anchor.diff:  
   ==== Tutorial: Simple Interleave streams
   
  -*Goal*:: Demonstrate number of interleave streams
  +*Goal*:: Demonstrate interleaving of multiple streams
   
   The following example demonstrates 3 streams with different rates (pps=10,20,40) and different start time ISG (0,25msec,50msec)
   
  
positive.code:                             ]).get_streams()
  
  ----
  <1> Stream S0 wait 10 usec(isg) and send burst of 10 packet in 10 PPS rate
  <2> Multi burst of 5 bursts of 4 packets with a inter burst gap of one second 
   
  
  image::images/stl_tut_4.png[title="Streams example",align="left",width={p_width}, link="images/stl_tut_4.png"]
  
negative.code:         pad = max(0, size - len(base_pkt)) * 'x'
  
  
          return STLProfile( [ STLStream( isg = 10.0, # start in delay                                       <1>
                                          name    ='S0',
                                          packet = STLPktBuilder(pkt = base_pkt/pad),
                                          mode = STLTXSingleBurst( pps = 10, total_pkts = 10),
                                          next = 'S1'), # point to next stream 
  
                               STLStream( self_start = False, # stream is disabled. Enabled by S0        <2>
                                          name    ='S1',
                                          packet  = STLPktBuilder(pkt = base_pkt1/pad),
                                          mode    = STLTXMultiBurst( pps = 1000,
  