Option Verification 5-6 ISDB-T SFN Verification, Option 32
MT8212E and MT8213E MM PN: 10580-00255 Rev. J 5-23
46. After the Measuring percentage gets to 100%, record the –20 dBm Channel Power from the MT821xE
into the M(Level) column under Pre Amp On in Table A-32.
47. Calculate the Deviation using the following formula:
Deviation = M(Level) – SB(–10) – ΔAB(–10) – AT(–10) + AT(set)
48. Record the result to the Dev column under Pre Amp On in Table A-32 and verify that it is within
specification.
49. Repeat Step 40 through Step 48 for Test Levels –25 dBm to –45 dBm. Change Reference Level and switch
Pre Amp per the Pre Amp On and Pre Amp Off columns in Table A-32.
50. Turn Off the power amplifier, disconnect the power splitter from the MT821xE, and re-connect Sensor A
to the power splitter, as shown in Figure 5-4 on page 5-20.
51. Set the MN63A attenuation to 10 dB.
52. Set the MG3700A level to –60 dBm.
53. Turn On power amplifier and allow it to warm up for at least 5 minutes.
54. Adjust the MN63A attenuator so that the Sensor A reading is –50 dBm ± 1 dB. Record the attenuation
reading as AT(–50) in Table A-33, “ISDB-T SFN Level Accuracy Verification, AT(–50)” on page A-26.
55. On the MG3700A, adjust power level so that the Power Meter Sensor A reading is –50.0 dBm ± 0.2 dB.
56. Record Power Meter Sensor A and Sensor B readings in Table A-33.
57. Subtract Sensor A reading from Sensor B reading and record the result in the ΔAB(–50) column of
Table A-33.
58. 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-32.
59. 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.
60. Record the new Power Meter Sensor B reading into the SB(–50) box in Table A-32.
61. Repeat Step 40 through Step 48 for Test levels –50 dBm to –84 dBm. Change Reference Level and switch
Pre Amp On or Off per the Pre Amp On or Pre Amp Off column in Table A-32. Use the following
formula to calculate Deviation:
Deviation = M(Level) – SB(–50) – ΔAB(–50) – AT(–50) + AT(set)
62. Repeat Step 17 through Step 61 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.
63. Record the results in Table A-34, “ISDB-T SFN Analyzer Level Accuracy Measurement Channel = 38ch
at 623.14285714 MHz” on page A-27 and Table A-35, “ISDB-T SFN Signal Analyzer Level Accuracy
Measurement Channel = 62ch at 767.14285714 MHz” on page A-28.
To Next Page
Loading...
