5-36
690XXB/691XXB MM
YIG-tuned oscillator failure (All models except 69017B/69117B))
Step 1.
Connect a 56100A Scalar Network Analyzer to the 690XXB/
691XXB as follows:
a. Connect the 690XXB/691XXB
AUX I/O
to the 56100A
AUX I/O
.
b. Connect the 56100A
DEDICATED GPIB
to the 690XXB/
691XXB
IEEE-488 GPIB
.
c.
Connect the RF Detector to the 56100A Channel A In-
put.
Step 2.
Set up the 690XXB/691XXB as follows:
a. 690XXB Setup:
CW/SWEEP SELECT: Step
F1: 2.000 GHz
F2: 20.000 GHz
Number of Steps: 400
691XXB Setup:
CW/SWEEP SELECT: Analog
F1: 2.000 GHz
F2: 20.000 GHz
Sweep Time: 0.100 Sec
Step 3.
Set up the 56100A 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 56100A, 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.
q
If the RF signal is correct in both frequency and ampli-
tude throughout the full sweep, go to step 8.
q
If there is no RF signal for all or part of the sweep or if
the amplitude of the RF signal is low, go to step 5.
Table 5-18.
Error Messages 124, 125, and 126 (3 of 4)
TROUBLESHOOTING
TROUBLESHOOTING
TABLES
Summary of Contents for 680 C Series
Page 4: ......
Page 5: ......
Page 13: ...Figure 1 1 Typical Series 690XXB 691XXB Synthesized CW Signal Generator Model 69187B Shown ...
Page 61: ......
Page 97: ......
Page 205: ......
Page 207: ......
Page 221: ......
Page 225: ......
Page 241: ......
Page 259: ......
Page 275: ......
Page 285: ......
Page 289: ......
Page 299: ......
Page 303: ......
Page 315: ......