
Gating
Gating provides the flexibility of selectively removing time domain responses. The remaining
time domain responses can then be transformed back to the frequency domain. For reflection
(or fault location) measurements, use this feature to remove the effects of unwanted
discontinuities in the time domain. You can then view the frequency response of the remaining
discontinuities. In a transmission measurement, you can remove the effects of multiple
transmission paths.
Figure
shows the frequency response of an electrical airline and termination.
Figure
shows the response in the time domain. The discontinuity on the left is due to the
input connector. The discontinuity on the right is due to the termination.
We
want to remove
the effect of the connector so that we can see the frequency response of just the airline and
termination. Figure
shows the gate applied to the connector discontinuity. Figure
shows the frequency response of the airline and termination, with the connector “gated out.”
OPERATION
Figure 6-75. Sequence of Steps in Gating Operation
Setting
the gate
.
Think of a gate as a
filter in the time domain (see Figure 6-76).
When the gate is on, responses outside the gate are mathematically removed from the time
domain trace. Enter the gate position as a start and stop time (not frequency) or as a center
and span time. The start and stop times are the
-6 cutoff times. Gates can
have a negative span, in which case the responses inside the gate are mathematically removed.
The gate’s start and stop flags
the region where gating is on.
Application and
Содержание HP 8753E
Страница 61: ......
Страница 138: ...Figure 2 62 aw000024 Gating Effects in a Frequency Domain Example Measurement Making Measurements 2 87 ...
Страница 150: ......
Страница 174: ...Figure 3 23 Example Swept Power Conversion Compression Measurement 3 32 Making Mixer Measurements ...
Страница 187: ......
Страница 197: ...4 l 8 Printing Plotting and Saving Measurement Results ...
Страница 245: ......
Страница 249: ......
Страница 256: ......
Страница 277: ...4 lb enter the number of sweeps press Optimizing Measurement Results 5 55 ...
Страница 399: ......
Страница 475: ......
Страница 476: ...pb611ld 8 2 Menu Maps ...
Страница 477: ......
Страница 478: ...84 Menu Maps ...
Страница 480: ......
Страница 487: ......
Страница 488: ...8 14 MenuMaps ...
Страница 489: ...I r RETURN pg657e Menu Maps 8 15 ...
Страница 565: ... Ittble 9 2 Softkey Locations Softkey Front Panel Access Key B 76 Key Definitions ...
Страница 566: ... Ihble 9 2 Softkey Locations continued Key Definitions 8 77 ...
Страница 567: ...9 79 Key Definitions ...
Страница 568: ...Key Definitions 8 78 ...
Страница 569: ... Ihble 9 2 Softkey Locations continued Softkey A i _ 8 80 Key Definitions ...
Страница 570: ...able 9 2 Softkey Locations continued Softkey Front Panel Access Key Key Definitions 9 81 ...
Страница 571: ...Ylhble 9 2 Softkey Locations continued Front Panel Access Key iii3 SJ G J ZiJ GiJ Ical m 9 82 Key Definitions ...
Страница 572: ...lhble 9 2 Softkey Lacations continued Softkey Front Panel Access Key Key Definitions 9 83 ...
Страница 573: ... I ble 9 2 Softkey Locations continued Softkey Front Panel Access K e y 84 I ey Definitions ...
Страница 574: ... lhble 9 2 Softkey Locations continued Softkey Front Panel Access Key Key Definitions g 86 ...
Страница 575: ... lhble 9 2 Softkey Locations continued Softkey FFont Panel Access Key 9 86 Kay Definitions ...
Страница 576: ... ble 9 2 Softkey Locations continued Softkey Front Panel Access Key Key Definitions 9 87 ...
Страница 577: ... lhble 9 2 Softkey Locations continued Softkey Front Fanel Access Key B 88 Key Definitions ...
Страница 578: ...l hble 9 2 Softkey Locations continued Softkey Key Definitiins 8 W ...
Страница 579: ... lhble 9 2 Softkey Locations continued Softkey Front Rmel Access Key WI Key Definitions ...
Страница 580: ... Ihble 9 2 Softkey Locations continued Softkey Front Panel Access Key Key Definitions Ml ...
Страница 581: ... able 9 2 Softkey Locations continued Key Definitions ...
Страница 582: ...able 9 2 Softkey Locations continued Softkey Front Panel Access Key Key Definitions 943 ...
Страница 583: ...7hble 9 2 Softkey Locations continued I Softkey Front Panel Access Key 944 Key Definitions ...
Страница 584: ... Ihble 9 2 Softkey Locations continued Softkey Key Definitions 9 96 ...
Страница 671: ......
Страница 672: ......
Страница 673: ......