Agilent Technologies 8590 Series Service Manual page 574

Softkey Descriptions
Softkey Descriptions
CAL YTF Calibrate YTF
D This function is available for 8592L, 8593E, 8595E, and
ESCRIPTION
8596E spectrum analyzers only.
Note that the user should perform the
if there has been a large change in ambient
temperature. Since YTF tracking varies with
temperature, the
the unpeaked frequency response specification. Refer to
the calibration guide for your instrument.
In bands 1 through 4, amplitude accuracy, particularly
frequency response, is a function of how well the A3A8
YTF bandpass filter tracks the tuned frequency of the
analyzer. YTF tuning is controlled by DACs located on
the A7 analog interface assembly.
amplitude uncertainty due to YTF tracking by
determining the optimum YTF DAC settings for each
band.
Be sure to use the YTF CAL cable when performing the
CAL YTF
cable part number.
The
CAL YTF
OUT signal (except for the 8595E that uses the CAL
OUT signal), tunes the analyzer to two frequencies in
band 1, and one frequency each in band 2 through band
4. The routine minimizes tracking error by adjusting
the YTF coarse- and fine-tune DAC settings for an
optimum displayed-signal amplitude in each band.
TRACE A
TRACE B
setting.
The routine then sets the analyzer to sweep over the
frequency range of each band. The YTF Span DAC is
adjusted for the maximum swept-amplitude response
in each band. During this part of the routine,
displays the frequency spectrum, and
the amplitude versus YTF span DAC setting.
Be sure to press
routine.
YTF
R S
ELATED OFTKEYS
CAL MXR
574
CAL YTF
routine. Refer to the calibration guide for the
routine, using the 100 MHz COMB GEN
displays the typical frequency spectrum and
displays the amplitude versus YTF DAC
,
CAL CAL STORE
CAL STORE
CAL YTF
routine is required to meet
minimizes
CAL YTF
TRACE A
displays
TRACE B
after running the
Chapter 13
routine
CAL