Agilent Technologies 86038B User Manual page 17

Agilent 86038B Photonic Dispersion and Loss Analyzer, Second Edition
If the PDLA cannot communicate with the TLS or
MWM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 288
Troubleshooting GPIB Communications Problems. . . . . 289
1. Check the PDLA Status Log . . . . . . . . . . . . . 289
2. Ensure that GPIB cables are configured
correctly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 289
3. Check the system GPIB Addresses. . . . . . . 289
4. Check the tunable laser source and multi-
wavelength meter firmware revision . . . . . . . 290
5. Ensure that the GPIB setting in the PNA
software is set to talker / listener . . . . . . . . . 291
6. Ensure that NI GPIB driver is enabled, Agilent
GPIB driver is disabled.. . . . . . . . . . . . . . . . . . . 291
7. Reboot the TLS. . . . . . . . . . . . . . . . . . . . . . . . 292
8. Reboot the PNA . . . . . . . . . . . . . . . . . . . . . . . 292
9. Swap GPIB Cables. . . . . . . . . . . . . . . . . . . . . 292
Troubleshooting Problems with Remote Programming . 293
Troubleshooting Sweep and Normalization Problems . . 294
If the Modulator Bias does not complete . . . 294
If the Wavelength Correction does not complete
295
If Mode Hops are reported in the Status Bar 295
Troubleshooting Incorrect Data . . . . . . . . . . . . . . . . . . . . . 297
If measured loss is very high or parts of the curve
are missing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 297
If wavelengths are incorrect, or measurements
are incorrect at certain wavelengths . . . . . . . 297
If the GD and Gain/Loss data looks incorrect. . .
297
If the Group Delay measurement appears to be
noisy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 298
If the Group Delay measurement shows a
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