Operation Manual

How to Test Your Test Reference Cords

3. Set the Reference

A-5

3. Set the Reference

3-1

Make the connections shown in Figure A-3.

3-2

Turn the rotary switch to SPECIAL FUNCTIONS, then

select Set Reference. If both a fiber module and a

twisted pair or coaxial adapter are attached, select

Fiber Module next.

3-3

Make sure that the reference value is good:

• For 50/125 µm fiber, the reference value must be

better than -24.50 dBm (for example, -23.50 dBm is

a better value)

• For 62.5/125 µm fiber, the reference value must be

better than -20.00 dBm (for example, -19.50 dBm is

a better value)

• For 9/125 µm fiber, the reference value must be

better than -8.00 dBm (for example, -7.50 dBm is a

better value)

If the value is not good, do the reference procedure

again with a different test reference cord.

amd174.eps

Figure A-3. Reference Connections

Mandrel used only for

multimode fiber tested

with the DTX-MFM2

modules.