cellular-infrastructure
/
osmo-trx
mirror of https://gerrit.osmocom.org/osmo-trx
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

LMSDevice: Set low-pass filters to smallest possible option 

Rx 1.4 MHz, Tx 5MHz.  Both massively too wide for GSM, but there's
no smaller band-width available.

Change-Id: I9723c9a2ea77f65bfa9d796d7c44adc2417e89cf
This commit is contained in:
Harald Welte 2018-04-28 21:52:57 +02:00
parent a5054b398b
commit ea8be22e50
1 changed files with 4 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
Transceiver52M/device/lms/LMSDevice.cpp
View File

@ -156,6 +156,10 @@ int LMSDevice::open(const std::string &args, int ref, bool swap_channels)
/* Perform Rx and Tx calibration */
for (i=0; i<chans; i++) {
if (LMS_SetLPFBW(m_lms_dev, LMS_CH_RX, i, 1.4001e6) < 0)
goto out_close;
if (LMS_SetLPFBW(m_lms_dev, LMS_CH_TX, i, 5e6) < 0)
goto out_close;
LOG(INFO) << "Calibrating chan " << i;
if (LMS_Calibrate(m_lms_dev, LMS_CH_RX, i, LMS_CALIBRATE_BW_HZ, 0) < 0)
goto out_close;