Tektronix RTX100B, Service Manual

Page: 56 / 178

Performance Verification
3-10
RTX100B ISDB-T RF Signal Generator Service Manual
5. Set the oscilloscope as indicated below:
Vertical scale 1 V/div (CH1) . . . . . . . .
Input impedance 50
Ω
. . . . .
Horizontal scale 10 ns/div . . . . .
Trigger position 50% . . . . . .
Acquire mode Average 16 . . . . . . .
Trigger mode Auto . . . . . . . .
Trigger level 1.20 V . . . . . . . .
Trigger source CH1 . . . . . . .
Trigger slope Rising Edge . . . . . . . .
Input coupling DC . . . . . . .
Measure High Level, Low level . . . . . . . . . . . .
6. Verify that the measured values are as follows:
High Level: > 2.2 V
Low Level: < 0.8 V
7. Disconnect the 50
Ω
BNC cable from the oscilloscope CH1 input, and then
connect the BNC cable to the CH1 connector on the frequency counter. See
Figure 3-7.
RTX100B rear panel
Frequency counter (53181A Option 015)
50
Ω
BNC cable
Figure 3-7: Equipment connection for checking the internal clock frequency
8.
Set the frequency counter as indicated below:
MEASURE Frequency1 . . . . . . . . .
Gate Time: 0.20 s
CHANNEL1 Coupling: DC . . . . . . . .
Impedance: 50
Trigger: AUTO TRIG ON
9. Record the frequency counter reading in the test record. (See page 3-7.)