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Keysight Technologies U9361F, Руководство по измерениям

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U9361C/F/G/M RCal Receiver Calibrator Measurement Guide

 43

Demonstrations 

Demo #4 - Using RCal with the 89600 VSA Software

Compatible Signal Generators:

— N5166B (CXG)
— N517xB (all EXG)
— N518xB (all MXG)
— N519xA (all UXG)
— M9x84B/C (all VXG)
RCal calibrations are supported by 89600 VSA software but must be set up outside of the VSA 

application. Before beginning the following demo, complete 

“Demo #3 – Complex Cal: Improving 

EVM in a 128 QAM Signal” on page 36

 Demo #3 for RCal calibration setup for the uW path.

1.

Start the VSA application.

Mode/Measure

 > 

Launch VSA

2.

Configure the Trace Layout to be a 2x2 grid.

Window

 > 

Trace Layout

 > 

Grid 2x2

3.

Set the Measurement Type to Digital Demod.

Содержание U9361F

Страница 1: ...Keysight Technologies U9361C F G M RCal Receiver Calibrator Measurement Guide...

Страница 2: ...implied warranties of merchantability and fitness for a particular purpose Keysight Technologies shall not be liable for errors contained herein or for incidental or consequential damages in connecti...

Страница 3: ...cting State Mismatches page 17 Best RCal Configuration Practices page 17 Multiple SA Input Ports and RCal Modules page 18 How to Utilize Match State page 18 Multiple Rows Overlap and Dual Corrections...

Страница 4: ...irements X Series Signal Analyzer Software Rev A 27 05 or higher A 29 01 or higher recommended U9361Y_RCL license installed on X Series Signal Analyzer two licenses come with each RCal unit and additi...

Страница 5: ...F input connector or marked in blue for the N9042B A signal analyzer rear panel USB 3 0 port identified with SS or having a blue connector When plugged in the RCal module will boot up accompanied by a...

Страница 6: ...ded between the RCal output and test port where calibration is desired Use the shortest and highest quality connectors possible Mismatch errors can be reduced with small fixed attenuators such as a 6...

Страница 7: ...t customer support via email at csg servicedesk keysight com if you encounter any issues After startup the LEDs indicate the following status messages Status LED RF Out LED 10 MHz Ref LED Off No USB C...

Страница 8: ...utput Calibration Configuration If this tab is missing then the instrument is most likely using an older software revision missing a license or is unsupported See Available RCal Models and Options on...

Страница 9: ...ameters Copy From Cal Group Allows you to import Cal Group settings into the current Cal Group This is useful for calibrating text fixtures that use the same parameters across multiple signal paths Ap...

Страница 10: ...zer s settings or state which can be viewed as an internal path through the analyzer The row with a blue border is active for editing To change the active editing row use the Go to Row button or touch...

Страница 11: ...ibration Apply checkbox Rows that are successfully calibrated will be applied to measurements when selected Name User defined row name Last Calibrated Read only Date and time that last calibration was...

Страница 12: ...Atten Stop Elec Atten Step Defines the range of the electronic attenuator to calibrate All calibrates the entire range of electronic attenuation Elec Atten Step uses the start stop and step range Bypa...

Страница 13: ...ning provides faster tuning speed All calibrates for all PNO modes Phase Noise Optimization offset frequencies vary based on the Synthesizer option EP0 EP1 EP2 W Path Options Low Noise LNP W Presel By...

Страница 14: ...default allows instrument to interpolate and approximate when correction data is close reduces frequency of Apply errors True requires strict match between correction data and instrument settings See...

Страница 15: ...ensuring that the RCal module is connected to the signal path select OK to start the calibration The following is a brief summary of what occurs during the calibration process The RCal configuration s...

Страница 16: ...olumn Applying a Calibration To apply the correction select the Apply column in the row The instrument will compare its current state to all corrections in the active RCal correction pool and apply co...

Страница 17: ...queue history with details RCal Status dialog This table is fully devoted to RCal and provides the greatest detail To open select Input Output menu Calibration Configuration RCal Status In this table...

Страница 18: ...the correction required for the exact hardware acquisition state This conversion is controlled by the Match State parameter within the RCal configuration window If you want to only apply corrections t...

Страница 19: ...e should be followed before every RCal calibration to guarantee the best possible accuracy 1 RCal calibrations are independent of measurement time and temperature which are parameters that are handled...

Страница 20: ...path such that the attenuator is present in both the signal generator to signal analyzer path as well as the RCal to signal analyzer path The switch in the diagram represents changing the physical con...

Страница 21: ...to set up the signal generators address on the signal analyzer in order for the signal analyzer to control the signal generator 1 Connect your signal generator to the LAN or to the SA through GPIB 2 N...

Страница 22: ...This demonstration corrects for loss introduced by a 13 dB attenuator in the signal path Before beginning this demo please follow the guidelines detailed in the Key Steps for Every RCal Calibration o...

Страница 23: ...U9361C F G M RCal Receiver Calibrator Measurement Guide 23 Demonstrations 3 Select Freq and set the Start Freq to 3 GHz and Stop Freq to 4 GHz 4 Select Sweep Sweep Config and set the Points to 101...

Страница 24: ...Amptd 10 dBm 3 Select Sweep Sweep Freq On to enable frequency sweeping 4 Select Return Configure Step Sweep Freq Start 3 GHz and Freq Stop 4 GHz 5 Set Points 101 6 Select More Step Dwell 2 00 msec 7...

Страница 25: ...emonstrations The trace will begin to flatten as the maximum points are saved 3 Once the trace has stabilized save it for comparison by selecting View in the View Blank area 4 Disconnect the RF cable...

Страница 26: ...Configuration window 6 Select Use Current Meas then select the Calibrate check box Calibrate Checked Rows to populate a row using the current measurement settings and run the calibration 7 When calibr...

Страница 27: ...ace In the Select Trace drop down select Trace 2 to verify the calibration by adding another trace 10 Set Trace Type to Max Hold and then in the View Blank area select View Active The trace will begin...

Страница 28: ...a calibration may require adding additional Cal states A signal generator and a signal analyzer connected through USB is required for source control This demo calibrates for a 3 dB attenuator For sig...

Страница 29: ...t Sweep Sweep Config Points 101 to set the number of sweep point to 101 5 Select Meas Setup Source Source Mode Tracking to set up the source control to sweep across the frequency range 6 Select RF Out...

Страница 30: ...RF Output On to enable the RF output of the signal generator 9 Select Trace Select Trace Trace 1 set Trace Type Max Hold and set View Active 10 Once the trace has stabilized save it for comparison by...

Страница 31: ...window 14 Select Use Current Meas Calibrate Calibrate Checked Rows to populate a row using the current measurement settings and run the calibration 15 When the calibration is complete select the Apply...

Страница 32: ...Verify the calibration by adding another trace Navigate to Trace Select Trace Trace 2 Set Trace Type Max Hold and set View Active Wait for the trace to stabilize then select View View to store the tr...

Страница 33: ...n the signal generator through Meas Setup Source RF Output Off 21 Disconnect the cable from the signal generator and connect it to RCal module 22 Navigate to the RCal Calibration Configuration window...

Страница 34: ...he Apply box 26 Disconnect the cable from the RCal module and connect it to the signal generator Enable the RF output on the signal generator through Meas Setup Source RF Output On Now the trace shoul...

Страница 35: ...Cal Receiver Calibrator Measurement Guide 35 Demonstrations Observe the differences between the uncorrected trace Trace 1 the corrected trace Trace 2 and the corrected trace with Preselector Bypass en...

Страница 36: ...nal calibration state to improve measurement flexibility specifically for handling multiple RF paths Normally you would not make digital demodulation measurements through the YTF preselected path howe...

Страница 37: ...Demod application in Vector Modulation Analyzer mode Mode Vector Modulation Analyzer Digital Demod 5 Configure the signal analyzer to demodulate the waveform Ctr Center Frequency 5GHz Format 128 QAM...

Страница 38: ...7 Disable the RF output on the signal generator RF Output Off 8 Disconnect the cable from the signal generator and connect it to the RCal module 9 Navigate to the RCal Calibration Configuration window...

Страница 39: ...set in the signal analyzer meas bar Type Complex Start Stop Freq 5 GHz Freq Points 1 Mech Atten Step Mech Atten Start 10 dB Mech Atten Stop 10 dB Elec Atten Bypass IF Gain Auto IF Path 25 MHz Preamp...

Страница 40: ...nect the cable from the RCal module and connect it to the signal generator Enable the RF output on the signal generator RF Output On The EVM should now be improved as shown in the comparison below 14...

Страница 41: ...15 Disable the RF output on the signal generator RF Output Off 16 Disconnect the cable from the signal generator and connect it to the RCal module 17 Navigate to the RCal Calibration Configuration win...

Страница 42: ...demonstrated for the uW path 20 Disconnect the cable from the RCal module and connect it to the signal generator Enable the RF output on the signal generator RF Output On The EVM is now reduced to 0 1...

Страница 43: ...alibrations are supported by 89600 VSA software but must be set up outside of the VSA application Before beginning the following demo complete Demo 3 Complex Cal Improving EVM in a 128 QAM Signal on p...

Страница 44: ...s Setup Measurement Type General Purpose Digital Demod 4 Open the Digital Demod Properties tab Meas Setup Digital Demod Properties 5 Configure the following measurement parameters under the Format tab...

Страница 45: ...ment Guide 45 Demonstrations 6 Under the Filter tab set the following matched filter parameters Measurement Filter Root Raised Cosine Reference Filter Raised Cosine Alpha BT rolloff 0 5 7 Set the IF P...

Страница 46: ...rations 8 Under the same Extensions window scroll down and enable RCal Corrections RCal Correction Correction 9 Perform an Auto range by selecting the button shown below 10 Exit the input window EVM s...

Страница 47: ...e amplitude accuracy after an RCal calibration compared to a calibration done using a power sensor In this case we used the U5532C sensor module but this demonstration can be done with other types of...

Страница 48: ...rator Measurement Guide Demonstrations 4 Set the number of sweep points to 101 Sweep Sweep Config Points 101 5 Set up source control to automatically sweep across the frequency range Meas Setup Source...

Страница 49: ...ternal Trigger can be selected under the Source Setup Table menu 6 Enable the RF output on the signal generator RF On 7 Prepare to store the uncorrected trace Trace Select Trace Trace 1 Trace Type Max...

Страница 50: ...RF output on the signal generator RF Output Off 10 Disconnect the cable from the signal generator and connect it to the RCal module 11 Navigate to the RCal Calibration Configuration Window Input Outp...

Страница 51: ...Path and W Preselector Bypass are desired Use Current Meas Duplicate Row W Path Control W Presel Bypass 13 Run the calibration after selecting the calibrate parameter Calibrate Calibrate Checked Rows...

Страница 52: ...on the signal generator 18 On the signal generator select Aux Fctn Power Meter Measurements Channel A Setup Connection Settings Connection Type USB then select your Power Meter from the USB Device men...

Страница 53: ...he average difference in results between the Power Sensor and the measurement using an RCal calibration for this test case was 0 192 dBm across the selected measurement span 17 10 12 10 08 0 04 20 10...

Страница 54: ...calibrator control can be accessed within the X Series front panel through Input Output Calibrator Control Calibrator Control Options Cal Source Selects the desired RCal module to control Output Toggl...

Страница 55: ...Calibrator Measurement Guide 55 Demonstrations Example Calibrator Control Outputs CW signal at 10 GHz The amplitude of the signal can be adjusted using external attenuation Comb signal centered at 10...

Страница 56: ...56 U9361C F G M RCal Receiver Calibrator Measurement Guide Demonstrations Comb signal centered at 10 GHz with 100 MHz spacing...

Страница 57: ...correction capabilities clear all close all instrreset clc Define Parameters Here SA_address USB0 0x2A8D 0x0D0B MY49431812 0 INSTR SG_address USB0 0x0957 0x1F01 MY53050777 0 INSTR center_freq 5 freq_s...

Страница 58: ...rations manually then press enter s fprintf my_SA SYST CAL ROW1 STAT ON fprintf my_SA TRAC2 TYPE MAXH input Press Enter when trace 2 stabilized s fprintf my_SA TRAC2 MODE VIEW disp Magnitude Cal Demo...

Страница 59: ...y my_SA DDEM FREQ SYNT Phase Noise Offset IF path Start and Stop Frequency is determined by the IF BW Determine IF path given IF BW Info_BW query my_SA DDEM BAND Info_BW_num str2num Info_BW if Info_BW...

Страница 60: ...A SYST CAL ROW1 EATT TYPE BYP else elec_atten_num str2num elec_atten elec_atten_start num2str elec_atten_num elec_atten_range 2 elec_atten_stop num2str elec_atten_num elec_atten_range 2 elec_atten_ste...

Страница 61: ...t resistance 6 Initial tightening can be done by hand or with an open end wrench Tighten until snug or where the connectors are first making contact The preliminary connection is tight enough when the...

Страница 62: ...fects and damage that cannot be seen without magnification generally have no effect on electrical or mechanical performance Magnification is of great use in analyzing the nature and cause of damage an...

Страница 63: ...l Receiver Calibrator 10 MHz to 50 GHz U9361G RCal Receiver Calibrator 10 MHz to 67 GHz U9361M RCal Receiver Calibrator 10 MHz to 110 GHz U9361x Receiver Calibrator Quick Start Guide U9361x RCal Recei...

Страница 64: ...This information is subject to change without notice Keysight Technologies 2021 2022 Edition 1 October 2022 U9361 90003 www keysight com...

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