EXFO FTB-7000 OTDR for FTB-200 v2 - Manual (Page 77)

Testing Fibers in Template Mode
OTDR 63
Restrictions of Template Mode
When you process traces using an OTDR, you acquire the traces as you go
along. When you process traces on a computer, you use traces stored on
disk; therefore, applying the span length is optional.
Item To be valid...
Pulse width
³
Must be:
OR
Pulse width
³
This would also be valid:
OR
Fiber types Compare singlemode traces with singlemode traces.
Compare multimode traces with multimode traces.
Number of
events
Traces must have at least two events (span start and span end) and a
fiber section.
Acquisition
mode
Reference trace must not be acquired in Real mode (see Setting Distance
Range, Pulse Width, and Acquisition Time on page 45).
Wavelengths Reference wavelengths and wavelengths of subsequent (or reloaded)
traces must be identical.
Reference trace pulse
4
---------------------------------------------------
⎝ ⎠
⎛ ⎞ Current trace pulse
≤
Reference trace pulse
Current trace pulse
Current trace pulse Reference trace pulse ( 4 ) × ≤ Reference trace pulse Current trace pulse
Current trace pulse
4
------------------------------------------------
⎝ ⎠
⎛ ⎞ Reference trace pulse
≤ Reference trace pulse
Current trace pulse
Reference trace pulse Current trace pulse ( 4 ) × ≤ Reference trace pulse Current trace pulse