Anritsu 682XXB - Manual (Page 196)

5-30 682XXB/683XXB MM
Error 110 The 100MHz Reference is not Locked to the High
Stability 10MHz Crystal Oscillator
Description: The reference loop is not phase-locked to the Option 16
high stability 10 MHz crystal oscillator.
Step 1. Disconnect the cable from A3J6.
Step 2. Using an oscilloscope, verify the presence of a 10 MHz signal
at the end of the cable. The signal amplitude should be
³1 volt (into 50W).
G If present, replace the A3 PCB.
G If not present, replace the Option 16 crystal oscillator
assembly.
Table 5-8. Error Messages 108, 109 and 110 (2 of 2)
TROUBLESHOOTING
TROUBLESHOOTING TABLES
A5 Fine Loop
Error 111 Fine Loop Osc Failed
Description: One or more of the oscillators within the fine loop is not
phase-locked.
Step 1. Disconnect cable W121 at A5J5.
Step 2. Using a spectrum analyzer, verify the presence of a +3 dBm
±5 dB, 10 MHz signal at the end of the cable.
G If present, go to step 9.
G If not present, go to step 3.
Step 3. Disconnect cable W121 at A4J7.
Step 4. Using the spectrum analyzer, verify the presence of the
+3 dBm
±5 dB, 10 MHz signal at A4J7.
G If present, replace the cable W121.
G If not present, go to step 5.
Step 5. Disconnect cable W105 at A4J6.
Table 5-9. Error Message 111 (1 of 2)