VeEX MTTplus-522 OSP+, User Manual, Page: 15 / 43

5.2.1 Time Domain Reflectometer (TDR)
Range : a drop down menu to set the approximate footage range
Cable : Select the Type of Cable being tested to configure the appropriate Vp value.
Vp%
: manually set the Velocity of Propagation
Gain : in units of dB, can be adjusted to magnify small events
Start/Stop : Manually Start and Stop the TDR
One/Two : One Pair Trace or Two Pair Traces
MFL/AFL : select between Manual Fault Locator (MFL) or Automatic Fault Locator (AFL), which tries to find the first fault event.
1 or 2 Markers : activate a second marker for determining Delta distance between two events.
M1/M2 Locked/Unlocked : use to lock a Marker position
Meters/Feet : choose the appropriate measurement unit.
Left and Right Arrows : for Marker control.
Impedance
: Impedance mismatch detection.
If using MFL, Manual Fault Locate Mode, first select the appropriate Distance Range, then press Start.
The test set automatically selects the appropriate pulse width setting for the selected distance range.
When using Two Pair Mode, you can select between Split Mode or Over Mode.
- Split Mode presents two separate TDR traces, with Trace One at the top half of the screen and Trace Two at the bottom half of the
screen.
- Overlay Mode superimposes the two traces into a single presentation, which can be used for troubleshooting a problem pair against a
known good pair.
5.3 RFL
The Resistance Fault Locator can determine the distance to faults not detectable by a TDR
Requires a shorting strap or Far End Device at the far end
Proper connections to the pair(s) under test is critical for the RFL measurement to be done properly. Follow the graphical setup guide
for both near end connections and far end shorting Strap connections. You can select between One Pair or Two Pair .
Two Pair should only be used if you have access to at least two known good conductors.
Once ready, press
Start
to begin the measurement.
For tips on running RFL with V-FED device at the far end, refer to section 5.6.2 . ,
The test set also supports a 'Euro RFL' mode, which is for customers based in Europe, and uses a different connection setup.
MTTplus-_Test_Module Page 16 of 44