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small fixes

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Carles Fernandez
2015-10-17 18:35:59 +02:00
parent 1905880652
commit 8f3a509a00
1 changed files with 2 additions and 2 deletions
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@@ -637,6 +637,7 @@ In this latter case, you will need to convert the interleaved I/Q samples to a c
***Example: Two-bit packed file source*** ***Example: Two-bit packed file source***
Sometimes, samples are stored in files with a format which is not in the list of _native_ types supported by the ```File_Signal_Source``` implementation (i.e, it is not among ```byte```, ```ibyte```, ```short```, ```ishort```, ```float``` or ```gr_complex```). This is the case of 2-bit samples, which is a common format delivered by GNSS RF front-ends. The ```Two_Bit_Packed_File_Signal_Source``` implementation allows reading two-bit length samples from a file. The data is assumed to be packed as bytes ```item_type=byte``` or shorts ```item_type=short``` so that there are 4 two bit samples in each byte. The two bit values are assumed to have the following interpretation: Sometimes, samples are stored in files with a format which is not in the list of _native_ types supported by the ```File_Signal_Source``` implementation (i.e, it is not among ```byte```, ```ibyte```, ```short```, ```ishort```, ```float``` or ```gr_complex```). This is the case of 2-bit samples, which is a common format delivered by GNSS RF front-ends. The ```Two_Bit_Packed_File_Signal_Source``` implementation allows reading two-bit length samples from a file. The data is assumed to be packed as bytes ```item_type=byte``` or shorts ```item_type=short``` so that there are 4 two bit samples in each byte. The two bit values are assumed to have the following interpretation:
@@ -718,7 +719,7 @@ SignalSource.dump1=false
***Example: OsmoSDR-compatible Signal Source*** ***Example: OsmoSDR-compatible Signal Source***
{OsmoSDR](http://sdr.osmocom.org/trac/) is a small form-factor, inexpensive software defined radio project. It provides a driver for several front-ends, such as [RTL-based dongles](http://sdr.osmocom.org/trac/wiki/rtl-sdr), HackRF, bladeRF, etc. Note that not all the OsmoSDR-compatible devices can work as radio frequency front-ends for proper GNSS signal reception, please check the specifications. [OsmoSDR](http://sdr.osmocom.org/trac) is a small form-factor, inexpensive software defined radio project. It provides a driver for several front-ends, such as [RTL-based dongles](http://sdr.osmocom.org/trac/wiki/rtl-sdr), HackRF, bladeRF, etc. Note that not all the OsmoSDR-compatible devices can work as radio frequency front-ends for proper GNSS signal reception, please check the specifications. For suitable RF front-ends, you can use:
~~~~~~ ~~~~~~
;######### SIGNAL_SOURCE CONFIG ############ ;######### SIGNAL_SOURCE CONFIG ############
@@ -726,7 +727,6 @@ SignalSource.implementation=Osmosdr_Signal_Source
SignalSource.item_type=gr_complex SignalSource.item_type=gr_complex
SignalSource.sampling_frequency=2000000 SignalSource.sampling_frequency=2000000
SignalSource.freq=1575420000 SignalSource.freq=1575420000
SignalSource.gain=40
SignalSource.rf_gain=40 SignalSource.rf_gain=40
SignalSource.if_gain=30 SignalSource.if_gain=30
SignalSource.enable_throttle_control=false SignalSource.enable_throttle_control=false