diff --git a/policies/llrf_measurements.policies b/policies/llrf_measurements.policies
index 847802e..cc1f17b 100644
--- a/policies/llrf_measurements.policies
+++ b/policies/llrf_measurements.policies
@@ -67,7 +67,7 @@ Examples for ttl settings:
 /* example setting for waveforms of station SINEG01 (AMPLT / PHASE / DAC I/Q */
 /*
 {
-   "pattern":"SINEG01.*-RIQM-STA:DAC",
+   "pattern":"^SINEG01.*-RIQM-STA:DAC",
    "data_reduction":{
       "waveform":[
          {
@@ -94,7 +94,7 @@ Examples for ttl settings:
 }
 ,
 {
-   "pattern":"SINEG01.*-AMPLT$",
+   "pattern":"^SINEG01.*-AMPLT$",
    "data_reduction":{
       "waveform":[
          {
@@ -121,7 +121,7 @@ Examples for ttl settings:
 }
 ,
 {
-   "pattern":"SINEG01.*-PHASE$",
+   "pattern":"^SINEG01.*-PHASE$",
    "data_reduction":{
       "waveform":[
          {
@@ -153,7 +153,7 @@ Examples for ttl settings:
 
 /* --- SINEG01 --- */
 {
-   "pattern":"SINEG01.*-RIQM-STA:DAC",
+   "pattern":"^SINEG01.*-RIQM-STA:DAC",
    "data_reduction":{
       "waveform":[
          {
@@ -180,7 +180,7 @@ Examples for ttl settings:
 }
 ,
 {
-   "pattern":"SINEG01.*-AMPLT$",
+   "pattern":"^SINEG01.*-AMPLT$",
    "data_reduction":{
       "waveform":[
          {
@@ -207,7 +207,7 @@ Examples for ttl settings:
 }
 ,
 {
-   "pattern":"SINEG01.*-PHASE$",
+   "pattern":"^SINEG01.*-PHASE$",
    "data_reduction":{
       "waveform":[
          {
@@ -237,7 +237,7 @@ Examples for ttl settings:
 
 /* --- SINEG01 --- */
 {
-   "pattern":"S10CB01.*-RIQM-STA:DAC",
+   "pattern":"^S10CB01.*-RIQM-STA:DAC",
    "data_reduction":{
       "waveform":[
          {
@@ -264,7 +264,7 @@ Examples for ttl settings:
 }
 ,
 {
-   "pattern":"S10CB01.*-AMPLT$",
+   "pattern":"^S10CB01.*-AMPLT$",
    "data_reduction":{
       "waveform":[
          {
@@ -291,7 +291,7 @@ Examples for ttl settings:
 }
 ,
 {
-   "pattern":"S10CB01.*-PHASE$",
+   "pattern":"^S10CB01.*-PHASE$",
    "data_reduction":{
       "waveform":[
          {