Anritsu MS2650, MS2660B, MS2660C Operation Manual

MS2650/MS2660B/C Series

Spectrum Analyzer

Operation Manual

Vol. 2

(Detailed Operating Instructions

10th Edition

•

For safety and warning information, please read this

manual before attempting to use the equipment.

•

Additional safety and warning information is

provided within the MS2650/MS2660B/C Series Spectrum Analyzer Operation Manual Vol. 1 (Basic Operating Instructions). Please also refer to this document before using the equipment.

•

Keep this manual with the equipment.

)

ANRITSU CORPORATION

Document No.: M-W1251AE-10.0

Safety Symbols

To prevent the risk of personal injury or loss related to equipment malfunction, Anritsu Corporation uses the

following safety symbols to indicate safety-related information. Ensure that you clearly understand the meanings

of the symbols BEFORE using the equipment. Some or all of the following symbols may be used on all Anritsu

equipment. In addition, there may be other labels attached to products that are not shown in the diagrams in this

manual.

Symbols used in manual

DANGER

WARNING

CAUTION

This indicates a very dangerous procedure that could result in serious injury or death if not performed properly.

This indicates a hazardous procedure that could result in serious injury or death if not performed properly.

This indicates a hazardous procedure or danger that could result in light-to-severe injury, or loss related to equipment malfunction, if proper precautions are not taken.

Safety Symbols Used on Equipment and in Manual

The following safety symbols are used inside or on the equipment near operation locations to provide information

about safety items and operation precautions. Ensure that you clearly understand the meanings of the symbols

and take the necessary precautions BEFORE using the equipment.

This indicates an obligatory safety precaution. The obligatory operation is

This indicates a warning or caution. The contents are indicated symbolically in or

This indicates a note. The contents are described in the box.

These indicate that the marked part should be recycled.

This indicates a prohibited operation. The prohibited operation is indicated symbolically in or near the barred circle.

indicated symbolically in or near the circle.

near the triangle.

MS2650/MS2660B/C Series Spectrum Analyzer Operation Manual Vol. 2 (Detailed Operating Instructions)

14 March 1997 (First Edition) 7 March 2008 (10th Edition)

Copyright © 1997-2008, ANRITSU CORPORATION. All rights reserved. No part of this manual may be reproduced without the prior written permission of the publisher. The contents of this manual may be changed without prior notice. Printed in Japan

Equipment Certificate

Anritsu Corporation certifies that this equipment was tested before shipment using calibrated measuring instruments with direct traceability to public testing organizations recognized by national research laboratories, including the National Institute of Advanced Industrial Science and Technology, and the National Institute of Information and Communications Technology, and was found to meet the published specifications.

Anritsu Warranty

Anritsu Corporation will repair this equipment free-of-charge if a malfunction occurs within one year after shipment due to a manufacturing fault, under the condition that this warranty is void when:

The fault is outside the scope of the warranty conditions described in

•

the operation manual.

The fault is due to mishandling, misuse, or unauthorized modification

•

or repair of the equipment by the customer.

The fault is due to severe usage clearly exceeding normal usage.

•

The fault is due to improper or insufficient maintenance by the

•

customer.

The fault is due to natural disaster including fire, flooding,

•

earthquake, etc.

The fault is due to use of non-specified peripheral equipment,

•

peripheral parts, consumables, etc.

The fault is due to use of a non-specified power supply or in a

•

non-specified installation location.

In addition, this warranty is valid only for the original equipment purchaser. It is not transferable if the equipment is resold.

Anritsu Corporation shall assume no liability for injury or financial loss of the customer due to the use of or a failure to be able to use this equipment.

Anritsu Corporation Contact

In the event that this equipment malfunctions, contact an Anritsu Service and Sales office. Contact information can be found on the last page of the printed version of this manual, and is available in a separate file on the CD version.

iii

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 you

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 need

to be broken/shredded so as not to be unlawfully used for military purpose.

Disposal Procedure

The product that you have purchased contains a rechargeable battery.

The battery is recyclable. At the end of its useful life, under various

state and local laws, it may be illegal to dispose of this battery into the

municipal waste stream. Check with your local solid waste officials fo

details in your area for recycling options or proper disposal.

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.

In the power-on state, if the power plug is removed from the outlet, then reinserted into it, the power will not be turned on. Also, if the lines is disconnected due to momentary power supply interruption or power failure, the power will not be turned on (enters the standby state) even if the line is recovered.

This is because this equipment enters the standby state and prevents incorrect data from being acquired when the line has to be disconnected and reconnected.

For example, if the sweep time is 1,000 seconds and data acquisition requires a long time, momentary power supply interruption (power failure) might occur during measurement and the line could be recovered automatically to power-on. In such a case, the equipment may mistake incorrect data for correct data without recognizing the momentary power supply interruption.

If this equipment enters the standby state due to momentary power supply interruption or power failure, check the state of the measuring system and press the front power switch to restore power to this equipment.

Further, if this equipment is built into a system and the system power has to be disconnected then reconnected, the power for this equipment must also be restored by pressing the front power switch.

Consequently, if this equipment is built into remote monitoring systems that use MODEMs, the standby function of this equipment must be modified.

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 measurement 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. To resolve this problem, this instrument usually operates in positive peak detection mode and normal detection mode. In the positive peak detection mode, the highest level within the frequency range between the sample points can be held and traced. In the normal detection mode, both the positive peak and the negative peak can be traced. Positive peak detection mode should be used for almost all measurements including normal signal level measurement, pulsed noise analysis, and others. It is impossible to measure the signal level accurately in sample detection mode or in negative peak detection mode. Use of sample detection mode is restricted to random noise measurement, occupied frequency bandwidth measurement for analog communication systems, and adjacent-channel leakage power measurement, etc.

Measurement Item

• Normal signal.................................................................................................. POS PEAK

• Random noise.................................................................................................. SAMPLE

• Pulsed noise..................................................................................................... NORMAL (POSI-NEG)

• Occupied frequency bandwidth, adjacent-channel leakage power.......... SAMPLE

(for analog communication systems)

• Occupied frequency bandwidth, adjacent-channel leakage power.......... POS PEAK or SAMPLE

(for digital communication systems)

When a detection mode is specified as one of the measurement methods, make the measurement in the specified detection mode.

ABOUT THIS MANUAL

(1) Composition of MS2650/MS2660B/C series spectrum analyzer Operation Manuals

The MS2650/MS2660B/C 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

Detailed operating instruction part

Composition

Operation Manuals

Vol. 2

Programming part

Vol. 3

(Remote control part)

(PTA control part)

Basic operating instruction part: Basic Operating Instructions: Provides information on the MS2650/

MS2660B/C series outline, preparation before use, panel description,

basic operation, soft-key menu and performance tests.

Detailed operating instruction part: Detailed Operating Instructions: Provides information on the detailed

panel operating instructions on the spectrum analyzer that expand

on the basic operation and soft-key menu in the Basic Operating

Instruction Part.

Programming part: Composed of the Remote Control Part and PTA Control Part. The

Remote Control Part provides information on RS-232C remote

control GPIB remote control and sample programs, while the PTA

Control Part describes about PTA operation and PTL commands.

For Safety ................................................................................................................. iii

ABOUT THIS MANUAL.................................................................................................... I

SECTION 1 BASIC OPERATION PROCEDURE ........................................................ 1-1

Signal Display .............................................................................................................................. 1-3

Marker Operation ......................................................................................................................... 1-6

"Measure" Function Check .......................................................................................................... 1-8

Screen Hard Copy ........................................................................................................................ 1-9

SECTION 2 FREQUENCY/AMPLITUDE DATA ENTRY .......................................... 2-1

Setting Observation Frequency .................................................................................................... 2-3

Setting Level Range ..................................................................................................................... 2-8

Offsetting Reference Level ........................................................................................................ 2-13

SECTION 3 MARKER FUNCTIONS ......................................................................... 3-1

Changing Zone Marker Position and Width ................................................................................ 3-4

Marker Mode ............................................................................................................................... 3-7

Display Line ............................................................................................................................... 3-10

Multimarker ............................................................................................................................... 3-11

Marker Search ............................................................................................................................ 3-16

Setting Parameters Using Marker Values .................................................................................. 3-22

SECTION 4 SIGNAL SEARCH FUNCTION ............................................................. 4-1

Detecting Peaks ............................................................................................................................ 4-3

Moving the Measurement Point ................................................................................................... 4-5

SECTION 5 SELECTING THE DISPLAY METHOD ................................................. 5-1

Display Mode ............................................................................................................................... 5-3

Storage Mode ............................................................................................................................. 5-15

Detection Mode .......................................................................................................................... 5-22

Time Domain ............................................................................................................................. 5-26

SECTION 6 SELECTING THE SWEEP METHOD ................................................... 6-1

Sweep Mode ................................................................................................................................ 6-3

Trigger Mode ............................................................................................................................... 6-5

Zone Sweep and Signal Tracking .............................................................................................. 6-12

Time Gate Function ................................................................................................................... 6-14

Domain Sweep ........................................................................................................................... 6-22

SECTION 7 COUPLED FUNCTION ......................................................................... 7-1

From Auto to Manual Operation ................................................................................................. 7-4

SECTION 8 AUTOMATIC CALIBRATION AND

LEVEL CORRECTION FUNCTIONS .................................................... 8-1

Automatic Calibration Function CAL ........................................................................................ 8-3

Preselector tuning ........................................................................................................................ 8-6

Measurement System Level Correction ....................................................................................... 8-8

SECTION 9 SYSTEM SETTING AND PRESET FUNCTION ................................... 9-1

Coupled Function Common/Independent Setting Mode ............................................................. 9-4

SECTION 10 SAVE/RECALL FUNCTION ................................................................ 10-1

Internal Register ......................................................................................................................... 10-4

Memory Card File Management .............................................................................................. 10-11

SECTION 11 COPY/SOUND MONITOR/TV IMAGE MONITOR .............................. 11-1

Direct Plotting ............................................................................................................................ 11-3

Saving Screen Image Data to Memory Card ............................................................................. 11-9

III

Displaying a Title ..................................................................................................................... 11-11

SOUND Monitor ...................................................................................................................... 11-12

TV Image Monitor ................................................................................................................... 11-14

SECTION 12 PTA/DEFINE FUNCTIONS ................................................................. 12-1

PTA Program Editing and Loading ........................................................................................... 12-3

User-Definition Function ........................................................................................................... 12-6

SECTION 13 MEASUREMENT ................................................................................ 13-1

Measure Measurement Function ................................................................................................ 13-3

Measurement Examples ............................................................................................................. 13-8

SECTION 14 TRACKING GENERATOR .................................................................. 14-1

Tracking Generator Menus ........................................................................................................ 14-3

Normalize/Instant-Normalize Functions .................................................................................... 14-4

Transmission Characteristics Measurement .............................................................................. 14-6

Reflection Characteristics Measurement ................................................................................. 14-13

Notes on Active Device Measurement .................................................................................... 14-17

SECTION 15 EMC, Measurement of Field Strength ................................................. 15-1

Menu of EMC ............................................................................................................................ 15-3

Field Strength Measurement ...................................................................................................... 15-4

User Antenna Factor Setting, Save/Load to /from a Memory Card .......................................... 15-7

Caution: When Performing Field Strength Automatic Measurement ..................................... 15-13

EMC Measurement .................................................................................................................. 15-15

APPENDIX A SOFT-KEY MENU ............................................................................... A-1

Soft-key Menu List ..................................................................................................................... A-4

Menu Tree ................................................................................................................................... A-6

APPENDIX B KEYWORDS INDEX........................................................................... B-1

SECTION 1 BASIC OPERATION PROCEDURE

SECTION 1

BASIC OPERATION PROCEDURE

TABLE OF CONTENTS

Signal Display

Turn the power on

Execute automatic calibration

Set the signal to the center of the screen

Enlarge and display the signal

Marker Operation

Check of the zone marker function

The "marker → CF" function check

"Measure" Function Check

Screen Hard Copy

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1-3

1-4

1-5

1-6

1-8

1-9

1-1

SECTION 1 BASIC OPERATION PROCEDURE

1-2

SECTION 1 BASIC OPERATION PROCEDURE

The basic operation procedure of this equipment is

explained here. The operations are listed on the right.

Also, the explanation will advance assuming that a

500 MHz signal is applied to the input connector.

Please read this manual while operating this

equipment.

( : Panel key, : Soft key)

Signal Display

Turn the power on

Press the standby button on the rear panel, then

press the power switch (0) on the front panel. In

this case, continue pressing the power switch for

one second or more.

(I) Signal display

1) Turn the power on,

2) execute automatic calibration,

3) set the signal to the center of the screen, and

4) enlarge and display the signal.

(II) Marker operation

Check of the zone marker function.

The "marker → CF" function check.

(III) "Measure" function check

(IV) Screen hard copy

Press Preset key.

Press Preset All key in the menu.

Fig. 1-1

The power is turned on/off only when the power

switch is pressed for one second or more. This

prevents the power from being turned on/off easily

by mistake.

When panel key (hard key) is pressed, the related

soft key menu is displayed.

Partial resettings are enabled. This resetting

includes only the display-related resetting or the

resetting of special modes such as zone sweep.

1-3

SECTION 1 BASIC OPERATION PROCEDURE

Execute automatic calibration

Wait after switching on the power supply of the

machine (warm up period) till the internal temperature

becomes stable. This period is approximately 10

minutes.

After warm up, execute automatic calibration.

CAL

Press Shift key then 0 key.

Select All Cal from the menu displayed on the display.

Fig. 1-2

Set the signal to the center of the screen

Automatic Calibration is carried out by using an

internal source without need for any external cable

connection.

See "Detailed Operation Instructions" for detail

information about contents of calibration.

1-4

Press Frequency key.

Fig. 1-3

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.

This reduces key operation times.

This display section is called Entry area. Selecting

the menu displays the current set value of the

parameter. The set value can be changed by

entering data in Entry area.

Press Menu On/Off key

Fig. 1-4

Press Menu On/Off key to return to previous screen.

Use the ten-key pad (numeric keys) to enter 500 MHz.

SECTION 1 BASIC OPERATION PROCEDURE

The display of the soft key menu can be switched

on/off using Menu On/Off key. When the menu

disappears, the scale is enlarged. Also, when the

menu is displayed, the scale is reduced.

Fig. 1-5

Enlarge and display the signal

Press Span key , then press the V down key several times to enlarge the signal display.

The following three methods to input numeric

values to parameters are provided: direct input by

the ten-key pad (numeric keys), up/down keys,

and rotary knob.

Fig. 1-6

1-5

SECTION 1 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. 1-7

To check Marker→ CF function, shift the signal from the center intentionally.

Press Frequency key and More key in order, and then Scroll → key two times.

The soft key menu marked by an asterisk on the

upper right indicates that the menu can further be

opened by pressing the key. Adversely, the soft

key menu not marked indicates that the menu

cannot be opened any more, so to speak, the end

of menu opening.

The following items can easily be checked by the

soft key menu tab: How many pages of the soft

key menu being displayed currently are there?,

Fig. 1-8

and what page is displayed now?

To turn over the page, press More key.

1-6

Press Peak Search key.

Fig. 1-9

The marker fetches the signal.

Press More to open 2nd page, and press Marker →

key.

SECTION 1 BASIC OPERATION PROCEDURE

*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. Besides, the Freq/Ampl and Marker-related

keys do not turn over the page by repeatedly

pressing the panel key. For these keys, because

the first page is important specially, it should always

be displayed when the panel key is pressed.

When the soft key menu is pressed, a menu of

function related to the menu is further displayed.

In this case, as shown in the figure on the left, the

thick line (the line on the preceding page) is

displayed at the left of the soft key menu. This

indicates that a new menu is overlapped with the

preceding page.

Fig. 1-10

Press marker → CF key.

The page opened by pressing the soft key can

return to the preceding page by the Return key.

Besides, it can be checked that which soft key

menu was pressed previously to open the current

menu, as the menu title is displayed on the upper

row of the soft key.

Fig. 1-11

Here, return to the screen of Fig. 1-8 and ensure that the screen changes to that of Fig. 1-11 only by pressing

the → CF key.

1-7

SECTION 1 BASIC OPERATION PROCEDURE

"Measure" Function Check

Press Preset key and Preset All key in order.

Press Peak Search key.

If the zero beat signal level (local feed through) is larger than the signal level and the marker fetches the zero

beat level, press "Next peak" key and put the marker on the signal.

Fig. 1-12

Press the Measure key and Frequency Count key to set the function of high accuracy frequency measurement

of the marker points.

Then, press the Count On key and start measurement.

Fig. 1-13

The frequency of marker points is displayed at the top left of the screen.

Incidentally, the internal counter correctly operates even at the full span condition, so an operation to reduce

frequency span otherwise required is not necessary in this model.

The soft-key menu display can be switched On/

Off by the Menu On/Off key.

However, keys that condition setting is not

possible unless a menu is On unconditionally

make the soft-key menu display On when pressing

a panel key.

From the screen after executing measurement, press

another panel key and change parameters, and then,

pressing again the Measure key will automatically

return to the menu of this screen and not to page 1

of the menu (page learning function).

It is a useful function when repeating measurement.

1-8

Screen Hard Copy

The screen can be hard-copied with the VP-600 printer (Epson) via an RS232C interface, and the procedures

are described below:

1) As illustrated below, connect the RS-232C connector and printer with an attached RS-232C cable.

2) Press the Copy key, and the currently displayed screen is hard-copied.

If the printed copy is improper, check if the RS-232C interface is correctly set in the following sequence.

3) Press the Shift key and then the Interface key.

4) Press the Connect to Controller key several times to get None on the display, and press the Connect to

Prt/Plt key several times and get RS-232C on the display.

Now the printer can be operated with RS-232C.

5) Press the RS232C Setup key and set so that (or check if) the setting of RS-232C interface is the same

between the main body and printer.

(For the setting/checking of the RS-232C interface on the printer side, refer to the instruction manual of

the printer.)

SECTION 1 BASIC OPERATION PROCEDURE

6) Press the Shift key and then the Copy Cont key.

7) Press the Printer/Plotter key and select Printer.

8) Press the Printer Setup key, and then press the VP-600 key.

9) Press the Magnify key several times and make the display 1×1.

10) Press the Copy key, and the currently displayed screen is hard-copied.

Rear panel

OPT01

OPT15

Phone

IF Out(455kHz/10.695MHz)

OPT07

Composite Out

10MHz STD

Ref In Buff Out

0dBm > 2Vp-p

OPT06

Trig/Gate In

(± 10V)

Sweep Status(Z)Video(Y)Sweep(X)

7.5Ω

Buff Out

OPT15

TTL0-0.5V0-10V

Freq Adj.

WARNING

CAUTION

Line Input 320VA Max

50/60/400Hz 100−120V 5A 200−240V 5A

RS−232C

Off

RS-232C cable

Printer

Fig. 1-14

1-9

SECTION 1 BASIC OPERATION PROCEDURE

1-10

SECTION 2 FREQUENCY/AMPLITUDE DATA ENTRY

SECTION 2

FREQUENCY/AMPLITUDE DATA ENTRY

This section describes the data entry function related to frequency and amplitude in the Freq/Ampl section on the front panel.

TABLE OF CONTENTS

Setting Observation Frequency

Center-Span Mode

Start-Stop Mode

Setting Step Size with Step Keys

Setting Frequency Scroll Step Size

Fixing the frequency bands

Setting Full Scan

Setting Zero Span

Setting Level Range

Setting Log/Linear Scale

Selecting Reference Level Units

Setting Reference Level

Setting Reference Level Step Size

Offsetting Reference Level

Setting Attenuator

Preamp Setting

Setting 50 Ω→75 Ω Impedance Transformer

Setting Level Frequency Correction Coefficient

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2-3

2-4

2-5

2-6

2-7

2-8

2-9

2-10

2-11

2-12

2-13

2-14

2-16

2-17

2-1

SECTION 2 FREQUENCY/AMPLITUDE DATA ENTRY

2-2

SECTION 2 FREQUENCY/AMPLITUDE DATA ENTRY

Trig/Gate

MS2661B

Spectrum Analyzer 9kHz–3GHz

RF Input 50Ω

+30dBm

±50V DC Max

+30dBm(PRE AMP On)

Local

Remote

Stby

Preset

Multi Mkr

Marker

Frequency

Span

Amplitude

Continuous

Single

Save

Recall

Measure

A/B,A/BG

A,B

A/Time

Time

TV Monitor

CF RLV

Peak

User

Marker

TG Output 50Ω

9kHz–3GHz

RVS PWR

+20dBm

0V DC Max

EntryMarkerFreq/Ampl

dBm dB

V sec

mV msec

µV µsec

Cal

– / +

8 9 GHz7

PTA

EMC

HoldDefine

EnterInterface Mem Card

2 3 kHz1

Sound System Title

5 6 MHz4

Copy

Copy Cont

Shift

Peak

Menu On/Off

F 1

F 2

F 3

F 4

F 5

F 6

RBW VBW Sweep Time Atten

Display

Coupled Finction

Memory Card

SECTION 2 FREQUENCY/AMPLITUDE DATA ENTRY

Setting Observation Frequency

The observation frequency of the spectrum analyzer is set in the following two modes:

• Center-Span

• Start-Stop

The frequency setting upper and lower limits are For the MS2651B/2661B/2661C, 0 to 3 GHz

For the MS2653B/2663B/2663C, 0 to 8.1 GHz, respectively.

The Frequency key is used as the header key for setting the frequency, and the Span key is used

as the header key for setting the frequency span.

Frequency

Span

2-3

SECTION 2 FREQUENCY/AMPLITUDE DATA ENTRY

Center-Span Mode

(1) Setting center frequency

Frequency

(2) Setting frequency span

Span

TEN KEY

Key

キー

(1/2/5 sequence)

Key

(Use the CF Step Size key to set the step size.)

2-4

Note: When frequency span is 200 kHz or less, warming up might be necessary until the observation

frequency becomes stable after turning on the power.

When "Warm Up" message is being indicated at the top right corner of the indicator, please wait

for approximately 3 minutes, and start the measurements after the message disappears.

Start-Stop Mode

(1) Start frequency

SECTION 2 FREQUENCY/AMPLITUDE DATA ENTRY

Frequency

(2) Stop frequency

Frequency

Notes: • Because the and keys are the step keys for the center frequency, the start and stop

Start Freq

Stop Freq

TEN KEY

frequencies are also changed.

• The stop frequency may also vary depending on the values of the frequency span setting resolution

and start frequency.

2-5

SECTION 2 FREQUENCY/AMPLITUDE DATA ENTRY

Setting Step Size with Step Keys

To use the keys to change the step size of the center frequency, register the step size as follows:

Frequency CF Step Size

Setting Frequency Scroll Step Size

Frequency

Scroll Step Size

Copy Cont

Stby

Spectrum Analyzer

MS2661B

Preset

Remote

Local

Copy

9kHz–3GHz

Memory Card

TEN KEY

Menu On/Off

TG Output 50Ω

9kHz–3GHz

F 1

F 2

F 3

F 4

F 5

F 6

Frequency

Span

Amplitude

Peak

CF RLV

Save

Recall

Measure

Display

A/B,A/BG

A/Time

A,B

Time

Coupled Finction

RBW VBW Sweep Time Atten

RVS PWR

+20dBm

0V DC Max

1 div

2 div

EntryMarkerFreq/Ampl

PTA

8 9 GHz7

EMC

5 6 MHz4

Sound System Title

2 3 kHz1

Cal 0

HoldDefine

EnterInterface Mem Card

– / +

RF Input 50Ω

+30dBm

±50V DC Max

+30dBm(PRE AMP On)

Shift

dBm dB

V sec

mV msec

µV µsec

Multi Mkr

Marker

Peak Search

Continuous

Single

TV Monitor

Trig/Gate

User

Select a step size. The selected

scroll step size is highlighted. 5 div

10 div

2-6

2 div

Tr-A

return

Span

Return to the top menu.

Scroll→

The waveform scrolls 2 divs to the right.

Span

←Scroll

The waveform scrolls 2 divs to the left.

Fixing the frequency bands

This function is an MS2653B/2663B/2663C dedicated function. It cannot be used in the MS2651B/2661B/

2661C.

In the MS2653B/2663B/2663C, the 0 to 8.1 GHz frequency range consists of the following three bands:

• Band 0 .................. .0 to 3.2 GHz

• Band 1-................ 2.92 to 6.5 GHz

• Band 1+............... 6.4 to 8.1 GHz

In the initial state, the Auto Band mode that is operated by selecting the optional frequency band is selected

according to the range of frequencies to be observed.

SECTION 2 FREQUENCY/AMPLITUDE DATA ENTRY

Frequency band configuration

Frequency range to be observed

0 2.92 3.2 6.4 6.5 8.1

Band 0 Band 1

Band 1

(GHz)

Selection of frequency bands according to range of frequencies to be observed in Auto Band mode

Perform the following to set the frequency bands, for example, when the frequency bands are switched:

Span

Band

Auto Band

Manual Band 0

Manual Band 1

Select any of these buttons.

return

2-7

SECTION 2 FREQUENCY/AMPLITUDE DATA ENTRY

Setting Full Scan

In the normal operating state, pressing

analyzer to be swept over the full span. However, this setting also initializes the parameters except the frequency

range.

To set the full span and leave the other parameters unchanged, perform the following key operations.

Span

For the MS2651B/2661B/2661C, 0 to 3 GHz

For the MS2653B/2663B/2663C Auto band, 0 to 8.1 GHz

For Band 0, 0 to 3.2 GHz

For Band 1-, 2.92 to 6.5 GHz

For Band 1+, 6.4 to 8.1 GHz

Setting Zero Span

The Spectrum Analyzer can operate as a selective level meter in which the horizontal axis is graduated as a

time axis by setting the frequency span to 0 Hz. The rising and falling edges of burst waves can also be

observed and measured.

Preset

the key allows the entire frequency range of the spectrum

Full Span

2-8

Performing any of the following key operations allows the spectrum analyzer to operate in the zero panel (time

domain) mode.

Time

Span

Zero Span

•

For further details on the zero span (time domain) mode, see SECTION 5, "SELECTING THE DISPLAY

METHOD."

In the frequency and time domains, the RBW, VBW, Sweep time and other coupling functions time can be set

to different values. For further details, see SECTION 9, "SYSTEM SETTING AND PRESET FUNCTION."

Setting Level Range

The table below shows the types of level display modes and the ranges of the reference level (top graticule of

the amplitude scale) for the different modes. When a preamp (Option) is used, the entire reference level range

is shifted 20 dB.

SECTION 2 FREQUENCY/AMPLITUDE DATA ENTRY

50 Ω (standard) 75 Ω (with Opt.22)

MS2651B/2661B/2661C only

Reference Level rangeUnitsDisplay mode

–100 to +25 dBm

+8.8 to +133.8 dBµV

–51.2 to 73.8 dBmV

2.74 µV to 4.87 V

+14.8 to +139.8 dBµV

100 fW to 316 mW

– – – – – –

274 µV to 4.87 V

Log scale

Linear scale

dBm

dBµV

dBmV

dBµV (emf)

dBµV/m

–100 to +30 dBm

+7 to +137 dBµV

–53 to 77 dBmV

2.24 µV to 7.07 V

+13 to +143 dBµV

100 fW to 1.0 W

– – – – – –

224 µV to 7.07 V

dBm: dBm unit system where 1 mW/50 Ω or 75 Ω is defined as 0 dBm.

dBµV: dBµV unit system where 1µV is defined as 0 dBµV, and the terminal voltage display is

terminated into 50 Ω or 75 Ω.

dBmV: dBmV unit system where 1 mV is defined as 0 dBmV, and the terminal voltage display is

terminated into 50 Ω or 75 Ω.

dBµV (emf): dBµV (emf) unit system based on the open-voltage display, and dBµV +6 dB is fed as the

output value.

The Amplitude key is used as the header key for setting the amplitude level.

Amplitude

Preset

Remote

Local

Copy Cont

Copy

Stby

Spectrum Analyzer

MS2661B

9kHz–3GHz

Memory Card

Menu On/Off

TG Output 50Ω

9kHz–3GHz

F 1

F 2

F 3

F 4

F 5

F 6

Frequency

Span

Amplitude

Peak

CF RLV

Save

Recall

Measure

Display

A/B,A/BG

A/Time

A,B

Time

Coupled Finction

RBW VBW Sweep Time Atten

RVS PWR +20dBm

0V DC Max

Multi Mkr

Marker

Peak Search

Continuous

Single

TV Monitor

Trig/Gate

User

PTA

8 9 GHz7

EMC

5 6 MHz4

Sound System Title

2 3 kHz1

Cal 0

EntryMarkerFreq/Ampl

HoldDefine

EnterInterface Mem Card

– / +

RF Input 50Ω

+30dBm

±50V DC Max

+30dBm(PRE AMP On)

Shift

dBm dB

V sec

mV msec

µV µsec

2-9

SECTION 2 FREQUENCY/AMPLITUDE DATA ENTRY

Setting Log/Linear Scale

To set the amplitude scale to log scale or linear scale, perform the following key operations.

(1) Setting log scale

Amplitude

(2) Setting linear scale

Amplitude

Log Scale 10 dB/div

The log scale is set when

this key is pressed.

Linear Scale 10%/div

The linear scale is set when

this key is pressed.

← Select one of the scales. 5 dB/div

2 dB/div

1 dB/div

Return

← Select one of the scales. 5%/div

2%/div

1%/div

Return

2-10

The reference level remains constant, independent of switching between log and linear scales.

When the reference level is set to less than –60 dBm in the log scale mode, the reference level of the linear

scale is switched to 224 µV/50 Ω or 274 µV/75 Ω.

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