corrections were made to a UUT which previously failed the Excessive Loading
Verification test.
If it is determined through a comparison of the UUT's expected and observed error
rates that the UUT cannot reliably receive packets attenuated by at least 72dB
(66dB for the secondary frequency), then check the following:
• If the UUT includes a switching power supply, ensure that the power supply
noise masks of Chapter 5 have been met.
• Compare the values of the coupling circuit components with those recommended
in Chapter 4. It is possible that the wrong value component was inserted and
partial, if compromised, receive performance was still possible.
• Re-verify the Unintentional Output Noise Verification test earlier in this
chapter.
• Re-verify the receive mode impedance of the UUT by repeating the Excessive
Loading Verification Test earlier in this chapter.
Refer to the node checklist in Appendix B for more information about verifying the
UUT's design.
L
ON
W
ORKS
PLT-22 Transceiver User’s Guide
7-17
Summary of Contents for LONWORKS PLT-22
Page 6: ...iv Echelon...
Page 14: ...1 8 Introduction...
Page 67: ...LONWORKS PLT 22 Transceiver s User Guide 5 7 Figure 5 3 Capacitor Input Power Supply Schematic...
Page 92: ...6 10 Design and Test for Electromagnetic Compatibility...
Page 110: ...7 18 Communication Performance Verification...
Page 114: ...8 4 References...
Page 118: ...A 4 Appendix A...
