Tektronix 494AP service manual Date 5/u9o, Perfrmanceheck pRocEDURE change stepr r as foltows

Tekt"fp"n[X.	MANUAL CHANGE INFORMATION
Date: 5/u9o	ChangeReference:C2lSgO
Product:494N4g4Ap ServiceVol. 1
	ManualPart No. 070-5s60-OO	product Group: 2E

In section4 - PERF)RMANCE)HECK pRocEDURE change stepr r as foltows:

Replace header secfian with the foltowing:

11. Check ResolutionBandwidthand Shape Factor (bandwidthis within2oo/oot the selectedLandwidthfor allbutthe'l0Hzfilter;.10Hzto 1 MHz in decadesteps, and 3 MHz; shape factor is 7.5:.t or less _ 60 dB bandwidthfor the .t0Hz filreris s150 Hz)

Change step i. to read as follows:

.i. Repeatthe processto checkthe resolutionbandwidth and shapelactorfor the 10 kHz, 1 kHz, and 100 Hz fihers.

j.To checklhe60dBbandwidthofthe 10 Hzfitter,setthe SpanrDivro 50 Hz, and the REFEHENCEt_EVfL lo _20 dBm. Push AUTO RES, VTDEOFTLTERWlOe, and ser PEAK AVERAGEto average.

k. Checkthatthe 60 dB bandwidthis <150 Hz.