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4 Input/Output Functions
Input/Output
by one of the three ways:
•
by using the Restore Input/Output Defaults key on the first page of the input/output menu,
•
by using the System->Restore System Defaults->Input/Output Settings or,
•
by using the System -> Restore System Defaults->All. Also, they survive a Preset and a Power cycle.
A very few of the Input/Output settings do respond to a Mode Preset; for example, if the Calibrator is on it
turns off on a Preset, and if DC coupling is in effect it switches to AC on a Preset. These exceptions are
made in the interest of reliability and usability, which overrides the need for absolute consistency.
Exceptions are noted in the SCPI table for the excepted functions.
RF Input
Selects the front-panel RF input port to be the analyzer signal input. If RF is already selected, pressing this
key accesses the RF input setup functions.
Key Path
Input/Output
Example
[:SENSe]:FEED RF
Couplings
The act of connecting the U7227A USB Preamplifier to one of the analyzer’s USB ports will cause
the Input to automatically switch to the RF Input. If the RF Calibrator is on, it is turned off.
Subsequently disconnecting the USB Preamp from USB does not change the Input selection nor
restore the previous selection.
Readback
The RF input port, RF coupling, and current input impedance settings appear on this key as:
"XX, YY, ZZ" where
XX is RF, RF2, RFIO1, RFIO2, depending on what input is selected (only appears on analyzers with
multiple RF inputs)
YY is AC or DC
ZZ is 50Ω or 75Ω
Initial S/W Revision
Prior to A.02.00
Modified at S/W Revision
A.14.00
Input Z Correction
Sets the input impedance for unit conversions. This affects the results when the y-axis unit is voltage or
current units (dBmV, dBµV, dBµA, V, A), but not when it is power units (dBm, W). The impedance you select
is for computational purposes only, since the actual impedance is set by internal hardware to 50 ohms.
Setting the computational input impedance to 75 ohms is useful when using a 75 ohm to 50 ohm adapter to
measure a 75 ohm device on an analyzer with a 50 ohm input impedance.
There are a variety ways to make 50 to 75 ohm transitions, such as impedance transformers or minimum
loss pads. The choice of the solution that is best for your measurement situation requires balancing the
amount of loss that you can tolerate with the amount of measurement frequency range that you need. If
you are using one of these pads/adaptors with the Input Z Corr function, you might also want to use the
Ext Gain key. This function is used to set a correction value to compensate for the gain (loss) through your
pad. This correction factor is applied to the displayed measurement values.
192
W-CDMA & HSPA Measurement Applications Reference
Содержание E6640A
Страница 80: ...Table of Contents lxxx W CDMA HSPA Measurement Applications Reference ...
Страница 188: ...3 Programming the Test Set Common Commands 188 W CDMA HSPA Measurement Applications Reference ...
Страница 189: ...4 Input Output Functions Undefined variable Primary ProductName W CDMA HSPA Measurement Applications Reference 189 ...
Страница 231: ...5 Mode Functions Undefined variable Primary ProductName W CDMA HSPA Measurement Applications Reference 231 ...
Страница 256: ...5 Mode Functions Mode Setup 256 W CDMA HSPA Measurement Applications Reference ...
Страница 257: ...6 System Functions Undefined variable Primary ProductName W CDMA HSPA Measurement Applications Reference 257 ...
Страница 324: ...6 System Functions System 324 W CDMA HSPA Measurement Applications Reference ...
Страница 325: ...7 Trigger Functions Undefined variable Primary ProductName W CDMA HSPA Measurement Applications Reference 325 ...
Страница 369: ...8 Channel Power Measurement Auto Couple W CDMA HSPA Measurement Applications Reference 369 ...
Страница 376: ...8 Channel Power Measurement File File See File on page 258 376 W CDMA HSPA Measurement Applications Reference ...
Страница 389: ...8 Channel Power Measurement Marker W CDMA HSPA Measurement Applications Reference 389 ...
Страница 429: ...8 Channel Power Measurement Mode Mode See Mode on page 232 W CDMA HSPA Measurement Applications Reference 429 ...
Страница 435: ...8 Channel Power Measurement Print Print See Print on page 263 W CDMA HSPA Measurement Applications Reference 435 ...
Страница 629: ...8 Channel Power Measurement System System See System on page 264 W CDMA HSPA Measurement Applications Reference 629 ...
Страница 664: ...9 ACP Measurement Auto Couple 664 W CDMA HSPA Measurement Applications Reference ...
Страница 669: ...9 ACP Measurement BW W CDMA HSPA Measurement Applications Reference 669 ...
Страница 672: ...9 ACP Measurement File File See File on page 258 672 W CDMA HSPA Measurement Applications Reference ...
Страница 754: ...9 ACP Measurement Mode Mode See Mode on page 232 754 W CDMA HSPA Measurement Applications Reference ...
Страница 758: ...9 ACP Measurement Mode Setup Mode Setup See Mode Setup on page 251 758 W CDMA HSPA Measurement Applications Reference ...
Страница 762: ...9 ACP Measurement Print Print See Print on page 263 762 W CDMA HSPA Measurement Applications Reference ...
Страница 960: ...9 ACP Measurement System System See System on page 264 960 W CDMA HSPA Measurement Applications Reference ...
Страница 973: ...9 ACP Measurement View Display DTMB and CMMB Exciter W CDMA HSPA Measurement Applications Reference 973 ...
Страница 984: ...9 ACP Measurement View Display 984 W CDMA HSPA Measurement Applications Reference ...
Страница 1001: ...10 Spectrum Emission Mask Measurement W CDMA HSPA Measurement Applications Reference 1001 ...
Страница 1009: ...10 Spectrum Emission Mask Measurement Auto Couple W CDMA HSPA Measurement Applications Reference 1009 ...
Страница 1013: ...10 Spectrum Emission Mask Measurement File File See File on page 258 W CDMA HSPA Measurement Applications Reference 1013 ...
Страница 1090: ...10 Spectrum Emission Mask Measurement Mode Mode See Mode on page 232 1090 W CDMA HSPA Measurement Applications Reference ...
Страница 1096: ...10 Spectrum Emission Mask Measurement Print Print See Print on page 263 1096 W CDMA HSPA Measurement Applications Reference ...
Страница 1134: ...10 Spectrum Emission Mask Measurement Save 1134 W CDMA HSPA Measurement Applications Reference ...
Страница 1295: ...10 Spectrum Emission Mask Measurement System System See System on page 264 W CDMA HSPA Measurement Applications Reference 1295 ...
Страница 1332: ...10 Spectrum Emission Mask Measurement View Display 1332 W CDMA HSPA Measurement Applications Reference ...
Страница 1343: ...11 Occupied Bandwidth Measurement Auto Couple W CDMA HSPA Measurement Applications Reference 1343 ...
Страница 1350: ...11 Occupied Bandwidth Measurement File File See File on page 258 1350 W CDMA HSPA Measurement Applications Reference ...
Страница 1398: ...11 Occupied Bandwidth Measurement Mode Mode See Mode on page 232 1398 W CDMA HSPA Measurement Applications Reference ...
Страница 1404: ...11 Occupied Bandwidth Measurement Print Print See Print on page 263 1404 W CDMA HSPA Measurement Applications Reference ...
Страница 1598: ...11 Occupied Bandwidth Measurement Sweep Control 1598 W CDMA HSPA Measurement Applications Reference ...
Страница 1599: ...11 Occupied Bandwidth Measurement System System See System on page 264 W CDMA HSPA Measurement Applications Reference 1599 ...
Страница 1610: ...11 Occupied Bandwidth Measurement View Display For TD SCDMA mode only 1610 W CDMA HSPA Measurement Applications Reference ...
Страница 1611: ...11 Occupied Bandwidth Measurement View Display For Bluetooth mode only W CDMA HSPA Measurement Applications Reference 1611 ...
Страница 1620: ...11 Occupied Bandwidth Measurement View Display 1620 W CDMA HSPA Measurement Applications Reference ...
Страница 1668: ...12 Code Domain Measurement Auto Couple 1668 W CDMA HSPA Measurement Applications Reference ...
Страница 1672: ...12 Code Domain Measurement File File See File on page 258 1672 W CDMA HSPA Measurement Applications Reference ...
Страница 1762: ...12 Code Domain Measurement Mode Mode See Mode on page 232 1762 W CDMA HSPA Measurement Applications Reference ...
Страница 1766: ...12 Code Domain Measurement Mode Setup Mode Setup See Mode Setup on page 251 1766 W CDMA HSPA Measurement Applications Reference ...
Страница 1769: ...12 Code Domain Measurement Print Print See Print on page 263 W CDMA HSPA Measurement Applications Reference 1769 ...
Страница 1937: ...12 Code Domain Measurement System System See System on page 264 W CDMA HSPA Measurement Applications Reference 1937 ...
Страница 2019: ...13 Modulation Accuracy Composite EVM Measurement Auto Couple W CDMA HSPA Measurement Applications Reference 2019 ...
Страница 2350: ...13 Modulation Accuracy Composite EVM Measurement View Display 2350 W CDMA HSPA Measurement Applications Reference ...
Страница 2354: ...14 QPSK EVM Measurement 2354 W CDMA HSPA Measurement Applications Reference ...
Страница 2364: ...14 QPSK EVM Measurement Auto Couple 2364 W CDMA HSPA Measurement Applications Reference ...
Страница 2369: ...14 QPSK EVM Measurement File File See File on page 258 W CDMA HSPA Measurement Applications Reference 2369 ...
Страница 2418: ...14 QPSK EVM Measurement Mode Mode See Mode on page 232 2418 W CDMA HSPA Measurement Applications Reference ...
Страница 2422: ...14 QPSK EVM Measurement Mode Setup Mode Setup See Mode Setup on page 251 2422 W CDMA HSPA Measurement Applications Reference ...
Страница 2426: ...14 QPSK EVM Measurement Print Print See Print on page 263 2426 W CDMA HSPA Measurement Applications Reference ...
Страница 2593: ...14 QPSK EVM Measurement System System See System on page 264 W CDMA HSPA Measurement Applications Reference 2593 ...
Страница 2630: ...15 Power Control Measurement File File See File on page 258 2630 W CDMA HSPA Measurement Applications Reference ...
Страница 2677: ...15 Power Control Measurement Mode Mode See Mode on page 232 W CDMA HSPA Measurement Applications Reference 2677 ...
Страница 2682: ...15 Power Control Measurement Print Print See Print on page 263 2682 W CDMA HSPA Measurement Applications Reference ...
Страница 2849: ...15 Power Control Measurement System System See System on page 264 W CDMA HSPA Measurement Applications Reference 2849 ...