Agilent Technologies 8753ES Option 011 Service Manual page 241

NOTE If the analyzer failed internal test 48, default pretune correction constants
were stored which may result in a constant offset of several MHz. Regardless,
continue with this procedure.
Use a spectrum analyzer for problems above 100 MHz.
NOTE
1. Connect the oscilloscope or spectrum analyzer as shown in
oscilloscope input impedance to 50 ohms.)
2. Press
Preset System
SRC TUNE ON
mode.
3. Use the front panel knob or front panel keys to set the pretune frequency to 300 kHz,
30 MHz, and 40 MHz. Verify the signal frequency on the oscilloscope.
NOTE In SRC TUNE mode, the source output frequency changes in 1 to 2 MHz
increments and should be 1 to 6 MHz above the indicated output frequency.
4. Check for the frequencies indicated by
Table 7-1 Output Frequency in SRC Tune Mode
Setting
300 kHz
30 MHz
40 MHz
5. The signal observed on an oscilloscope should be as solid as the signal in
Figure 7-4 Waveform Integrity in SRC Tune Mode
Chapter 7
SERVICE MENU
to activate the source tune (SRC TUNE) service
SRC TUNE FREQ
Observed Frequency
1.3 to 6.3 MHz
31 to 36 MHz
41 to 46 MHz
Figure
SERVICE MODES
Table 7-1.
Source Troubleshooting
Phase Lock Error
7-1. (Set the
SRC ADJUST MENU
Figure 7-4.
7-9