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| author | Tom Tsou <tom.tsou@ettus.com> | 2015-06-30 12:27:43 -0700 |
|---|---|---|
| committer | Martin Braun <martin.braun@ettus.com> | 2015-08-13 14:37:42 -0700 |
| commit | 2e4138d82a4ad33183a6cbff868b9e6c0d82f239 (patch) | |
| tree | 08e3752c60f63521d3777c54c4fd7d1cc948283d /firmware | |
| parent | 55d792f85fae26b51e059cca5e5a62807f4b3fcf (diff) | |
| download | uhd-2e4138d82a4ad33183a6cbff868b9e6c0d82f239.tar.gz uhd-2e4138d82a4ad33183a6cbff868b9e6c0d82f239.tar.bz2 uhd-2e4138d82a4ad33183a6cbff868b9e6c0d82f239.zip | |
ad9361: Delay Tx Quad Cal from initialization to streamer start
Patch addresses issue:
#742 "tx_waveforms seems to produce unexpectedly large image"
Tx Quad Cal performance is temporally dependent with better results
when run after the AD9361 is configured for transmission than at
initialization. This gets is roughly 5-10 dB of additional quadrature
image suppression.
Even better performance can be reached when Tx Quad Cal is run
after streaming and the AD9361 is actively transmitting. Calibration
in this state, however, requires user intervention by retuning the
transmit chain by > 100 MHz. Total IQ suppression should be in the
range of 40-50+ dBFS dependent on operating frequency.
Signed-off-by: Tom Tsou <tom.tsou@ettus.com>
Diffstat (limited to 'firmware')
0 files changed, 0 insertions, 0 deletions