Tektronix 494AP Q15oit riline, Ull, TR5O2, OutputLevel -dBm Var dB Dot Intensity Off

PerformanceCheckprocedure- 4g4Al4g4ApServiceVol. 1

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34.Check Option 42110 MHz OUT Level ((0 dBmfor Band1)

(>.-40dBmfor Band5)

. a. Tune the Spectrum Analyzer CENTER FRE_ QUENCYto 100MHz.

b. Connecta signal generatorto the RF lNpUT. Set the signalgeneratoroutputfrequencyto i00 MHz, and outputlevelto -30dBm.

c. Set th€ REF LEVEL to -gOdBm. and RF ATTENUATIONto OdB.

d. Switch the FREQUENCYSPAN/DV control towards zero span while keepingthe signal centered with the CENTER FREQUENCYcontrot. The crt SPANiDIVreadoutwill indicate10 ms when zero span is reached.

e. Monitorthe 110 MHz OUTwith a test spectrum analyzer.

f. set the CENTERFREOUENCYcontrot to peak the signaldisplayedon the test spectrumanalyzer.

g. check that the 110 MHz tF ouT outputtevetis

(0 dBm -8

typically dBm for Band1.

-h. Connecta signalgenerator,capableof delivering

18 GHz,to the RF lNpUT. Setthe signalgeneratorout-

put frequ€ncyto 18 GHz and outputlevelto -30 dBm.

i.Reset the Spectrum Anatyzer CENTER FRE- OUENCYto 18 GHz on Band5, REFERENCELEVELto -30dBm,andRF ATTENUATTONto 0 ctB.

j.Switch thE FREOUENCYSPAN/DV control towards zero span while keeping the signal centered with the CENTER FREQUENCYcontrol. The crr SPANIDIVreadoutwill indicate10 ms whenzerospan is reached.

k.set the CENTERFREQUENCYcontrotto peak the signaldisplayedon the t€st spectrumanalyzer.

l.check that the 110 MHz tF ouT levet is )-40 dBm.

35.Check Optiopn 4211O MHz lF Output Bandwidth, Center Frequency, Bandpass

Ripple, and Symmetry About 110 MHz

(Bandwidth:>5 MHz)

(CenterFrequency:108.5MHz-l11 .5 MHz)

(BandpassRipple;<0.5 dB)

(Symmetry:*1.0 MHz)

a.Connectthe test equipmentas shownin Figure

4-27.

b.Set the test equipmentcontrolsas follows:

TR5O2
OutputLevel-dBm	30
Var dB	0
Dot Intensity	Off

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H:H7L14					IF	Spectrsm Analyzer Under Test
						(Option 42)
ull					11OMHz
	I				Q.
I				ll
	O
e	Trrckiog	o		.I RF	Q15o'it r'i"line
RF In	Gcn		Input	o	2ndLO Gcn	o o o

Figure 4-27. Test equlpment setup lor checking option 42 frequency characterlstics.

4-38

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