3-13 DVB-T/H Signal Analyzer (Options 64 and 57) Verification Performance Verification 2
3-90 PN: 10580-00177 Rev. D MS2721B MM
38. Calculate the Delta at –43 dBm Input, Delta(–43), by using the following formula:
Delta(–43) = M(Sa) – 18 – MeasCP(–43) + Dev(–50)
39. Record the result to the Delta column in Table A-139, and verify that it is less than 1 dB.
666 MHz Tests
40. Remove the MS2721B from the test setup and reinstall Sensor A to the open splitter output as shown in
Figure 3-23, “DVB-T/H Option 64 – 1 dB Compression Level Verification – Two Sensors” on page 3-86.
41. Set the MG3700A Frequency to 666 MHz and ensure that the Mod On/Off LED is OFF (not illuminated).
42. Set the calibration factor of both sensors to 666 MHz.
43. Adjust the MN63A attenuation so that Power Meter Sensor A reads –25 dBm ± 1 dBm. Record the
MN63A attenuation readout into the AT(–25) column in Table A-132, “Readings for Sensor A and
MN63A Attenuation AT(–25), AT(–15), AT(–50), and AT(–43), Option 64” on page A-41.
44. Adjust the Level of the MG3700A so that Power Meter Sensor A reads –25.0 dBm ± 0.05 dBm. Record the
Sensor A reading into the M(Sa) column in Table A-132.
45. 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 3-24, “DVB-T/H Option 64 – 1 dB Compression Level Verification –
Sensor B Only” on page 3-88.
46. Set the MS2721B to Channel 45.
47. Set the Pre Amp to Off and the Reference Level to –25 dBm.
48. Repeat Step 18 through Step 39.
858 MHz Tests
49. Remove the MS2721B from the test setup and reinstall Sensor A to the open splitter output as shown in
Figure 3-23, “DVB-T/H Option 64 – 1 dB Compression Level Verification – Two Sensors” on page 3-86.
50. Set the MG3700A Frequency to 858 MHz and ensure that the Mod On/Off LED is OFF (not illuminated).
51. Set the calibration factor of both sensors to 858 MHz.
52. Adjust the MN63A attenuation so that Power Meter Sensor A reads –25 dBm ± 1 dBm. Record the
MN63A attenuation readout into the AT(–25) column in Table A-132, “Readings for Sensor A and
MN63A Attenuation AT(–25), AT(–15), AT(–50), and AT(–43), Option 64” on page A-41.
53. Adjust the Level of the MG3700A so that Power Meter Sensor A reads –25.0 dBm ± 0.05 dBm. Record the
Sensor A reading in the M(Sa) column in Table A-132.
54. 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 3-24, “DVB-T/H Option 64 – 1 dB Compression Level Verification –
Sensor B Only” on page 3-88.
55. Set the MS2721B to Channel 69.
56. Set the Pre Amp to OFF
and the Reference Level to –25 dBm.
57. Repeat Step 18 through Step 39.
To Next Page
Loading...
Need help?
General
