Agilent Technologies 8590 Series Service Manual page 610

Softkey Descriptions
Softkey Descriptions
X FINE TUNE DAC Extra-Fine Tune DAC
D Displays the output of the YTO extra-fine-tune DAC,
ESCRIPTION
FM_TUNE, on the A7 analog interface assembly.
The lower four divisions of the screen represent a 0 to
−10 V output range. Midscreen represents 0 V and
bottom-screen represents −10 V. The DAC voltage level
is displayed as a horizontal line within the four
divisions.
Refer to
information.
R S
ELATED OFTKEYS
FINE TUNE DAC
DACS
YTF DRIVER YTF Driver
D Note that this function is available for 8592L, 8593E,
ESCRIPTION
8595E, and 8596E spectrum analyzers only.
Displays the output of the sample-and-hold circuit in
the YTF span divider and driver on the A7 analog
interface assembly. This signal is then converted to a
current to drive the YTF.
The instrument must be in a single-band sweep for the
display to be valid.
The lower four divisions of the screen represent a 0 to
−10 V output range. Midscreen represents 0 V and
bottom-screen represents −10 V.
A ramp is displayed for all spans except zero span. In
zero span, a horizontal line is displayed.
The displayed voltage is the sum of the YTF fine-tune
DAC, YTF coarse-tune DAC, and YTF span voltages.
The voltage becomes more negative as the tuned
frequency increases.
Refer to
information.
R S
ELATED OFTKEYS
YTF TUNE FINE
YTF SPAN
610
Chapter 6 for additional LO troubleshooting
COARSE TUNE DAC
Chapter 6 for further troubleshooting
YTF TUNE COARSE
Chapter 13