Index: trunk/BNC/src/bnchelp.html
===================================================================
--- trunk/BNC/src/bnchelp.html	(revision 6838)
+++ trunk/BNC/src/bnchelp.html	(revision 6839)
@@ -154,5 +154,5 @@
 
 <p></p>
-<table border="1" frame="box" rules="rows" bgcolor="#FFF5EE" style="font-size:13">
+<table border="1" rules="rows" frame="box" bgcolor="#FFF5EE" style="font-size:13">
 
 <tr><td><b>Message<br>Type #</b></td> <td><b>Description</b></td> <td><b>System</b></td> <td><b>RTCM<br>Proposal&nbsp;</b></td> <td><b>Decoding&nbsp;</b></td> <td><b>&nbsp;RINEX/&nbsp;<br>&nbsp;SP3</b></td> <td><b>Encoding&nbsp;</b></td> <td><b>Upload&nbsp;</b></td> <td><b>&nbsp;PPP&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</b></td> <td><b>Combin.&nbsp;</b></td> </tr>
@@ -1510,8 +1510,19 @@
 <p><a name="serial"><h4>3.10. Serial Output</h4></p>
 <p>
-You may use BNC to feed a serial connected device like a GNSS receiver. For that an incoming stream can be forwarded to a serial port. The following figure shows the screenshot of an example situation where BNC pulls a VRS stream from an NTRIP Broadcaster to feed a serial connected RTK rover.
-</p>
+You may use BNC to feed a serial connected device like a GNSS receiver. For that an incoming stream can be forwarded to a serial port. Depending on the stream contents the receiver may use it for Differential GNSS, Precise Point Positioning or any other purpose supported by its firmware.
+</p>
+<p>
+Note that receiving a VRS stream requires the receiver sending NMEA sentences (mode 'Manual' or 'Auto') to the Ntrip Broadcaster. The following figure shows the data flow when pulling a VRS stream or a none VRS stream.
+</p>
+
+<p><img src="IMG/screenshot35.png"/></p>
+<p><u>Figure 15:</u> Flowcharts, BNC forwarding a stream to a serial connected receiver; sending NMEA sentences is mandatory for VRS stream.</p>
+
+<p>
+The following figure shows the screenshot of an example situation where BNC pulls a VRS stream from an NTRIP Broadcaster to feed a serial connected RTK rover.
+</p>
+
 <p><img src="IMG/screenshot11.png"/></p>
-<p><u>Figure 15:</u> BNC pulling a VRS stream to feed a serial connected RTK rover.</p>
+<p><u>Figure 16:</u> BNC pulling a VRS stream to feed a serial connected RTK rover.</p>
 
 <p><a name="sermount"><h4>3.10.1 Mountpoint - optional</h4></p>
@@ -1665,5 +1676,5 @@
 </p>
 <p><img src="IMG/screenshot14.png"/></p>
-<p><u>Figure 16:</u> RTCM message numbers, latencies and observation types.</p>
+<p><u>Figure 17:</u> RTCM message numbers, latencies and observation types.</p>
 
 
@@ -1761,8 +1772,8 @@
 
 <p><img src="IMG/screenshot03.png"/></p>
-<p><u>Figure 17:</u> Precise Point Positioning with BNC, PPP Panel 1.</p>
+<p><u>Figure 18:</u> Precise Point Positioning with BNC, PPP Panel 1.</p>
 
 <p><img src="IMG/screenshot18.png"/></p>
-<p><u>Figure 18:</u> Precise Point Positioning with BNC, PPP Panel 2.</p>
+<p><u>Figure 19:</u> Precise Point Positioning with BNC, PPP Panel 2.</p>
 
 <p>
@@ -2060,8 +2071,8 @@
 
 <p><img src="IMG/screenshot17.png"/></p>
-<p><u>Figure 19:</u> BNC in 'Quick-Start' mode (PPP, Panel 1)</p>
+<p><u>Figure 20:</u> BNC in 'Quick-Start' mode (PPP, Panel 1)</p>
 
 <p><img src="IMG/screenshot22.png"/></p>
-<p><u>Figure 20:</u> BNC in 'Quick-Start' mode (PPP, Panel 2)</p>
+<p><u>Figure 21:</u> BNC in 'Quick-Start' mode (PPP, Panel 2)</p>
 
 <p><a name="pppgap"><h4>3.13.7.8 Maximal Solution Gap - optional if Quick-Start is set</h4></p>
@@ -2141,5 +2152,5 @@
 <br>
 <p><img src="IMG/screenshot32.png"/></p>
-<p><u>Figure 21:</u> Track of positions from BNC with Google Maps in the background.</p>
+<p><u>Figure 22:</u> Track of positions from BNC with Google Maps in the background.</p>
 
 <p><a name="pppmap"><h4>3.13.10.1 Open Map - optional</h4></p>
@@ -2256,11 +2267,11 @@
 <br>
 <p><img src="IMG/screenshot20.png"/></p>
-<p><u>Figure 22:</u> BNC combining Broadcast Correction streams.</p>
+<p><u>Figure 23:</u> BNC combining Broadcast Correction streams.</p>
 <p><br></p>
 <p><img src="IMG/screenshot21.png"/></p>
-<p><u>Figure 23:</u> BNC uploading the combined Broadcast Corrections stream.</p>
+<p><u>Figure 24:</u> BNC uploading the combined Broadcast Corrections stream.</p>
 <p></p>
 <p><img src="IMG/screenshot23.png"/></p>
-<p><u>Figure 24:</u> 'INTERNAL' PPP with BNC using combined Broadcast Corrections stream.</p>
+<p><u>Figure 25:</u> 'INTERNAL' PPP with BNC using combined Broadcast Corrections stream.</p>
 
 <p><a name="combimethod"><h4>3.13.1.2 Method - mandatory if 'Combine Corrections' table is populated</h4></p>
@@ -2656,5 +2667,5 @@
 </p>
 <p><img src="IMG/screenshot26.png"/></p>
-<p><u>Figure 25:</u> Producing Broadcast Corrections from incoming precise orbits and clocks and uploading them to an NTRIP Broadcaster.</p>
+<p><u>Figure 26:</u> Producing Broadcast Corrections from incoming precise orbits and clocks and uploading them to an NTRIP Broadcaster.</p>
 
 <p><a name="upeph"><h4>3.16. Upload Ephemeris</h4></p>
@@ -2683,5 +2694,5 @@
 
 <p><img src="IMG/screenshot28.png"/></p>
-<p><u>Figure 26:</u> Producing a Broadcast Ephemeris stream from navigation messages of globally distributed RTCM streams and uploading them in RTCM Version 3 format to an NTRIP Broadcaster.</p>
+<p><u>Figure 27:</u> Producing a Broadcast Ephemeris stream from navigation messages of globally distributed RTCM streams and uploading them in RTCM Version 3 format to an NTRIP Broadcaster.</p>
 
 <p><a name="streams"><h4>3.17. Streams</h4></p>
@@ -2750,5 +2761,5 @@
 
 <p><img src="IMG/screenshot08.png"/></p>
-<p><u>Figure 27:</u> Bandwidth consumption of incoming streams.</p>
+<p><u>Figure 28:</u> Bandwidth consumption of incoming streams.</p>
 
 <p><a name="latency"><h4>3.18.3 Latency</h4></p>
@@ -2758,5 +2769,5 @@
 
 <p><img src="IMG/screenshot07.png"/></p>
-<p><u>Figure 28:</u> Latency of incoming streams.</p>
+<p><u>Figure 29:</u> Latency of incoming streams.</p>
 
 <p><a name="ppptab"><h4>3.18.4 PPP Plot</h4></p>
@@ -2766,5 +2777,5 @@
 
 <p><img src="IMG/screenshot13.png"/></p>
-<p><u>Figure 29:</u> Time series plot of PPP session.</p>
+<p><u>Figure 30:</u> Time series plot of PPP session.</p>
 
 <p><a name="bottom"><h4>3.19. Bottom Menu Bar</h4></p>
@@ -2774,5 +2785,5 @@
 
 <p><img src="IMG/screenshot06.png"/></p>
-<p><u>Figure 30:</u> Steam input communication links.</p>
+<p><u>Figure 31:</u> Steam input communication links.</p>
 
 <p><a name="streamadd"><h4>3.19.1 Add Stream</h4></p>
@@ -2799,5 +2810,5 @@
 <p><img src="IMG/screenshot04.png"/></p>
 
-<p><u>Figure 31:</u> Casters table.</p>
+<p><u>Figure 32:</u> Casters table.</p>
 
 <p><a name="streamuser"><h4>3.19.1.1.3 User and Password - mandatory for protected streams</h4></p>
@@ -2817,5 +2828,5 @@
 </p>
 <p><img src="IMG/screenshot05.png"/></p>
-<p><u>Figure 32:</u> Broadcaster source-table.</p>
+<p><u>Figure 33:</u> Broadcaster source-table.</p>
 
 <p><a name="ntripv"><h4>3.19.1.1.5 NTRIP Version - mandatory</h4></p>
@@ -2847,5 +2858,5 @@
 
 <p><img src="IMG/screenshot24.png"/></p>
-<p><u>Figure 33:</u> Stream distribution map derived from NTRIP Broadcaster source-table.</p>
+<p><u>Figure 34:</u> Stream distribution map derived from NTRIP Broadcaster source-table.</p>
 
 <p><a name="streamip"><h4>3.19.1.2 Add Stream - Coming from TCP/IP Port</h4></p>
@@ -2921,5 +2932,5 @@
 </p>
 <p><img src="IMG/screenshot15.png"/></p>
-<p><u>Figure 34:</u> BNC setup for pulling a stream via serial port.</p>
+<p><u>Figure 35:</u> BNC setup for pulling a stream via serial port.</p>
 
 <p><a name="streamsdelete"><h4>3.19.2 Delete Stream</h4></p>
