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. GENERAL DESCRIPTION
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- 1
1.1 How to Use this Operation Manual
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1.2 Outline of Products
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1.3 Before Starting the Use
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1.3.1 Appearance Check and Accessory Check
... 1 - 4
1.3.2 Environmental Conditions for Use
... 1 - 5
1.3.3 Before turning This
Analyzer
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(1) Power Supply Condition
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(2) Check for Fuse
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(3) Check for
Power supply Cable
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(4) Maximum Input
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~ 8
2. USING R4131 FOR THE FIRST TIME
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2.1 Screen of Spectrum
Analyzer
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2.2 Basic Operating Procedure
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(1) Initialization Screen
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(2) Input of Measurement Signal
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(3) Setting of Center Frequency
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(4) Setting of Frequency Span
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(5) Setting of Reference Level
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(6) How to Use the MARKER Key
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(7) How to Improve Frequency Accuracy According to
the Correction Routine
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(8) Warm-up Time
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3. DESCRIPTION OF PANEL SURFACE AND CRT DISPLAY
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3.1 Description of Front Panel
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3.2 Description of Each Key (in the NORMAL mode)
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3.3 Description of Each Key (in the SHIFT mode)
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3.4 Description of Rear Panel
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3.5 How to Read CRT Display Indication
... 3 - 10
4. OPERATING METHOD
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4.1 Initialization
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4.2 Center Frequency
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4.3 Function to Improve Center Frequency Accuracy
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(1) AFC Function (only in
R4131D.DN)
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(2) ZERO CALibration
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(3) CF CALibration
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(4) CF ADJustment
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4.4 Frequency Span
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(1) What Is Zero Span (Displayed in the Time Axis)?
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4.5 Interlocking Function (AUTO)
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4.6 Resolution Bank Width (RBW)
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4.7 Reference Level and Ordinate Axis Scale
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(1) Reference Level
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(2) Quadrature Axis Scale (dB/DIV)
... 4 - 12
(3) Reference Level Step Width (COARSE/FINE)
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(4) Unit (UNITS)
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(5) Calibration of Ordinates Axis Level
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4.8 RF Input Attenuator
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4.9 Display Line
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4.10 Marker Function
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(1) Display of Marker
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(2) Erasing of Marker
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(3) PEAK Search
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(4) MarKer Center Frequency
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(5) SIGnal TRacK
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(6) MARKER PAUSE
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(7) Measurement of NOISE/Hz
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4.11 Video
Filter Band Width (VIDEO FiLTeR)
... 4 - 22
4.12 Setting of Sweep Time
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4.13 Selection of Sweep Mode/Trigger Mode
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4.14 Display Detection Mode
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(1) SAMPLE DETection
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(2) POSi PeaK DETection
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(3) NORMAL DETection (POSI/NEGA DET)
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4.15 Selection of Trace Mode
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(1) WRITE
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(2) STORE
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(3) VIEW
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(4) WRITE and VIEW (2-screen display)
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(5) MAX HOLD
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4.16 Setting Conditions and SAVE/RECALL of Displayed
Waveform ... 4-33
(1 ) SAVE
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(2) RECALL
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4.17 Automatic Setting at Power ON
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4.18 Electric Field Intensity Measurement (dBu/m)
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4.19 QP Value Measurement (Quasi-peak Value Measurement)
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4.20 Normalize
... 4
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4.21 Occupied Frequency Band Width (OBW)
Measurement (only for(
R4131D)
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4.22 3dB DOWN,3dB DOWN LOOP,NEXT PEAK Function
(only for(
R4131D)
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4.23 Plotter Output
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5. APPLIED MEASURING METHOD
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5.1 Measurement of Modulation Frequency and Index of AM
Signal ... 5-2
5.1.1 Measurement of AM Wave When the Modulation Frequency
Is Low
and Modulation Index Is Large
... 5 -
3
5.1.2 Measurement of AM Wave When Modulation Frequency is
High and Modulation Index is Small
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5.2 Measurement of FM Wave
... 5
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5.2.1 Measurement of FM Wave When Modulation Frequency Is
Low ... 5-10
5.2.2 Measurement of FM Wave for High Modulation Frequency
... 5-13
5.2.3 Measurement of Peak Deviation ( f peak) of FM Wave
... 5 - 15
5.2.4 How to Obtain Modulation Index m when FM Modulation
Index m
Is Small
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6. GPIB CONNECTION AND ITS PROGRAMMING
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1
6.1 Outline of GPIB
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6.2 Standards
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6.2.1 GPIB Specifications
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6.2.2 Interface Function
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6.3 GPIB Handling Method
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6.3.1 For Connection to Component Devices
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6.3.2 Setting of ADDRESS
SW ... 6
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6.3.3 Programming
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6.4 Setting of Each Function
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6.4.1 Setting of Center Frequency
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(1) When the Center Frequency Is Set Using the Command
for Setting the TUNING Knob
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(2) When the Value of Center Frequency is Set
Directly ... 6-10
6.4.2 Setting of Frequency Span
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(1) When Using the Command Corresponding to the Key
on Front Panel
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(2) When the Value of Frequency Span Is Set
Directly ... 6 - 12
6.4.3 Setting of Reference Level
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(1) When Using the Command Corresponding to the Key
on Front Panel
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(2) When the Value of the Reference Level Is Set Directly
... 6 - 14
6.4.4 Setting of Marker
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(1) When Using the Command Corresponding to the Data Knob
... 6 - 14
(2) When the Value of Marker Frequency Is Set Directly
... 6 - 15
6.4.5 Setting of Resolution Band Width
... 6 - 16
(1) When Using the Command Corresponding to the
Key ... 6 - 16
(2) When the Resolution Band Width Is Set
Directly ... 6 - 17
6.4.6 Setting of VIDEO
Filter Band Width
... 6 - 18
(1) When Using the Command Corresponding to the
Key ... 6 - 18
(2) When the Value of VIDEO
Filter Band Width Is Set
Directly .. 6-19
6.4.7 Setting of Sweep Time (SWEEP TIME/DIV)
... 6 - 19
(1) When Using the Command Corresponding to the
Key ... 6 - 20
(2) When the Sweep Time Is Set Directly
... 6-21
6.5 Output of Setting Conditions
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6.5.1 "OP" Command
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6.5.2 Format of Output Data
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( 1 ) Header
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(2) Block Delimiter
... 6-26
6.5.3 Mode String
... 6-27
6.6 Input/Output of Trace Data
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6.6.1 Output of Trace Data
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(1) Method to Output the Trace Data with ASCII
Code ... 6 - 31
(2) Method to Output Data with the Binary
Code ... 6 - 32
6.6.2 Input of Trace Data
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(1) Method to Input the Trace Data with the ASCII
Code ... 6-34
(2) Method to Input the Trace Data with the Binary Code
... 6-35
6.7 Service Request
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(1) Status Byte
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(2) Output of Status Byte
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6.8 Notes in Programming
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(1) Noteworthy Points in Sending a Command
... 6 - 39
(2) Noteworthy Points in Spectrum Analysis when the Frequency
Span Is Made Narrower
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(3) Noteworthy Points for the Setting of Center Frequency
When the Frequency Span Is Less Than 10 MHz
... 6 - 40
6.9 List of GPIB Codes
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7. INSPECTION AND MAINTENANCE
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7.1 Defects and Abnormal stresses
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7.2 Notes in Storing and Shipping this Equipment
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8. TECHNICAL DATA OF FUNCTION AND
Accessories
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8.1 Technical Data of Function
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(1) Frequency Specification
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(2) Amplitude Specification
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(3) Sweep Specification
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(4) Input Specification
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(5) Display Unit Specification
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(6) Output Specification
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(7) General Specifications
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8.2 Accessories
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9. FUNCTIONAL DESCRIPTION
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9.1 Outline
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9.1.1 Basic Operations
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9.1.2 R4131 Series Configuration
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9.2 RF Block
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9.2.1 First Mixer
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(1) 3.6 GHz Low-pass
Filter
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(2) 4.0 GHz Band Pass
Filter
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(3) First Mixer
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9.2.2 Second Mixer
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(1) 4.0 GHz Band Pass
Filter
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(2) Second Local
Oscillator
... 9-9
(3) Second Mixer
... 9-9
9.2.3 Third and Fourth Mixers
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(1 ) 226.42 MHz Preamplifier
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(2) Third Mixer
... 9-9
(3) 200 MHz Crystal
Oscillator
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(4) Gain Control
Amplifier
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(5) 30 MHz Crystal
Oscillator
... 9
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9.3 YT0_C0NT/IF Board
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9.3.1 IF
Filter
... 9-12
(1) Input 3.58 MHz Band Pass
Filter
... 9 - 13
(2) Gain Adjust
Amplifier
... 9
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(3) Crystal
Filter
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(4) LC
Filter
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(5) Step
Amplifier
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9.3.2 YTO Controller and AFC
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( 1 ) YTO Controller
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(2) AFC
... 9-29
9.4 Analog Board
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9.4.1 Log
Amplifier
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9.4.2 Ramp
Generator
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(1 )
Current source
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(2) Ramp
Generator
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9.4.3 A/D
Converter
... 9-28
(1) X-axis A/D
Converter
... 9 - 39
(2) Y-axis A/D
Converter
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9.4.4 Analyzer Test
... 9-30
10. CALIBRATION AND ADJUSTMENTS
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10.1 Preparation
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10.2 A/D Adjustment (Analog Board) (BLR-015117)
... 10 - 4
10.3 LOG
Amplifier Adjustment (Analog Board) (BLR-015117)
... 10 - 6
10.4 IF
Filter Adjustment (YTO_CONT/IF Board
... 10 - 8
10.4.1 3.58 MHz BPF Adjustment
... 10-8
10.4.2 Crystal
Filter Adjustment
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10.4.3 LC
Filter Adjustment
... 10
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10.4.4 Resolution Bandwidth Level Adjustment
... 10 - 12
10.4.5 Step
Amplifier Adjustment
... 10
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10.5 YTO_CONT Adjustment (YTO_CONT/IF Board) (BLR-015116)
... 10 - 15
10.6 RF Block Adjustment
... 10
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10.6.1 Third Local
Oscillator Adjustment
... 10 - 19
10.6.2 Second Local
Oscillator Adjustment
... 10 - 19
10.6.3 Fourth Local
Oscillator Adjustment
... 10 - 19
10.7 Location Diagram of YTO CONT/IF Board
... 10 - 20
10.8 Location Diagram of Analog Board
... 10
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1 1 . PERFORMANCE TESTING
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11.1 preparation
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11.2 General Precautions
... 11
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11.3 Frequency Span Accuracy
... 11
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11.4 Center Frequency Readout Accuracy
... 11 - 10
11.5 Residual
FM ... 11
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11.6 Noise Sidebands
... 11
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11.7 Resolution Bandwidth Accuracy
... 11
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11.8 Resolution Bandwidth Selectivity
... 11 -
22
11.9 Resolution Bandwidth Switching Accuracy
... 11 - 24
11.10 LOG Linearity and LIN
Linearity ... 11 - 26
11.11 Reference Level Accuracy
... 11
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11.12 Residual Responses
... 11
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11.13 Gain Compression
... 11
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11.14 Frequency Response
... 11
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11.15 Average Noise Level
... 11
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11.16 Sweep Time
Accuracy ... 11
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11.17 Calibrated Output Accuracy
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12. MAINTENANCE DATA
... 12
- 1
12.1 preparation
... 12
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12.2 Location Diagram (Top & Bottom)
... 12 - 4
12.3 Location Diagram for RF
... 12
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12.4 Block Diagram
... 12
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12.5 Self Test
... 12
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APPENDIX
A. 1 Explanation of Terminologies
... A
- 2
A. 2 Level Conversion Table
... A
- 9
A.3 Parts Location and Circuit Diagrams
... A - 10
List of Figures
... F
- 1
List of Tables
... T
- 1
List of
Examples ... E
- 1
External View
Comments