
Chapter 13 603
Softkey Descriptions
Softkey Descriptions
PRESEL DAC Preselector DAC
DESCRIPTION Note that this function is available for 8592L, 8593E,
8595E, and 8596E spectrum analyzers only.
Peaks the YTF preselector by manually adjusting the
YTF fine-tune DAC. The front-panel entry range for the
DAC is from 1 to 3840.
The analyzer firmware adds the entered value to an
8-bit value (0 to 255), yielding a result between 1 and
4095. This result then drives the 12-bit YTF fine-tune
DAC.
Be sure to use either
PRESET or PRESEL DEFAULT to set
the
PRESEL DAC to an initial value of 2048.
R
ELATED SOFTKEYS CAL YTF
PRESEL DEFAULT
QP DET ON OFF Quasi-Peak Detector On/Off
DESCRIPTION Note that this function is available for 8590 E-Series
spectrum analyzers, 8591C cable TV analyzers, and
8594Q QAM analyzers only.
QP DET ON OFF turns the quasi-peak detector on or off.
R
ELATED SOFTKEYS QP GAIN ON OFF
QP RST ON OFF
QPD OFFSET
QP GAIN ON OFF Quasi-Peak GAIN On/Off
DESCRIPTION Note that this function is available for 8590 E-Series
spectrum analyzers, 8591C cable TV analyzers, and
8594Q QAM analyzers only.
QP GAIN ON OFF amplifies the video signal ten times
(20 dB).
Note that the reference level offset is not changed. The
marker readout and reference level readout must be
divided by 10 to obtain the correct amplitude readout.
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