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TURBOTEST 500B User’s Guide
6 Attach the APC connector on the reference cable to the Test Port.
7 Terminate the reference cable by slowly wrapping it around the supplied mandrel until the back-
reflectance reading no longer changes. In most cases 10 wraps are sufficient.
Note:
The TURBOTEST 500B will accept an ORL reference between 40 and 70 dB. When measuring
optical return loss, the higher the measurement value equals less reflection. For example, a fiber
link measuring 35 dB has more reflection than a link measuring 45 dB.
8 While holding the wrap, press the [SET] soft key to save the reference values.
9 If the display reads [NOT VERIFIED] followed by two beeps, unwrap the reference cable, clean all
fiber optic connectors again and check for fiber breaks, and then repeat steps 5 - 8.
10 If the display reads [WRAP VERIFIED] followed by a beep, the reference is set. You may unwrap the
reference cable.
Note:
Do not unwrap the reference cable until after the [WRAP VERIFIED] message is displayed
followed by the beep.
Figure 4-4. Mandrel Wrap Referencing.
Mandrel
TURBOTEST
500B
APC Connector
UPC Connector
6
7
Test Port
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