Option Verification 5-4 ISDB-T and BER Verification, Options 30 and 79
MT8212E and MT8213E MM PN: 10580-00255 Rev. J 5-13
49. Subtract Sensor A reading from Sensor B reading and record the result in the ΔAB(QP50) column of
Table A-23.
50. Calculate the AT(set) values for test levels –55 dBm through –84 dBm and record the values into the
AT(set) column in Table A-24.
51. Remove Sensor A from the Power Splitter and then connect the Power Splitter to the MT821xE Spectrum
Analyzer RF In with an N male to N male adapter.
52. Record the new Power Meter Sensor B reading into the SB(–50) box in Table A-24.
53. Repeat Step 32 through Step 40 for Test levels –50 dBm to –84 dBm. Change Reference Level and switch
Pre Amp per the Pre Amp On and Pre Amp Off columns in the test record. Use the following formula
to calculate Deviation:
Deviation = M(Level) – SB(–50) – ΔAB(–50) – AT(–50) + AT(set)
54. Repeat Step 5 through Step 53 for frequencies 623.14285714 MHz (Ch 38) and 767.14285714 MHz
(Ch 62). Set the calibration factor of both power sensors to 623 MHz or 767 MHz, as required.
55. Record the results in Table A-25, “ISDB-T Signal Analyzer Level Accuracy Measurement Channel = 38ch
at 623.14285714 MHz” on page A-19 and Table A-26, “ISDB-T Signal Analyzer Level Accuracy
Measurement Channel = 62ch at 767.14285714 MHz” on page A-20.
Displayed Average Noise Level (DANL) Verification
The tests in this section verify the DANL of the MT821xE in ISDB-T Signal Analyzer mode.
Procedure
1. Set the mode of the MT821xE to ISDB-T Signal Analyzer and preset the instrument.
2. Install a 50 ohm termination to the Spectrum Analyzer RF In connector.
3. Press the Meas Selection main menu key, then press Field Strength.
4. Press the Freq/Level main menu key and confirm that the channel is set to 13 and that Pre Amp is Off.
5. Set the Reference Level t –25 dBm.
6. Press the Meas Setup main menu key. Change Meas Mode to Average and leave Average Count set to 50.
7. After Average (50/50) appears, record the Channel Power in Table A-27, “ISDB-T Signal Analyzer DANL
with Pre Amp Off” on page A-21.
8. Set the Reference Level to –50 dBm and the Pre Amp to On.
9. After Average (50/50) appears, record the Channel Power in Table A-28, “ISDB-T Signal Analyzer DANL
with Pre Amp On” on page A-21.
10. Change the channel to 38. Set the Pre Amp to Off.
11. Repeat Step 5 through Step 9 for Channel 38
12. Change the channel to 62. Set the Pre Amp to Off.
13. Repeat Step 5 through Step 9 for Channel 62.
Phase Noise Verification
This test verifies the phase noise measurements of the MT821xE in the ISDB-T Signal Analyzer mode.
1. Connect the 10 MHz Frequency Reference signal to the MG3700A and the MT821xE.
2. Set the MG3700A frequency to 473.14285714 MHz. Set the level to –10 dBm.
3. Press the Mod On/Off key so that the LED is Off.
4. Input the RF signal from MG3700A into the MT821xE Spectrum Analyzer RF In.
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