TB 9-6625-2309-24
m. Record this: A = T+ value in nanoseconds (ns) and use this A = T+ value as
"Equivalent Delay" in calculations below.
n. Compute calculations below:
TID= 2 (TOF) - EQUIVALENT DELAY + 2.5 ns
NOTE
TID = Time insertion delay in ns for a given FOCUS unit/wavelength
TOF = Time of Flight in ns of Fiber Optic Test Box and 2 meter fiber
optic jumper cable for a given wavelength from test report
EQUIVAL DELAY = A = T+ value recorded from m above
2.5 ns = Correction factor to minimize data point sampling error in this
procedure
13. Final Procedure
a. Deenergize and disconnect all equipment.
b. Annotate and affix DA label/form in accordance with TB 750-25.