found 1 device(s).
Found Fitipower FC0013 tuner
Using Terratec NOXON DAB/DAB+ USB dongle (rev 1)
Tuned to 91800000 Hz.
listening...
Use the device argument 'rtl_tcp=127.0.0.1:14423' in OsmoSDR (gr-osmosdr)
source
to receive samples in GRC and control rtl_tcp parameters (frequency,
gain, ...).
my question now is what should i do next?where should i type command
rtl_tcp=127.0.0.1:14423
to get the fft specturm data?
------------------ 原始邮件 ------------------
*发件人:* "András Retzle";<retzlerandras(a)gmail.com>ail.com>;
*发送时间:* 2014年1月16日(星期四) 晚上11:56
*收件人:* ""<393775602(a)qq.com>75602@qq.com>;
*抄送:* "osmocom-sdr"<osmocom-sdr(a)lists.osmocom.org>.osmocom.org>;
*主题:* Re: Elonics 4000 bandpass
Hi,
i want to write an android app with the Realtek DVB-T
Dongles<http://wiki.spench.net/wiki/RTL2832U> ，is
there any librtlsdr API for android?
What about these?
https://play.google.com/store/apps/details?id=marto.rtl_tcp_andro
https://github.com/keesj/android-rtlsdr
https://github.com/keesj/librtlsdr-android
Regards,
Andras, HA7ILM
3758
days inactive
3760
days old
6 comments
4 participants
participants (4)
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393775602 -
András Retzler -
Nikos Balkanas -
Peter Stuge