HP 8559A ...................................... HP 181T/TR, 909A

PERFORMANCETESTS MODEL 8559A

PERFORMANCE TESTS

4-18. RESIDUAL RESPONSES

SPECIFICATION:

Residual responses are less than -90 dBm (0.01 - 3.06 GHz) with 0 dB input attenuation and no signal present at input. They are less than - 90 dBm (0.025 - 3.06 GHz) with ALT IF selected.

DESCRIPTION:

Signals present on the display without an input signal applied to the spectrum analyzer are residual responses. The .Ol -3 GHz frequency band is checked for residual responses greater than -90 dBm.

EQUIPMENT:

Variable Persistence/Storage Display	...................................... HP 181T/TR
5(M2 Termination, Type N (m) .......................................	HP 909A, Opt. 012

NOTE

The HP 853A Spectrum Analyzer Display may be substituted for the HP 181TKRin this procedure.

NOTE

This test can be performed with no input termination if INPUT ATTEN is set to 20 dB. Note that the input attenuation must then be taken into consideration in establishing the equivalent REFERENCE LEVEL control setting for the measurement. A REFERENCE LEVEL setting of - 40 dBm with 20 dB INPUT ATTEN is equivalent to a REFERENCE LEVEL setting of - 60 dBm with 0 dB INPUT ATTEN.

PROCEDURE:

1.Set spectrum analyzer controls as follows:

FREQUENCYBANDGHz	.................................................. .01-3
TUNING ..............................................................	0.050GHz
FREQSPAN/DIV .........................................................	10MHz
RESOLUTION BW ...............................................	1 MHz, uncoupled
INPUTATTEN ..............................................................	OdB
REFERENCELEVEL ....................................................	-60dBm
REFLEVELFINE ..............................................................	0
AmplitudeScale ........................................................	10 dB/DIV
SWEEPTIME/DIV ........................................................	AUTO
SWEEPTRIGGER .....................................................	FREERUN
ALTIF .....................................................................	OFF
SIGIDENT .................................................................	OFF
BLCLIP ....................................................................	OFF
VIDEOFILTER .........................................................	12o'clock