Agilent Technologies 8590 Series Service Manual page 570

Softkey Descriptions
Softkey Descriptions
CAL FREQ & AMPTD Calibrate Frequency
and Amplitude
D
CAL FREQ & AMPTD
ESCRIPTION
amplitude self-calibration routines. Connect CAL OUT
to the analyzer input before initiating
AMPTD
Be sure to press
FREQ & AMPTD
R S
ELATED OFTKEYS
CAL FREQ
CAL FETCH
CAL STORE
CAL MXR Calibrate Mixer
D Note that this function is available for 8592L, 8593E,
ESCRIPTION
8595E, and 8596E spectrum analyzers only.
Be sure to use
test routines provided in "After an Analyzer Repair" in
Chapter 4
the A3A6 Dual-Band Mixer receives a mixer-bias
current from a DAC on the A7 analog interface
assembly. The mixer-bias current must be adjusted for
each frequency band to minimize conversion loss in the
A3A6 Dual-Band Mixer.
Be sure to use the YTF CAL cable when performing the
CAL MXR
instrument for the cable part number.
The
CAL MXR
setting for the optimum displayed-signal amplitude,
using the 100 MHz COMB OUT signal. The routine
adjusts the bias current at several frequencies in each
band; an optimum bias setting for that band is then
determined. During the routine,
frequency spectrum, while
amplitude versus mixer-bias DAC setting.
The −2001 passcode must be entered to activate the
CAL MXR
pressing the
570
initiates both the frequency and
.
CAL STORE
routine.
CAL AMPTD
in the order of adjustment and
CAL MXR
of this service guide.The high-band mixer in
routine. Refer to the calibration guide for your
routine adjusts the bias-current DAC
calibration routine. Enter the passcode before
key.
CAL
CAL FREQ &
after running the
CAL
displays the
TRACE A
displays the signal
TRACE B
Chapter 13