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CHAPTER 6: Troubleshooting
Data is being transferred, but it’s all garbled.
Is the 4-wire cable connected and wired properly? Make
sure the four wires are securely connected to the proper
terminals; refer to Figure 4-1 on page 14 for end-to-end
pinning. If the wires are connected properly, check the
data-rate settings of your SHM-B Sync units and make
sure that the attached devices are set to receive clock
from them. (If your SHM-B Sync units are standalone
models, these inspections will require that you carefully
open their cases—see
Chapter 3
.)
Data is being transferred, but there are an unacceptable number
of errors.
1. Are any of the cables too long? RS-232 cables
shouldn’t be longer than 50 ft. (15.2 m); see
Appendix A
for distance guidelines for the 4-wire
twisted-pair cable.
2. Is the 4-wire cable wired properly? Make sure the
four wires are connected to the proper terminals
on your SHM-B Sync units; refer to Figure 4-1 on
page 14 for end-to-end pinning. (If your SHM-B
Sync units are standalone models, these
inspections will require that you carefully open
their cases—see
Chapter 3
.)
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