diff --git a/MAC/APL/PIC/RSPDriver/src/TimestampWrite.cc b/MAC/APL/PIC/RSPDriver/src/TimestampWrite.cc
index eeabddd22d65cdfa172a0fb3e8d1b8bf1b8f22b5..ec816c2327e925fdfa8d4da5806edec217aed05d 100644
--- a/MAC/APL/PIC/RSPDriver/src/TimestampWrite.cc
+++ b/MAC/APL/PIC/RSPDriver/src/TimestampWrite.cc
@@ -53,7 +53,10 @@ void TimestampWrite::sendrequest()
 {
   EPARsrTimestampEvent ts;
     
-  ts.hdr.set(MEPHeader::RSR_TIMESTAMP_HDR, MEPHeader::DST_ALL_BLPS, MEPHeader::WRITE);
+  // send timestamp to all FPGA's (ALL BLP's and RSP)
+  // RSP uses it on CEP output
+  // BLP's use it on TBB data output via the backplane
+  ts.hdr.set(MEPHeader::RSR_TIMESTAMP_HDR, MEPHeader::DST_ALL, MEPHeader::WRITE);
   ts.timestamp = m_scheduler.getCurrentTime().sec();
   
   m_hdr = ts.hdr;