ADJUSTMENTS

MODEL 8559A

ADJUSTMENTS

5-22. 3-dB BANDWIDTH ADJUSTMENTS (Cont'd)

PROCEDURE:

Set spectrum analyzer controls as follows:

FREQUENCYBAND

................................................. 0.01-3GHz

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

35MHz

FREQSPAN/DIV .........................................................

200kHz

RESOLUTIONBW .........................................................

lMHz

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

10dB

REFERENCELEVEL .......................................................

OdBm

Amplitudescale ..............................................................

LIN

SWEEPTIME/DIV .........................................................

2msec

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

FREERUN

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

OFF

BASELINECLIPPER

........................................................ OFF

853A (if used) ..............

TRACE A & TRACE B STORE BLANK (ANALOG DISPLAY)

Connect CAL OUTPUT to spectrum analyzer INPUT

Set a 7.1 division signal level on display with REF LEVEL FINE control. Signal will be 0.9 division from top graticule line.

Adjust A9R85 LC control for a 5 division wide signal at fifth graticule line.

Set RESOLUTION BW to 3 MHz and FREQ SPAN/DIV to 500 kHz. If necessary, reset signal level to 7.1 divisions with REF LEVEL FINE control. The bandwidth at the fifth graticule line should be between 5.4 and 6.6 divisions.

NOTE

A9R85 LC may be further adjusted to bring the 3 MHz and 300 kHz bandwidths within limits; however, the final measurement of the 1 MHz bandwidth must be between 4.5 and 5.5 division at the fifth graticule line. (If the 3 MHz bandwidth cannot be brought within limits by adjustment of A9R85 LC, change the value of factory-selected resistor A9R120*. If the 300 kHz bandwidth cannot be brought within limits by adjustment of A9R85 LC, change the value of A9R116*.)

Set RESOLUTION BW to 300 kHz and FREQ SPAN/DIV to 50 kHz. If necessary, reset signal level to 7.1 divisions with REF LEVEL FINE control. The bandwidth should be between 5.4 and 6.6 divisions at the fifth graticule line.

Set RESOLUTION BW to 100 kHz and FREQ SPAN/DIV to 20 kHz. If necessary, reset signal level-to 7.1 divisions with REF LEVEL FINE control. The bandwidth should be between 4.3 and 5.7 divisions at the fifth graticule line.