TwinRX: Remove decimation from frontend

The decimation in the rx_frontend_gen3 was added to reduce the bandwidth
between the Radio and the DDC due to the limitation in bandwidth over
the crossbar for dynamically connected blocks.  The default FPGA image
for the X300 now has a static connection between the Radio and DDC, so
this is no longer necessary.

This change allows the TwinRX receive channels to be time aligned with
channels from other daughterboards so they can be used in the same
streamer.

Signed-off-by: Michael West <michael.west@ettus.com>

1 files changed, 1 insertions, 4 deletions

diff --git a/host/lib/usrp/x300/x300_radio_control.cpp b/host/lib/usrp/x300/x300_radio_control.cpp
index c4cea2f8e..7c15554af 100644
--- a/host/lib/usrp/x300/x300_radio_control.cpp
+++ b/host/lib/usrp/x300/x300_radio_control.cpp
@@ -1582,10 +1582,7 @@ private:
             tx_chan++;
         }
         UHD_ASSERT_THROW(rx_chan or tx_chan);
-        const double actual_rate = rx_chan ? _rx_fe_map.at(0).core->get_output_rate()
-                                           : get_rate();
-        RFNOC_LOG_DEBUG("Actual sample rate: " << (actual_rate / 1e6) << " Msps.");
-        radio_control_impl::set_rate(actual_rate);
+        RFNOC_LOG_DEBUG("Actual sample rate: " << (get_rate() / 1e6) << " Msps.");
 
         // Initialize the daughterboards now that frontend cores and connections exist
         _db_manager->initialize_dboards();