Tektronix 494AP service manual +i

(2)AcrivareMARKER MENUpushbutton.

(3)Select"7 - ENTER BANDWTDTHNUMBER"

(4)Enter'60"with the keypadandterminatewilh "d8".

(5)ActivateBAND WIDTH modepushbutton(<green_ sHIFT>BANDWTDTH).

(6)Fromthe informationdisplayedon the CRT, record the 60 dB bandwidthin Tabte4A.

(7)Usingthe values in Table44, measurethe 60 dB bandwidrhfor allremaining RESOLUTIONBAND- WIDTH setrings(excepr10 Hz).

d.UsingthevaluesrecordedinTable44forthe 6 dB and 60 dB bandwidth,calculateand recordthe shape factorfor each RESOLUTTONBANDWTDTH(excepr10 Hz)

e.Checkthateach FiESOLUTIONBANDWTDTHshape factor is lessthan or equal to lhe specificationin Table 4A.

f.To checkthe 6OdB bandwidthof the 1OHz filter,set the Span/Divlo 50 Hz, andthe REFERENCELEVELto _20 dBm. Push AUTO RES, VTDEOFILTERWIDE, and ser PEAK AVERAGEto average.

g.Checklhat the 60 dB bandwidthis s150 Hz.

h.Aftercompletionof thetest,deactivateBANDWIDTH MODE.

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A. Measuring6 dB down bandwidth	B. Measuring6OdB down bandwidth
	and computingshape factor
Figure4-9. Displaysthat illustratehow bandwidth
	and shape factor are determinedusing markers.

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