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Transmit Data & Transmit Clock Wave forms
Installation & Troubleshooting
A. Identify your equipment as DCE or DTE. TC1504's DTE/DCE DIP Switch has to be set to the opposite
of your equipment. For example, if you connect the TC1504 to a DTE device, set the DCE/DTE DIP
Switch (SW4) to the DCE (up) position.
B . Always connect one TC1504 and conduct a Local Optic Loopback test first. To perform the test:
1. Use a short optic cable to loop from optic "Tx" back to optic "Rx."
2. Connect the TC1504 to the user's equipment.
3. Check if the "Sync" LED is lit.
4. If the "Sync" LED is off, try sliding the DCE/DTE switch down or verify the fiber cable and
connections, then re-examine the "Sync" LED.
5. The TC1504 requires a "clock" input signal (pins 17 & 35 when set as DCE) to latch onto incoming
data; without a valid clock signal, no valid optic signal will be generated.
−5−
TC1504 User's Manual
Rev. 1.5 (A0.1)
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