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| author | Tom Tsou <tom.tsou@ettus.com> | 2015-06-17 17:44:42 -0700 |
|---|---|---|
| committer | Martin Braun <martin.braun@ettus.com> | 2015-07-13 14:59:16 -0700 |
| commit | 3c5b4b5f9f3db6a3c1327d1d583a28f55fa09a1d (patch) | |
| tree | 098c351e99ad20a7d3e1033eebdba99863bc3847 | |
| parent | 2b837f2ff7e9836dc4114791308bf2c9a37b807c (diff) | |
| download | uhd-3c5b4b5f9f3db6a3c1327d1d583a28f55fa09a1d.tar.gz uhd-3c5b4b5f9f3db6a3c1327d1d583a28f55fa09a1d.tar.bz2 uhd-3c5b4b5f9f3db6a3c1327d1d583a28f55fa09a1d.zip | |
ad9361: Prevent positive loop gain on Rx quadrature tracking
Patch fixes a portion of #807
"B210: severe distortion on In-phase data for some gain settings"
ADI recommends that the "Prevent Pos Loop Gain" setting be enabled to
prevent the Rx quadrature tracking loop from becoming unstable at low
power levels. ADI Linux kernel driver also reflects this setting.
We do not follow the ADI recommendation. Adjust accordingly.
Signed-off-by: Tom Tsou <tom.tsou@ettus.com>
| -rw-r--r-- | host/lib/usrp/common/ad9361_driver/ad9361_device.cpp | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/host/lib/usrp/common/ad9361_driver/ad9361_device.cpp b/host/lib/usrp/common/ad9361_driver/ad9361_device.cpp index c374780f7..19b6242ff 100644 --- a/host/lib/usrp/common/ad9361_driver/ad9361_device.cpp +++ b/host/lib/usrp/common/ad9361_driver/ad9361_device.cpp @@ -783,7 +783,7 @@ void ad9361_device_t::_calibrate_rx_quadrature() _io_iface->poke8(0x168, 0x03); // Set tone level for cal _io_iface->poke8(0x16e, 0x25); // RX Gain index to use for cal _io_iface->poke8(0x16a, 0x75); // Set Kexp phase - _io_iface->poke8(0x16b, 0x15); // Set Kexp amplitude + _io_iface->poke8(0x16b, 0x95); // Set Kexp amplitude if(_use_iq_balance_correction) { |