Performance Verification 2 3-13 DVB-T/H Signal Analyzer (Options 64 and 57) Verification
MS2721B MM PN: 10580-00177 Rev. D 3-89
18. Record the MS2721B Channel Power reading, MeasCP(–25), to the –25 dBm “Test Level” row of the
“Measured Value” column in Table A-136, “DVB-T/H Analyzer 1 dB Compression Level Channel 21 with
Pre Amp OFF, Option 64” on page A-45.
19. Calculate the difference, Delta(–25), by using the following formula (where MeasCP(–25) is from the
“Measured Value” column in Table A-136, and M(Sa) is from 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):
Delta(–25) = M(Sa) – MeasCP(–25)
20. Record the result in the Delta (Δ) column in Table A-136, and verify that the result is less than 1 dB.
21. Calculate AT(–15) by using the following formula (where AT(–25) is from Table A-132):
AT(–15) = AT(–25) – 10
22. Record the AT(–15) value in Table A-132.
23. Set the MN63A attenuation to AT(–15).
24. Record the MS2721B Channel Power reading, MeasCP(–15), to the –15 dBm “Test Level” row of the
“Measured Value” column in Table A-136, “DVB-T/H Analyzer 1 dB Compression Level Channel 21 with
Pre Amp OFF, Option 64” on page A-45.
25. Calculate the Delta at –15 dBm Input by using the following formula:
Delta(–15) = M(Sa) + 10 – MeasCP(–15) + Delta(–25)
26. Record the result to the Delta column in Table A-136, and verify that it is less than 1 dB.
27. Calculate the value of AT(–50) by using the following formula:
AT(–50) = AT(–25) + 25
28. Record the value of AT(–50) 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.
29. Adjust the MN63A attenuation to AT(–50).
30. Set the Reference Level on the MS2721B to –50 dBm and turn on the Pre Amp.
31. Record the MS2721B Channel Power reading, MeasCP(–50), to the –50 dBm “Test Level” row of the
“Measured Value” column in Table A-139, “DVB-T/H Analyzer 1 dB Compression Level Channel 21 with
Pre Amp ON, Option 64” on page A-45.
32. Calculate the Delta at –50 dBm Input, Delta(–50), by using the following formula:
Delta(–50) = M(Sa) – 25 – MeasCP(–50) + Delta(–25)
33. Record the result to the Delta column in Table A-139, and verify that it is less than 1 dB.
34. Calculate the AT(–43) by using the following formula:
AT(–43) = AT(–25) + 18
35. Record the value of AT(–43) 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.
36. Set the MN63A attenuation to AT(–43).
37. Record the MS2721B Channel Power reading, MeasCP(–43), in the –43 dBm “Test Level” row of the
“Measured Value” column in Table A-139.
Note
The Over Range message on the MS2721B is normal.
Note The Over Range message on the MS2721B is normal.
To Next Page
Loading...
Need help?
General
