Anritsu 682XXB - Manual (Page 205)

682XXB/683XXB MM 5-39
YIG-tuned Oscillator
Error 124 Full Band Unlocked and Unleveled
Error 125 8.4-20 GHz Unlocked and Unleveled
Error 126 2-8.4 GHz Unlocked and Unleveled
Description: These error messages indicate either a failure of one or
both of the oscillators in the 2-20 GHz YIG-tuned oscillator assembly.
Step 1. Connect a 562 Scalar Network Analyzer to the 682XXB/
683XXB as follows:
a. Connect the 682XXB/683XXB AUX I/O to the 562 AUX
I/O .
b. Connect the 562 DEDICATED GPIB to the 682XXB/
683XXB IEEE-488 GPIB .
c. Connect the RF Detector to the 562 Channel A Input.
Step 2. Set up the 682XXB/683XXB as follows:
a. 682XXB Setup:
CW/SWEEP SELECT: Step
F1: 2.000 GHz
F2: 20.000 GHz
Number of Steps: 400
683XXB Setup:
CW/SWEEP SELECT: Analog
F1: 2.000 GHz
F2: 20.000 GHz
Sweep Time: 0.100 Sec
Step 3. Set up the 562 Scalar Network Analyzer as follows:
a. Press SYSTEM MENU key.
b. From System Menu display, select RESET.
c. Press CHANNEL 2 DISPLAY: OFF.
d. Press CHANNEL 1 DISPLAY: ON.
e. Press CHANNEL 1 MENU key.
f. From the Channel 1 Menu display, select POWER.
Step 4. Using the scalar network analyzer, measure the RF output
directly at the YIG-tuned oscillator’s output connector. The
amplitude of the RF signal should be >4 dBm throughout
the full sweep.
Table 5-18. Error Messages 124, 125, and 126 (1 of 2)
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