diff --git a/liblms7002m.c b/liblms7002m.c
index 47c2cd4..018a946 100644
--- a/liblms7002m.c
+++ b/liblms7002m.c
@@ -1295,6 +1295,8 @@ int lms7_rbb_set_lpfx_bandwidth(struct lms7_state* st, unsigned bw)
 int lms7_rbb_set_bandwidth(struct lms7_state* st, unsigned bw)
 {
 	int res;
+	if (bw < 100000)
+		bw = 100000;
 
 	int cfb_tia_rfe = (int)(1680000000U/bw - 10);
 	int ccomp_tia_rfe = cfb_tia_rfe/100;
@@ -1349,6 +1351,14 @@ int lms7_rbb_set_pga(struct lms7_state* st, unsigned gain)
 	return lms7_spi_post(st, REG_COUNT(regs), regs);
 }
 
+int lms7_rbb_set_ext(struct lms7_state* st)
+{
+	uint32_t regs[] = {
+		MAKE_LMS7002_0x0119(1, 20, 20, 1)
+	};
+	return lms7_spi_post(st, REG_COUNT(regs), regs);
+}
+
 
 /************************************************************************
  * AFE configuration
diff --git a/liblms7002m.h b/liblms7002m.h
index 00b6989..4bc07a9 100644
--- a/liblms7002m.h
+++ b/liblms7002m.h
@@ -163,6 +163,7 @@ int lms7_rbb_disable(struct lms7_state* st);
 int lms7_rbb_set_path(struct lms7_state* st, enum rbb_path path);
 int lms7_rbb_set_pga(struct lms7_state* st, unsigned gain);
 int lms7_rbb_set_bandwidth(struct lms7_state* st, unsigned bw);
+int lms7_rbb_set_ext(struct lms7_state* st);
 
 // AFE functions
 int lms7_afe_ctrl(struct lms7_state* st, bool rxa, bool rxb, bool txa, bool txb);