Anritsu MG3641A, MG3642A SECTION 5 MEASUREMENT

SECTION 5 MEASUREMENT

SECTION 5MEASUREMENT

5.1 Measurement of Sensitivity

The sensitivity of the receiver means the minimum signal input level required to output the rated signal of the receiver.

The following incidental conditions are required for the signal level, noise level, and signal distortion obtained in the

output side of the receiver:

• AM receiver ............. Indicated by the minimum value of the typically modulated carrier voltage required to output

the rated signal of the specified signal-noise rate (S/N). For example, when S/N = 20 dB, the

minimum value of the carrier input voltage for 60 % modulation required to output the 50-

mW signal is indicated by 10

µ

V.

• FM receiver.............. Indicated by the minimum value of the typically modulated carrier voltage required to obtain

the rated output and specified value (–12 dB in 400 MHz) of the signal to noise and distortion

(SINAD) obtained by adding the signal distortion to the signal-noise rate (S/N). In addition,

this sensitivity is indicated by the minimum value of the carrier voltage required to suppress

the receiver noise output by 20 dB at no-modulation. This is called a noise suppression (NQ)

sensitivity.

This section describes the latter 20 dB NQ sensitivity and explains how to measure the 12 dB SINAD sensitivity.

Contents

Main ii Safety Symbols Symbols used in manual Safety Symbols Used on Equipment and in Manual DANGER WARNING CAUTION iii iv v vi vii Equipment Certificate Anritsu Warranty Anritsu Corporation Contact viii Notes On Export Management Page x CE Conformity Marking CE marking 1. Product Model 2. Applied Directive 3. Applied Standards Page C-tick Conformity Marking xiii Power Line Fuse Protection Page I SECTION 4 OPERATING INSTRUCTIONS ............................................................. 4-1 II III Page 1-1 SECTION 1 GENERAL 1.1 Brief Description 1-2 1.2 Operation Manual Table 1-1 1-3 1.3 Composition of Devices 1.3.1 Standard Composition Table 1-2. Standard Composition of Devices 1-4 1.3.2 Options Table 1-3. Options 1-5 1.4 Application Parts Table 1-4. Application Parts 1-6 1.5 Specifications 1-7 1-8 1-9 1-10 1-11 Page 2-1 SECTION 2 PRECAUTION Fig. 2-1. Clearance for Fan CAUTION: 2.1 Installation Precautions 2.1.1 Installation site environmental conditions 2-2 2.2 Safety Measures 2.2.1 General power supply safety measures 2.2.2 Reverse power input to RF output connector Page 2-4 2.4 Preparation Before Power-On WARNING CAUTION 2-5 2.4.1 Connecting the Power Cord WARNING CAUTION 2-6 2.4.2 Fuse Replacement . 3-1 SECTION 3 PANEL LAYOUT 3.1 Panel Layout 3.1.1 Front panel layout 3-2 3-3 3.1.2 Rear panel layout Page SECTION 4 OPERATING INSTRUCTIONS 4.1 Turning Power On/Off DANGER WARNING Table 4-1. Indications of Power Indicator Lamps and Power Statuses 4.1.1 Turning Power On Note : Page 4.2 Explanation of Screens 4.3 Initial Settings Page 4.4 Setting the Frequency 4.4.1 Setting the Frequency 4.4.2 Displaying the Frequency Relative Value 4.4.3 Frequency Offset 4.5 Setting the Output Level 4.5.1 Setting the Output Level front panel [Shift] key [Level] key 4.5.2 Displaying the Output Level Relative Value 4.5.3 Output Level Offset 4.5.4 Level Continuous Mode Page 4.5.6 Special Functions Related to Level Page 4.6 Setting the Modulation 4.6.1 Outline of Modulation 4.6.2 Setting the Modulation Function 4.6.3 Setting the Modulation Factor and Frequency Deviation 4.6.4 Setting Range of FM Frequency Deviation 4.6.5 Polarity of Modulation Signal 4.6.6 Pulse Modulation Page 4.7 Setting the Modulation Signal Source 4.7.1 Internal Modulation Signal (Int1) 4.7.2 Internal Modulation Signals (Int2, Int3) 4.7.3 External Modulation Signals (Ext1, Ext2) MG3641A/MG3642A front panel Page Page Page 4.9 Memory Functions 4.9.1 Outline of Memory Functions 4.9.2 Storing in the Memory 4.9.3 Recalling Memory Contents Page 4.9.4 Clearing the Memory 4.9.5 Selecting the Memory Recall Mode 4.10 Sweep Functions 4.10.1 Outline of Sweep Functions 4.10.2 Setting and Executing the Sweep Page Page 4.10.3 Sweep Auxiliary Outputs Page 4-41 4.11 Trigger Function 4.11.1 Outline of trigger function 4.11.2 Registering the trigger program 4-43 4.11.3 Executing the trigger program 4.11.4 Checking the contents of the trigger program Page 4.12.2 Setting Bell Alarm On/Off 4-47 4.12.3 Setting address and only mode of GPIB 4.12.4 Panel Lock 4-49 4.13 Removing Reverse Power Protection (RPP) Circuit Operation 4.14 Error Messages 4-51 Page SECTION 5 MEASUREMENT 5.1 Measurement of Sensitivity 5.1.1 Measuring 20 dB NQ sensitivity Fig. 5-1. Measuring 20 dB NQ Sensitivity 5.1.2 Measuring 12 dB SINAD sensitivity Fig. 5-2. Measuring 12 dB SINAD Sensitivity 5.2 Measuring the 1-signal Selectivity 5.2.1 Measuring selectivity characteristics of the FM receiver in 20 dB NQ method Fig. 5-3. Measuring Selectivity in 20 dB NQ Method Page 5.2.2 Measuring spurious response Fig. 5-4. Measuring Spurious Sensitivity Page 5.3 Measuring the 2-signal Selectivity 5.3.1 Measuring the sensitivity blocking of the FM receiver Fig. 5-5. Measuring the 2-signal Selectivity Page 5.3.2 Measuring the cross-modulation characteristics NOTE Page Page 6-1 SECTION 6 GPIB 6.1 Outline of GPIB 6.1.1 Overview 6.1.2 GPIB functions 6-2 6.1.3 Setup example 6-3 6.1.4 Standard 6-4 6.2 Device Message List Fig. 6-1. SCPI Command Tree Example 6.2.1 Outline 6.2.2 General Information On SCPI 6-5 6.2.4 Writing Commands Fig. 6-2. Writing Commands 6-6 6.2.5 Compounding Commands 6-7 6.2.6 Parameter Table 6-1. Contents of Parameter Types 6.2.7 Unit Table 6-2. Contents of Unit Types 6-8 6.2.8 Command Tree 6-9 6-10 6-11 6-12 6-13 6-14 6.3 Connecting the GPIB Cable 6-15 6.4 Device Message Format 6.4.1 Program message format ; 6-16 6-17 6-18 6.4.2 Response message format ; 6-19 Page 6-21 6.5.2 IEEE488.2-based status register Standard Status Model Diagram 6-22 6.5.3 SCPI standard status register 6-23 6.5.4 Reading, writing, clearing, and resetting the status register 6-24 6-25 6.5.5 SCPI error messages 6-26 6-27 6.6 Initializing Device 6.6.1 Bus initialization 6.6.2 Message initialization 6.6.3 Device initialization 6-28 6.7 Detailed Description of Commands 6.7.1 Frequency subsystem 6-29 6-30 6-31 6-32 6.7.2 Output level subsystem 6-33 6-34 6-35 6-36 6-37 6-38 6.7.3 AM subsystem 6-39 6.7.4 FM subsystem 6-40 6-41 6.7.5 PM subsystem 6-42 6.7.6 Modulation source subsystem 6-43 6-44 6-45 6.7.7 MEMORY subsystem 6-46 6-47 6.7.8 Display subsystem 6-48 6.7.9 System subsystem 6-49 6.7.10 Status subsystem 6-50 6-51 6.8 IEEE488.2 Common Command 6-52 Page 6-54 6-55 6-56 6.10 GPIB Command Interchange Function 6.10.1 Outline 6-57 6.10.2 Restrictions in MG3633A command interchange mode 6-58 6-59 6-60 6.10.3 Restrictions in MG3631A/32A command interchange mode Page Page Page 7-2 7.2 Performance Test Device List Table 7-1. Performance Test Device List 7-3 7.3 Performance Test 7-4 7.3.1 Output frequency Fig. 7-1. Output Frequency Test 7-5 7.3.2 Output level frequency characteristics Fig. 7-2. Output Level Frequency Characteristic Test 7-6 7.3.3 Output level accuracy 7-7 7-8 7.3.4 FM deviation and FM distortion Fig. 7-4. FM Deviation and FM Distortion 7-9 7-10 7.3.5 AM modulation factor and AM distortion Page Page 8-1 SECTION 8 CALIBRATION 8.1 Calibration Required 8.2 Calibration Device List Table 8-1. Calibration Device List 8-2 8.3 Calibration 8-3 Fig. 8-1. Calibration of Reference Oscillator Note Page 9-1 SECTION 9 STORAGE AND TRANSPORTATION 9.1 Daily Servicing and Preventive Maintenance Table 9-1. Regular Servicing 9.2 Storage Precautions 9.2.1 Precautions before storage 9-2 9.2.2 Recommended storage conditions Note 9.3 Repacking and Transportation 9.3.1 Repacking APPENDIX A INITIAL FACTORY SETTINGS A-2 A-3 Page Page Page B-3 B-4 B-5 Page Page Page Page Page Page Page Page Page Page Page Page E-2 E-3 E-4 E-5 E-6