GR-扫描包装说明
GR-扫描是用C ++编写，并在GNU收音机，RTL-SDR，并且OsmoSDR源块内置的程序。它的目的是扫描一个频率范围，并打印发现信号的列表。它应该与任何与该块，其中包括瑞昱RTL2832U设备工程设备。该软件是使用康博U620F，其使用E4000调谐器开发的。该产品似乎并没有提供在美国的网站，但新天DVB-T接收器（RTL2832U / E4000设备）有很好的评价。
资料来源：http://www.techmeology.co.uk/gr-scan/
GR-扫描首页 | 卡利GR-扫描回购
- 作者：尼古拉斯·汤姆林森
- 许可：GPLv3的
包含在GR-扫描包工具
克扫描 - 扫描一个频率范围，并打印发现信号的列表
[email protected]:~# gr-scan --help
linux; GNU C++ version 4.7.2; Boost_104900; UHD_003.005.003-0-unknown
Usage: gr-scan [OPTION...]
-a, --average=COUNT Average over COUNT samples
-c, --coarse-bandwidth=FREQ Bandwidth of the coarse window in kHz
-f, --fine-bandwidth=FREQ Bandwidth of the fine window in kHz
-p, --time=TIME Time in seconds to scan on each frequency
-r, --sample-rate=RATE Samplerate in Msamples/s
-s, --spread=FREQ Minimum frequency between detected signals
-t, --threshold=POWER Threshold for the difference between the coarse
and fine filtered signals in dB
-w, --fft-width=COUNT Width of FFT in samples
-x, --start-frequency=FREQ Start frequency in MHz
-y, --end-frequency=FREQ End frequency in MHz
-z, --step=FREQ Increment step in MHz
-?, --help Give this help list
--usage Give a short usage message
-V, --version Print program version
Mandatory or optional arguments to long options are also mandatory or optional
for any corresponding short options.
Report bugs to [email protected]GR-扫描用法示例
开始扫描频率为100 MHz（-x 100），并结束在105兆赫（-y 105），暂停5秒每个通道（-P 5）：
[email protected]:~# gr-scan -x 100 -y 105 -p 5
linux; GNU C++ version 4.7.2; Boost_104900; UHD_003.005.003-0-unknown
gr-osmosdr v0.0.x-xxx-xunknown (0.0.3git) gnuradio 3.6.5.1
built-in source types: file fcd rtl rtl_tcp uhd hackrf
Using device #0 Realtek RTL2838UHIDIR SN: 00000001
Found Rafael Micro R820T tuner
Using Volk machine: avx_64_mmx_orc
Exact sample rate is: 2000000.052982 Hz
gr_buffer::allocate_buffer: warning: tried to allocate
4 items of size 16000. Due to alignment requirements
32 were allocated. If this isn't OK, consider padding
your structure to a power-of-two bytes.
On this platform, our allocation granularity is 4096 bytes.
gr_buffer::allocate_buffer: warning: tried to allocate
16 items of size 8000. Due to alignment requirements
64 were allocated. If this isn't OK, consider padding
your structure to a power-of-two bytes.
On this platform, our allocation granularity is 4096 bytes.
gr_buffer::allocate_buffer: warning: tried to allocate
8 items of size 8000. Due to alignment requirements
64 were allocated. If this isn't OK, consider padding
your structure to a power-of-two bytes.
On this platform, our allocation granularity is 4096 bytes.
gr_buffer::allocate_buffer: warning: tried to allocate
8 items of size 8000. Due to alignment requirements
64 were allocated. If this isn't OK, consider padding
your structure to a power-of-two bytes.
On this platform, our allocation granularity is 4096 bytes.
00:00:01: Finished scanning 99.000000 MHz - 101.000000 MHz
[+] 00:00:01: Found signal: at 100.298500 MHz of width 63.000000 kHz, peak power -62.707417 dB (difference 8.297215 dB)
00:00:02: Finished scanning 99.000000 MHz - 101.000000 MHz
[+] 00:00:02: Found signal: at 99.299500 MHz of width 115.000000 kHz, peak power -74.849541 dB (difference 3.358849 dB)
00:00:03: Finished scanning 99.000000 MHz - 101.000000 MHz