3-13 DVB-T/H Signal Analyzer (Options 64 and 57) Verification Performance Verification 2
3-84 PN: 10580-00177 Rev. D MS2721B MM
56. Adjust the MN63A Attenuator so that the Sensor A reading is –50 dBm ± 1 dBm. Record the attenuation
reading in Table A-131, “Readings for Sensor A, Sensor B, DAB(–50), and MN63A Attenuation AT(–50),
Option 64” on page A-41.
57. On the MG3700A, adjust the power level so that the Power Meter Sensor A reading
is –50.0 dBm ± 0.2 dBm.
58. Record the following values to the appropriate columns in Table A-131:
Power Meter Sensor A reading to the “Sensor A Reading” column
Power Meter Sensor B reading to the “Sensor B Reading” column
59. Subtract the value of the Sensor A reading from the value of the Sensor B reading and record the result
in the “DAB(–50)” column in Table A-131.
DAB(–50) = Sensor B Reading – Sensor A Reading
60. Calculate the AT(set) values for Test Levels –55 dBm through –84 dBm and record the values in the
AT(set) column of Table A-133, “DVB-T/H Signal Analyzer Level Accuracy Measurement
Channel = 21ch at 474 MHz, Option 64” on page A-42.
61. Remove Sensor A from the Power Splitter, and then connect the Power Splitter to the MS2721B
Spectrum Analyzer RF In port with an N(m)-to-N(m) adapter, as shown in Figure 3-22, “DVB-T/H
Option 64 and Option 57 – Level Accuracy Verification – Sensor B Only” on page 3-82.
62. Record the new Power Meter Sensor B reading in the “SB(–50)” box in Table A-133.
63. Repeat Step 42 through Step 50 for Test Levels –50 dBm to –84 dBm. Change the Reference Level and
switch the Pre Amp ON or OFF per the “Ref Level Pre Amp Off/On” column in Table A-133. Use the
following formula to calculate Deviation:
Deviation = M(Level) – SB(–50) – DAB(–50) – AT(–50) + AT(set)
64. Repeat Step 16 through Step 63 for frequencies 666 MHz (Ch 45) and 858 MHz (Ch 69). Set the
calibration factor of both power sensors to 666 MHz or 858 MHz as required.
For 666 MHz - Channel 45, use Table A-134, “DVB-T/H Signal Analyzer Level Accuracy Measurement
Channel = 45ch at 666 MHz, Option 64” on page A-43.
For 858 MHz - Channel 69, use Table A-135, “DVB-T/H Signal Analyzer Level Accuracy Measurement
Channel = 69ch at 858 MHz, Option 64” on page A-44.
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