PERFORMANCETESTSMODEL 8559A

PERFORMANCE TESTS

 

4-23.REFERENCE LEVEL ACCURACY (Cont'd)

 

PROCEDURE:

 

Step Accuracy in Log Mode

 

Set equipment controls as follows:

 

Spectrum Analyzer:

 

FREQUENCYBANDGHz ..................................................

.01-3

TUNING .................................................................

30MHz

FREQ SPAN/DIV .........................................................

100 kHz

RESOLUTION BW ................................................

30 kHz, uncoupled

INPUTATTEN ..............................................................

OdB

REFERENCE LEVEL ....................................................

- 10 dBm

REFLEVELFINE ..............................................................

0

Amplitude Scale .........................................................

1 dB/DIV

SWEEP TIME/DIV ........................................................

AUTO

SWEEPTRIGGER .....................................................

FREERUN

ALTIF .....................................................................

OFF

SIG IDENT .................................................................

OFF

BLCLIP ....................................................................

OFF

VIDEOFILTER ..........................................................

2o'clock

Signal Generator:

 

COUNTERMODE ..............................................

INT,EXPANDXlO

AM ........................................................................

OFF

FM ........................................................................

OFF

FREQUENCYTUNE ......................................................

30MHz

RF ..........................................................................

ON

OUTPUTLEVEL ........................................................

-2dBm

Connect equipment as shown in Figure 4-18 using 10-dB step attenuator. Set step attenuator to 0 dB and adjust spectrum analyzer TUNING control to center 30 MHz signal on CRT Set FREQ SPAN/DIV control to 10 kHz and RESOLUTION BW control to 3 kHz, adjusting TUNING control as necessary to keep signal centered on CRT

Adjust signal generator OUTPUT LEVEL control to position peak of signal 6 divisions above graticule baseline. Set step attenuator and spectrum analyzer REFERENCE LEVEL control to settings indicated in Table 4-10. Record deviation of signal peak from 6th division for each setting.

To calculate Corrected Deviation, add Step Attenuator Error (calibration data at 30 MHz) to Deviation from 6th Division for each setting. Corrected Deviation should not exceed +0.5 dB from - 10 dBm to

-80 dBm, and should not exceed k 1.0 dB from - 10 dBm to - 100 dBm. Record maximum values.