  parsys(n),  rate(n) )
</PRE>
   The mapping of SCLK values to PARSYS times is carried out as follows: If
   the sclk time ``clock'' satisfies
<P>
 
<PRE>
   sclk(i)  &lt;  clock  &lt;  sclk(i+1)
            -
</PRE>
   then the corresponding PARSYS time is
<P>
 
<PRE>
   parsys(i)  +    ( rate(i)/MSF )  *  ( clock - sclk(i) )
</PRE>
   If
<P>
 
<PRE>
   clock  &gt;  clock(n)
          -
</PRE>
   the formula still applies, with i = n.
<P>
 
   To convert PARSYS time values to SCLK, we use an analogous met