66
Chapter 4
Front-Panel Key Reference
Amplitude
Amplitude
Amplitude
activates the reference level function and accesses the
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.
Ref Level
allows the reference level to be changed. This function is activated
when
Amplitude
is pressed. The reference level is the amplitude power
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:
Amplitude
Attenuation Auto
Man
sets the input attenuation in 5 dB increments. The spectrum analyzer
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.
CAUTION
To prevent damage to the input mixer, the power level at the input
mixer must not 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:
Amplitude
Scale/Div
sets the logarithmic units per vertical graticule division on the display.
Scale/Div
only appears in the
Amplitude
menu when the
Scale Type Log
Lin
key is set to
Log
. Using Scale/Div, values may range from 0.1 to
20 dB per division. Key Access:
Amplitude
Scale Type Log Lin
scales the vertical graticule divisions in logarithmic units when
Log
is
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
Lin
is underlined. The vertical divisions are
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
Scale Type Log Lin
always sets
the units specified for the current amplitude scale. Pressing
Preset
or
powering on the spectrum analyzer sets the default units.
Key Access:
Amplitude
Summary of Contents for ESA-L1500A
Page 12: ...11 1 Preparing for Use and Printing ...
Page 28: ...27 2 Getting Started ...
Page 47: ...46 Chapter2 Getting Started Analyzer Battery Information ...
Page 48: ...47 3 Troubleshooting ...
Page 54: ...Chapter 3 53 Troubleshooting How to Return Your Analyzer for Service Figure 3 1 ...
Page 117: ...116 Chapter4 Front Panel Key Reference Trig ...
Page 118: ...117 5 Menu Maps ...
Page 119: ...118 Chapter5 Menu Maps ...
Page 120: ...Chapter 5 119 Menu Maps ...
Page 121: ...120 Chapter5 Menu Maps ...
Page 122: ...Chapter 5 121 Menu Maps ...
Page 124: ...Chapter 5 123 Menu Maps ...
Page 125: ...124 Chapter5 Menu Maps ...
Page 128: ...Chapter 5 127 Menu Maps ...
Page 129: ...128 Chapter5 Menu Maps ...
Page 130: ...Chapter 5 129 Menu Maps ...
Page 131: ...130 Chapter5 Menu Maps ...
Page 135: ...134 Chapter5 Menu Maps ...
Page 136: ...135 6 Options and Accessories ...
Page 145: ...144 Chapter6 Options and Accessories Accessories ...
Page 146: ...145 7 Specifications ...
Page 179: ...178 Chapter7 Specifications Regulatory Information ...
Page 180: ...179 8 Required Equipment ...
Page 187: ...186 Chapter8 Required Equipment Test Equipment ...
Page 308: ...307 10 Performance Verification Test Record ...