Tektronix RTX130B, Service Manual

Page: 59 / 180

Performance Verification
RTX130B QAM & VSB RF Signal Generator Service Manual
3-9
This test verifies the internal clock output level and frequency accuracy.
Equipment
i d
Oscilloscope q p
required
Frequency counter
50
Ω
BNC cable
1. Use the 50
Ω
BNC cable to connect the Trig In/Out connector on the
RTX130B to the oscilloscope CH1 input. See Figure 3-6.
Oscilloscope (TDS5104B)
50
Ω
BNC cable
RTX130B rear panel
Figure 3-6: Equipment connection for checking the internal clock output level
2. Select Play > Others on the RTX130B to open the Others dialog box.
3.
In the dialog box, select the
Ext Trigger BNC
button to open the Ext
Trigger BNC dialog box.
4. In the dialog box, set BNC IN/OUT to Output and BNC OUT Selection to
27 MHz .
Internal Clock Output
Level and Frequency
Accuracy