Anritsu manual Error 112 Coarse Loop Osc Failed, Step, 682XXB/683XXB Measured

	TROUBLESHOOTING
TROUBLESHOOTING	TABLES

Table 5-11.Error Message 112

A4 Coarse Loop

Error 112 Coarse Loop Osc Failed

Description: The coarse loop oscillator is not phase-locked.

			Step 1.	Disconnect cable W103 at A4J1 and cable W105 at A4J6.
			Step 2.	Using a spectrum analyzer, verify the presence of a +5 dBm
				￿6 dB, 500 MHz signal at the end of cable W103 and a
				+3 dBm ￿5 dB, 10 MHz signal at the end of cable W105.
				qIf present, go to step 5.
				If one or both of the signals are not present, go to step 3.
			Step 3.	Disconnect cable W103 at A3J1 and cable W105 at A3J4.
			Step 4.	Using the spectrum analyzer, verify the presence of the
				+5 dBm ￿6 dB, 500 MHz signal at A3J1 and the +3 dBm
				￿5 dB, 10 MHz signal at A3J4.
				If the 500 MHz signal is present, replace cable W103.
				qIf the 10 MHz signal is present, replace cable W105.
				If the signals are not present, replace the A3 PCB.
			Step 5.	Reconnect cable W103 to A4J1 and cable W105 to A4J6,
				then disconnect cable W106 at A4J3.
			Step 6.	Set up the 682XXB/683XXB to generate the CW frequencies
				listed in Table 5-12.
Table 5-12.Coarse Loop Frequencies
			Step 7.	Using a spectrum analyzer, measure the frequency and am-
682XXB/683XXB	Measured
				plitude of the signal at A4J3 for each of the CW frequencies
CW Frequency	Frequency at A4J3
				generated. In each case, the signal amplitude should be
2.000 GHz	219.5 MHz	10 kHz
				+4 dBm ￿6 dB with sidebands at <–50 dBc.
2.050 GHz	225.0 MHz	10 kHz		If the signals are correct in both frequency and ampli-
2.225 GHz	244.5 MHz ±10 kHz			tude, go to step 8.
				If the signals are incorrect, replace the A4 PCB.
			Step 8.	Reconnect cable W106 to A4J3 and run self-test again.
				qIf error 112 is not displayed, the problem is cleared.

If error 112 is still displayed, contact your local

ANRITSU service center for assistance.

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