From ea8be22e5031d9d160a6f8b4e3e2133476b03d7d Mon Sep 17 00:00:00 2001
From: Harald Welte <laforge@gnumonks.org>
Date: Sat, 28 Apr 2018 21:52:57 +0200
Subject: 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
---
 Transceiver52M/device/lms/LMSDevice.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Transceiver52M/device/lms/LMSDevice.cpp b/Transceiver52M/device/lms/LMSDevice.cpp
index c131aea..3b2ce5e 100644
--- a/Transceiver52M/device/lms/LMSDevice.cpp
+++ b/Transceiver52M/device/lms/LMSDevice.cpp
@@ -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;
-- 
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