Amplitude - HP ESA-L1500A User's And Calibration Manual

Front-Panel Key Reference

Amplitude

Amplitude
Amplitude
amplitude menu keys. Amplitude menu key functions include the
following: reference level, input attenuation, vertical scale, mixer level,
amplitude units, amplitude correction, and amplitude offset.
allows the reference level to be changed. This function is activated
Ref Level
when
or voltage represented by the top graticule line on the display.
Changing the value of the reference level changes the absolute
amplitude level (in the current amplitude units) of the top graticule
line. Pressing any digit, 0 through 9, on the numeric keypad brings up
the selected terminator menu. Key Access:
sets the input attenuation in 5 dB increments. The spectrum analyzer
Attenuation Auto
Man
input attenuator, which is normally coupled to the reference level
control, reduces the power level of the spectrum analyzer input signal
at the input mixer. The attenuator is recoupled when Auto is
underlined.
To prevent damage to the input mixer, the power level at the input
CAUTION
mixer must not exceed +30 dBm. To prevent signal compression, power
at the input to the first mixer must be kept below 0 dBm. With the
attenuator set to Auto, a signal at or below the reference level will
result in a mixer level at or below –10 dBm.
Key Access:
sets the logarithmic units per vertical graticule division on the display.
Scale/Div
Scale/Div
Lin
20 dB per division. Key Access:
scales the vertical graticule divisions in logarithmic units when
Scale Type Log Lin
underlined, and the logarithmic units per division can be changed.
Values may range from 0.1 to 20 dB per division. The default amplitude
units are dBm when
linearly scaled and the default amplitude units are volts. The
reference-level value is set to the top of the display and the bottom
graticule becomes zero volts. (Each division of the graticule is one-tenth
of the reference level in volts.) Pressing
the units specified for the current amplitude scale. Pressing
powering on the spectrum analyzer sets the default units.
Key Access:
66
activates the reference level function and accesses the
is pressed. The reference level is the amplitude power
Amplitude
Amplitude
only appears in the
key is set to . Using Scale/Div, values may range from 0.1 to
Log
Lin
Amplitude
Amplitude
menu when the
Amplitude
Amplitude
is underlined. The vertical divisions are
Scale Type Log Lin
Scale Type Log
is
Log
always sets
or
Preset
Chapter 4