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8. Specifications and test methods
8.5 Performance characteristics test
662
Fig. 8.6 Schematic diagram of maximum analysis bandwidth test
2)
Set the 4051 analyzer as I/Q analysis mode and the frequency domain window as current window. Set the
center frequency as 1 GHz and the analysis bandwidth as 10 MHz.
3)
Set the frequency of synthesized signal generator#1 as 1 GHz and the amplitude as -10 dBm; execute
Marker Delta and turn off the output of signal generator #1. Set the frequency of synthesized signal
generator#2as 1 GHz and the amplitude as -10 dBm; adjust the output of signal generator#2 to ensure the
Marker Delta reading is closest to 0 dB.
4)
Gradually reduce the frequency of signal generator #2 and execute Peak Search. If the marker amplitude
reading is less than -3 dB, note the current output frequency of the signal generator as left limit value,
otherwise record the frequency value at the left-most graticule of the 4051 analyzer screen and record the
result in the fL column in the 4051 Auxiliary Form.
5)
Turn off the output of signal generator #2 and turn on the output of signal generator#1.
6)
Turn on and gradually increase the frequency of signal generator #1 and execute Peak Search. If the
marker amplitude reading is less than -3 dB, note the current output frequency of the signal generator as
right limit value, otherwise record the frequency value at the right-most graticule of the 4051 analyzer
screen and record the result in the fR column in the 4051 Auxiliary Form.
7)
If bandwidth option H38A or H38B is available, repeat step 2 ~ 6 based on the set value of relevant
analysis bandwidth in B7 of the 4051 Auxiliary Form.
d)
Test records and data processing
8)
Calculate the maximum analysis bandwidth measurement value BWMAX according to the formula (14)
and record the result in the 4051 Record Sheet. Otherwise, the record will be considered not compliant
with relevant requirements.
Where, f R refers to the right limit value (MHz);
f
L
refers to the left limit value (MHz).
8.5.1.1.12 Video bandwidth
a)
Test items
The video bandwidth refers to the bandwidth of the tunable low-pass filter in the video circuit behind the
detector of the signal/spectrum analyzer. The video filter is the low-pass filter located behind the detector for
defining the bandwidth of the video amplifier. It can smooth the noise and is used to average or smooth traces.
Besides, it can easily detect weak signals in noises. Change of the video bandwidth does not affect the
frequency resolution of the 4051 analyzer, but too narrow video bandwidth may lead to increase in the sweep
Содержание 4051 Series
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Страница 203: ...5 Menu 5 1 Menu structure 189 5 1 2 10 Measurement Control Meas Ctrl Restart Pause Fig 5 2 10 Measurement Control Menu...
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Страница 226: ...5 Menu 5 1 Menu structure 212 5 1 3 14 Marker Function Marker Func Fig 5 3 14 Marker Function Menu...
Страница 230: ...5 Menu 5 1 Menu structure 216 5 1 4 3 Span X Axis Span Span 3 000000 MHz Full Span Last Span Fig 5 4 3 Span Menu...
Страница 241: ...5 Menu 5 1 Menu structure 227 5 1 4 13 Maker Mkr Fig 5 4 13 Marker Menu...
Страница 242: ...5 Menu 5 1 Menu structure 228 5 1 4 14 Marker Function Marker Func Fig 5 4 14 Marker Function Menu...
Страница 246: ...5 Menu 5 1 Menu structure 232 5 1 5 3 Span X Axis Span Span 8 000000 MHz Full Span Last Span Fig 5 5 3 Span Menu...
Страница 259: ...5 Menu 5 1 Menu structure 245 5 1 5 13 Maker Mkr Fig 5 5 13 Marker Menu...
Страница 260: ...5 Menu 5 1 Menu structure 246 5 1 5 14 Marker Function Marker Func Fig 5 5 14 Marker Function Menu...
Страница 264: ...5 Menu 5 1 Menu structure 250 5 1 6 3 Span X Scale Span X Scale Scale Div 2 00dB Fig 5 6 3 Span Menu...
Страница 265: ...5 Menu 5 1 Menu structure 251 5 1 6 4 Bandwidth BW Measure BW 1 000000MHz Fig 5 6 4 Bandwidth Menu...
Страница 266: ...5 Menu 5 1 Menu structure 252 5 1 6 5 Sweep Sweep Fig 5 6 5 Sweep Menu...
Страница 272: ...5 Menu 5 1 Menu structure 258 5 1 6 10 Auto Setting Auto Set Couple All Fig 5 6 10 Auto Setting Menu...
Страница 275: ...5 Menu 5 1 Menu structure 261 5 1 6 13 Maker Mkr Fig 5 6 13 Marker Menu...
Страница 276: ...5 Menu 5 1 Menu structure 262 5 1 6 14 Marker Function Marker Func Fig 5 6 14 Marker Function Menu...
Страница 277: ...5 Menu 5 1 Menu structure 263 5 1 6 15 Peak Search Peak Search Fig 5 6 15 Peak Search Menu...
Страница 280: ...5 Menu 5 1 Menu structure 266 5 1 7 3 Span X Scale Span Fig 5 7 3 Span Menu...
Страница 282: ...5 Menu 5 1 Menu structure 268 5 1 7 5 Sweep Sweep Sweep Time 400 00 ms Man Sweep Points 1001 Auto Fig 5 7 5 Sweep Menu...
Страница 291: ...5 Menu 5 1 Menu structure 277 5 1 7 13 Maker Mkr Fig 5 7 13 Marker Menu...
Страница 292: ...5 Menu 5 1 Menu structure 278 5 1 7 14 Marker Function Marker Func Fig 5 7 14 Marker Function Menu...
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Страница 297: ...5 Menu 5 1 Menu structure 283 5 1 8 4 Bandwidth BW Res BW 30 00 kHz Man Auto Fig 5 8 4 Bandwidth Menu...
Страница 298: ...5 Menu 5 1 Menu structure 284 5 1 8 5 Sweep Sweep Sweep Time 400 00 ms Man Auto Fig 5 8 5 Sweep Menu...
Страница 301: ...5 Menu 5 1 Menu structure 287 5 1 8 7 Trace Trace Select Trace Trace 1 Clear Write Trace Average Fig 5 8 7 Trace Menu...
Страница 306: ...5 Menu 5 1 Menu structure 292 5 1 8 12 Marker Marker Fig 5 8 12 Marker Menu...
Страница 307: ...5 Menu 5 1 Menu structure 293 5 1 8 13 Maker Mkr Fig 5 8 13 Marker Menu...
Страница 308: ...5 Menu 5 1 Menu structure 294 5 1 8 14 Marker Function Marker Func Fig 5 8 14 Marker Function Menu...
Страница 309: ...5 Menu 5 1 Menu structure 295 5 1 8 15 Peak Search Peak Search Fig 5 8 15 Peak Search Menu...
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Страница 326: ...5 Menu 5 1 Menu structure 312 5 1 10 Spurious emission 5 1 10 1 Frequency Frequency Fig 5 10 1 Frequency Menu...
Страница 328: ...5 Menu 5 1 Menu structure 314 5 1 10 3 Span X Scale Span Fig 5 10 3 Span Menu...
Страница 329: ...5 Menu 5 1 Menu structure 315 5 1 10 4 Bandwidth BW Fig 5 10 4 Bandwidth Menu...
Страница 333: ...5 Menu 5 1 Menu structure 319 5 1 10 7 Trace Trace Fig 5 10 7 Trace Menu...
Страница 337: ...5 Menu 5 1 Menu structure 323 5 1 10 10 Auto Setting Auto Set Couple All Fig 5 10 10 Auto Setting Menu...
Страница 340: ...5 Menu 5 1 Menu structure 326 5 1 10 13 Maker Mkr Fig 5 10 13 Marker Menu...
Страница 341: ...5 Menu 5 1 Menu structure 327 5 1 10 14 Marker Function Marker Func Fig 5 10 14 Marker Function Menu...
Страница 345: ...5 Menu 5 1 Menu structure 331 5 1 11 3 Span X Scale Span Fig 5 11 3 Span Menu...
Страница 354: ...5 Menu 5 1 Menu structure 340 5 1 11 10 Auto Setting Auto Set Couple All Fig 5 11 10 Auto Setting Menu...
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