R&S FSQ Signal Analyzer - Rohde & Schwarz

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R&S FSQ Instrument Functions Analyzer Mode GATE RANGES The GATED RANGES softkey opens a table to configure up to 3 gate ranges for each trace. Comment Comment string Period Period of the signal to be measured Range x Start Begin of time period to be taken into account Range x Stop End of time period to be taken into account Use Range YES / NO: Allows to temporarily disable a range The timing values have full numerical resolution and are only rounded for display. Remote command: SWE:EGAT:TRACE:COMM SWE:EGAT:TRACE:STAT ON SWE:EGAT:TRACE:STAR SWE:EGAT:TRACE:STOP SWE:EGAT:TRACE:PER Gated statistics configuration example: A statistics evaluation has to be done over the useful part of the signal between t3 and t4. The period of the GSM signal is 4.61536 ms 4.116 Operating Manual 1313.9681.12 - 01
R&S FSQ Instrument Functions t1 External positive trigger slope t2 Begin of burst (after 25 µs) t3 Begin of useful part, to be used for statistics (after 40 µs) t4 End of useful part, to be used for statistics (after 578 µs) t5 End of burst (after 602 µs) The instrument has to be configured as follows: Trigger Offset t2 - t1 = 25 µs now the gate ranges are relative to t2 Range 1 Start t3 - t2 = 15 µs start of range 1 relative to t2 Range 1 End t4 - t2 = 553 µs end of range 1 relative to t2 4.5.13.5 Measurement of Carrier/Noise Ratio C/N and C/No Analyzer Mode Using the carrier/noise measurement function, the R&S FSQ determines the C/N ratio which can also be shown normalized to a 1 Hz bandwidth (function C/No). To determine the noise power, a channel at the set center frequency is examined. The bandwidth of the channel is fixed by means of the CHANNEL BANDWIDTH function. The largest signal in the frequency span is the carrier. It is searched when the function is activated and is marked by means of the REFERENCE FIXED marker. The noise power of the channel is subtracted from the signal level obtained (C/N), and in the case of a C/No measurement it is referred to a 1 Hz bandwidth. There are two methods for measuring the carrier/noise ratio: 1. The carrier is outside the channel examined: In this case, it is sufficient to switch on the desired measurement function and to set the channel bandwidth. The carrier/noise ratio is displayed on the screen. 2. The carrier is inside the channel examined: In this case, the measurement must be performed in two steps. First, the reference measurement is performed with the carrier being active. This is done by switching on either the C/N or the C/No measurement and waiting for the end of the next measurement run. Then, the carrier is switched off so that only the noise of the test setup is active in the channel. The carrier/noise ratio is displayed after the subsequent measurement has been completed. The ADJUST SETTINGS function facilitates the selection of the frequency span appropriate for the channel bandwidth: it automatically sets the SPAN to approx. 4 × channel bandwidth. The RMS detector is enabled when the power measurement is switched on (TRACE-DETECTOR-RMS). Operating Manual 1313.9681.12 - 01 4.117
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R&S ® FSQ Signal Analyzer Operatin
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Basic Safety Instructions Always re
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Electrical safety Basic Safety Inst
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Repair and service Basic Safety Ins
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Informaciones elementales de seguri
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Seguridad eléctrica Informaciones
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Customer Information Regarding Prod
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Customer Support Technical support
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R&S FSQ Documentation Overview Tabb
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R&S FSQ Putting into Operation 1 Pu
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R&S FSQ Getting Started Measurement
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R&S FSQ Instrument Functions 4 Inst
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R&S FSQ Instrument Functions 4.8.4
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R&S FSQ Instrument Functions R&S FS
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R&S FSQ Instrument Functions Table
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R&S FSQ Instrument Functions DETECT
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R&S FSQ Instrument Functions DETECT
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R&S FSQ Error Messages 9 Error Mess
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R&S FSQ Error Messages Error code E
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R&S FSQ Index Index Symbols * (enha
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R&S FSQ Index I I/Q modulation . .
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R&S FSQ Index device . . . . . . .
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R&S FSQ Index GATED TRIGGER . . 4.3
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R&S FSQ Index SOURCE ON/OFF. . . .
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R&S FSQ Index Operating Manual 1313
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R&S FSQ Signal Analyzer - Rohde & Schwarz

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