ADVANTEST U3741, U3751 Service Manual

Spectrum Analyzers

Compact Design with High Performance
Pioneering 3 GHz/8 GHz Spectrum Analyzers are Now Available!

U3741/3751

The U3741/3751 portable spectrum analyzer

supports a great range of applications, from

use on production lines to system installation

and maintenance. Its digital IF enables dramatic

improvements in power measurement accuracy

for digitally modulated signals. Moreover, the

U3741/3751 provides twice the throughput of its

predecessor. A light and compact 3 GHz/8 GHz

spectrum analyzer, the U3741/3751 provides ba-

sic performance reliably and at a low cost.

●

Better measuring speed due to high-speed processing
(twice as fast as its predecessor)

●

Dramatically improved power measurement accuracy
for digitally modulated signals

●

Built-in 3 GHz/8 GHz pre-amp standard

●

Average display noise level:

-155 dBm/Hz@1 GHz, pre-amp ON

●

Tracking generator covering a frequency range of
100 kHz to 3 GHz

●

Option available for measurement of phase noise
characteristics

●

Lightweight and compact design, with a maximum
weight of only 5.6 kg

●

Continuous operation of up to 2.5 hours with the
battery pack

U3741/ 3751 Web Demonstration

Please access to the http://www.advantest.co.jp/en-index.shtml and click on the following links.

PRODUCTS & SUPPORT Electronic Measuring Instruments Products U3751

2

U3741/3751-1E Mar. ’07

75 Ω Input Impedance

Option Guide

● —

OPT.15

Used for measurement of CATV and TV signals

Product name

Main unit support

U3741

(9 kHz to 3 GHz)

U3751

(9 kHz to 8 GHz)

Model number Overview

High-Stability Frequency
Reference Source

●●

OPT.20

High-stability reference oscillator with an aging
rate of ± 2 x 10

-8

/day, ±1 x 10-7/year

EMC Filter

●

1)

●

1)

OPT.28

CISPR bandwidths are available for EMI
measurement.
RBW (6 dB down): 200 Hz, 9 kHz, 120 kHz, 1 MHz

High-Purity
Spectrum Analysis

●

1)

●

1)

OPT.70

High-purity spectrum analysis with -100 dBc/Hz
@ 10 kHz offset
RBW 30 Hz has also been added.

75 Ω Tracking Generator

●

2)

—

OPT.75

Used for evaluation of frequency characteristics
in a range from 100 kHz to 2.2 GHz.
Output power range: 107 to 47 dBµV

50 Ω Tracking Generator

●

1)

●

1)

OPT.76

Used for evaluation of frequency characteristics
in a range from 100 kHz to 3 GHz.
Output power range: 0 to -60 dBm

1) OPT.15 and OPT.75 cannot be installed simultaneously. 2) OPT.15 is required, and cannot be installed simultaneously with OPT.76.

IF OUT

21.4-MHz IF
signal output

VIDEO

Output to an
external VGA
monitor

Main function keys

Data Entry

GPIB

EXT TRIG USB

POWER CAL OUT

Soft-key block

RF INPUT

Control keys

EXT REF

Standard signal input
for external reference

LAN

Control and remote operation,
utilizing an external PC

6.5-inch color liquid
crystal display (LCD)

Exclusive function keysExtension-key block

Front Panel

Rear Panel

USB

Output file data to USB
memory or a USB printer
Image files: PNG, BMP
Setting files: BIN, XML

TG OUT

Tracking generator

(option)

Battery mount

Mount for the battery pack
(battery sold separately)

DC INPUT

Operation with an external
DC power supply
+11 VDC to +17 VDC

PHONE

Earphone jack for

demodulated

AM/FM audio

U3741/3751-1E Mar. ’07

3

4

U3741/3751-1E Mar. ’07

5-minute warm-up time

With the U3741/3751, warm-up time has been reduced to a scant
5 minutes (at an ambient temperature of 20 to 30°C). This short­ened period virtually eliminates pre-warming time as a considera­tion, and permits quick and accurate measurement.

High throughput

This spectrum analyzer delivers data transfer speed superior to that
of its predecessor. While the previous model delivered 875 ms, the
U3741/3751 boasts a speed of 350 ms: double the system through­put

*2

(using the GPIB interface)*3. This faster speed contributes to
a significant reductions to cost of test on production lines and in
similar applications.

Compact Design with High Performance

Our conventional model

U3741/3751

Time

Stable measurement

5

min.

Measuring time

Our conventional model

U3741/3751

Improvements in overall accuracy

Digitized IF sections and innovative circuit technology dramatically
improve absolute power measurement accuracy.

±0.8 dB (10 MHz to 3 GHz: U3741/3751)
±1.0 dB (3 to 8 GHz: U3751)

Standard USB (1.1) interface

Screenshots in BMP or PNG format can easily be sent via USB
external memory. Users can easily store data, and easily paste mea­surement data into reports.

ADC Digital RBW Digital Det

Digital IF Block

RF Input

Up to 2.5 hours*1of nonstop battery-driven operation

The spectrum analyzer uses one of three power systems: AC (100
V/200 V), DC (+11 V to +17 V), or the battery pack. This flexi­bility enables measurement in a variety of applications, whether in
the factory or in the field.

Compact design

At about half the size of its predecessor, this spectrum analyzer
offers a compact design while maintaining the same level of func­tionality. Its form factor gives it portability, enabling it to be used
anywhere.

*1: Typical value at room temperature, without options
*2: Twice that of its predecessor
*3: Sample case where the frequency and span are specified, and the channel power measurement

result is transferred

Extensive array of measurement functions

Measurement functions include Channel Power, Total Power,
Avg Power, OBW, ACP, Spurious measurement, Harmonics mea­surement, IM measurement, Noise/Hz calculation functions,
multi-marker (10 markers), delta marker, peak marker functions,
a channel setting function, and a 3-trace simultaneous sampling
function.

U3741/3751-1E Mar. ’07

5

RMS Average, essential for power measurement

Power tends to be spread over a wide frequency range, and the peak
factor tends to be higher in digital modulation, with it’s expanded
communication capacity. The U3741/3751 allows precise power
measurements by determining the effective values (RMS values)
from instantaneous power values obtained in high-speed sampling
and translating them into a power spectrum. This method also
enables measurement reproducibility of 0.01 dB in power mea­surement of digitally modulated signals.

Pre-Amp covering the 3 GHz/8 GHz bandwidth

The U3741/3751 contains as standard a pre-amp that covers all
frequency bands. In the analysis of faint signals, its input sensitiv­ity can be equivalent to that of high-end models. Also, it effec­tively compensates for the loss from the antenna when measuring
radio signals in an outdoor environment.

Measurement Functions

Built-in frequency counter with 1-Hz resolution

Frequency can be accurately measured by simply positioning the
cursor on the target spectrum selected from multiple spectral lines.
The U3741/3751 is indispensable for measuring the carrier wave
frequency in a general multi-carrier system.

Example of ISDB-T
Channel Power
measurement

Example of multi­carrier signal frequency
measurement

Example of high­sensitivity measurement
in high-sensitivity mode

USER keys

An arbitrary key can be selected from the hierarchical function
keys and assigned to a USER function. Users can thus configure
their own, original setup for operations by assigning frequently
used functions to specific software keys.

Example of
user function
assignment

Zoom function

The measuring window and F-F mode can facilitate analysis of a
specific signal in broadband measurement. Also, RBW can be
changed independently, enabling high-speed measurement of the
target signal in both broadband and narrowband. A variety of
other signal analysis functions are also available, including those in
F-T mode or T-T mode.

Example of two-screen
sample from
measurement in
broadband and
narrowband

Spectrum emission mask function

Using tools such as a spectrum mask and limit line to judge
PASS/FAIL is effective at improving production line throughput
for digital appliances. Using the spectrum emission mask (SEM)
function can facilitate measurement for standards such as wireless
LAN.

Example of S.E.M.
measurement for
wireless LAN

6

U3741/3751-1E Mar. ’07

Gated Sweep OFF

User-friendly and Convenient Functions

Burst Signal

Synchronized

signals

RF INPUT

EXT TRIG

Ideal for remote operation/monitoring via a LAN

This spectrum analyzer is equipped with a 10/100BASE-T LAN
port as standard, so it can be operated remotely from an external
PC. It can be installed in an unattended radio transmission station,
and remotely operated and monitored from another station.

LAN

PC

PC

Server

Searching for the location of a fault in a coaxial cable

When used with its tracking generator option and the sample soft­ware for an external PC, the U3741/3751 can measure the dis­tance to the failure point (open/short) in a coaxial cable. This
application permits this distance to be measured from one end of
the coaxial cable.

Power splitter

Cable

PC with sample software

GPIB

TG OUT RF INPUT

Screen for measuring the distance to a cable failure point

Screen of remote operation/monitoring from an external PC via LAN

Gated Sweep ON

Gated Sweep function

A radar or TDMA communication system controls its output
transmission by turning the power on/off intermittently. To mon­itor the power spectrum during transmission, the Gated Sweep
function is effective at analyzing the spectrum only when the signal
is present and over only the area chosen. This function also
includes an IF trigger that does not require synchronized signals.

U3741/3751-1E Mar. ’07

7

High-Purity Spectrum Analysis OPT.70

Phase noise measurement is indispensable to evaluation of the
characteristics of high-frequency oscillation circuits or modules.
The high-purity spectrum analysis option offered with the
U3741/3751 can improve the phase noise measurement perfor­mance of the spectrum analyzer. Because the performance can be
selected, selecting the most suitable spectrum analyzer for the
device under test (DUT) is simple. At the same time, the added
resolution bandwidth of 30 Hz enables reduction of the display
average noise level and analysis in a high dynamic range.

EMC Filter OPT.28

Option 28 adds 6 dB RBW CISPR bandwidths for EMI measure­ment of 200 Hz, 9 kHz, 120 kHz, and 1 MHz. A broadband
sweep by the spectrum analyzer is very effective at measuring noise
emitted from electrical devices. Installing OPT.28 allows measure­ment in CISPR-specified bandwidths. It enables simple, fast mea­surement using the Positive peak detector and Max Hold, which
makes it effective at compensating for emitted noise. It guarantees
an impulse bandwidth accuracy of 1 MHz. This capability con­forms to the standard for noise measurement of 1 GHz or above.

Extensive Array of Options

Example of measurement using EMI sample software

Example of phase noise measurement

-140

-130

-120

-110

-100

-90

-80

-70

110100 1,000 10,000

Carrier Offset Frequency [kHz]

@ 2 GHz
@ 5 GHz

Phase Noise [dBc/Hz]

Phase noise characteristic graph (representative values)

8

U3741/3751-1E Mar. ’07

Tracking Generator OPT.75/76

Generates synchronized signals for frequency sweeps by the spec­trum analyzer.

OPT.75 Output impedance: 75 Ω

Output frequency range: 100 kHz to 2.2 GHz

OPT.76 Output impedance: 50 Ω

Output frequency range: 100 kHz to 3 GHz

Functions for evaluating frequency characteristics

The normalize function enables direct measurement of cable loss
and filter characteristics. The frequency offset function of the
tracking generator enables measurement of frequency characteris­tics and conversion loss characteristics of mixers and other fre­quency conversion devices.

Accessories

Many accessories are available, including an easy-to-carry transit
case and a battery pack, useful for field work.

Extensive Array of Options and Accessories

Example of measurement of mixer frequency conversion loss characteristics

Function for return loss measurement

The SWR bridge can be used to measure reflection characteristics
of an antenna or filter. It can determine the return loss and evaluate
the VSWR.

Example of filter return loss measurement

TG OUT

RF INPUT

Fin Fout

Lo

Frequency

conversion device

Antenna, filter, etc.

SWR bridge

TG OUT

RF INPUT

Characteristics of a filter

Characteristics of
a mixer + filter

DC power cable

Carrying bag

Transit case

Battery pack

Charger

50Ω–75Ω
impedance converter

U3741/3751-1E Mar. ’07

9

Specifications

Frequency

Frequency range

U3741: 9 kHz to 3 GHz,

9 kHz to 2.2 GHz (with the OPT.15 installed)

Pre-Amp: 10 MHz to 3 GHz,

10 MHz to 2.2 GHz (with the OPT.15 installed)
Synchronizable
frequency range: 9 kHz to 3 GHz

U3751: 9 kHz to 8 GHz

Frequency band: 9 kHz to 3.1 GHz (band 0),

3 GHz to 8 GHz (band 1)
Pre-Amp: 10 MHz to 8 GHz

Frequency reading
accuracy: ± (marker read value x frequency reference

accuracy + span x span accuracy + residual FM)

Frequency reference stability

Aging rate: ±2 x 10

-6

/year

Temperature stability: ±2.5 x 10-6(0 to 50°C)

Frequency counter: At a signal level S/N > 50 dB

Resolution: 1 Hz to 1 kHz
Accuracy: ± (counter read value x frequency reference

accuracy + residual FM + 1 LSB)

Frequency stability

Residual FM (zero/span): < 60 Hzp-p/100 ms

(internal frequency reference)

Frequency span

Range: 5 kHz to Full, zero span

1 kHz to Full, zero span

(with the OPT.70 installed)

Accuracy: < ±1%

Spectrum purity: -85 dBc/Hz (offset 10 kHz, span < 200 kHz)

With the OPT.70 installed: -100 dBc/Hz (offset 10 kHz, span < 1 MHz)

Resolution bandwidth

Range:

U3741: 100 Hz to 1 MHz (1 to 3 steps)

30 Hz to 1 MHz (with the OPT.70 installed)
U3751: 100 Hz to 3 MHz (1 to 3 steps)

30 Hz to 3 MHz (with the OPT.70 installed)

Accuracy: < ±12%

Video bandwidth range: 10 Hz to 3 MHz (1 to 3 steps)

Sweep

Sweep time

Setting range: 20 ms to 1000 s (spectrum mode)

50 µs to 1000 s (zero span)

Accuracy: < ±2% (zero span)

Sweep mode: Continuous, single, gated

Trigger function

Trigger source: Free run, video, external, IF

Amplitude range

Measurement range:

Noise level to +30 dBm

Noise level to 134 dBµV (with the OPT.15 installed)

Maximum safe input level: Attenuator ≥ 10 dB

Pre-Amp OFF: +30 dBm, 134 dBµV (with the OPT.15 installed)
Pre-Amp ON: +13 dBm, 120 dBµV (with the OPT.15 installed)
U3741: ±50 VDC max.
U3751: ±15 VDC max.

Input attenuator range: 0 to 50 dB (10 dB steps)

Display range: 100/50/20/10/5 dB, linear

Scale unit: dBm, dBmV, dBµV, dBµVemf, dBpW, W, V

Reference level
setting range: -140 to +40 dBm

-31.2 to 148.8 dBµV

(with the OPT.15 installed)

Detection mode: Normal, Positive peak, Negative peak,

Sample, RMS, and Average

Amplitude accuracy

Calibration signal

Frequency: 20 MHz
Level: -20 dBm (75 Ω, with the OPT.15 installed)
Accuracy: ±0.3 dB, ±0.4 dB (with the OPT.15 installed)

Scale display accuracy

Log: ±0.5 dB/10 dB, ±0.5 dB/80 dB, ±0.2 dB/1 dB

Overall amplitude
accuracy: After calibration, with the pre-amp OFF, and

at a temperature ranging from 20 to 30°C
Input attenuator 10 dB

U3741: Reference level 0 dBm,

input signal level -10 to -50 dBm
±1.0 dB (9 kHz to 3 GHz)
±0.8 dB (10 MHz to 3 GHz)

With the OPT.15 installed: Reference level 108.8 dBµV

Input signal level 98.8 to 58.8 dBµV
±2.1 dB (9 kHz to 2.2 GHz)
±0.9 dB (10 MHz to 2.2 GHz)

U3751: Reference level 0 dBm,

input signal level -10 to -50 dBm
Image suppression OFF
±1.5 dB (9 kHz to 10 MHz)
±0.8 dB (10 MHz to 3.1 GHz)
±1.0 dB (3.1 MHz to 8 GHz)

Dynamic range

Displayed average
noise level: Reference level < -45 dBm (63.8 dBµV,

with the OPT.15 installed)
Resolution bandwidth 100 Hz

U3741

Pre-Amp OFF: -123 dBm + 2f (GHz) dB (f < 2.5 GHz)

-123 dBm + 2.5f (GHz) dB (f ≥ 2.5 GHz)

-12 dBµV + 2f (GHz) dB (f ≤ 2.2 GHz,
with the OPT.15 installed)

Pre-Amp ON: -138 dBm + 3f (GHz) dB

-27 dBµV + 3f (GHz) dB
(with the OPT.15 installed)

U3751: Frequency 10 MHz to 8 GHz

Pre-Amp OFF: -123 dBm + 2f (GHz) dB (f ≤ 3.1 GHz)

-122 dBm + 1f (GHz) dB (f ≥ 3 GHz)

Pre-Amp ON: -138 dBm + 3f (GHz) dB (f ≤ 3.1 GHz)

-139 dBm + 1.3f (GHz) dB (f ≥ 3 GHz)

1 dB gain compression

U3741: Frequency > 20 MHz

Pre-Amp OFF: > -5 dBm

> 102 dBµV (with the OPT.15 installed)

Pre-Amp ON: > -25 dBm

> 82 dBµV (with the OPT.15 installed)

U3751: Frequency > 20 MHz

Pre-Amp OFF: > -8 dBm
Pre-Amp ON: > -25 dBm

Second harmonic distortion

U3741: <-70 dBc (Pre-Amp OFF, Frequency > 20 MHz,

Mixer input level -30 dBm (77 dBµV, with
the OPT.15 installed))

U3751: <-70 dBc

(Pre-Amp OFF, Frequency > 200 MHz,
Mixer input level -40 dBm)
<-75 dBc (typ., Pre-Amp OFF, Frequency
> 300 MHz, Mixer input level -30 dBm)

Third order intermodulation distortion

U3741: < -60dBc (Pre-Amp OFF, Mixer input level

-20 dBm (88.8 dBµV, with the OPT.15
installed), Frequency > 10 MHz,
2 signal separation > 200 kHz)

U3751: < -50 dBc (Pre-Amp OFF, Mixer input level

-20 dBm, Frequency 10 MHz to 8 GHz,
2 signal separation > 200 kHz)

Image/multiple/out of
band response: < -60 dBc (Mixer input level -20 dBm

(88.8 dBµV, with the OPT.15 installed),
Image suppression ON (U3751))

Residual response

U3741: < -90 dBm

(Frequency > 1 MHz , Pre-Amp OFF)

< 21 dBµV (with the OPT.15 installed)

U3751: < -80 dBm

(Frequency 10 MHz to 8 GHz, Pre-Amp OFF)

10

U3741/3751-1E Mar. ’07

Inputs/outputs

RF input

Connector: N-type female
Impedance: 50 Ω (nominal)

75 Ω (nominal, with the OPT.15 installed)

VSWR: Input attenuator > 10 dB

U3741: < 1.5 : 1

< 1.6 : 1 (with the OPT.15 installed)

U3751: < 1.7 : 1 (Frequency < 3.0 GHz)

< 2.0 : 1 (Frequency > 3.0 GHz)

Calibration signal output

Connector: BNC female
Impedance: 50 Ω (nominal)

75 Ω (nominal, with the OPT.15 installed)
Frequency: 20 MHz
Level: -20 dBm

Frequency reference input

Connector: BNC female
Impedance: 50 Ω (nominal)
Frequency (MHz): 1, 1.544, 2.048, 5, 10, 12.8, 13, 13.824, 14.4,

15.36, 15.4, 16.8, 19.2, 19.44, 19.6608,

19.68, 19.8, 20, 26

Level: 0 to +16 dBm

External trigger input

Connector: BNC female
Impedance: 10 kΩ (nominal), DC coupling
Level: 0 to +5 V

21.4-MHz IF output
Connector: BNC female
Impedance: 50 Ω (nominal)
Level: Approx. mixer input level + 10 dB

(at a frequency of 20 MHz)

Battery mount

Connector: AntonBauer QR mount

External DC power input

Connector: XLR-4
Voltage range: +11 to +17 V

GPIB: IEEE-488 bus connector
USB: USB 1.1
Video output connector: D-sub15 pin female
LAN connector: RJ45 type, 10/100 base-T
Audio output: Small monophonic jack

General specifications

Operating environment range: Ambient temperature: 0 to + 50°C

Humidity: RH 85% or less (no condensation)
Storage environment range: -20 to +60°C, RH 85% or less
AC power input:

Automatic switching to 100 VAC or 200 VAC

100 V: 100 to 120 V, 50/60 Hz

200 V: 220 to 240 V, 50/60 Hz
DC power input: DC + 11 V to +17 V
Power consumption: 100 VA or less (AC operation)

70 W or less (DC operation)
Mass

U3741: 5 kg or less (without option)

U3751: 5.6 kg or less (without option)
External dimensions
(W x H x D): Approx. 308 x 175 x 209 mm

(not including protruding parts)
Approx. 337 x 190 x 307 mm
(including the handle and feet)

OPT.20 High-Stability Frequency Reference Source

Frequency reference stability

Aging rate: ±2 x 10

-8

/day

±1 x 10

-7

/year

Warm-up drift: ±5 x 10

-8

(+25°C, 10 minutes after power-on)

Temperature stability: ±5 x 10-8( 0 to +40°C, with reference to 25°C)

OPT.28 EMC Filter

6 dB bandwidth: 200 Hz, 9 kHz, 120 kHz, 1 MHz
Bandwidth accuracy: < ±10%

OPT.70 High-Purity Spectrum Analysis

Frequency span

Range: 1 kHz to Full, zero span

Accuracy: < ±1%

Resolution bandwidth

Range: U3741: 30 Hz to 1 MHz (1 to 3 steps)

U3751: 30 Hz to 3 MHz (1 to 3 steps)

Accuracy: < ±12%

Spectrum purity: -100 dBc/Hz

(offset 10 kHz, span < 1 MHz)

Displayed average noise level: Reference level < -45 dBm,

Resolution bandwidth 30 Hz

U3741: Frequency 10 MHz to 3 GHz

Pre-Amp OFF: -126 dBm + 2f (GHz) dB (f < 2.5 GHz)

-126 dBm + 2.5f (GHz) dB (f ≥ 2.5 GHz)

Pre-Amp ON: -141 dBm + 3f (GHz) dB

U3751: Frequency 10 MHz to 8 GHz

Pre-Amp OFF: -126 dBm + 2f (GHz) dB (f ≤ 3.1 GHz)

-125 dBm + 1f (GHz) dB (f ≥ 3 GHz)

Pre-Amp ON: -141 dBm + 3f (GHz) dB (f ≤ 3.1 GHz)

-142 dBm + 1.3f (GHz) dB (f ≥ 3 GHz)

U3741/3751-1E Mar. ’07

11

OPT.75 75 Ω Tracking Generator

Frequency range: 100 kHz to 2.2 GHz

Frequency offset

Range: 0 Hz to 1 GHz
Accuracy: ±300 Hz
Resolution: 1 kHz

Output level range: 107 to 47 dBµV (0.5 dB steps)

Output level accuracy: ±0.5 dB (20 MHz, 97 dBµV, +20 to +30°C)

Output level flatness: Using 20 MHz and 97 dBµV as a reference

±1.0 dB (1 MHz to 1 GHz)
±1.5 dB (100 kHz to 2.2 GHz)

Output level switch error: Using 20 MHz and 97 dBµV as a reference

±1.0 dB (1 MHz to 1 GHz, 107 to 47 dBµV)
±2.0 dB (1 MHz to 2.2 GHz, 107 to 47 dBµV)

Frequency offset OFF: ±3.0 dB (100 kHz to 2.2 GHz, 107 to 77 dBµV)

±4.0 dB (100 kHz to 2.2 GHz, 76.5 to 47 dBµV)

Frequency offset ON: ±5.0 dB (100 kHz to 2.2 GHz)

Output spurious: Output level 97 dBµV

Harmonic: < -15 dBc (100 kHz to 1 MHz)

< -20 dBc (1 MHz to 2.2 GHz)

Non-harmonic: < -20 dBc (Frequency offset OFF)

TG leakage: < 31 dBµV (Input attenuator 0 dB)

Output impedance: 75 Ω (nominal)

VSWR: ≤ 2.0 : 1 (Output level ≤ 97 dBµV)

Maximum allowable level: 117 dBµV, ±10 VDC

OPT.76 50 Ω Tracking Generator

Frequency range: 100 kHz to 3 GHz

Frequency offset

Range: 0 Hz to 1 GHz
Accuracy: ±300 Hz
Resolution: 1 kHz

Output level range: 0 to -60 dBm (0.5 dB steps)

Output level accuracy: ±0.5 dB (20 MHz, -10 dBm, +20 to +30°C)

Output level flatness: Using 20 MHz and -10 dBm as a reference

±1.0 dB (1 MHz to 1 GHz)
±1.5 dB (100 kHz to 3 GHz)

Output level switch error: Using 20 MHz and -10 dBm as a reference

±1.0 dB (1 MHz to 1 GHz, 0 to -60 dBm)
±2.0 dB (1 MHz to 2.6 GHz, 0 to -60 dBm)

Frequency offset OFF: ±3.0 dB (100 kHz to 3 GHz, 0 to -30 dBm)

±4.0 dB (100 kHz to 3 GHz, -30.5 to -60 dBm)

Frequency offset ON: ±5.0 dB (100 kHz to 3 GHz)

Output spurious: Output level -10 dBm

Harmonic: < -15 dBc (100 kHz to 1 MHz)

< -20 dBc (1 MHz to 3 GHz)

Non-harmonic: < -20 dBc (Frequency offset OFF)

TG leakage: < -80 dBm (Input attenuator 0 dB)

Output impedance: 50 Ω (nominal)

VSWR: ≤2.0 : 1 (Output level ≤ -10 dBm)

Maximum allowable level: +10 dBm, ±10 VDC

Ordering information

Main unit

Spectrum analyzer: U3741

U3751

Accessories

Operating manual (CD): BU3700S
Power cable: A01412
Input cable: A01037-0300

With the OPT.15 installed: D3C0025-S-SA

N-BNC adapter: JUG-201A/U

With the OPT.15 installed: BA-A165
NC-F adapter (with the OPT.15 installed): NCP-NFJ
Ferrite core: ESD-SR-120

Options

75 Ω Input Impedance: OPT.15
High-Stability Frequency Reference Source: OPT.20
EMC Filter: OPT.28
High-Purity Spectrum Analysis: OPT.70
75 Ω Tracking Generator: OPT.75
50 Ω Tracking Generator: OPT.76

Accessories

Japanese operating manual (printed manual): JU3700S
English operating manual (printed manual): EU3700S
Battery pack: A870008
Charger: A870009
75 Ω input impedance converter: ZT-130NC
DC power cable: A114020
Carrying bag: A129001
Transit case: A129002
Rack mount kit (JIS): A122003
Rack mount kit (EIA): A124004

Note on accessories:
The operating manual on the CD is supplied as standard.
The printed version of the operating manual is offered as an accessory.

Please refer to product manual for complete system specifications.
Specifications may change without notification.

ADVANTEST CORPORATION

Shin-Marunouchi Center Building, 1-6-2 Marunouchi, Chiyoda-ku, Tokyo 100-0005, Japan Phone: [phone]

©2007 ADVANTEST CORPORATION Printed in Japan Bulletin No.U3741/3751-331E Mar. ’07 IC

http://www.advantest.co.jp