Anritsu MG3642A Manual do Utilizador descarregar pdf (Página 175)

SECTION 7 PERFORMANCE TEST

7-7

STEP PROCEDURE

7. Set the MS2602A RF attenuator to 25 dB with the same setup as in STEP 6.

8. Record the marker level displayed. (Mb-8)

9. Setting the MG3641A/MG3642A output level down to -28 dBm, repeat the measurement and record the

marker level displayed. (Mb-13 to Mb-28)

Where, always set the MS2602A reference level to the larger level by 5 dB than the MG3641A/

MG3642A output level.

10. Set the MS2602A RF attenuator to 5 dB with the same setup as in STEP 9.

11. Record the marker level displayed. (Mc-28)

12. Setting the MG3641A/MG3642A output level down to -48 dBm, repeat the measurement and record the

marker level displayed. (Mc-33 to Mc-48)

Where, always set the MS2602A reference level to the larger level by 5 dB than the MG3641A/

MG3642A output level.

13. Set the MS2602A RF attenuator to 25 dB and reference level to -3 dBm, and set the pre-amplifier as

shown in Fig.7-3.

14. Record the marker level displayed. (Md-48)

15. Setting the MG3641A/MG3642A output level down to -68 dBm, repeat the measurement and record the

marker level displayed. (Md-53 to Md-68)

Where, always set the MS2602A reference level to the larger level by 45 dB than the MG3641A/

MG3642A output level.

16. Set the MS2602A RF attenuator to 5 dB with the same setup as in STEP 15.

17. Record the marker level displayed. (Me-68)

18. Setting the MG3641A/MG3642A output level down to -143 dBm, repeat the measurement and record

the marker level displayed. (Me-73 to Me-143)

Where, always set the MS2602A reference level to the larger level by 45 dB than the MG3641A/

MG3642A output level. However, at -143 dBm measurement, set the MS2602A reference level

to -93 dBm.

At ≤ -118 dBm measurement, perform the measurement with video averaging(10 times) to improve S/N.

19. Calculate the output level accuracy using the calculation sheet in Appendix E.

(5) Note on test

Above mentioned method uses the settings which minimize the internal error of the MS2602A. So, if any other

spectrum analyzer is used, the measurement accuracy cannot be expected.

On some measurement frequencies, the test may not be performed with enough accuracy because of the internal

residual response and an external noise. In this case, shift the measurement frequency.

Since above mentioned method uses the very narrow RBW of the MS2602A, the frequency error occurs if the

frequency drifts. So, heat run the MG3641A/MG3642A and the MS2602A.

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Anritsu MG3642A Manual do Utilizador Página 175