Tektronix RTX100A, Руководство по обслуживанию

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Performance Verification
3-4
RTX100A ISDB-T RF Signal Generator Service Manual
5. Set the oscilloscope settings 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 3-2.
RTX100A rear panel
Frequency counter (53181A Option 015)
50
Ω
BNC cable
Figure 3-2: Equipment connection for checking the internal clock frequency
8.
Set the frequency counter settings as indicated below:
MEASURE Frequency1 . . . . . . . . .
Gate Time: 0.20 s
CHANNEL1 Coupling: DC . . . . . . . .
Impedance: 50
Trigger: AUTO TRIG ON
9. Verify that the frequency counter reading falls within the range of
26.999973 MHz to 27.000027 MHz (< 1.0 ppm).