98
Chapter 4
Front-Panel Key Reference
Search
from identifying noise as signals, reduce the noise floor variance to a
value less than the peak-excursion value by reducing the video
bandwidth or by using video averaging. Key Access:
Search
Pk Threshold
sets a lower boundary to the active trace. The threshold line “clips”
signals that appear below the line when this function is on. The
boundary is defined in amplitude units that correspond to its vertical
position when compared to the reference level. In other words, if the
reference level is -10 dBm, and the threshold is set to
−
75 dBm, the
threshold will remain 65 dB below the reference level as the reference
level is changed.
The value of the threshold appears in the active-function block and on
the lower- left side of the display. The threshold level does not influence
the trace memory or marker position. The peaks found by the markers
must be at least the peak- excursion value above the threshold level.
The value of the threshold level can be changed using the step keys, the
knob, or the numeric keypad. Pressing any digit, 0 through 9, on the
numeric keypad brings up the selected terminator menu. The threshold
value affects peak searching functions (except for
Peak Search
) even
when the
Pk Threshold
function is set to
On
. Key Access:
Search
,
More
Pk-Pk Search
finds and displays the frequency and amplitude differences between the
highest and lowest trace points. Pressing
Pk-Pk Search
performs the
routine similar to pressing the following keys:
Peak Search
,
Mkr
∆
, and
Mkr
→
Min
. Key Access:
Search, More
Min Search
moves the active marker to the minimum detected amplitude value.
Key Access:
Search, More
Mkr
→
Start
changes the start frequency so that it is equal to the frequency of the
active marker. This moves the active marker to the left edge of the
display. Key Access:
Search, More
Mkr
→
Stop
changes the stop frequency so that it is equal to the frequency of the
active marker. This moves the active marker to the right edge of the
display. Key Access:
Search
,
More
Mkr
→
CF Step
changes the center-frequency step size to match the value of the active
marker. Press
Frequency
then
CF Step Auto Man
to view the step size. If
marker delta is active, the step size will be set to the frequency
difference between the markers. Key Access:
Search
,
More
Mkr
∆ →
Span
sets the start and stop frequencies to the values of the delta markers.
The start and stop frequencies will not be set if the delta marker is off.
Key Access:
Search
,
More
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 ...