Equipment information:

Advantest Corporation R4131CN Spectrum analyzer
Manufacturer:
Advantest Corporation
Model: R4131CN
Date: 1988
Category: Measurement instruments
Group: Spectrum analyzer
Description:
Information:
                                    The R4131 covers a band-width as wide as 10 kHz to 3500 kHz
and is
controlled by a microcomputer. This analyzer features easy
confirmation
of all measuring conditions, since its
frequency span is 4 GHz to 50 kHz,
resolution is 1 MHz to 1 kHz,
level data resolution by a marker is 0.05 dB,
tube surface dynamic range is 80 dB,
and the setting conditions of the its major functions are
shown on its CRT
display.
The panel of this equipment enables its three major
functions (center
frequency, frequency span, and reference level) to be
independent of each
other, and its layout makes for excellent operability. In
addition, the
resolution band, sweep time and input attenuator values are set
automatically by its AUTO feature.

These manuals are available for the above equipment:

Advantest Corporation -- R4131CN -- User Manual
File name: Advantest-5731-Manual-Page-1-Picture
Manual Type: User Manual
Pages: 444
Size: 5.80 Mbytes (6077244 Bytes)
Language: english
Revision: First Printing
Manual-ID/Number: FOE-8324154N01
Date: 1988
Quality: Scanned document, all readable.
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Advantest Corporation -- R4131CN -- Service and User Manual
File name: Advantest-7991-Manual-Page-1-Picture
Manual Type: Service and User Manual
Pages: 362
Size: 10.18 Mbytes (10671838 Bytes)
Language: english
Revision:
Manual-ID/Number: EM00 9 5 04
Date: 17 February 1988
Quality: Scanned document, all readable.
Upload date:
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Advantest Corporation -- R4131CN -- User Manual
File name: Advantest-9427-Manual-Page-1-Picture
Manual Type: User Manual
Pages: 433
Size: 7.08 Mbytes (7427954 Bytes)
Language: english
Revision:
Manual-ID/Number: FOE-8324154N01
Date: 17 February 1988
Quality: Scanned document, all readable.
Upload date:
MD5: 48233d308522cb133eed3bbc8bec221b
ed2kID: 87d4a7891149a66fdaa5c41bdcb20300
Downloads: 21 since 26 August 2017
Information:
. GENERAL DESCRIPTION
............................................................................................1
- 1

1.1	How to Use this Operation Manual
..............................................................1
- 2

1.2	Outline of Products
........................................................................................1
- 3

1.3	Before Starting the Use
................................................................................1
- 4

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
..............................................................1
- 5

(1)	Power Supply Condition
..........................................................................1
- 5

(2)	Check for Fuse
..........................................................................................1
- 6

(3)	Check for Power Supply Cable
..............................................................1
- 7

(4)	Maximum Input
............................................................................................1
~ 8

2.	USING R4131 FOR THE FIRST TIME
......................................................................2
- 1

2.1	Screen of Spectrum Analyzer
........................................................................2
- 2

2.2	Basic Operating Procedure
............................................................................2
- 3

(1)	Initialization Screen
............................................................................2
- 3

(2)	Input of Measurement Signal
................................................................2
- 3

(3)	Setting of Center Frequency
................................................................2
- 4

(4)	Setting of Frequency Span
....................................................................2
- 5

(5)	Setting of Reference Level
..................................................................2-6

(6)	How to Use the MARKER Key
....................................................................2
- 8

(7)	How to Improve Frequency Accuracy According to

the Correction Routine
..........................................................................2
- 9

(8)	Warm-up Time
..............................................................................................2
- 9

3.	DESCRIPTION OF PANEL SURFACE AND CRT DISPLAY
..........................................3 - 1

3.1	Description of Front Panel
..........................................................................3
- 2

3.2	Description of Each Key (in the NORMAL mode)
......................................3 - 5

3.3	Description of Each Key (in the SHIFT mode)
........................................3 - 6

3.4	Description of Rear Panel
............................................................................3
- 7

3.5	How to Read CRT Display Indication
..........................................................3 - 10

4.	OPERATING METHOD
..................................................................................................4
- 1

4.1	Initialization
..................................................................................................4-2

4.2	Center Frequency
..............................................................................................4
- 4

4.3	Function to Improve Center Frequency Accuracy
....................................4 - 6

(1)	AFC Function (only in R4131D/DN)
......................................................4 - 6

(2)	ZERO CALibration
......................................................................................4
- 6

(3)	CF CALibration
..........................................................................................4
- 6

(4)	CF ADJustment
............................................................................................4
- 7

4.4	Frequency Span
..................................................................................................4
- 9

(1)	What Is Zero Span (Displayed in the Time Axis)?
........................4 - 9

4.5	Interlocking Function (AUTO)
......................................................................4
- 10

4.6	Resolution Bank Width (RBW)
........................................................................4
- 11

4.7	Reference Level and Ordinate Axis Scale
................................................4 - 12

(1)	Reference Level
........................................................................................4
- 12
(2)	Quadrature Axis Scale (dB/DIV)
..........................................................4 - 12

(3)	Reference Level Step Width (COARSE/FINE)
......................................4 - 14

(4)	Unit (UNITS)
..............................................................................................4
- 14

(5)	Calibration of Ordinates Axis Level
................................................4 - 14

4.8	RF Input Attenuator
........................................................................................4
- 15

4.9	Display Line
......................................................................................................4
- 16

4.10	Marker Function
..............................................................................................4
- 17

(1)	Display of Marker
....................................................................................4
- 17

(2)	Erasing of Marker
....................................................................................4
- 17

(3)	PEAK Search
................................................................................................4
- 17

(4)	MarKer Center Frequency
..................................................................4
- 18

(5)	SIGnal TRacK
..............................................................................................4
- 19

(6)	MARKER PAUSE
..............................................................................................4
- 20

(7)	Measurement of NOISE/Hz
........................................................................4
- 21

4.11	Video Filter Band Width (VIDEO FiLTeR)
................................................4 - 22

4.12	Setting of Sweep Time
..................................................................................4
- 23

4.13	Selection of Sweep Mode/Trigger Mode
....................................................4 - 24

4.14	Display Detection Mode
................................................................................4
- 25

(1)	SAMPLE DETection
......................................................................................4
- 25

(2)	POSi PeaK DETection
................................................................................4
- 25

(3)	NORMAL DETection (POSI/NEGA DET)
......................................................4 - 26

4.15	Selection of Trace Mode
..............................................................................4
- 28

(1)	WRITE
............................................................................................................4
- 28

(2)	STORE
............................................................................................................4
- 28

(3)	VIEW
..............................................................................................................4-28

(4)	WRITE and VIEW (2-screen display)
....................................................4 - 29

(5)	MAX HOLD
......................................................................................................4
- 31

4.16	Setting Conditions and SAVE/RECALL of Displayed
Waveform ............4-33

(1 ) SAVE
..............................................................................................................4
- 34

(2) RECALL
..........................................................................................................4
- 35

4.17	Automatic Setting at Power ON
..................................................................4
- 36

4.18	Electric Field Intensity Measurement (dBu/m)
....................................4 - 37

4.19	QP Value Measurement (Quasi-peak Value Measurement)
......................4 - 39

4.20	Normalize
..........................................................................................................4
- 42

4.21	Occupied Frequency Band Width (OBW)

Measurement (only for R4131D)
..................................................................4
- 47

4.22	3dB DOWN,3dB DOWN LOOP,NEXT PEAK Function

(only for R4131D)
..........................................................................................4
- 49

4.23	Plotter Output
................................................................................................4
- 52

5.	APPLIED MEASURING METHOD
..................................................................................5
- 1

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
....................................................................5
- 7

5.2	Measurement of FM Wave
..................................................................................5
- 10

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
......................................................................................................5
- 17
6.	GPIB CONNECTION AND ITS PROGRAMMING
............................................................6 -
1

6.1	Outline of GPIB
............................................................................................6
- 2

6.2	Standards
............................................................................................................6
- 4

6.2.1	GPIB Specifications
................................................................................6
- 4

6.2.2	Interface Function
..................................................................................6
- 5

6.3	GPIB Handling Method
......................................................................................6-6

6.3.1	For Connection to Component Devices
................................................6 - 6

6.3.2	Setting of ADDRESS
SW..................................................................6
- 6

6.3.3	Programming
................................................................................................6
- 7

6.4	Setting of Each Function
.................................................................6
- 8

6.4.1	Setting of Center Frequency
................................................................6
- 9

(1)	When the Center Frequency Is Set Using the Command

for Setting the TUNING Knob
................................................................6
- 9

(2)	When the Value of Center Frequency is Set
Directly..................6-10

6.4.2	Setting of Frequency Span
....................................................................6
- 11

(1)	When Using the Command Corresponding to the Key

on Front Panel
..........................................................................................6
- 11

(2)	When the Value of Frequency Span Is Set
Directly......................6 - 12

6.4.3	Setting of Reference Level
..................................................................6
- 12

(1)	When Using the Command Corresponding to the Key

on Front Panel
..........................................................................................6
- 13

(2)	When the Value of the Reference Level Is Set Directly
............6 - 14

6.4.4	Setting of Marker
....................................................................................6
- 14

(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
......................................................................6
- 22

6.5.1	"OP" Command
..............................................................................................6
- 22

6.5.2	Format of Output Data
............................................................................6
- 23

( 1 ) Header
..........................................................................................................6
- 24

(2)	Block Delimiter
........................................................................................6-26

6.5.3	Mode String
................................................................................................6-27

6.6	Input/Output of Trace Data
..........................................................................6
- 30

6.6.1	Output of Trace Data
..............................................................................6
- 31

(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
................................................................................6
- 34

(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
................................................................................................6-37

(1)	Status Byte
................................................................................................6
- 37

(2)	Output of Status Byte
............................................................................6
- 38
6.8	Notes in Programming
......................................................................................6
- 39

(1)	Noteworthy Points in Sending a Command
..........................................6 - 39

(2)	Noteworthy Points in Spectrum Analysis when the Frequency

Span Is Made Narrower
............................................................................6
- 39

(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
..........................................................................................6
- 41

7.	INSPECTION AND MAINTENANCE
..............................................................................7
- 1

7.1	Defects and Abnormal stresses
....................................................................7
- 2

7.2	Notes in Storing and Shipping this Equipment
......................................7 - 3

8.	TECHNICAL DATA OF FUNCTION AND ACCESSORIES
..............................................8 - 1

8.1	Technical Data of Function
..........................................................................8
- 2

(1)	Frequency Specification
........................................................................8
- 2

(2)	Amplitude Specification
........................................................................8
- 3

(3)	Sweep Specification
................................................................................8
- 5

(4)	Input Specification
................................................................................8
- 5

(5)	Display Unit Specification
..................................................................8
- 5

(6)	Output Specification
..............................................................................8-6

(7)	General Specifications
..........................................................................8
- 6

8.2	Accessories
........................................................................................................8
- 7

9.	FUNCTIONAL DESCRIPTION
......................................................................................9
- 1

9.1	Outline
................................................................................................................9
- 2

9.1.1	Basic Operations
......................................................................................9
- 2

9.1.2	R4131 Series Configuration
..................................................................9
- 5

9.2	RF Block
..............................................................................................................9
- 7

9.2.1	First Mixer
................................................................................................9-8

(1)	3.6 GHz Low-pass Filter
........................................................................9
- 8

(2)	4.0 GHz Band Pass Filter
......................................................................9
- 8

(3)	First Mixer
................................................................................................9
- 8

9.2.2	Second Mixer
..............................................................................................9
- 8

(1)	4.0 GHz Band Pass Filter
......................................................................9
- 9

(2)	Second Local Oscillator
........................................................................9-9

(3)	Second Mixer
..............................................................................................9-9

9.2.3	Third and Fourth Mixers
........................................................................9
- 9

(1 ) 226.42 MHz Preamplifier
........................................................................9
- 9

(2)	Third Mixer
................................................................................................9-9

(3)	200 MHz Crystal Oscillator
..................................................................9
- 10

(4)	Gain Control Amplifier
..........................................................................9
- 10

(5)	30 MHz Crystal Oscillator
....................................................................9
- 11

9.3	YT0_C0NT/IF Board
............................................................................................9
- 12

9.3.1	IF Filter
....................................................................................................9-12

(1)	Input 3.58 MHz Band Pass Filter
........................................................9 - 13

(2)	Gain Adjust Amplifier
............................................................................9
- 13

(3)	Crystal Filter
..........................................................................................9
- 15

(4)	LC Filter
....................................................................................................9
- 15

(5)	Step Amplifier
..........................................................................................9
- 16
9.3.2 YTO Controller and AFC
..........................................................................9
-	17

( 1 ) YTO Controller
..........................................................................................9
-	18

(2)	AFC
................................................................................................................9-29

9.4	Analog Board
......................................................................................................9
-	21

9.4.1	Log Amplifier
............................................................................................9
- 21

9.4.2	Ramp Generator
..........................................................................................9
-	24

(1 ) Current Source
..........................................................................................9
- 25

(2)	Ramp Generator
..........................................................................................9
-	26

9.4.3	A/D Converter
............................................................................................9-28

(1)	X-axis A/D Converter
............................................9 -	39

(2)	Y-axis A/D Converter
..............................................................................9
-	39

9.4.4	Analyzer Test
............................................................................................9-30

10.	CALIBRATION AND ADJUSTMENTS
............................................................................10
-	1

10.1	Preparation
......................................................................................................10
-	2

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
..................................................................10
-	9

10.4.3	LC Filter Adjustment
............................................................................10
-	11

10.4.4	Resolution Bandwidth Level Adjustment
..........................................10 -	12

10.4.5	Step Amplifier Adjustment
..................................................................10
-	13

10.5	YTO_CONT Adjustment (YTO_CONT/IF Board) (BLR-015116)
....................10 -	15

10.6	RF Block Adjustment
......................................................................................10
-	19

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
-	21

1 1 . PERFORMANCE TESTING
............................................................................................11
-	1

11.1	preparation
....................................................................................................11
-	2

11.2	General Precautions
....................................................................................11
-	3

11.3	Frequency Span Accuracy
............................................................................11
-	4

11.4	Center Frequency Readout Accuracy
........................................................11 -	10

11.5	Residual
FM....................................................................................................11
-	12

11.6	Noise Sidebands
............................................................................................11
-	15

11.7	Resolution Bandwidth Accuracy
................................................................11
-	17

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
-	29

11.12	Residual Responses
....................................................................................11
-	31

11.13	Gain Compression
........................................................................................11
-	32

11.14	Frequency Response
....................................................................................11
-	34

11.15	Average Noise Level
..................................................................................11
-	37

11.16	Sweep Time
Accuracy..................................................................................11
-	39

11.17	Calibrated Output Accuracy
....................................................................11
-	42
12. MAINTENANCE DATA
..................................................................................................12
-	1

12.1	preparation
......................................................................................................12
-	2

12.2	Location Diagram (Top & Bottom)
..................................................12 -	4

12.3	Location Diagram for RF
..............................................................................12
-	6

12.4	Block Diagram
..................................................................................................12
-	7

12.5	Self Test
..........................................................................................................12
-	8

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

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