Anritsu MS2668C Data Sheet

MS2668C

Spectrum Analyzer

9 kHz to 40 GHz

For Microwave and
Millimeter wave
Measurements

2

In recent wireless communication market, the utilization of microwave/millimeter wave band
frequencies is being considered in order to realize high-speed and large-capacity data
communication. In the markets of ITS and ultrahigh-speed wireless LAN, aiming for the
speedup of wireless LAN which began to be spread as a typical application, millimeter wave
band is used for realizing collision avoidance radar.
MS2668C is a portable and high-performance spectrum analyzer that has various radio
evaluation functions for microwave/millimeter wave devices and systems.

MS2668C

Spectrum Analyzer

3

■ Compact and lightweight

(15 O in standard configuration)

●Easy portability for installation and maintenance

■ High C/N and superior distortion

characteristics

●High-stability crystal oscillator as standard

■ Easy-to-use, simple operation

●Built-in “Measure” function for evaluation of radio

equipment (frequency counter, C/N, channel power, adjacent
channel power, occupied frequency bandwidth, burst average
power and template pass/fail function)

●User-defined function

●Zone marker/zone sweep

●Two-screen display

●FM demodulation waveform display

●Memory card interface (for saving/recalling trace data

and set up parameter and for saving screen image in
bitmap format)

■ Millimeter wave applications

●External mixer input/output as standard

●Up to 110 GHz with an external mixer

■ Options support wide range of applications

●Narrow resolution bandwidth (10 to 300 Hz)

●High-speed time domain sweep

●Trigger/gate circuit

●AM/FM demodulator (sound monitor)

●Centronics interface (cannot be installed with GPIB

simultaneously)

■ Easy to set up automatic measurements

●Controller function built-in (PTA)

4

Compact and Powerful

Synthesized local oscillator

The synthesized local oscillator design permits stable
measurements without disturbance due to frequency drift of
the spectrum analyzer itself. The level stabilizes in 30 minutes
after power-on, making this unit especially suitable for on-site
maintenance and adjustment where work must be completed
quickly.

Counter with 1 Hz resolution

A full complement of frequency counter functions are provided.
Resolution is as high as ±1 Hz even at full span, and high­speed frequency measurements can be performed. The high
sensitivity compared with ordinary counters makes it easy to
select one signal from many and to determine its frequency.

Excellent cost vs performance
and the superior average noise
level at 40 GHz

The superior basic performance, including noise sideband,
average noise level, and spurious response, provides excellent
cost vs performance. 10 Hz RBW (option 03) is provided.

Frequency measurement (1 Hz resolution)

≤–115 dBm (1 MHz to 1 GHz)
≤–115 dBm +1.5f [GHz] dB (1.0 to 3.1 GHz, band 0)
≤–114 dBm (3.1 to 8.1 GHz)
≤–113 dBm (8.0 to 14.3 GHz)
≤–105 dBm (14.1 to 26.5 GHz)
≤–101 dBm (26.2 to 40 GHz)

≤–95 dBc/Hz +20 log (n)

✽1 MHz to 40 GHz, 10 kHz offset,
n: local harmonic order

2nd harmonic distortion:

≤–60 dBc (10 to 200 MHz, mixer input: –30 dBm)
≤–70 dBc (0.2 to 1.55 GHz, mixer input: –30 dBm)
≤–90 dBc or noise level (1.55 to 20 GHz,

mixer input: –10 dBm)

Two signal 3rd intermodulation distortion:

≤–70 dBc (10 to 100 MHz)
≤–80 dBc (0.1 to 8.1 GHz)
≤–75 dBc or noise level (8.1 to 26.5 GHz)
≤–75 dBc or noise level (typical, 26.5 to 40 GHz)

✽Frequency difference of two signals: ≥50 kHz,
mixer input: –30 dBm

Average
noise level
(RBW:1 kHz)

Noise
sideband

Spurious
response

100 dB display dynamic range

For measurements requiring a wide dynamic range such as
adjacent channel power measurements, MS2668C can
display nearly 90 dB on a single screen.

Highly-accurate measurement

Automatic calibration ensures a high level accuracy. A span
accuracy of 5% and 501 sampling points ensure accurate
occupied frequency bandwidth and adjacent channel power
measurements.

Occupied bandwidth measurement

5

Burst average power measurement

Convenient, Easy-to-Use Functions

Simple operation

Users require ease of operation in a wide variety of contexts.
The front panel, key layout, and softkey menu were simplified
for ease-of-use. Also, “page-learning” and “user-defined”
functions have been added to minimize the steps required for
a given procedure.

Bright color screen

A 5.5 inch bright color TFT-LCD is used to custom configure
the display scales, measured waveform data, settings and
other parameters for easy viewing. Each color can be
changed independently. When the soft key display is turned
off, the scale area enlarges to 80 (H) ✕ 180 (W) mm,
comparable to an 8 inch CRT.

Radio equipment evaluation
functions(“measure” functions)

A full range of functions including measurement of power
levels, frequencies, adjacent channel power, and mask and
time template measurements are provided for performance
evaluation of radio equipment. Key operation is simple and
high-speed calculations make the measurement fast and
efficient.

Mask measurement

Channel power measurement

Adjacent channel power measurement

Time template measurement

6

Convenient Easy-to-Use Functions

FM-demodulated waveform
display function

This function displays FM-demodulated waveforms with an
accuracy of 5% over the range ±10 kHz to ±1 MHz. When
used with high-speed time domain sweep (Option 04) and
trigger/gate circuit (Option 06), frequency deviation of the
modulated signal, as well as frequency switching times of
radio equipment and VCOs, can be measured.

Spectrum and FM-demodulation waveform

Zone sweep and multi-zone
sweep functions

Sweeps can be limited to zones defined by zone markers
which results in reduced sweep time. This zone sweep
function can be combined with “measure” functions such as
“noise measure” which can directly read out the total noise
power within the zone, to reduce measurement time greatly.
The multi-zone sweep function enables up to ten zones to be
swept.

Multi-zone sweep

Zone markers and multimarkers

Zone markers can be set automatically at the peak signal
within a given marker range, enabling quick measurement.

By using the multimarker function, automatic measurements
can be performed for up to ten markers, with the results
displayed in a table. With the multimarker function, up to 10
harmonics of the carrier can be measured, as well as the 10
highest spurious levels within the frequency span. Also, up to
10 markers can be manually set for automatic frequency and
amplitude measurements.

Multi-marker (highest 10 points)

Multi-marker (harmonics measurement)

7

Multi-screen display

The Trace A and Trace B waveforms are superimposed on
the same screen, and two spectra with different frequencies
are displayed simultaneously. In addition, it is possible to
simultaneously display spectrum and time domain screens for
the same signal. The multi-screen display permits efficient
signal level adjustment and harmonic distortion measurement,
too. Furthermore, in addition to being able to display amplitude
in the time domain, it is also possible to display the FM
demodulation waveform.

Two traces with different frequencies

Spectrum and time domain measurement

User-defined functions

Measurement programs downloaded to the spectrum analyzers
from a personal computer or memory card can be executed
by defining menu keys. The measurement program is executed
simply by pressing the predefined key, with no further operation.
Other panel and function keys can also be predefined in the
same way.

Measurement programs
definition (downloaded from
personal computer)

Panel and function keys
definition

User-defined menu

Convenient Easy-to-Use Functions

8

Screen image bitmap saved to
memory card

Instead of printing a hard copy of the screen, it is also possible
to save the screen image to a memory card in bitmap format.
Editing the saved bitmap data using a PC, makes report
writing easy.

▼

When the mode to save the screen
image in bitmap format to the memory
card is selected as a copy method at
the hard copy function, just one press
of the copy key saves the screen
image as a bitmap format to the
memory card. And the file number
of each saved file is incremented
automatically.

▼

The screen image data can also be
saved to the memory card using the
save function. In this case, the file
number of the saved file can be
specified.

Convenient Easy-to-Use Functions

9

Versatile Options

To boost basic performance

Narrow resolution bandwidth (Option 02/03)

The frequency resolution is improved by adding an optional
narrow resolution bandwidth filter. Option 02 (30, 100, and
300 Hz) and 03 (10, 30, 100, 300 Hz) are provided. In Option
03, average noise level at RBW 10 Hz is specified.

For testing digital mobile
communication equipment

High-speed time domain sweep (Option 04)

Testing of TDMA-type radio equipment requires time domain
(zero-span) measurements of antenna power, transient
response characteristics of burst transmissions, transmission
timing, and other characteristics. The high-speed time domain
sweep option boosts a sweep time to 12.5 µs and resolution
to 0.025 µs. ∗This option must be used with the trigger/gate
circuit (Option 06).

Trigger/gate circuit (Option 06)

The trigger function provides stable measurements of burst
signals in the time domain. External, video, wide IF video, or
line trigger can be selected.
PASS/FAIL measurements are easily made on TDMA radio
burst signals using limit lines created in the template function.
Pre-trigger and post trigger delays can be used.
Burst signals can also be measured in the frequency domain
using the gate sweep function. A wide IF video trigger function
is used, eliminating the need for an external trigger source
that was previously required.

High-speed time-domain measurement (TS = 12.5 µs)

Wide IF video trigger function

Wide IF video trigger and gate functions

The enhanced performance and digital functions of recent radio equipment necessitate measuring equipment with even more
sophisticated functions and performance. Versatile options are available to meet such needs.

10

Easy-to-Use Key Layout

11

Function keys F1 to F6

Select on-screen menu items
Menu on/off keys turn menus on and off, and [more] key turns menu pages.

Save/recall

Saves and recalls measurement settings and measured waveforms
Data can be saved either to internal memory or to a memory card. (In internal memor y,
up to 12 data sets can be saved.)

Main Functions

Set frequency, span, amplitude and other parameters

Markers

Normal markers, multimarkers (maximum 10 numbers), zone markers and zone
sweeping are provided.

Entry keys

Input numeric values, units, and alphabetic characters

User keys

Register any panel and menu key functions, as well as application software functions to
user keys.

User define key

Define’s functions of user-defined keys
Up to 3-pages can be predefined.

Measure key

Executes various operations based on waveform data
High-speed measurements and computations are performed without the need for an
external personal computer.

Calibration

The built-in high-precision calibration signal source provides accurate measurements.

Trigger/gate

The trigger can be set in the time domain mode.

Coupled-function keys

Set parameters other than those set using main function keys
Normally set “Auto” for optimum values.

Display

Can be switched between frequency and time domains, and has two-screen display
modes.

Memory card slots

Support memory cards up to 2 Mbytes
Two type-1 memor y cards conforming to PCMCIA ver. 2.0 standards can be used
simultaneously.

RF connector

For input of signals at levels up to +30 dBm (maximum DC input: ±0 V)

14

13

12

11

10

9

8

7

6

5

4

3

2

1

12

Configuring Automated Measurement System

RS-232C interface (standard)

The RS-232C interface can be used to output hard copy data
to a printer or plotter and for remote control of the analyzer.
A notebook computer can be used for automated control and
data collection in the field. In addition, a modem can be used
for easy remote operation.

GPIB interface (standard)

In addition to remote control, the GPIB interface can also be
used to output data to a printer/plotter. (GPIB and Option 10
can not be installed simultaneously.)

Centronics interface (Option 10)

The Centronics interface is used to output data to a printer.
(GPIB and Option 10 can not be installed simultaneously.)

Memory card interface

(standard)

Memory cards are used to save and recall measurement
settings and waveform data, as well as to upload and download
PTA programs. Cards up to 2 Mbytes are supported (PCMCIA
ver. 2.0, type-I, 2-slots)

MS2668C

RS-232C, GPIB or Centronics

Personal computer

MS2668C

Plotter

Printer

Plotter

Personal computer

Personal computer

Centronics or GPIBRS-232C

ModemModem

RS-232C

GPIB RS-232C

Line

MS2668C

RS-232C

Printer

MS2668C

Plotter

Printer

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Configuring Automated Measurement System

Automated measurement
without external controller

The built-in microcomputer (PTA) functions which utilize the
spectrum analyzer as a controller, make an external controller
unnecessary. An automated measurement system including
control of other instruments is easily configured. The two
methods for loading programs are shown below.

Programs written on a computer are saved to a memory card.
The memory card is inserted into a memor y card slot in the
spectrum analyzer and the programs are loaded.

Programs written on a computer are
transferred to the spectrum analyzer
via the RS-232C or GPIB interface.

Personal computer

Personal computer

MS2668C

Memory card

RS-232C or GPIB

14

Specifications

Frequency range 9 kHz to 40 GHz

Band 0: 0 kHz to 3.2 GHz (n=1), Band 1–: 3.1 to 5.6 GHz (n=1), Band 1+: 5.4 to 8.1 GHz (n=1),
Band 1+: 8.0 to 14.3 GHz (n=2), Band 2–: 14.1 to 26.5 GHz (n=4), Band 3–: 26.2 to 40 GHz (n=6)

✽n: local harmonic order
Pre-selector range 3.1 to 40 GHz
Frequency setting
resolution

(1 × n) Hz ✽n: local harmonic order
Frequency display

accuracy

± (display frequency × reference frequency accuracy + span × span accuracy)
Marker frequency Normal marker: Same as display frequency accuracy

display accuracy Delta marker: Same as frequency span accuracy

Resolution: 1 Hz, 10 Hz, 100 Hz, 1 kHz

Accuracy: Display frequency × reference frequency accuracy ±1 LSD (at S/N: ≥20 dB)

Setting range: 0 Hz, (100 × n) Hz to 40.0 GHz ✽n: local harmonic order

Accuracy:±5%

Setting range:

1 kHz, 3 kHz, 10 kHz, 30 kHz, 100 kHz, 300 kHz, 1 MHz, 3 MHz (manually settable, or automatically settable
Resolution bandwidth according to frequency span)
(RBW) Option 02: 30 Hz, 100 Hz, and 300 Hz are added
(3 dB bandwidth) Option 03: 10, 30, 100, 300 Hz are added

Bandwidth accuracy: ±20% (1 kHz to 1 MHz), ±30% (3 MHz)
Selectivity (60 dB : 3 dB): ≤15:1

Video bandwidth (VBW) 1 Hz to 3 MHz (1-3 sequence), OFF ✽Manually settable, or automatically settable according to RBW

Noise sidebands: ≤ –95 dBc/Hz + 20 log n (1 MHz to 40 GHz, 10 kHz offset) ✽n: local harmonic order
Residual FM: ≤20 Hzp-p/0.1 s (1 GHz, span: 0 Hz)
Frequency drift: ≤200 × n Hz/min (span: ≤10 kHz, sweep time: ≤100 s)
✽After 1-hour warm-up at constant ambient temperature; n: local harmonic order
Frequency: 10 MHz
Start-up characteristics: ≤5 × 10

-8

/year (after 10 minutes warm-up, referenced to frequency after 24 hours warm-up)

Aging rate: ≤1 × 10

-7

/year, ≤1 × 10-8/day
Temperature characteristics: ±5 × 10-8(0° to 50°C, referenced to frequency at 25°C)
Measurement range: Average noise level to +30 dBm
Maximum input level: +30 dBm (CW average power, RF ATT: ≥10 dB), ±0 Vdc
Average noise level:

≤–115 dBm (1 MHz to 1 GHz), ≤–115 dBm +1.5f [GHz] dB (1 to 3.1 GHz), ≤–114 dBm (3.1 to 8.1 GHz),
≤–113 dBm (8.0 to 14.3 GHz), ≤–105 dBm (14.1 to 26.5 GHz), ≤–101 dBm (26.2 to 40 GHz)

✽RBW: 1 kHz, VBW: 1 Hz, RF ATT: 0 dB
Residual response: ≤–90 dBm (RF ATT: 0 dB, input: 50 Ω terminated, 1 MHz to 8.1 GHz)
Setting range

Log scale: –100 to +30 dBm, Linear scale: 224 µV to 7.07 V
Unit

Log scale: dBm, dBµV, dBmV, V, dBµVemf, W

Linear scale: V
Reference level accuracy:

±0.4 dB (–49.9 to 0 dBm), ±0.75 dB (–69.9 to –50 dBm, 0.1 to +30 dBm), ±1.5 dB (–80 to –70 dBm)

✽After calibration, at 100 MHz, span: 1 MHz (when RF ATT, RBW, VBW, and sweep time set to AUTO)
RBW switching uncertainty: ±0.3 dB (1 kHz to 1 MHz), ±0.4 dB (3 MHz) ✽After calibration, referenced to RBW: 3 kHz
Input attenuator (RF ATT)

Setting range: 0 to 70 dB (10 dB steps)

✽Manual settable, or automatically settable according to reference level

Switching uncertainty: ±0.3 dB (0 to 50 dB), ±1.0 dB (0 to 70 dB)

✽After calibration, frequency: 100 MHz, referenced to RF ATT: 10 dB

Frequency band

Frequency counter

Signal purity and stability

Frequency span

Reference oscillator

Level measurement

Reference level

Frequency

Except where noted otherwise, specified values were obtained after warming up the equipment for 30 minutes at a constant ambient temperature and then
performing calibration. The typical values are given for reference, and are not guaranteed.

15

Relative:

±1.5 dB (9.0 kHz to 3.2 GHz), ±1.0 dB (100 kHz to 3.2 GHz), ±1.5 dB (3.1 to 8.1 GHz), ±3.0 dB (8.0 to 14.3 GHz),

±4.0 dB (14.1 to 26.5 GHz), ±4.0 dB (26.2 to 40 GHz)

✽After pre-selector tuning at microwave band, referenced to midpoint between highest and lowest frequency deviation

in each band.

Absolute:

±5.0 dB (9 kHz to 40 GHz, RF ATT: 10 dB, referenced to 100 MHz) ✽After pre-selector tuning at microwave band
Scale (10 div.)

Log scale: 10, 5, 2, 1 dB/div

Linear scale: 10, 5, 2, 1%/div
Linearity (after calibration)

Log scale: ±0.4 dB (0 to –20 dB, RBW: ≤1 MHz), ±1.0 dB (0 to –70 dB, RBW: ≤100 kHz),

±1.5 dB (0 to –85 dB, RBW: ≤3 kHz), ±2.5 dB (0 to –90 dB, RBW: ≤3 kHz)

Linear scale: ±4% (compared to reference level)
Marker level resolution

Log scale: 0.01 dB, Linear scale: 0.02% of reference level
2nd harmonic distortion:

≤–60 dBc (10 to 200 MHz, mixer input: –30 dBm), ≤–70 dBc (0.2 to 1.55 GHz, mixer input: –30 dBm),

≤–90 dBc or noise level (1.55 to 20 GHz, mixer input: –10 dBm)

Two signal 3rd order intermodulation distortion:

Spurious response ≤–70 dBc (10 to 100 MHz), ≤–80 dBc (0.1 to 8.1 GHz), ≤–75 dBc or average noise level (8.1 to 26.5 GHz),

≤–75 dBc or average noise level (typical, 26.5 to 40 GHz) ✽Frequency difference of two signals:

≥50 kHz, mixer input: –30 dBm

Image response: ≤–65 dBc (≤18 GHz), ≤–60 dBc (≤22 GHz), ≤–55 dBc (≤40 GHz)
Multiple/out of band response: ≤–70 dBc(≤14 GHz), ≤–60 dBc (≤26 GHz), ≤–55 dBc (≤40 GHz)

1 dB gain compression ≥–5 dBm (≥100 MHz, at mixer input)
Sweep time

Setting range: 20 ms to 1000 s (manually settable, or automatically settable according to span, RBW, and VBW)
Accuracy: ±15% (20 ms to 100 s), ±25% (110 to 1000 s), ±1% (time domain sweep: digital zero span mode)

Sweep mode Continuous, single
Time domain sweep mode Analog zero span, digital zero span
Zero sweep Sweeps only in frequency range indicated by zone marker.
Tracking sweep Sweeps while tracing peak points within zone marker (zone sweep also possible).
Number of data points 501

NORMAL: Simultaneously displays max. and min. points between sample points.
POS PEAK: Displays max. point between sample points.

Detection mode NEG PEAK: Displays min. point between sample points.

SAMPLE: Displays momentary value at sample points.
Detection mode switching uncertainty: ±0.5 dB (at reference level)

Display Color TFT-LCD, Size: 5.5 inch, Number of colors: 17 (RGB, each 64-scale settable), Intensity adjustment: 5 steps settable

Trace A: Displays frequency spectrum.
Trace B: Displays frequency spectrum.
Trace Time: Displays time domain waveform at center frequency.
Trace A/B: Displays Trace A and Trace B simultaneously. Simultaneous sweep of same frequency, alternate sweep of

Display functions independent frequencies.

Trace A/BG: Displays frequency region to be observed (background) and object band (foreground) selected from

background with zone marker simultaneously.
Trace A/Time: Displays frequency spectrum, and time domain waveform at center frequency simultaneously.
Trace move/calculation: A → B, B → A, A ←→ B, A + B → A, A — B → A, A — B + DL → A

Storage functions NORMAL, VIEW, MAX HOLD, MIN HOLD, AVERAGE, CUMULATIVE, OVER WRITE

Demodulation range: 2, 5, 10, 20, 50, 100, 200 kHz/div
Marker display

FM demodulation Accuracy: ±5% of full scale (referenced to center frequency, DC-coupled, RBW: 3 MHz, VBW: 1 Hz, CW)
waveform display function Demodulation frequency response:

DC (50 Hz at AC-coupled) to 100 kHz (range: ≤20 kHz/div, VBW: off, at 3 dB bandwidth)

DC (50 Hz at AC-coupled) to 500 kHz (range: ≤50 kHz/div, VBW: off, at 3 dB bandwidth)

✽RBW: ≥1 kHz to 3 MHz usable

Input connector K-J, 50 Ω

Frequency response

Waveform display

AmplitudeSweep

Functions

Specifications

16

IF OUTPUT: –10 dBm (typical, 100 MHz, upper edge of scale, 50 Ω terminated), 10.69 MHz, BNC connector
VIDEO OUTPUT (Y): 0 to 0.5 V ± 0.1 V (typical, from lower edge to upper edge at 10 dB/div)

0 to 0.4 V± 0.1 V (typical, from lower edge to upper edge at 10%/div)

BNC connector ✽75 Ω terminated at 100 MHz input
COMPOSITE OUTPUT: For NTSC, 1 Vp-p (75 Ω terminated), BNC connector
EXT REF INPUT: 10 MHz ± 10 Hz, –10 to +2 dBm (50 Ω terminated), BNC connector
REF BUFFERED OUTPUT: ≥0 dBm (50 Ω terminated), BNC connector
1ST LOCAL OUTPUT: 4 to 7 GHz, ≥+8 dBm, 50 Ω, SMA-J connector

Signal search AUTO TUNE, PEAK → CF, PEAK → REF, SCROLL
Zone marker NORMAL, DELTA
Marker → MARKER → CF, MARKER → REF, MARKER → CF STEP SIZE, ∆ MARKER → SPAN, ZONE → SPAN
Peak search PEAK, NEXT PEAK, NEXT RIGHT PEAK, NEXT LEFT PEAK, MIN DIP, NEXT DIP
Multimarker Number of markers: 10 max. (HIGHEST 10, HARMONICS, MANUAL SET)

Noise power (dBm/Hz, dBm/ch), C/N (dBc/Hz, dBc/ch), occupied bandwidth (power N% method, X-dB down method),
adjacent channel power (REF: total power/reference level/in-band level method, channel designate display: 2 channels ×
2 graphic display), average power of burst signal (average power in designated time range of time domain waveform),
channel power (dBm, dBm/Hz), template comparison (upper/lower limits × each 2, time domain), MASK (upper/lower ×
each 2, frequency domain)

Save/recall Saves setting conditions and waveform data to internal memory (max. 12) or memory card.

Printer (HP dotmatrix, EPSON dotmatrix compatible models):

Display data can be hard-copied via RS-232C, GPIB and Centronics (Option 10) interface.
Plotter (HP-GL, GP-GL compatible models): Display data can be output via RS-232C and GPIB interface.
Language: PTL (interpreter based on BASIC)
Programming: Using external computer.
Program memory: Memory card, upload/download to/from external computer
Programming capacity: 192 kB
Data processing: Directly accesses measurement data according to system variables, system subroutines, and system
functions

RS-232C Outputs data to printer and plotter. Control from external computer (excluding power switch).

Meets IEEE488.2. Controlled by external computer (excluding power switch). Or controls external equipment with PTA.
Interface function: SH1, AH1, T6, L4, SR1, RL1, PP0, DC1, DT1, C1, C2, C3, C4, C28
Automatic correction of insertion loss of MA1621A Impedance Transformer
Correction accuracy (RF ATT: ≥10 dB):

±2.5 dB (9 to 100 kHz), ±1.5 dB (100 kHz to 2 GHz), ±2.0 dB (2 to 3 GHz) ✽Typical value
Functions: Saving/recalling measurement parameters/waveform data, uploading/downloading PTA programs;
Applicable cards: SRAM, EPROM, Flash EPROM (Only SRAM writable; Card capacity: 2 MB max.)
Connector: Meets the PCMCIA Rel. 2.0; 2 slots
Frequency range: 18 to 110 GHz
Frequency band configuration

Band K: 18 to 26.5 GHz (n=4), Band A: 26.5 to 40 GHz (n=6), Band Q: 33 to 50 GHz (n=8), Band U: 40 to 60 GHz (n=9),

Band V: 50 to 75 GHz (n=11), Band E: 50 to 90 GHz (n=13), Band W: 75 to 110 GHz (n=16)
Span setting range: 0 Hz, (100 × n) Hz to each bandwidth ✽n: local harmonic order
Level measurement

Mixer conversion loss setting range: 15 to 85 dB
Maximum input level: Depends on the external mixer used

Average noise level: Depends on the external mixer used
Reference level setting range: –100 dBm to (–25 to M) dBm ✽Log scale, M: mixer conversion loss
Frequency response: Depends on the external mixer used
Suitable mixer: 2-port mixer only (local frequency: 4 to 7 GHz, IF frequency: 689.31 MHz)
Display gain: 0 ±2 dB (external mixer input: –10 dBm, when the mixer conversion loss is 15 dB)
EN61326: 1997/A2: 2001 (Class A)
EN61000-3-2: 2000 (Class A)
EN61326: 1997/A2: 2001 (Annex A)

LVD EN61010-1: 2001 (Pollution Degree 2)
Vibration Meets the MIL-STD-810D
Power (operating range) 85 to 132/170 to 250 Vac (automatic voltage switching), 47.5 to 63 Hz, ≤400 VA
Dimensions and mass 320 (W) × 177 (H) × 381 (D) mm, ≤15 O (without option)
Ambient temperature 0° to +50°C (operate), –40° to +75°C (storage)

Auxiliary signal
input and output

Measure

Hard copy

PTA

GPIB

Correction

Memory card interface

Frequency

Amplitude

Input/output

EMC

FunctionsExternal mixerOthers

Specifications

17

Resolution bandwidth (3 dB) 30 Hz, 100 Hz, 300 Hz
Resolution bandwidth
switching uncertainty

±0.4 dB (RBW 3 kHz reference)

Resolution bandwidth accuracy ±20%
Selectivity (60 dB : 3 dB) ≤15:1

Option 02: Narrow resolution bandwidth

Resolution bandwidth (3 dB) 10 Hz, 30 Hz, 100 Hz, 300 Hz
Resolution bandwidth
switching uncertainty

±0.4 dB (RBW 3 kHz reference)

Resolution bandwidth accuracy ±20%
Selectivity (60 dB : 3 dB) ≤15:1

≤–135 dBm (1 MHz to 1 GHz), ≤–135 dBm + 1.5f [GHz] dB (1 to 3.1 GHz), ≤–132 dBm (3.1 to 8.1 GHz),

Average noise level ≤–131 dBm (8.0 to 14.3 GHz), ≤–123 dBm (14.1 to 26.5 GHz), ≤–119 dBm (26.2 to 40 GHz)

✽RBW: 10 Hz, VBW: 1 Hz, RF ATT: 0 dB

Option 03: Narrow resolution bandwidth

Sweep time 12.5 µs, 25 µs, 50 µs, 100 to 900 µs (one most significant digit settable), 1.0 to 19 ms (two upper significant digits settable)
Accuracy ±1%
Marker level resolution Log scale: 0.1 dB, Linear scale: 0.2% (relative to reference level)

Option 04: High-speed time domain sweep

✽ : This option is recommended to be mounted together with option 06.

Specifications

18

Trigger switch FREERUN, TRIGGERED

EXT

Trigger level: ±10 V (resolution: 0.1 V), TTL level
Trigger slope: Rise/fall
Connector: BNC

VIDEO

Log scale: –100 to 0 dB (resolution: 1 dB)
Trigger slope: Rise/fall

WIDE IF VIDEO

Trigger level: High, middle, or low selectable
Bandwidth: ≥20 MHz
Trigger slope: Rise/fall

LINE

Frequency: 47.5 to 63 Hz (line lock)

Pre-trigger (displays waveform from previous max. 1 screen at trigger occurrence point)
Range: –time span to 0 s, Resolution: time span/500
Post trigger (displays waveform from after max. 65.5 ms at trigger occurrence point)
Range: 0 to 65.5 ms, Resolution: 1 µs

In frequency domain, displays spectrum of input signal in specified gate interval.
Gate delay: 0 to 65.5 ms (from trigger point, resolution: 1 µs)
Gate width: 2 µs to 65.5 ms (from gate delay, resolution: 1 µs)

Option 06: Trigger/gate circuit

Trigger source

Trigger delay

Gate sweep

Voice output With internal loudspeaker and earphone connector (ø3.5 jack), adjustable volume

Option 07: AM/FM demodulator

Function Outputs data to printer (Centronics standard)
Connector D-sub 25-pin (jack)

Option 10: Centronics interface*1

Sweep output (X) 0 to 10 V ±1 V (≥100 kΩ ter mination, from left side to right side of display scale), BNC connector
Sweep status output (Z) TTL level (low level with sweeping), BNC connector

Option 15: Sweep signal output

Models Frequency range Flange Max. input power
MA2740A 18 to 26.5 GHz MIL-F-3922/68-001KM 100 mW
MA2741A 26.5 to 40 GHz MIL-F-3922/68-001AM 100 mW
MA2742A 33 to 50 GHz MIL-F-3922/67B-006 100 mW
MA2743A 40 to 60 GHz MIL-F-3922/67B-007 100 mW
MA2744A 50 to 75 GHz MIL-F-3922/67B-008 100 mW
MA2745A 60 to 90 GHz MIL-F-3922/68B-009 100 mW
MA2746A 75 to 110 GHz MIL-F-3922/68B-010 100 mW

External mixer

Specifications

✽1: GPIB interface can not be installed simultaneously.

19

Ordering Information

Model/order No. Name Remarks

Main frame

MS2668C Spectrum analyzer

Standard accessories

Power cord, 2.6 m : 1 pc
F0013 Fuse, 5 A : 2 pcs
W1335AE MS2668C operation manual : 1 copy
B0329G Front cover 3/4MW4U

Options

MS2668C-02 Narrow resolution bandwidth 30, 100, 300 Hz
MS2668C-03 Narrow resolution bandwidth 10, 30, 100, 300 Hz
MS2668C-04 High-speed time domain sweep 1.25 µs/div
MS2668C-06 Trigger/gate circuit Pre-trigger and post trigger available
MS2668C-07 AM/FM demodulator Outputs to loudspeaker or earphone connector
MS2668C-10 Centronics interface GPIB interface can not be used simultaneously.
MS2668C-15 Sweep signal output X, Z
MS2668C-90 Extended three year warranty service
MS2668C-91 Extended five year warranty service

Application parts

J0911 Coaxial cord (K-P • K-P), 1 m DC to 40 GHz, SUCOFLEX 102A
J0912 Coaxial cord (K-P • K-P), 0.5 m DC to 40 GHz, SUCOFLEX 102A
34AKNF50 Coaxial adaptor DC to 20 GHz, SWR: 1.5 (ruggedized K-P•N-J)
J0322B Coaxial cord (SMA-P • SMA-P), 1 m DC to 18 GHz, SUCOFLEX 104
J0561 Coaxial cord (N-P-5W • 5D-2W • N-P-5W), 1 m
J0104A Coaxial cord (BNC-P • RG-55/U • N-P), 1 m
CSCJ-256K-SM 256 KB memory card Meets PCMCIA Rel. 2.0
CSCJ-512K-SM 512 KB memory card Meets PCMCIA Rel. 2.0
CSCJ-001M-SM 1024 KB memory card Meets PCMCIA Rel. 2.0
CSCJ-002M-SM 2048 KB memory card Meets PCMCIA Rel. 2.0
B0395A Rack mount kit (IEC)
B0395B Rack mount kit (JIS)
MP612A RF Fuse Holder DC to 1000 MHz, 50 Ω (N-type)
MP613A Fuse Element For MP612A
J0805 DC block (Model 7003) 10 kHz to 18 GHz, ±50 V, N-type, Weinschel product
J0910 DC block (Model 7006) 10 kHz to 18 GHz, ±50 V, SMA-type, Weinschel product
MA2507A DC Block Adaptor 50 Ω, 9 kHz to 3 GHz, ±50 V, N-type
MA8601A DC Block Adaptor 50 Ω, 30 kHz to 2 GHz, ±50 V, N-type
MA8601J DC Block Adaptor 75 Ω, 10 kHz to 2.2 GHz, ±50 V, NC-type
MA1621A 50 Ω→75 Ω Impedance Transformer 75 Ω, 9 kHz to 3 GHz, ±100 V, NC-type
MP614B 50 Ω←→75 Ω Impedance Transformer 50 to 1200 MHz (transformer type), NC-type
J0007 GPIB cable, 1 m 408JE-101
J0008 GPIB cable, 2 m 408JE-102
J0742A RS-232C cable, 1 m For PC-98 Personal Computer and VP-600, D-sub 25-pins

(straight)
J0743A RS-232C cable, 1 m For PC/AT compatible, D-sub 9-pins (cross)
J0064A 7 GHz band coaxial/waveguide adaptor 5.8 to 8.6 GHz, N-J•BRJ-7
J0064C 10 GHz band coaxial/waveguide adaptor 8.2 to 12.4 GHz, N-J•BRJ-10
J0004 Coaxial adaptor (N-P • SMA-J)
DGM010-02000EE Coaxial cord, 2 m N-type connector, general use
DGM024-02000EE Coaxial cord, 2 m N-type connector, low-loss type
J0063 Fixed attenuator for high power 30 dB, 10 W, DC to 12.4 GHz, N-type
J0395 Fixed attenuator for high power 30 dB, 30 W, DC to 9 GHz, N-type
J0078 Fixed attenuator for high power 20 dB, 10 W, DC to 18 GHz, N-type
MP526D High Pass Filter 400 MHz band, N-type
MA1601A High Pass Filter 800/900 MHz band, N-type
MA2740A External mixer 18 to 26.5 GHz
MA2741A External mixer 26.5 to 40 GHz
MA2742A External mixer 33 to 50 GHz
MA2743A External mixer 40 to 60 GHz
MA2744A External mixer 50 to 75 GHz
MA2745A External mixer 60 to 90 GHz
MA2746A External mixer 75 to 110 GHz
B0421A Carrying case (hard type) With caster
B0421B Carrying case (hard type) Without caster
B0435A Carrying case (soft type)

Please specify model/order number, name and quantity when ordering.

ANRITSU CORPORATION

5-1-1 Onna, Atsugi-shi, Kanagawa, 243-8555 Japan
Phone: +81-46 - 223 - 1111
Fax: +81-46 - 296 - 1264

•

U.S.A.
ANRITSU COMPANY
TX OFFICE SALES AND SERVICE

1155 East Collins Blvd., Richardson, TX 75081, U.S.A.
Toll Free: 1-800 - ANRITSU (267 - 4878)
Phone: +1- 972 - 644 - 1777
Fax: +1-972 - 644 - 3416

•

Canada
ANRITSU ELECTRONICS LTD.

700 Silver Seven Road, Suite 120, Kanata,
ON K2V 1C3, Canada
Phone: +1-613 - 591 - 2003
Fax: +1-613 - 591 - 1006

•

Brasil
ANRITSU ELETRÔNICA LTDA.

Praca Amadeu Amaral, 27 - 1 andar
01327-010 - Paraiso, Sao Paulo, Brazil
Phone: [phone] - 2511
Fax: +55-11 - 3886940

•

U.K.
ANRITSU LTD.

200 Capability Green, Luton, Bedfordshire LU1 3LU, U.K.
Phone: [phone]
Fax: +44-1582 - 731303

•

Germany
ANRITSU GmbH

Nemetschek Haus Konrad-Zuse-Platz 1 81829
München, Germany
Phone: [phone]
Fax: [phone]

•

France

ANRITSU S.A.

9, Avenue du Québec Z.A. de Courtabœuf 91951 Les
Ulis Cedex, France
Phone: +33-1-60 - 92 - 15 - 50
Fax: +33-1 - 64 - 46 - 10 - 65

•

Italy

ANRITSU S.p.A.

Via Elio Vittorini, 129, 00144 Roma EUR, Italy
Phone: [phone] - 9711
Fax: +39-06 - 502 - 2425

•

Sweden

ANRITSU AB

Borgafjordsgatan 13 164 40 Kista, Sweden
Phone: [phone]
Fax: [phone]

•

Finland

ANRITSU AB

Teknobulevardi 3-5, FI-01530 Vantaa, Finland
Phone: +358-9 - 4355 - 220
Fax: +358-9 - 4355 - 2250

•

Denmark

Anritsu AB Danmark

Korskildelund 6 DK - 2670 Greve, Denmark
Phone: [phone]
Fax: [phone]

•

Singapore

ANRITSU PTE LTD.

10, Hoe Chiang Road #07-01/02, Keppel Towers,
Singapore 089315
Phone: [phone]
Fax: +65-6282 - 2533

•

Hong Kong

ANRITSU COMPANY LTD.

Suite 923, 9/F., Chinachem Golden Plaza, 77 Mody
Road, Tsimshatsui East, Kowloon, Hong Kong, China
Phone: [phone]
Fax: [phone] - 3545

•

P. R. China
ANRITSU COMPANY LTD.
Beijing Representative Office

Room 1515, Beijing Fortune Building, No. 5 North
Road, the East 3rd Ring Road, Chao-Yang District
Beijing 100004, P.R. China
Phone: +86-10 - 6590 - 9230

•

Korea
ANRITSU CORPORATION

8F Hyun Juk Bldg. 832-41, Yeoksam-dong,
Kangnam-ku, Seoul, 135-080, Korea
Phone: +82-2 - 553 - 6603
Fax: +82-2 - 553 - 6604

•

Australia
ANRITSU PTY LTD.

Unit 3/170 Forster Road Mt. Waverley, Victoria, 3149,
Australia
Phone: [phone] - 8177
Fax: +61-3 - 9558 - 8255

•

Taiwan
ANRITSU COMPANY INC.

7F, No. 316, Sec. 1, NeiHu Rd., Taipei, Taiwan
Phone: [phone] - 1816
Fax: +886-2 - 8751 - 1817

Specifications are subject to change without notice.

Catalog No. MS2668C-E-A-1-(6.00) Printed in Japan 2005-12 KL/CDT

051114

Printed on 70%
Recycled Paper