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Anritsu MS2661N Operation Manual
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Anritsu MS2661N Operation Manual

Anritsu MS2661N Operation Manual

Spectrum analyzer
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MS2661N
Spectrum Analyzer
Operation Manual
Vol. 1
(Basic Operating instructions)
Fourth Edition
Read this manual before using the equipment.
Keep this manual with the equipment.
ANRITSU CORPORATION
i
Document No.: M-W1813AE-4.0

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  • Page 1 MS2661N Spectrum Analyzer Operation Manual Vol. 1 (Basic Operating instructions) Fourth Edition Read this manual before using the equipment. Keep this manual with the equipment. ANRITSU CORPORATION Document No.: M-W1813AE-4.0...

  • Page 2: Safety Symbols

    Insure that you clearly understand the meanings of the symbols BEFORE using the equipment. Some or all of the following five symbols may not be used on all Anritsu equipment. In addition, there may be other labels attached to products which are not shown in the diagrams in this manual.

  • Page 3: For Safety

    For Safety WARNING 1. ALWAYS refer to the operation manual when working near locations at which the alert mark shown on the left is attached. If the operation, etc., is performed without heeding the advice in the operation manual, there is a risk of personal injury.
  • Page 4 WARNING 4. This equipment cannot be repaired by the user. DO NOT attempt to Repair open the cabinet or to disassemble internal parts. Only Anritsu-trained service personnel or staff from your sales representative with a knowl- WARNING edge of electrical fire and shock hazards should service this equipment.
  • Page 5 For Safety CAUTION 1. Before Replacing the fuses, ALWAYS remove the power cord from the poweroutlet and replace the blown fuses. ALWAYS use new fuses of Replacing Fuse the type and rating specified on the fuse marking on the rear panel of the cabinet.
  • Page 6 Back-up Battery the memory. This battery must be replaced by a service engineer when it has reached the end of its useful life; contact the Anritsu sales section or your nearest representative. Note: The battery used in this equipment has a maximum useful life of 7 years.

  • Page 7: Equipment Certificate

    Anritsu Corporation Contact If this equipment develops a fault, contact Anritsu Service and Sales offices at the address at the end of paper-edition manual or the separate file of CD-edition manual.

  • Page 8: Front Panel Power Switch

    Front Panel Power Switch To prevent malfunction caused by accidental touching, the front power switch of this equipment turns on the power if it is pressed continuously for about one second in the standby state. If the switch is pressed continuously for one second in the power-on state, the equipment enters the standby state.
  • Page 9 ABOUT DETECTION MODE This instrument is a spectrum analyzer which uses a digital storage system. The spectrum analyzer makes level measurements in frequency steps obtained by dividing the frequency span by the number of measure- ment data points (501). This method of measurement cannot detect the signal peak level if the spectrum of a received signal is narrower than these frequency steps.

  • Page 10: Notes On Export Management

    Notes On Export Management This product and its manuals may require an Export License/Approval by the Government of the product's country of origin for re-export from your country. Before re-exporting the product or manuals, please contact us to confirm whether they are export-controlled items or not. When you dispose of export-controlled items, the products/manuals are needed to be broken/shredded so as not to be unlawfully used for military purpose.

  • Page 11: C-Tick Marking

    C-tick Conformity marking Anritsu affixes the C-tick marking on the following product (s) in accordance with the regulation to indicate that they conform with the EMC framework of Australia/New Zealand. C-tick marking N274 1. Product Model Model: MS2661N Spectrum Analyzer 2.

  • Page 13: About This Manual

    ABOUT THIS MANUAL (1) Composition of MS2661N Operation Manuals The MS2661N Spectrum Analyzer operation manuals of the standard type are composed of the following three documents. Use them properly according to the usage purpose. Basic operating instruction part Vol. 1...

  • Page 14: Table Of Contents

    TABLE OF CONTENTS For Safety ......................... iii ABOUT THIS MANUAL ....................I SECTION 1 GENERAL ..................... 1-1 Product Outline ..........................1-3 Composition of Operation Manual ....................1-4 Equipment Configuration ......................1-5 Standard configuration ....................1-5 Options .......................... 1-6 Optional Accessories and Peripherals ..................1-7 Specifications ..........................
  • Page 15 SECTION 4 SOFT-KEY MENU ................. 4-1 Soft-key Menu List ........................4-4 Menu Tree ............................ 4-6 SECTION 5 BASIC OPERATION PROCEDURE ............. 5-1 Signal Display ..........................5-3 Turn the power on ......................5-3 Set the signal to the center of the screen ............... 5-4 Enlarge and display the signal ..................
  • Page 16 SECTION 7 STORAGE AND TRANSPORTATION ..........7-1 Cleaning Cabinet .......................... 7-3 Storage Precautions ........................7-4 Precautions before storage .................... 7-4 Recommended storage precautions ................7-4 Repacking and Transportation ..................... 7-5 Repacking ........................7-5 Transportation ....................... 7-5 APPENDIX A FRONT AND REAR PANEL LAYOUT ..........A-1 APPENDIX B BLOCK DIAGRAM ................
  • Page 17 GENERAL This section outlines the MS2661N Spectrum Analyzer and explains the composition of this manual, the configuration of the MS2661N with the standard accessories, the options, the optional accessories, and peripherals for expanding the MS2661N capabilities, and the MS2661N specifications.
  • Page 18 SECTION 1 GENERAL (Blank)

  • Page 19: Section 1 General

    SECTION 1 GENERAL Product Outline The MS2661N (henceforth called "this unit") is a portable type color LCD spectrum analyzer suited for signal analysis of radio equipment where the efficiency of frequency usage is increased and equipment are increasingly speeded and digitized.

  • Page 20: Composition Of Operation Manual

    Basic operation procedures for operation guide BASIC OPERATION PROCEDURE SECTION 6 Tests used for checking performance PERFORMANCE TESTS SECTION 7 Cautions on storage and transportation STORAGE AND TRANSPORTATION APPENDIX A MS2661N FRONT AND REAR PANEL LAYOUT APPENDIX B BLOCK DIAGRAM...

  • Page 21: Equipment Configuration

    SECTION 1 GENERAL Equipment Configuration This paragraph describes the configuration of the MS2661N Spectrum Analyzer with standard accessories and the various options to expand the functions. Standard configuration The table below shows the configuration of the MS2661N with the standard accessories.

  • Page 22: Optional Accessories And Peripherals

    SECTION 1 GENERAL Optional Accessories and Peripherals The following table shows the optional accessories and peripherals for MS2661N which are all sold separately. Optional Accesories Model † - Order No. † Name Remarks J0561 Coaxial cord, 1 m N-P-5W•5D-2W•N-P-5W J0104A Coaxial cord, 1 m BNC-P•RG-55 / U•N-P-5W...

  • Page 23: Specifications

    SECTION 1 GENERAL Specifications MS2661N specifications are listed in the following table. Frequency range 100 Hz to 3.0 GHz Resolution: A digit in 5 hundredths of span (1 Hz min.), but fractions are rounded ± ( (Indicated frequency × reference frequncy accuracy) +...
  • Page 24 SECTION 1 GENERAL (Continued) Measurement range Average noise level to +30 dBm ≤ –90 dBm (at 200 kHz to 3.0 GHz, 0 dB input attenuator) Level ≤ –65 dBm (at 100 Hz to 500 Hz, 0 dB input attenuator) measurement Residual response ≤...
  • Page 25 SECTION 1 GENERAL (Continued) Sweep time Frequency Setting range: 20 msec to 1000 sec domain Can be set manually or automatically coupled with span, resolution bandwidth, and video bandwidth Accuracy: ±15% (20 msec to 100 sec) Setting range: 12.5 µsec to 1000 sec Time domain Accuracy: ±1% (100 µsec to 100 sec) Sweep mode...
  • Page 26 SECTION 1 GENERAL (Continued) Signal search AUTO TUNE, PEAK→CF, PEAK→REF, SCROLL Zone marker NORMAL, DELTA MARKER →CF, MARKER→REF MARKER→CF STEP SIZE, ∆ MARKER→SPAN Marker→ ZONE→SPAN Peak search PEAK, NEXT PEAK, MIN DIP, NEXT DIP Multi marker HIGHEST 10, HARMONICS, MANUAL SET Noise level measurement (dBm/Hz, dBm/ch) C/N measurement (dBc/Hz, dBc/ch) Occupied frequency bandwidth measurement...
  • Page 27 SECTION 1 GENERAL (Continued) Dimension 177 (H), 320 (W), 351 (D) mm ≤ 15 kg Weight 115 Vac operation 85 to 132 V, 3.0 A rms max, 47.5 to 63Hz, 380Hz to 420Hz Power requirements 230 Vac operation 170 to 250 V, 1.5 A rms max, 47.5 to 63 Hz ≤...
  • Page 28 SECTION 1 GENERAL (Blank) 1-12...
  • Page 29 PREPARATIONS BEFORE USE This section explains the preparations and safety procedures that should be performed before using the MS2661N Spectrum Analyzer. The safety procedures are to prevent the risk of injury to the operator and damage to the equipment. Insure that you understand the contents of the pre-operation preparations before using the MS2661N.
  • Page 30 SECTION 2 PREPARATIONS BEFORE USE (Blank)

  • Page 31: Section 2 Preparations Before Use

    Remove the MS2661N and accessories after undoing the packing case. Save the packing case and spacers, etc. if it might be reshipped again sometime. The standard MS2661N consists of the following items. If any part is missing or if the MS2661N has been damaged in transport, contact your sales representative immediately.

  • Page 32: Locations To Be Avoided

    CAUTION If the MS2661N is used at normal temperatures after it has been used or stored for a long time at low temperatures, there is a risk of short-circuiting caused by condensation. To prevent this risk, do not turn the MS2661N on until it has been allowed to dry out sufficiently.
  • Page 33 Push the pivots of the handle inward and rotate it until it clicks into the new position. CAUTION To suppress any internal temperature increase, the MS2661N has a fan on the rear panel as shown in the diagram below. Leave a gap of at least 10 cm between the rear panel and the wall, nearby equipment or obstructions so that fan ventilation is not blocked.

  • Page 34: Rack Mounting

    SECTION 2 PREPARATIONS BEFORE USE Rack mounting The B0395B Rack Mount Kit (sold separately) is required to mount the MS2661N in a rack. The installation method is included in the rack mount kit diagram.

  • Page 35: Preparations Before Power-On

    Preparation Before Power-on The MS2661N operates normally when it is connected to an 85 to 132 Vac/47.5 to 63Hz, 380 to 420 Hz, or 170 to 250 Vac (automatic voltage change) 47.5 to 63 Hz AC power supply. To prevent the following problems, take the necessary procedures described on the following pages before power is supplied.

  • Page 36: Protective Grounding

    (1) Grounding with 3-pole power outlet When connecting to a 3-pole (grounded, 2-pole type) AC power-supply outlet, the frame of the MS2661N is connected to ground potential. As a result, it is not necessary to connect the FG terminal to ground.

  • Page 37: Connecting Power Supply

    AC outlet. If not Off, push the power switch on the rear panel to Off. • Connect the attached power cord to the AC power inlet at the rear of the MS2661N, and connect the other end to the AC outlet.

  • Page 38: Power On

    Power On Standby • After connecting the MS2661N to the AC outlet, press the power switch on the upper-right corner of the rear panel to turn on the MS2661N. The MS2661N enters standby mode, and the “stby” indicator (green) on the left side of the front panel comes on.

  • Page 39: Power On

    Press the power switch on the left side of the front panel for one second or more in standby mode to turn on the power of the MS2661N. Stby The “stby” indicator goes off, the “On” indicator (orange) comes on, then power is supplied to the MS2661N. MS2661N The power-on screen is displayed Spetctrum Analyzer for about 40 seconds.
  • Page 40 Very-high, dangerous voltages are used in the MS2661N, if insufficient care is taken, there is a risk of a accidential electric shock being received or of damage to the equipment.

  • Page 41: Connecting To Device Under Test

    SECTION 2 PREPARATIONS BEFORE USE Connecting to Device Under Test Connect the signals to be measured to the RF connector using a coaxial cable (J0561, N-P-5W•5D2W•N-P- 5W). RF Input 50Ω Fully insert the cable jack into the RF Input connector. Frequency range: 100 Hz to 3 GHz Measurement level: Apply the measured signal with average noise level of up to +30 dBm to the N-type connector RF...

  • Page 42: Internal Calibration

    Internal calibration takes about four minutes. If the MS2661N is used in a thermally stable environment such as an office, after the first internal calibration; there is no need to perform internal calibration, repeatedly. If there is a big change in the temperature, perform an internal calibration.

  • Page 43: Using The Memory Card

    PROTECTED side, and then install it to the MS2661N. (For the setting method, see the operation manual of the card.) • Installing Memory Card Install the memory card to the MS2661N, with the cutout of the card at the position as shown below. Two card can be installed at the upper and lower sides. Memory Card Cutout •...

  • Page 44: Using The Rs-232C Interface

    See Section 2 in the Operation Manual Vol.3 “Programming (Remote Control)”. Reprogramming The software of the MS2661N is stored in a ROM (read only memory) installed when the MS2661N is shipped from the factory. Therefore, it is unnecessary to load the software in the MS2661N.

  • Page 45: Power Off

    SECTION 2 PREPARATIONS BEFORE USE Power-off Press the power switch on the front panel for one second or more while the power is on to set the MS2661N in standby mode. The “ON” indicator goes off, the “stby” indicator comes on, and the screen becomes blank.

  • Page 46: Replacing Fuse

    Replacing Fuse The MS2661N with standard accessories has two spare 5 A fuses. The fuses are mounted in the fuse holder and must be replaced if they blow. If the fuses must be replaced, locate and remedy the cause before replacing the blown fuses.
  • Page 47 SECTION 2 PREPARATIONS BEFORE USE After performing the safety procedures described on the preceding page, replace the fuses according to the following procedure. Step Procedure Set the front-panel [Power] switch to Stby and the rear-panel [Line] switch to OFF. Then, remove the power cord from the power-supply outlet.
  • Page 48 SECTION 2 PREPARATIONS BEFORE USE (Blank) 2-20 .
  • Page 49 SECTION 3 PANEL DESCRIPTION SECTION 3 PANEL DESCRIPTION In thi s section, the front and rear panels are described about the case in which all the options are attached to. TABLE OF CONTENTS Table of Front Panel Features ......................Description of Screen Display ......................
  • Page 50 SECTION 3 PANEL DESCRIPTION (Blank)

  • Page 51: Section 3 Panel Description

    SECTION 3 PANEL DESCRIPTION SECTION 3 PANEL DESCRIPTION In this section, the front and rear panels (Figs. 3-1 and 3-2) are described about the case in which all the options are attached to. Table of Front Panel Features Panel Making Explanation of Function (LCD) This is a 5.7 ”...
  • Page 52 [Trig/Gate] Sets the sweep-start trigger and gate(to control wave- form-data write timing) functions. [TV Monitor] Don't use in MS2661N. Coupled Function This sets the RBW, VBW, sweep time and input attenuator. Entry These keys set the numeric data, units and special functions.

  • Page 53: Explanation Of Function

    SECTION 3 PANEL DESCRIPTION Panel Making Explanation of Function [Rotary knob] Used for moving marker and inputting data. [∨, ] Increments and decrements input data. [Shift] To execute panel functions indicated by blue letters, press this key and then press the blue-lettered key. [BS] Backspace key for correcting input mistakes.
  • Page 54 SECTION 3 PANEL DESCRIPTION...
  • Page 55 SECTION 3 PANEL DESCRIPTION (Blank)
  • Page 56 SECTION 3 PANEL DESCRIPTION Panel Making Explanation of Function (Fan) This is the cooling fan for ventilating internally-generated heat. Leave a clearance of at least 10 cm around the fan. 10 MHz STD This is the input connector for an external reference crystal oscillator. When an external reference signal is input, the equipment switches automatically from the internal signal to the external signal.
  • Page 57 SECTION 3 PANEL DESCRIPTION...

  • Page 58: Description Of Screen Display

    SECTION 3 PANEL DESCRIPTION Description of Screen Display Display items on the screen are explained in the 4 types. Common display item --- commonly displayed items Frequency-domain display item --- displayed items in frequency domain trace Time-domain display item --- displayed items in time domain trace (zero span mode) Menu display items --- displayed items at soft-key menus •...
  • Page 59 SECTION 3 PANEL DESCRIPTION 14. Current marker Displays at maximum or minimum point within the Marker zone. The frequency in frequency domain (time in time domain) and level are displayed at the item of the 1 Marker, above. 15. Marker zone Displays the Marker zone with a dotted rectangular.
  • Page 60 SECTION 3 PANEL DESCRIPTION 3-12...
  • Page 61 SECTION 3 PANEL DESCRIPTION 3-13...
  • Page 62 SECTION 3 PANEL DESCRIPTION (Blank) 3-14 .
  • Page 63 SECTION 4 SOFT-KEY MENU SECTION 4 SOFT-KEY MENU In this section, soft-key menu functions and its hierarchical system are described using a tree. TABLE OF CONTENTS Soft-key Menu List ..........................Menu Tree ............................
  • Page 64 SECTION 4 SOFT-KEY MENU (Blank)

  • Page 65: Section 4 Soft-Key Menu

    [More] key. (7) Panel keys and soft keys prefixed by a sharp symbol (#) at the left of the menu frame, give an outline explanation of the function. (8) The menu with ! mark cannot be used on the MS2661N.

  • Page 66: Soft-Key Menu List

    SECTION 4 SOFT-KEY MENU Soft-key Menu List Menu Menu Tree(page/28) Menu Menu Tree(page/28) H) Hold Count A) A/B,A/BG Impedance A/Time Initialize ACP Setup1 Interface ACP Setup2 Item , 20 Ajd ch Pwr L) Lib Exec Amplitude Lib File Attenuator Lib Memory Avg Count Lib Prgm B) Burst Pwr...
  • Page 67 SECTION 4 SOFT-KEY MENU Menu Menu Tree(page/28) Menu Menu Tree(page/28) P) Paper Size T) Temp Meas Peak Plotter Threshold Pon State Title Pre Ampl Trace A,B , 15 Preset Trace Calc Printer Trace Move Trace Time , 18 PTA Lib TrackingAd R) RBW Trnsformer...

  • Page 68: Menu Tree

    SECTION 4 SOFT-KEY MENU Menu Tree ( /27) Menu Tree Panel Key Top menu Lower menues Menu Tree ( 1 /27) Panel Key Top menu Lower menues Frequency Frequency • Set items related to frequency, including the center frequency, start/stop Center frequency, peak->CF, auto synchronization, frequency step size and scroll Freq...
  • Page 69 Correction Select Setup Media Load Mem Card-1 #2 The menu with ! mark cannot be used Correction Corr-1 Corr Set (Upper Slot) on the MS2661N. Display Mem Card-2 Select Corr-2 Directory (Lower Corr /Next Slot) Dir Disp Corr-3 Detail •...
  • Page 70 RB,VB,SWT Auto All Auto Attenuator • Set the manual/auto of the input attenuator, On/Off of the pre-amplifier and Atten all auto. Manual Auto • The menu with ! mark cannot be used on the MS2661N. Pre Ampl All Auto...
  • Page 71 SECTION 4 SOFT-KEY MENU Menu Tree ( /27) Panel Key Top menu Lower menues • Set the selection of normal/delta/no marker, zone marker width, marker->, Marker Marker marker search mode, display line, marker tracking On/Off, zone sweep On/ Normal Off, etc. Marker #1 Selects whether to search for maximum (Peak) or minimum (Dip) Delta...
  • Page 72 SECTION 4 SOFT-KEY MENU Menu Tree ( /27) Panel Key Top menu Lower menues • Set maximum level search, next peak, next right peak, next left peak, Marker- Peak Peak Search >, minimum level search, next minimum level, search level resolution, Peak Search threshold level On/Off, etc.
  • Page 73 SECTION 4 SOFT-KEY MENU Menu Tree ( /27) Panel Key Top menu Lower menues Peak →CF Peak →RLV Single Continuous Single User User1 User2 User3 |1| | | | |2| | | | |3| • The soft-key menu defined by the user is displayed. (See "User Define".) 4-11...
  • Page 74 SECTION 4 SOFT-KEY MENU Menu Tree ( /27) Panel Key Top menu Lower menues Measure Freq Count Measure Frequency Count On Count Noise Measure C/N Ratio Measure Count Off CountSetup Resolution Setup 1kHz return 100Hz |1| | | Noise Meas 10Hz Meas On return...
  • Page 75 SECTION 4 SOFT-KEY MENU Menu Tree ( /27) Panel Key Top menu Lower menues Measure Occ BW Occ BW Execute Measure Adj ch pwr Measure Mask OBW Setup Setup Method N% of Pwr xdB Down return N% Ratio | |2| | 99 % xdB Value 10.0 dB...
  • Page 76 SECTION 4 SOFT-KEY MENU Menu Tree ( /27) Panel Key Top menu Lower menues (Previous Page) (Previous Page) Mask Meas Select Line Limit 1 Check Mask-1 Upper Pass/Fail Limit 1 Mask-2 Lower Limit 2 Select Mask-3 Upper Mask Table Limit 2 Move Mask Mask-4 Lower...
  • Page 77 SECTION 4 SOFT-KEY MENU Menu Tree ( /27) Panel Key Top menu Lower menues Measure Temp Meas Select Line Time Limit 1 Check Temp-1 Template Upper Pass/Fail Burst Limit 1 Temp-2 Avg Power Lower Limit 2 Select Temp-3 Upper Temp Table Limit 2 Move Temp-4...
  • Page 78 SECTION 4 SOFT-KEY MENU Menu Tree ( /27) Panel Key Top menu Lower menues (Previous Page) (Previous Page) Burst Pwr Execute Start Point Stop Point return 4-16...
  • Page 79 SECTION 4 SOFT-KEY MENU Menu Tree ( /27) Panel Key Top menu Lower menues Recall Recall Recall-1 Recall ABCDEFG Recall-7 Recall ABCDEFG Recall Recall Recall-2 from Recall Recall-8 Int.Regstr from Display Mem Card Recall-3 Directory Display Recall-9 /Next Directory /Next Recall-4 Dir Disp Recall-10...
  • Page 80 SECTION 4 SOFT-KEY MENU Menu Tree ( /27) Panel Key Top menu Lower menues Save Save • Save trace waveform/parameters to the internal memory or memory card. Recall Save Select saved media, and display file directories. Int.Regstr Display Directory /Next |1| | Save Save...
  • Page 81 SECTION 4 SOFT-KEY MENU Menu Tree ( /27) Panel Key Top menu Lower menues • Set ON/OFF and output level of tracking generator. Trace A,B #1 Normalize trace-A waveform data, and display it. TG Out Trace A Output Level Trace B 0 dBm Attenuator Hold...
  • Page 82 SECTION 4 SOFT-KEY MENU Menu Tree ( /27) Panel Key Top menu Lower menues Trace Move Trace A,B Trace Calc Normalize A->B Trace A (A-B+DL) Ref Line B->A Trace B A<->B Trace Moddle Move A+B->A Trace Bottom Ref Line Calc Storage return Detection...
  • Page 83 SECTION 4 SOFT-KEY MENU Menu Tree ( /27) Panel Key Top menu Lower menues A/B,A/BG • Simultaneously display two waveforms, namely Trace A and Trace B or A/B,A/BG Trace A and Trace BG (peripheral spectrum containing Trace A). The large (A<B) display is Main Trace and the small one is Sub Trace;...
  • Page 84 SECTION 4 SOFT-KEY MENU Menu Tree ( /27) Panel Key Top menu Lower menues • Set to the zero-span time domain display. Set Time Span, Trigger, Trigger Trace Time Time Source, Storage, Detection and FM Monitor On/Off, and select Expand Delay Time 10.0 ms (waveform).
  • Page 85 SECTION 4 SOFT-KEY MENU Menu Tree ( /27) Panel Key Top menu Lower menues Trig Video Trigger Trigger Trigger /Gate Trig Level Freerun High, Middle, Low Wide IF -50dB Triggered Trig Ext Source Trig Level Trigger High Source -10 to 10V Video Wide IF Video...
  • Page 86 SECTION 4 SOFT-KEY MENU Menu Tree ( /27) Panel Key Top menu Lower menues TV Monitor Trig/Gate 4-24...
  • Page 87 SECTION 4 SOFT-KEY MENU Menu Tree ( /27) Panel Key Top menu Lower menues Copy Paper Size Copy Cont Copy Cont Copy Printer Full Size Printer Plotter Quarter HP2225 Size Plotter BMP file HP-GL VP-600 To MemCard GP-GL (ESC/P) Paper Feed Paper Size Stop Print...
  • Page 88 ( /27) Panel Key Top menu Lower menues • The menu with ! mark cannot be used on the MS2661N. Sound #1 Sets whether the coupled settings for RBW, VBW, etc., in frequency and time domain, independent or common. #2 Changes screen color pattern.
  • Page 89 SECTION 4 SOFT-KEY MENU Menu Tree ( /27) Panel Key Top menu Lower menues • Execute calibration. Select an item from All Cal, Level Cal and Freq Cal. All Cal Level Cal Freq Cal FM Cal Preslctr Tuning Freq Cal <Calibration status screen>...
  • Page 90 SECTION 4 SOFT-KEY MENU Menu Tree ( /27) Panel Key Top menu Lower menues • Set interfaces for external devices to connect. Select RS232C, or GPIB, and set the RS232C interface, GPIB address, etc. Interface Interface RS232C RS232C Setup Baud Rate GPIB 4800 My Address...
  • Page 91 SECTION 4 SOFT-KEY MENU Menu Tree ( /27) Panel Key Top menu Lower menues Mem Card Mem Card Directory File Ope Directory Display Trace Directory /Next Format Dir Disp Correction Detail Outline Mask Template Delete Define File Menus Protection Select Media return return...
  • Page 92 SECTION 4 SOFT-KEY MENU Menu Tree ( /27) Panel Key Top menu Lower menues (Previous page) (Previous page) PTA Lib Lib Memory Lib Exec Library Memory Cursor Library File Cursor Stop Down Execute Cont Library Reset /Page Remove return return etc. Lib Remove Lib File Cursor Cursor...
  • Page 93 SECTION 4 SOFT-KEY MENU Menu Tree ( /27) Panel Key Top menu Lower menues Define Define Def Menus Lib Prgm Select * Define Source Menus Lib Prgm Select Edit Source Menu Down Menu Select Dest Next Page Menu Initialize Menus   Set source into Dest Load/Save...
  • Page 94 SECTION 4 SOFT-KEY MENU Menu Tree ( /27) Panel Key Top menu Lower menues • Initialize measurement parameters. Select one from All, Sweep, Trace, Level Preset Preset Preset and Frequ/Time. Preset Sweep controll Preset Trace Parameters Preset Level Parameters Preset Freq/Time Parameters Hold...
  • Page 95 SECTION 5 BASIC OPERATION PROCEDURE SECTION 5 BASIC OPERATION PROCEDURE TABLE OF CONTENTS Signal Display ............................. Turn the power on ........................Set the signal to the center of the screen ................... Enlarge and display the signal ....................Marker Operation ..........................Check of the zone marker function .....................
  • Page 96 SECTION 5 BASIC OPERATION PROCEDURE (Blank)

  • Page 97: Section 5 Basic Operation Procedure

    SECTION 5 BASIC OPERATION PROCEDURE SECTION 5 BASIC OPERATION PROCEDURE The basic operation procedure of this equipment are <Actual operations> Signal display explained here. The operations are listed on the right. Also, the explanation willl advance assuming that a 1) Turn the power on, 500 MHz signal is applied to the input connector.

  • Page 98: Set The Signal To The Center Of The Screen

    SECTION 5 BASIC OPERATION PROCEDURE Set the signal to the center of the screen Press Frequency key. When pressing Frequency, Span, Amplitude or Coupled Function key(s) which is used frequently, Center Frequency, Span, Reference Level, RBW or VBW function is selected and numeric value for the function can be entered into Entry area.

  • Page 99: Enlarge And Display The Signal

    SECTION 5 BASIC OPERATION PROCEDURE Enlarge and display the signal Press Span key , then press the V down key several times to enlarge the signal display. Fig. 5-5...

  • Page 100: Marker Operation

    SECTION 5 BASIC OPERATION PROCEDURE Marker Operation Here, checks that the signal frequency and level are displayed in a marker display area. The zone marker automatically fetches the highest level signal within the zone and displays the frequency and level. Fig.
  • Page 101 SECTION 5 BASIC OPERATION PROCEDURE Press Peak Search key. *Advanced operation memo: It is convenient that the page can also be turned over by repeatedly pressing the panel key. This method is used when key(s), such as Measure key, has a number of pages.

  • Page 102: Measure" Function Check

    SECTION 5 BASIC OPERATION PROCEDURE "Measure" Function Check Press Preset key and Preset All Parameters key in order. Press Peak Search key. If the zero beat signal level (local feed though) is larger than the signal level and the marker fetches the zero beat level, press "Next peak"...

  • Page 103: Screen Hard Copy

    SECTION 5 BASIC OPERATION PROCEDURE Screen Hard Copy The screen can be hard-copied with the VP-600 printer (Epson) via an RS-232C interface, and the procedures are described below: As illustrated below, connect the RS-232C connector and printer with an attached RS-232C cable. Press the Copy key, and the currently displayed screen is hard-copied.
  • Page 104 SECTION 5 BASIC OPERATION PROCEDURE (Blank) 5-10 .
  • Page 105 SECTION 6 PERFORMANCE TESTS SECTION 6 PERFORMANCE TESTS In this chapter, measuring instruments, setup and operations necessary for conducting performance tests of MS2661N are described. TABLE OF CONTENTS Requirement for Performance Tests ....................Instruments Required for Performance Test ..................Performance Test ..........................
  • Page 106 SECTION 6 PERFORMANCE TESTS (Blank)

  • Page 107: Section 6 Performance Tests

    Performance tests are used as preventive maintenance to prevent degradation of the MS2661N performance before it occurs. Use the performance tests whenever necessary such as at acceptance and periodic inspection of the MS2661N and to verify performance after repair. Execute the performance tests listed below to verify the MS2661N performance at acceptance inspection, periodic inspection and after repair.

  • Page 108: Instruments Required For Performance Test

    SECTION 6 PERFORMANCE TESTS Instruments Required for Performance Test A list of instruments required for performance test is shown below. Instruments Required for Performance Test ( 1/2 ) Recommended instrument Test item Required Performance † name ( Model name ) Synthesized signal •...
  • Page 109 SECTION 6 PERFORMANCE TESTS Instruments Required for Performance Test ( 2/2 ) Recommended instrument Test item Required Performance † name ( Model name ) Power meter ( ML4803A ) • Main instrument accuracy Frequency response ±0.02 dB Input-attenuator switching error •...

  • Page 110: Performance Test

    The warm-up time depends on the test item. For test item other than oscillator frequency, warm-up the equipment for at least for thirty minutes and test the performance after the MS2661N stabilizes completely. Also, begin measurement after taking the warm-up time of the calibration instrument into full consideration. In addition, the test must be conducted at room temperature;...
  • Page 111 Set the changeover switch ( FREQ STD: INT / EXT ) on the MF1601A counter rear panel to EXT. Set the AC line power supply switch on the MS2661N rear panel to On and then the Power switch on the MS2661N front panel to On.
  • Page 112 Set up the MS2661N in a constant-temperature chamber at 25˚C in the same setup. Set the LINE and Power switches on the MS2661N to On and wait until the MS2661N internal temperature stabilizes ( approx. 1.5 hours after the chamber temperature stabilizes ).

  • Page 113: Center Frequency Readout Accuracy

    Center frequency readout accuracy Add the known frequency which serves as the center frequency reference to the MS2661N as shown in the figure below and set CF ( same value as the known reference frequency ) and SPAN. At this time, check that the difference between the reading of the marker readout frequency ( thick arrow in the figure ) of the center frequency peak point, and the CF set value is ≤...

  • Page 114: Center-Frequency Readout-Accuracy Test

    SECTION 6 PERFORMANCE TESTS (2) Test instruments • Synthesized signal generator: MG3633A (3) Setup Marker display frequency MKR : 500.0010MHz Spectrum Analyzer MS2661N Freq/Ampl Marker Entry 100Hz–1.8GHz Shift Multi Mkr Menu On/Off Preset Frequency Marker Marker Remote Peak Span Search...
  • Page 115 Set the signal generator output level to approx –10 to –20 dBm. (5) Procedure Step Procedure Press the MS2661N [ Preset ] key, and then Preset All key. Operate Freq Cal. Set the signal generator output frequency equal to the center frequency (500 MHz) in the following table.

  • Page 116: Frequency Span Readout Accuracy

    SG. The frequency difference between the peak levels at the 1st and 9th divisions is equal to the frequency span × 0.8. (1) Specifications Frequency span accuracy: ±5% • (2) Test instrument • Synthesized signal generator: MG3633A (3) Setup MS2661N Spectrum Analyzer Measure frequency Freq/Ampl Marker Entry 100Hz–1.8GHz Shift Multi Mkr...
  • Page 117 Step Procedure Press the [ Preset ] key, and then Preset All key. Operate Freq Cal. Connect the MG3633A output to the MS2661N RF Input. Set the MS2661N as shown below: Span ............2 kHz Center Freq .......... 1000 MHz Set the MG3633A output frequency to the f frequency ( 999.9992 MHz ) shown in the table...
  • Page 118 SECTION 6 PERFORMANCE TESTS Frequency-Span Readout-Accuracy Test MS2661N Signal generator Span Center Minimum ' - f Maximum Span frequency value value 2 kHz 999.9992 MHz 1000.0008 MHz 1.9 kHz 2.1 kHz 20 kHz 999.992 MHz 1000.008 MHz 19 kHz 21 kHz 200 kHz 999.92 MHz...

  • Page 119: Resolution Bandwidth (Rbw)

    SECTION 6 PERFORMANCE TESTS Resolution bandwidth ( RBW ) If there are two input signals with the frequency difference corresponding to 3 dB bandwidth ( of IF final stage ), these signals can be resolved as two spectrum waveforms. This is called the resolution bandwidth. 3 dB 3 dB 60 dB...
  • Page 120 SECTION 6 PERFORMANCE TESTS (3) Setup OCCBW : 30.6kHz CTR : 99.9996MHz MS2661N Spectrum Analyzer Freq/Ampl Marker Entry 100Hz–1.8GHz Shift Multi Mkr Menu On/Off Preset Frequency Marker Marker Remote Peak Span Search Local Amplitude User Peak Continuous Copy Cont Single...
  • Page 121 Press the [ Preset ] key, and then Preset All key. Perform all calibration ( ALL CAL: Refer to SECTION 8 in the Detailed Operating Instruc- tion Part of the separate operation manual ). Set the MS2661N as shown below: Center Freq ..........100 MHz Span ............5 MHz RBW ( MANUAL ) ........
  • Page 122 SECTION 6 PERFORMANCE TESTS Resolution Bandwidth ( 3 dB ) Resolution bandwidth Frequency span 3 dB bandwidth 1 MHz 5 MHz 300 kHz 500 kHz 100 kHz 200 kHz 30 kHz 50 kHz 10 kHz 20 kHz 3 kHz 5 kHz 1 kHz 2 kHz 300 Hz...

  • Page 123: Sideband Noise

    When the resolution bandwidth is set to a fixed value and a signal that has far less sideband-noise level than the equipment to be tested (MS2661N) is input, check the level of the noise as compared to the peak signal (dBc) at the specified frequency away from the peak.
  • Page 124 SECTION 6 PERFORMANCE TESTS (4) Procedure Step Procedure Press the [ Preset ] key, and then Preset All key. Operate All Cal. Set the MG3633A output to 1000 MHz and 0 dBm. Set the MS2651A/MS2661A as shown below: Center Freq ........1.000 030 GHz Span ............

  • Page 125: Frequency Measurement Accuracy

    ≤ ( Readout frequency × reference oscillator accuracy ± ( 1 count ) ) • Accuracy: • Resolution: 1 Hz, 10 Hz, 100 Hz, 1 kHz (2) Test instrument • Signal generator: MG3633A (3) Setup MS2661N Spectrum Analyzer 100Hz–1.8GHz Freq/Ampl Marker Entry Shift Multi Mkr Menu On/Off Preset Frequency...
  • Page 126 Procedure Press the [ Preset ] key, and then Pseset All key. Set the MG3633A to 500 MHz and –10 dBm. Set the MS2661N as shown below: Center Freq ..........500 MHz Span ............5 kHz Press the [Measure] key and set to Frequency Count. Press Setup and set Resolution to 1 Hz.

  • Page 127: Amplitude Display Linearity

    ± 1 dB for 0 to – 70 dB ( RBW ≤ 100 kHz ) ± 0.5 dB for 0 to – 20 ( RBW ≤ 1 MHz ) (2) Test instruments • Signal generator: MG3633A • Attenuator: MN510C (3) Setup MS2661N Spectrum Analyzer 100Hz–1.8GHz Freq/Ampl Marker Entry Shift Multi Mkr Menu On/Off Preset...
  • Page 128 Press the [ Preset ] key. Operate All Cal. Set the MG3633A to 100 MHz and 0 dBm. Set the MN510C to 0 dB. Set the MS2661N as shown below: Center Freq ..........100 MHz Span ............10 kHz Reference Level ........0 dBm Attenuator ...........
  • Page 129 SECTION 6 PERFORMANCE TESTS Step Procedure As shown on Fig. (b), read the level of the current marker when the MN510C is set at 5dB. An error is determined as calibrated ATT 5 dB value + ∆ marker level. Add a marker level corresponding to the calibrated ATT value when the MN510C is set as 10 to 90 DB (with 5 dB steps) and determine the error.
  • Page 130 SECTION 6 PERFORMANCE TESTS Log Display Linearity ( 10 dB / div ) MN510C setting Error ( dB )=A+B MN510C ∆ marker level (dB) calibration ( dB ) value ( dB ) 0 ( reference ) 0 ( reference ) 0 ( reference ) 6-26...

  • Page 131: Frequency Response

    ± 1.5 dB ( 100 Hz to 1.8 GHz ) (2) Test instruments • Signal generator: MG3633A • Power meter: ML4803A • Power sensor: MA4601A (3) Setup MS2661N Spectrum Analyzer 100Hz–1.8GHz Freq/Ampl Marker Entry Shift Multi Mkr Menu On/Off Preset Frequency Marker...
  • Page 132 Press the [ → CF ] key. Set the marker mode to delta marker. Set the MS2661N center frequency as shown in the tables on the next page, then obtain the deviation from the formula below by reading the delta marker level at each frequency.
  • Page 133 SECTION 6 PERFORMANCE TESTS Frequency Response Frequency Calibration value ( dBm ) Marker level ( dB ) Deviation ( dB ) 100 MHz 0 dB (reference) 0 dB (reference) 0 dB (reference) 200 MHz 500 MHz 1 GHz 1.5 GHz 6-29...

  • Page 134: Second Harmonic Distortion

    The second harmonic level is the highest harmonic displayed on the MS2661N. The main point of the test is to apply a signal (with a distortion that is lower than the MS2661N internal harmonic distortion [ at least 20 dB below ] ) to the MS2661N and measure the level difference between the fundamental wave and the second harmonic.
  • Page 135 Set the LPF cut-off frequency to approx. 12.8 MHz. Set the SG output frequency to 10 MHz and the output level to – 40 dBm. Set the MS2661N as shown below: Center Freq ..........10 MHz Span ............10 kHz Reference Level ........
  • Page 136 Set the LPF cut-off frequency to approx. 1.2 GHz. Set the SG as follows: OUTPUT FREQ ........900 MHz OUTPUT LEVEL ........ – 40 dBm Set the MS2661N as follows: Center Freq ..........900 MHz Span ............10 kHz Reference Level ........– 40 dBm Attenutor ............

  • Page 137: Input Attenuator Switching Error

    Input attenuator switching error: (2) Test instruments • Signal generator: MG3633A • Attenuator: MN510C • Power meter: ML4803A • Power sensor: MA4601A (3) Setup MS2661N Spectrum Analyzer Freq/Ampl Marker Entry 100Hz–1.8GHz Shift Multi Mkr Menu On/Off Frequency Preset Marker Marker Remote Peak...
  • Page 138 Adjust the signal-generator output level so that the indicated value of the power meter is – 10.0 dBm. Connect the coaxial cable of the attenuator output to the MS2661N RF Input. Press the MS2661N [ → CF ] key. Set the MS2661N reference level to –10 dBm and attenuation to 60 dB.
  • Page 139 SECTION 6 PERFORMANCE TESTS Calibration MS2661N setting Marker level MN510C value of Error Deviation value setting REF LEVEL attenuator – 10 dBm 60 dB 0 dB – 20 dBm 50 dB 10 dB – 30 dBm 40 dB 20 dB –...

  • Page 140: Sweep Time And Time Span Accuracy

    • Sweep time accuracy: ± 1% ( 100µsec to 100sec ) • Time span accuracy: (2) Test instruments • Signal generator: MG3633A Wiltron 6769A (3) Setup MS2661N Spectrum Analyzer Freq/Ampl Marker Entry 100Hz–1.8GHz Shift Multi Mkr Menu On/Off Frequency Preset...
  • Page 141 Set the MS2661N marker zone width to 5 Hz ( Zone Width = 5 Hz ). Move the MS2661N marker to the left of the screen using the knob and set the zone marker on the leftmost peak of the sine wave.
  • Page 142 SECTION 6 PERFORMANCE TESTS Step Procedure Measure at each setting shown in the table below according to steps 8 to 12. MS2670A MS2670A MG3633A AM 90% of specification modulation frequency min / max Setting SWP TIME SWP TIME 20 msec 1 kHz 15.3 msec / 20.7 msec 200 msec...
  • Page 143 Perform test procedure steps 1 to 8 on the preceding paragraph ( a ). However, set MODULATION FREQ of the MG3633A to 100 Hz. Set the MS2661N display mode to Time. Set Time Span to 20 msec. Perform steps 8 to 13 of the test procedure on the preceding paragraph ( a ).

  • Page 144: Tracking Generator Output Level Flatness

    The output level of the Tracking Generator can be easily tested by inputting the TG output signal to the RF Input connector of the MS2661N. Here, an accurate method to test the TG output level by using a power meter, is described below.
  • Page 145 Set the TG output level to 0 dBm, and ON. Measure the TG output level with the power meter. Changing the Center Freq of the MS2661N as shown in the table on the next page, repeat the steps 3 to 5 above.
  • Page 146 SECTION 6 PERFORMANCE TESTS TG Output Level Flatness Test Output level Frequency(Hz) (dBm) 100k 100M 1.8G Error (reference) 6-42...

  • Page 147: Service

    SECTION 6 PERFORMANCE TESTS Service If the MS2661N is damaged or does not operate as specified, contact your nearest Anritsu dealer or business office for repair. When you request repair, provide the following information. (a) Model name and serial number on rear panel...
  • Page 148 SECTION 6 PERFORMANCE TESTS 6-44 .
  • Page 149 SECTION 7 STORAGE AND TRANSPORTATION SECTION 7 STORAGE AND TRANSPORTATION This section describes the long-term storage, repacking and transportation of the MS2661N as well as the regular care procedures and the timing. TABLE OF CONTENTS Cleaning Cabinet ..........................Storage Precautions ..........................
  • Page 150 SECTION 7 STORAGE AND TRANSPORTATION (Blank)

  • Page 151: Storage And Transportation

    SECTION 7 STORAGE AND TRANSPORTATION Cleaning Cabinet Always turn the MS2661N POWER switch OFF and disconnect the power plug from the ac power inlet before cleaning the cabinet. To clean the external cabinet: • Use a soft, dry cloth for wiping off.

  • Page 152: Storage Precautions

    SECTION 7 STORAGE AND TRANSPORTATION Storage Precautions This paragraph describes the precautions to take for long-term storage of the MS2661N SPECTRUM ANALYZER. Precautions before storage (1) Before storage, wipe dust, finger-marks, and other dirt off the MS2661N. (2) Avoid storing the MS2661N where: 1) It may be exposed to direct sunlight or high dust levels.

  • Page 153: Repacking And Transportation

    SECTION 7 STORAGE AND TRANSPORTATION Repacking and Transportation The following precautions should be taken if the MS2661N must be returned to Anritsu Corporation for servicing. Repacking Use the original packing materials. If the MS2661N is packed in other materials, observe the following packing procedure: (1) When repacking, remove all the cables, and unplug the memory card from the slot.
  • Page 154 SECTION 7 STORAGE AND TRANSPORTATION (Blank)
  • Page 155 APPENDIXES APPENDIXES TABLE OF CONTENTS APPENDIX A FRONT AND REAR PANEL LAYOUT ................. APPENDIX B BLOCK DIAGRAM ......................App-i...
  • Page 156 APPENDIXES (Blank) App-ii...

  • Page 157: Appendix A Front And Rear Panel Layout

    APPENDIX A APPENDIX A FRONT AND REAR PANEL LAYOUT This appendix shows the front and rear panel layouts.
  • Page 158 APPENDIX A (Blank)

  • Page 163: Appendix Bblock Diagram

    APPENDIX B APPENDIX B BLOCK DIAGRAM This appendix shows the Block Diagram of the MS2661N.
  • Page 164 APPENDIX B (Blank)