| Commit message (Collapse) | Author | Age | Files | Lines |
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If you run
tx_waveforms --power -20 [other args]
it will try to set the out power to -20 dBm. The signal amplitude is
factored in, so changing --ampl will not change the actual TX power
unless it causes clipping, or becomes too low.
If the USRP does not support setting a power, the program will terminate
early. If it does support setting a power, but can't reach the requested
power, it will coerce, and print the actual, available power.
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The existing implementation would create a real signal for any type of
signal (CONST, RAMP, SQUARE, and SINE), and then create the complex
signal by simply delaying the Q value by a 90 degree phase. This had
surprising results for all waveforms:
- CONST waveforms would have a baseband value of ampl + j ampl, thus
increasing the output power by 3 dB vs. what one would expect when
setting an amplitude. It is now ampl + j * 0, and the power is
ampl**2. This now makes the power consistent with SINE, which it was
not, even though a const signal is a sine signal with a frequency of
zero.
- SQUARE waveforms would phase-delay the Q part, thus resulting in three
power output levels (when both phases are zero, when both phases are
ampl, and when one of them is zero and other is ampl). However, the
square signal is useful for watching it in the scope, and there, it
helps if the power is predictably either high or low within the
selected frequency. The Q value is now always zero.
- RAMP waveforms had the same issue and were also resolved by setting
Q to zero.
- SINE signals were fine, although the implementation used sin + j cos
to calculate a complex sine, not cos + j sin according to Euler's
formula.
To make this wavetable more useful with absolute power settings, the
changes mentioned above were implemented. The dBFs power of CONST and
SINE can now be calculated by using ampl**2, SQUARE by using
(ampl**2)/2, and RAMP by solving the integral over a ramp from -1 to 1.
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Note: template_lvbitx.{cpp,hpp} need to be excluded from the list of
files that clang-format gets applied against.
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Small changes to remove various compiler warnings found in MSVC
- Adding uhd::narrow_cast to verious spots
- wavetable.hpp: all floats literals in the wavetable.
- paths_test: unnecessary character escape
- replay example: remove unreferenced noc_id
- adfXXXX: Fixing qualifiers to match between parent and derived
classes
- rpc, block_id: Removing unused name in try...catch
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Applying formatting changes to all .cpp and .hpp files in the following
directories:
```
find host/examples/ -iname *.hpp -o -iname *.cpp | \
xargs clang-format -i -style=file
find host/tests/ -iname *.hpp -o -iname *.cpp | \
xargs clang-format -i -style=file
find host/lib/usrp/dboard/neon/ -iname *.hpp -o -iname *.cpp | \
xargs clang-format -i -style=file
find host/lib/usrp/dboard/magnesium/ -iname *.hpp -o -iname *.cpp | \
xargs clang-format -i -style=file
find host/lib/usrp/device3/ -iname *.hpp -o -iname *.cpp | \
xargs clang-format -i -style=file
find host/lib/usrp/mpmd/ -iname *.hpp -o -iname *.cpp | \
xargs clang-format -i -style=file
find host/lib/usrp/x300/ -iname *.hpp -o -iname *.cpp | \
xargs clang-format -i -style=file
find host/utils/ -iname *.hpp -o -iname *.cpp | \
xargs clang-format -i -style=file
find mpm/ -iname *.hpp -o -iname *.cpp | \
xargs clang-format -i -style=file
```
Also formatted host/include/, except Cpp03 was used as a the language
standard instead of Cpp11.
```
sed -i 's/ Cpp11/ Cpp03/g' .clang-format
find host/include/ -iname *.hpp -o -iname *.cpp | \
xargs clang-format -i -style=file
```
Formatting style was designated by the .clang-format file.
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All warnings reported by MSVC. Mostly related to narrowing conversions.
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All copyright is now attributed to "Ettus Research, a National
Instruments company".
SPDX headers were also updated to latest version 3.0.
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