3-4 ISDB-T Signal Analyzer (Option 30) Verification Performance Verification 2
3-18 PN: 10580-00177 Rev. D MS2721B MM
36. Record the result to the Delta column in Table A-55. Verify that it is less than 1 dB.
623.14285714 MHz Tests
37. Remove the MS2721B from the test setup and re-install Sensor A to the open splitter output as shown in
Figure 3-4, “Level Accuracy and 1 dB Compression Level Pretest Setup – Two Sensors” on page 3-11.
38. Set the MG3700A Frequency to 623.14285714 MHz. Ensure that the MOD On/Off button LED is Off
(not illuminated).
39. Set the calibration factor of both sensors to 623 MHz.
40. Adjust the MN63A attenuation so that the Power Meter Sensor A reads –25 dBm ± 1 dB. Record the
MN63A attenuation readout in the “MN63A Attenuation Reading, AT(–25)” column in Table A-48,
“Readings for Sensor A and MN63A Attenuation AT(–25), AT(–15), AT(–50), and AT(–43), Option 30”
on page A-16.
41. Adjust the Level of the MG3700A so that the Power Meter Sensor A reads –25.0dBm±0.05dB. Record
the Sensor A reading in the “Sensor A Reading, M(Sa)” column in Table A-48.
42. Remove Sensor A from the splitter and connect the MS2721B RF In port to the open end of the splitter
using an adapter as shown in Figure 3-5, “Level Accuracy Verification Setup – Sensor B Only”
on page 3-13.
43. Set the MS2721B Channel to 38.
44. Set Pre Amp to Off and Reference Level to –25 dBm.
45. Repeat Step 18 through Step 36 for Channel 38.
767.14285714 MHz Tests
46. Remove the MS2721B from the test setup and re-install Sensor A to the open splitter output as shown in
Figure 3-4, “Level Accuracy and 1 dB Compression Level Pretest Setup – Two Sensors” on page 3-11.
47. Set the MG3700A Frequency to 767.14285714 MHz. Ensure that the MOD On/Off button LED is OFF
(not illuminated).
48. Set the calibration factor of both sensors to 767 MHz.
49. Adjust the MN63A attenuation so that Power Meter Sensor A reads –25 dBm ± 1 dB. Record the MN63A
attenuation readout in the “MN63A Attenuation Reading, AT(–25)” column in Table A-48, “Readings for
Sensor A and MN63A Attenuation AT(–25), AT(–15), AT(–50), and AT(–43), Option 30” on page A-16.
50. Adjust the Level of the MG3700A so that Power Meter Sensor A reads –25.0 dBm ± 0.05 dB. Record the
Sensor A reading in the “Sensor A Reading, M(Sa)” column in Table A-48.
51. Remove Sensor A from the splitter and connect the MS2721B RF In port to the open end of the splitter
using an adapter as shown in
Figure 3-5, “Level Accuracy Verification Setup – Sensor B Only”
on page 3-13.
52. Set the MS2721B Channel to 62.
53. Set Pre Amp to OFF and Reference Level to –25 dBm.
54. Repeat Step 18 through Step 36 for Channel 62.
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