Tektronix RTX100A, Service Manual, Page: 66 / 160

Performance Verification
3-20
RTX100A ISDB-T RF Signal Generator Service Manual
Checking the Output Signal.
1. Use the 75
Ω
BNC cable to connect the RF Out connector on the RTX100A
to the CH2 connector on the frequency counter. See Figure 3-10.
RTX100A rear panel
Frequency counter (53181A Option 015)
75
Ω
BNC cable
Figure 3-10: Equipment connection for checking the RF output signal
2. Select ISDB-T/ASI > Calibration on the RTX100A.
3.
In the resulting dialog box, enter
rtx100cal
for a password. The
ISDB-T
Calibration dialog box appears.
4. In the dialog box, set Reference Frequency to 13 , and then select the Cal
Signal
check box.
5. Set the frequency counter settings as indicated below:
MEASURE Frequency2 . . . . .
Gate Time: 0.20 s
6.
Verify that the frequency counter reading falls within the range of
473.1426 MHz to 473.1434 MHz.
7. Set Reference Frequency to 38 .
8.
Verify that the frequency counter reading falls within the range of
623.1424 MHz to 623.1436 MHz.
9. Set Reference Frequency to 62 .
10. Verify that the frequency counter reading falls within the range of
767.1423 MHz to 767.1437 MHz.
11. Clear the Cal Signal check box.
12. Disconnect the 75 Ω BNC cable from the RTX100A and frequency counter.