74
Chapter 4
Front-Panel Key Reference
Det/Demod
Det/Demod
Det/Demod
accesses the softkeys controlling demodulation functions,
detector functions, the speaker, and dwell time.
Detector
accesses the
Detector
menu keys which allow you to select between
Peak
,
Sample
, and
Negative Peak
detection. When sample detection is
selected,
Smpl
appears in the upper-left corner of the screen. Sample
detection is used primarily to display noise or noise-like signals. This
detection should not be used to make the most accurate amplitude
measurement of non noise-like signals. In sample mode, the
instantaneous signal value at the present display point is placed in
memory. Sample detection is activated automatically for noise level
markers or during video averaging.
When peak detection is selected,
Peak
appears in the upper-left corner
of the screen. Peak detection is used primarily when measuring signals
out of the noise floor. Peak detection obtains the maximum video signal
between the last display point and the present display point and stores
this value in memory. Peak detection is selected at power on and by
pressing
Preset
.
Negative peak detection functions the same as peak detection, but
selects the minimum video signal. When Negative Peak is selected,
Neg
appears in the upper- left corner of the screen. Negative peak detection
is used to find signals that are close to, but below the noise floor. This
detection should not be used to make the most accurate amplitude
measurements of signals. Key Access:
Det/Demod
Demod
accesses the softkeys to select
AM
demodulation or turn demodulation
Off
. Key Access:
Det/Demod
Speaker On Off
turns the internal speaker on and off. The volume from the speaker is
controlled by the front-panel volume control knob. Pressing
Preset
sets
Speaker On Off
to On.
NOTE
It is normal to hear clicking sounds when the Auto Alignment function
is On and the analyzer is in Zero Span. During retrace, a small portion
of the analyzer circuitry is realigned using relays. It is the rapid
switching of these relays during retrace that causes the clicking sounds.
To eliminate the clicking sounds, set Auto Alignment Off. When this is
done, the Align Now All function should be performed periodically.
Refer to “Specifications and Characteristics” for more information on
how often to perform Align Now All when Auto Align is Off.
Key Access:
Det/Demod
Содержание ESA-L1500A
Страница 12: ...11 1 Preparing for Use and Printing ...
Страница 28: ...27 2 Getting Started ...
Страница 44: ...Chapter 2 43 Getting Started Making a Measurement Figure 2 5 Reading the Amplitude and Frequency ...
Страница 47: ...46 Chapter2 Getting Started Analyzer Battery Information ...
Страница 48: ...47 3 Troubleshooting ...
Страница 54: ...Chapter 3 53 Troubleshooting How to Return Your Analyzer for Service Figure 3 1 ...
Страница 117: ...116 Chapter4 Front Panel Key Reference Trig ...
Страница 118: ...117 5 Menu Maps ...
Страница 119: ...118 Chapter5 Menu Maps ...
Страница 120: ...Chapter 5 119 Menu Maps ...
Страница 121: ...120 Chapter5 Menu Maps ...
Страница 122: ...Chapter 5 121 Menu Maps ...
Страница 124: ...Chapter 5 123 Menu Maps ...
Страница 125: ...124 Chapter5 Menu Maps ...
Страница 127: ...126 Chapter5 Menu Maps a Frequency is replaced with Time when the X Axis Units Freq Time selection is Time ...
Страница 128: ...Chapter 5 127 Menu Maps ...
Страница 129: ...128 Chapter5 Menu Maps ...
Страница 130: ...Chapter 5 129 Menu Maps ...
Страница 131: ...130 Chapter5 Menu Maps ...
Страница 135: ...134 Chapter5 Menu Maps ...
Страница 136: ...135 6 Options and Accessories ...
Страница 145: ...144 Chapter6 Options and Accessories Accessories ...
Страница 146: ...145 7 Specifications ...
Страница 179: ...178 Chapter7 Specifications Regulatory Information ...
Страница 180: ...179 8 Required Equipment ...
Страница 187: ...186 Chapter8 Required Equipment Test Equipment ...
Страница 308: ...307 10 Performance Verification Test Record ...
Страница 321: ...320 Chapter10 Performance Verification Test Record HP ESA L1500A Performance Verification Test Record ...