Related Manuals for Agilent Technologies N9020A
Summary of Contents for Agilent Technologies N9020A
- Page 1 Agilent X-Series Signal Analyzer This manual provides documentation for the following X-Series Analyzers: MXA Signal Analyzer N9020A EXA Signal Analyzer N9010A N9079A TD-SCDMA with HSPA/8PSK Measurement Application Measurement Guide Agilent Technologies...
- Page 2 Notices © Agilent Technologies, Inc. 2007-2008 Manual Part Number (June 1995), or as a “commercial item” as defined in FAR 2.101(a) or as “Restricted No part of this manual may be reproduced N9079-90005 computer software” as defined in FAR in any form or by any means (including Supersedes:N9079-90006 52.227-19 (June 1987) or any equivalent...
- Page 3 This Agilent technologies instrument product is warranted against defects in material and workmanship for a period of one year from the date of shipment. during the warranty period, Agilent Technologies will, at its option, either repair or replace products that prove to be defective.
- Page 5 Contents 1. Making TD-SCDMA with HSPA/8PSK Measurements Setting Up and Making a Measurement......... . 10 Making the Initial Signal Connection .
- Page 6 Contents 8. Power Statistics CCDF Measurements Configuring the Measurement System..........58 Setting the BTS (Example) .
- Page 7 Contents Waveform Signal Envelope Views of I only or Q only ......106...
- Page 8 Contents...
- Page 9 Making TD-SCDMA with HSPA/8PSK Measurements This chapter begins with instructions common to all measurements, then details all the measurements available by pressing the Meas when the mode is selected. TD-SCDMA with HSPA/8PSK If you only install Option N9079-1FP, press to select the NOTE TD-SCDMA TD-SCDMA mode.
- Page 10 Making TD-SCDMA with HSPA/8PSK Measurements Setting Up and Making a Measurement Setting Up and Making a Measurement Making the Initial Signal Connection Before connecting a signal to the analyzer, make sure the analyzer can CAUTION safely accept the signal level provided. The signal level limits are marked next to the RF Input connectors on the front panel.
- Page 11 Making TD-SCDMA with HSPA/8PSK Measurements Setting Up and Making a Measurement Table 1-1 The 3 Steps to Set Up and Make a Measurement Step Action Notes 2. Select and Set Up a. Press The measurement begins as soon Meas. the Measurement as any required trigger b.
- Page 12 Making TD-SCDMA with HSPA/8PSK Measurements Setting Up and Making a Measurement Chapter 1...
- Page 13 Transmit Power Measurements This section explains how to make a Transmit Power measurement on a TD-SCDMA base transceiver station (BTS), a mobile station (MS), a repeater or a power amplifier (PA). This test measures the average RF power present in the channel. There are three methods to determine the power level: •...
- Page 14 Transmit Power Measurements Configuring the Measurement System Configuring the Measurement System The BTS under test have to be set to transmit the RF power remotely through the system controller. This transmitting signal is connected to the analyzer RF input port. Connect the equipment as shown. Figure 2-1 Transmit Power Measurement System 1.
- Page 15 Transmit Power Measurements Setting the BTS (Example) Setting the BTS (Example) From the BTS and the system controller, set up a call using loopback mode for the BTS to transmit the RF power as follows: Frequency: 2.0 GHz −20 dBm Output Power: Carrier Number: 1 Switching Point: 3...
- Page 16 Transmit Power Measurements Measurement Procedure Measurement Procedure Step 1. Press Mode TD-SCDMA with HSPA/8PSK to enable the TD-SCDMA mode measurements. Step 2. Press to preset the analyzer. Mode Preset −dB Step 3. Press Input/Output External Gain and enter the number and according to the external attenuator connected to the analyzer.
- Page 17 Transmit Power Measurements Measurement Procedure Meas Interval and increase the Threshold Lvl until a valid result is displayed. For more details about changing measurement parameters, see N9079A TD-SCDMA with HSPA/8PSK User’s and Programmer’s Reference. If you have a problem, and get an error message, see the “Instrument Messages Guide”.
- Page 18 Transmit Power Measurements Measurement Results Measurement Results Figure 2-2 shows the Transmit Power in single timeslot. The Output Power is displayed on the left of the text window and on the right under the heading Current Data Output Pwr. If averaging is turned off, the two values will be the same.
- Page 19 Transmit Power Measurements Measurement Results Figure 2-3 shows the Transmit Power measured by burst width. Full Burst Width and Measured Width (Burst Width) are displayed in the text window, as well as the Threshold levels used to calculate the burst center. When the default Burst Width is inappropriate to perform a measurement, it’s recommended to increase the Meas Interval and Threshold Lvl or to manually enter the desired Burst Width value.
- Page 20 Transmit Power Measurements Troubleshooting Hints Troubleshooting Hints Low output power can lead to poor coverage and intermittent service for phone users. Out of specification power measurements indicate a fault usually in the power amplifier circuitry. They can also provide early indication of a fault with the power supply, for example the battery in the case of mobile stations.
- Page 21 ACP Measurements This chapter explains how to make the Adjacent Channel Power (ACP) measurement on a TD-SCDMA base transceiver station (BTS), a mobile station (MS), a TD-SCDMA repeater or a power amplifier (PA). ACP is a measurement of the amount of interference, or power, in an adjacent frequency channel.
- Page 22 ACP Measurements Configuring the Measurement System Configuring the Measurement System The BTS under test must be set to transmit the RF power remotely through the system controller. This transmitting signal is connected to the RF input port of the analyzer. Connect the equipment as shown. Figure 3-1 Adjacent Channel Power Measurement System 1.
- Page 23 ACP Measurements Setting the BTS (Example) Setting the BTS (Example) From the BTS and the system controller, set up a call using loopback mode for the BTS to transmit the RF power as follows: Frequency: 2.0 GHz Output Power: −20 dBm Carrier Number: 1 Switching Point: 3 Scramble Code: 0...
- Page 24 ACP Measurements Measurement Procedure Measurement Procedure Step 1. Press to enable the TD-SCDMA mode Mode TD-SCDMA with HSPA/8PSK measurements. Step 2. Press to preset the analyzer. Mode Preset −dB Step 3. Press and enter the number and Input/Output External Gain according to the external attenuator connected to the analyzer.
- Page 25 ACP Measurements Measurement Procedure Messages Guide”. Chapter 3...
- Page 26 ACP Measurements Measurement Results Measurement Results Press , and toggle the key to to see the bar View/Display Bar Graph graph with the spectrum trace graph overlay. The text window shows the absolute total power reference, while the lower and upper offset channel power levels are displayed in both absolute and relative readings.
- Page 27 ACP Measurements Measurement Results Figure 3-4 shows a ACP measurement example with 12 carriers. Figure 3-4 ACP - Multiple Carriers Chapter 3...
- Page 28 ACP Measurements Measurement Results Chapter 3...
- Page 29 Power vs. Time Measurements This section explains how to make a TD-SCDMA Power vs Time (PvT) measurement on a TD-SCDMA base transceiver station (BTS), a TD-SCDMA repeater or a power amplifier (PA). Good PvT measurement results verify that the transmitter output power has the correct amplitude, shape, and timing for the TD-SCDMA format.
- Page 30 Power vs. Time Measurements Configuring the Measurement System Configuring the Measurement System This example shows a BTS under test set up to transmit RF power, and being controlled remotely by a system controller. The transmitting signal is connected to the analyzer RF input port. Connect the equipment as shown.
- Page 31 Power vs. Time Measurements Setting the BTS (Example) Setting the BTS (Example) From the base transmission station simulator and the system controller, set up a call using loopback mode for the BTS to transmit the RF power as follows: Frequency: 2.0 GHz Output Power: −20 dBm Carrier Number: 1...
- Page 32 Power vs. Time Measurements Measurement Procedure Measurement Procedure Step 1. Press to enable the TD-SCDMA with Mode TD-SCDMA with HSPA/8PSK HSPA/8PSK mode measurements. Step 2. Press to preset the analyzer. Mode Preset −dB Step 3. Press and enter the number and Input/Output External Gain according to the external attenuator connected to the analyzer.
- Page 33 Power vs. Time Measurements Measurement Procedure You can also set the IF Gain to which selects under Auto High Gain any of the following Auto Rules: — The input attenuator is set to 0 dB. — The Preamp is turned on. —...
- Page 34 Power vs. Time Measurements Measurement Results Measurement Results Figure 4-2 shows the Power vs Time in single timeslot. The Mean Power is displayed on the left of the text window. If Meas Interval is set to 2 or above, Burst Width will be displayed on the right and the Avg Pwr and Slot Width of the each active timeslot are shown in the box below.
- Page 35 Power vs. Time Measurements Measurement Results Figure 4-2 shows the Power vs Time zoomed in window. Figure 4-4 Power vs. Time - Zoom in (Ref Value = 105μs, Scale/Div = 3μs) Chapter 4...
- Page 36 Power vs. Time Measurements Troubleshooting Hints Troubleshooting Hints If a transmitter fails the Power vs. Time measurement this usually indicates a problem with the units output amplifier or leveling loop. Chapter 4...
- Page 37 Spectrum Emission Mask Measurements This chapter explains how to make the spectrum emission mask (SEM) measurement on a TD-SCDMA base transceiver station (BTS), a TD-SCDMA repeater or a power amplifier (PA). SEM compares the total power level within the defined carrier bandwidth and the given offset channels on both sides of the carrier frequency, to levels allowed by the standard.
- Page 38 Spectrum Emission Mask Measurements Configuring the Measurement System Configuring the Measurement System The BTS under test must be set to transmit the RF power remotely through the system controller. This transmitting signal is connected to the RF input port of the instrument. Connect the equipment as shown. Figure 5-1 Spectrum Emission Mask Measurement System 1.
- Page 39 Spectrum Emission Mask Measurements Setting the BTS (Example) Setting the BTS (Example) From the base transmission station simulator and the system controller, set up a call using loopback mode for the BTS to transmit the RF power as follows: Frequency: 2.0 GHz Output Power: −20 dBm Carrier Number: 1...
- Page 40 Spectrum Emission Mask Measurements Measurement Procedure Measurement Procedure Step 1. Press to enable the TD-SCDMA with Mode TD-SCDMA with HSPA/8PSK HSPA/8PSK mode measurements. Step 2. Press to preset the analyzer. Mode Preset −dB Step 3. Press and enter the number and Input/Output External Gain according to the external attenuator connected to the analyzer.
- Page 41 Spectrum Emission Mask Measurements Measurement Results Measurement Results The Spectrum Emission Mask measurement result should look similar Figure 5-2. The text window shows the reference total power and the absolute peak power levels and margins from limit lines which correspond to the frequency bands on both sides of the reference channel.
- Page 42 Spectrum Emission Mask Measurements Measurement Results Figure 5-4 shows the reference PSD and the integrated power levels and margins from limit lines which correspond to the frequency bands on both sides of the reference channel Figure 5-4 SEM - PSD Ref, Integrated Power view Chapter 5...
- Page 43 Spectrum Emission Mask Measurements Troubleshooting Hints Troubleshooting Hints This spectrum emission mask measurement can reveal degraded or defective parts in the transmitter section of the unit under test. The following examples are those areas to be checked further. • Faulty DC power supply control of the transmitter power amplifier. •...
- Page 44 Spectrum Emission Mask Measurements Troubleshooting Hints Chapter 5...
- Page 45 Spurious Emissions Measurement This section explains how to make the spurious emission measurement on a TD-SCDMA base transceiver station (BTS), a TD-SCDMA repeater or a power amplifier (PA). This measurement identifies and determines the power level of spurious emissions in certain frequency bands. A Pass or Fail indication is shown in the Measurement Bar.
- Page 46 Spurious Emissions Measurement Configuring the Measurement System Configuring the Measurement System The BTS under test must be set to transmit the RF power remotely through the system controller. This transmitting signal is connected to the RF input port of the instrument. Connect the equipment as shown. Figure 6-1 Spurious Emission Measurement System 1.
- Page 47 Spurious Emissions Measurement Setting the BTS (Example) Setting the BTS (Example) From the base transmission station simulator and the system controller, set up a call using loopback mode for the BTS to transmit the RF power as follows: Frequency: 2.0 GHz Output Power: −20 dBm Carrier Number: 1 Switching Point: 3...
- Page 48 Spurious Emissions Measurement Measurement Procedure Measurement Procedure Step 1. Press to enable the TD-SCDMA with Mode TD-SCDMA with HSPA/8PSK HSPA/8PSK mode measurements. Step 2. Press to preset the analyzer. Mode Preset −dB Step 3. Press and enter the number and Input/Output External Gain according to the external attenuator connected to the analyzer.
- Page 49 Spurious Emissions Measurement Measurement Results Measurement Results The Spurious Emissions measurement results should look similar to Figure 6-2. The spectrum window and the text window show the spurs that are within the current value of the Marker Peak Excursion setting of the absolute limit.
- Page 50 Spurious Emissions Measurement Troubleshooting Hints Troubleshooting Hints If there is a frequency channel dependency in the operating characteristics of a multi-carrier power amplifier, it might have channel balance problems due to spurious response, distortion, and/or inter-modulation products. Chapter 6...
- Page 51 Occupied Bandwidth Measurements This chapter explains how to make the occupied bandwidth measurement on a TD-SCDMA base transceiver station (BTS), a TD-SCDMA repeater or a power amplifier (PA). The instrument measures power across the band, and then calculates its 99.0% power bandwidth.
- Page 52 Occupied Bandwidth Measurements Configuring the Measurement System Configuring the Measurement System The BTS under test must be set to transmit the RF power remotely through the system controller. This transmitting signal is connected to the RF input port of the instrument. Connect the equipment as shown. Figure 7-1 Occupied Bandwidth Measurement System 1.
- Page 53 Occupied Bandwidth Measurements Setting the BTS (Example) Setting the BTS (Example) From the base transmission station simulator and the system controller, set up a call using loopback mode for the BTS to transmit the RF power as follows: Frequency: 2.0 GHz Output Power: −20 dBm Carrier Number: 1 Switching Point: 3...
- Page 54 Occupied Bandwidth Measurements Measurement Procedure Measurement Procedure Step 1. Press to enable the TD-SCDMA with Mode TD-SCDMA with HSPA/8PSK HSPA/8PSK mode measurements. Step 2. Press to preset the analyzer. Mode Preset −dB Step 3. Press and enter the number and Input/Output External Gain according to the external attenuator connected to the analyzer.
- Page 55 Occupied Bandwidth Measurements Measurement Results Measurement Results The Occupied BW measurement result should look similar to the Figure 7-2. A pair of white vertical lines represent the standard carrier bandwidth 1.6 MHz. Figure 7-2 Occupied Bandwidth Measurement Information shown in the text window of the displays include: •...
- Page 56 Occupied Bandwidth Measurements Troubleshooting Hints Troubleshooting Hints Any distortion such as harmonics or intermodulation, for example, produces undesirable power outside the specified bandwidth. Shoulders on either side of the spectrum shape indicate spectral regrowth and intermodulation. Rounding or sloping of the top shape can indicate filter shape problems.
- Page 57 Power Statistics CCDF Measurements This section explains how to make the Power Statistics Complementary Cumulative Distribution Function (Power Stat CCDF) measurement on a TD-SCDMA base transceiver station (BTS), a TD-SCDMA repeater or a power amplifier (PA). Power Stat CCDF curves characterize the higher level power statistics of a digitally modulated signal.
- Page 58 Power Statistics CCDF Measurements Configuring the Measurement System Configuring the Measurement System The BTS under test must be set to transmit the RF power remotely through the system controller. This transmitting signal is connected to the RF input port of the instrument. Connect the equipment as shown. Figure 8-1 Power Statistics (CCDF) Measurement System 1.
- Page 59 Power Statistics CCDF Measurements Configuring the Measurement System — Figure 8-2 Code Domain Power Measurement System Baseband Chapter 8...
- Page 60 Power Statistics CCDF Measurements Setting the BTS (Example) Setting the BTS (Example) From the base transmission station simulator and the system controller, set up a call using loopback mode for the BTS to transmit the RF power as follows: Frequency: 2.0 GHz Output Power: −20 dBm Carrier Number: 1...
- Page 61 Power Statistics CCDF Measurements Measurement Procedure Measurement Procedure Step 1. Press to enable the TD-SCDMA with Mode TD-SCDMA with HSPA/8PSK HSPA/8PSK mode measurements. Step 2. Press to preset the analyzer. Mode Preset Step 3. Select the signal inputs for the measurement. For BBIQ measurements this will be the I or I input and the Q or Q input.
- Page 62 Power Statistics CCDF Measurements Measurement Results Measurement Results The CCDF measurement result looks similar to Figure 8-3. Figure 8-3 Power Statistics CCDF Measurement Chapter 8...
- Page 63 Power Statistics CCDF Measurements Troubleshooting Hints Troubleshooting Hints The power statistics CCDF measurement can contribute in setting the signal power specifications for design criteria for systems, amplifiers, and other components. For example, it can help determine the optimum operating point to adjust each code timing for appropriate peak or average power ratio, or both, throughout the wide channel bandwidth of the transmitter for a TD-CDMA system.
- Page 64 Power Statistics CCDF Measurements Troubleshooting Hints Chapter 8...
- Page 65 Modulation Accuracy (Composite EVM) Measurements This section explains how to make the modulation accuracy (composite EVM) measurement on a TD-SCDMA base transceiver station (BTS), a TD-SCDMA repeater or a power amplifier (PA). Modulation accuracy is the ratio of the correlated power in a multi-coded channel to the total signal power.
- Page 66 Modulation Accuracy (Composite EVM) Measurements Configuring the Measurement System Configuring the Measurement System The BTS under test must be set to transmit the RF power remotely through the system controller. This transmitting signal is connected to the RF input port of the instrument. Connect the equipment as shown. Figure 9-1 Modulation Accuracy Measurement System 1.
- Page 67 Modulation Accuracy (Composite EVM) Measurements Configuring the Measurement System Units with option BBA can also make Baseband I+jQ measurements. Connect the equipment as shown. — Figure 9-2 Code Domain Power Measurement System Baseband Chapter 9...
- Page 68 Modulation Accuracy (Composite EVM) Measurements Setting the BTS (Example) Setting the BTS (Example) From the base transmission station simulator and the system controller, set up a call using loopback mode for the BTS to transmit the RF power as follows: Frequency: 2.0 GHz Output Power: −20 dBm...
- Page 69 Modulation Accuracy (Composite EVM) Measurements Measurement Procedure Measurement Procedure Step 1. Press to enable the TD-SCDMA with Mode TD-SCDMA with HSPA/8PSK HSPA/8PSK mode measurements. Step 2. Press to preset the analyzer. Mode Preset Step 3. Select the signal inputs for the measurement. For BBIQ measurements this will be the I or I input and the Q or Q input.
- Page 70 Modulation Accuracy (Composite EVM) Measurements Measurement Results Measurement Results The Mod Accuracy I/Q Polar Vector Constellation measurement result should look similar to Figure 9-3. The modulation constellation is shown, along with summary data for Rho, EVM, Peak Code Domain Error, and phase and magnitude errors. Figure 9-3 Modulation Accuracy - I/Q Measured Polar Graph View (Default)
- Page 71 Modulation Accuracy (Composite EVM) Measurements Measurement Results Figure 9-5 shows a combination view of the magnitude error, phase error, and EVM graph windows. Figure 9-5 Modulation Accuracy Measurement - I/Q Error View Figure 9-6 shows a combination view of the captured data trace and metrics windows.
- Page 72 Modulation Accuracy (Composite EVM) Measurements Troubleshooting Hints Troubleshooting Hints Poor phase error often indicates a problem with the I/Q baseband generator, filters, or modulator, or all three, in the transmitter circuitry of the unit under test (UUT). The output amplifier in the transmitter can also create distortion that causes unacceptably high phase error.
- Page 73 Code Domain Measurements This chapter explains how to make a code domain measurement on a TD-SCDMA base transceiver station (BTS), a TD-SCDMA repeater or a power amplifier (PA). Code Domain measurements provide the power data and error data for an individual code channel and layer for a specified timeslot and sub-frame.
- Page 74 Code Domain Measurements Configuring the Measurement System Configuring the Measurement System For RF measurements, the BTS under test must be set to transmit the RF power remotely through the system controller. This transmitting signal is connected to the RF input port of the instrument. Connect the equipment as shown.
- Page 75 Code Domain Measurements Configuring the Measurement System Units with option BBA can also make Baseband I+jQ measurements. Connect the equipment as shown. — Figure 10-2 Code Domain Power Measurement System Baseband Chapter 10...
- Page 76 Code Domain Measurements Setting the BTS (Example) Setting the BTS (Example) From the base transmission station simulator and the system controller, set up a call using loopback mode for the BTS to transmit the RF power as follows: Frequency: 2.0 GHz Output Power: −20 dBm Carrier Number: 1 Switching Point: 3...
- Page 77 Code Domain Measurements Measurement Procedure Measurement Procedure Step 1. Press to enable the TD-SCDMA mode Mode TD-SCDMA with HSPA/8PSK measurements. Step 2. Press to preset the analyzer. Mode Preset Step 3. Select the signal inputs for the measurement. For BBIQ measurements this will be the I or I input and the Q or Q input.
- Page 78 Code Domain Measurements Measurement Procedure Step 9. Press to initiate the code domain measurement. Meas Code Domain Step 10. Press to set the center frequency to 2 GHz. FREQ Channel Step 11. Press to select from the following views: View/Display •...
- Page 79 Code Domain Measurements Results Results The measurement result should look similar to Figure 10-3. The graph window is displayed with a text window below it. The text window shows the total power level along with the relative power levels of the various channels.
- Page 80 Code Domain Measurements Results Figure 10-5 shows a combination view of the code domain power, symbol power, and I/Q symbol polar vector graph windows, with a summary results window. The summary data at the lower right indicates peak and RMS EVM, magnitude and phase errors, powers of the signal and the channel.
- Page 81 Code Domain Measurements Results Figure 10-7 shows a combination view of the code domain power, symbol power graph windows, and the I/Q demodulated bit stream data for the symbol power slots selected by the measurement interval and measurement offset parameters. The Demod Bits View displays the same Code Domain Power and Symbol Power windows as the Code Domain (Quad View) shown in Figure...
- Page 82 Code Domain Measurements Troubleshooting Hints Troubleshooting Hints Uncorrelated interference may cause CW interference like local oscillator feed through or spurs. Another cause of uncorrelated noise can be I/Q modulation impairments. Correlated impairments can be due to the phase noise on the local oscillator in the upconverter or I/Q modulator of the unit under test (UUT).
- Page 83 IQ Waveform (Time Domain) Measurements This chapter explains how to make a waveform (time domain) measurement. The measurement of I and Q modulated waveforms in the time domain enables you to see the voltages which comprise the complex modulated waveform of a digital signal.
- Page 84 IQ Waveform (Time Domain) Measurements Configuring the Measurement System Configuring the Measurement System The base station (BTS) under test have to be set to transmit the RF power remotely through the system controller. This transmitting signal is connected to the analyzer RF input port. Connect the equipment as shown.
- Page 85 IQ Waveform (Time Domain) Measurements Configuring the Measurement System Units with option BBA can also make Baseband I+jQ measurements. Connect the equipment as shown. — Figure 11-2 Code Domain Power Measurement System Baseband Chapter 11...
- Page 86 IQ Waveform (Time Domain) Measurements Setting the BTS (Example) Setting the BTS (Example) From the base transmission station simulator and the system controller, set up a call using loopback mode for the BTS to transmit the RF power as follows: Frequency: 2.0 GHz Output Power: −20 dBm...
- Page 87 IQ Waveform (Time Domain) Measurements Measurement Procedure Measurement Procedure Step 1. Press to enable the TD-SCDMA with Mode TD-SCDMA with HSPA/8PSK HSPA/8PSK mode measurements. Step 2. Press to preset the analyzer. Mode Preset Step 3. Select the signal inputs for the measurement. For BBIQ measurements this will be the I or I input and the Q or Q input.
- Page 88 IQ Waveform (Time Domain) Measurements Measurement Results Measurement Results Figure 11-3 shows the IQ Waveform measurement result in RF Envelope view and Figure 11-4 shows IQ Waveform view. Figure 11-3 Monitor Spectrum Measurement - RF Envelope view (Default) Figure 11-4 Monitor Spectrum Measurement - I/Q Waveform view Chapter 11...
- Page 89 Monitor Spectrum Measurements This section explains how to make a Monitor Spectrum measurement on a TD-SCDMA base transceiver station (BTS), a TD-SCDMA repeater or a power amplifier (PA). This measurement shows a spectrum domain of the signal, providing you a quick and convenient means of looking at the entire spectrum, which is similar to the Spectrum Analyzer mode.
- Page 90 Monitor Spectrum Measurements Configuring the Measurement System Configuring the Measurement System The base station (BTS) under test have to be set to transmit the RF power remotely through the system controller. This transmitting signal is connected to the analyzer RF input port. Connect the equipment as shown. Figure 12-1 Transmit Power Measurement System 1.
- Page 91 Monitor Spectrum Measurements Setting the BTS (Example) Setting the BTS (Example) From the base transmission station simulator and the system controller, set up a call using loopback mode for the BTS to transmit the RF power as follows: Frequency: 2.0 GHz −20 dBm Output Power: Carrier Number: 1...
- Page 92 Monitor Spectrum Measurements Measurement Procedure Measurement Procedure Step 1. Press Mode TD-SCDMA with HSPA/8PSK to enable the TD-SCDMA mode measurements. Step 2. Press to preset the analyzer. Mode Preset −dB Step 3. Press Input/Output External Gain and enter the number and according to the external attenuator connected to the analyzer.
- Page 93 Monitor Spectrum Measurements Measurement Results Measurement Results Figure 12-2 shows the Monitor Spectrum measurement result. Figure 12-2 Monitor Spectrum Measurement Chapter 12...
- Page 94 Monitor Spectrum Measurements Measurement Results Chapter 12...
- Page 95 Using Option BBA Baseband I/Q Inputs...
- Page 96 Using Option BBA Baseband I/Q Inputs Baseband I/Q Measurements Available for X-Series Signal Analyzers Baseband I/Q Measurements Available for X-Series Signal Analyzers The following table shows the measurements that can be made using Baseband I/Q inputs: Table 13-1 BBIQ Supported Measurements vs. Mode Mode Measurements IQ Waveform...
- Page 97 Using Option BBA Baseband I/Q Inputs Baseband I/Q Measurement Overview Baseband I/Q Measurement Overview The Baseband I/Q functionality is a hardware option, Option BBA. If the option is not installed in the instrument, the I/Q functionality cannot be enabled. The Baseband I/Q option provides four input ports and one Calibration Output port.
- Page 98 Using Option BBA Baseband I/Q Inputs Baseband I/Q Measurement Overview C. Input a value in seconds. Skew D. Set up the I Probe by pressing I Probe a. Select probe Attenuation b. Calibrate the probe. Press to start the calibration Calibrate...
- Page 99 Baseband I/Q Inputs (Option BBA) Measurement Concepts The N9020A Option BBA Baseband I/Q Inputs provides the ability to analyze baseband I/Q signal characteristics of mobile and base station transmitters. This option may be used only in conjunction with the following modes: •...
- Page 100 Baseband I/Q Inputs (Option BBA) Measurement Concepts What are Baseband I/Q Inputs? What are Baseband I/Q Inputs? Option BBA consists of a Baseband Input module, four input connectors, and a calibration output connector. The connectors are at the left side of the front panel. The two ports labeled “I” and “Q” are the “unbalanced”...
- Page 101 Baseband I/Q Inputs (Option BBA) Measurement Concepts What are Baseband I/Q Signals? What are Baseband I/Q Signals? In transmitters, the term baseband I/Q refers to signals that are the fundamental products of individual I/Q modulators, before the I and Q component signals are combined, and before upconversion to IF or RF frequencies.
- Page 102 Baseband I/Q Inputs (Option BBA) Measurement Concepts Why Make Measurements at Baseband? Why Make Measurements at Baseband? Baseband I/Q measurements are a valuable means of making qualitative analyses of the following operating characteristics: • I/Q signal layer access for performing format-specific demodulation measurements (for example, CDMA, GSM, W-CDMA).
- Page 103 Baseband I/Q Inputs (Option BBA) Measurement Concepts Why Make Measurements at Baseband? Chapter 14...
- Page 104 Baseband I/Q Inputs (Option BBA) Measurement Concepts Selecting Input Probes for Baseband Measurements Selecting Input Probes for Baseband Measurements The selection of baseband measurement probe(s) and measurement method is primarily dependent on the location of the measurement point in the circuit. The probe must sample voltages without imposing an inappropriate load on the circuit.
- Page 105 Baseband I/Q Inputs (Option BBA) Measurement Concepts Selecting Input Probes for Baseband Measurements Supported Probes The following table lists the probes currently supported by Option BBA: Table 14-1 Probe Type Model Number Description Active 1130A 1.5 GHz differential probe amp (No probe head) InfiniMax 3.5 GHz probe 1131A...
- Page 106 Baseband I/Q Inputs (Option BBA) Measurement Concepts Baseband I/Q Measurement Views Baseband I/Q Measurement Views Measurement result views made in the IQ Analyzer (Basic) mode are available for baseband signals if they relate to the nature of the signal itself. Many measurements which relate to the characteristics that baseband I and Q signals have when mixed and upconverted to signals in the RF spectrum can be made as well.
- Page 107 Baseband I/Q Inputs (Option BBA) Measurement Concepts Baseband I/Q Measurement Views measure an I only or Q only waveform directly. Chapter 14...