VOLTCRAFT DSA Series Spectrum Analyzer User Manual

DSA Series Spectrum Analyzer

User Manual



DSA-115



DSA-136

General Warranty

We warrants that the product will be free from defects in materials and workmanship for a period of 3 years from the date of purchase of the product by the original purchaser from for accessories is 12 months. This warranty only applies to the original purchaser and is not transferable to a third party.

If the product proves defective during the warranty period, we will either repair the defective product without charge for parts and labour, or will provide a replacement in exchange for the defective product. Parts, modules and replacement pr o ducts used by our company for warranty work may be new or reconditioned like new. All replaced parts, modules and products become the property of our company.

To obtain service under this warranty, the customer must notify our company of the defect before the expiration of the warranty period. Customer shall be responsible for packaging and shipping the defective product to the designated service centre, a copy of the customer's proof of purchase is also required.

This warranty shall not apply to any defect, failure or damage caused by improper use or improper or inadequate maintenan ce and car e. We shall not be obligated to furnish service under this warranty a) to repair damage resulting from attempts by personnel other than our company representatives to install, repair or service the product; b) to repair damage resulting from improper use or connection to incompatible equipment; c) to repair any damage or malfunction caused by the use of not our supplies; or d) to service a product that has been modified or integrated with other products when the effect of such modification or integrat ion i ncrea se s the time or difficulty of servicing the product.

our company. The warranty period

Please contact the nearest Sales and Service Offices for services or a complete copy of the warranty statement.

Excepting the after-sales services provided in this summary or the applicable warranty statements, we will not offer any guarantee for maintenance definitely declared or hinted, including but not limited to the implied guarantee for marketability and special-purpose acceptability. We should not take any responsibilities for any indirect, special or consequent damages.

Table of contents

List of figures ........................................................................ iii

List of tables .......................................................................... iii

1. General Safety Requir ements .......................................... 1

2. Safety Terms and Symbols ............................................... 4

3. Document Overview .......................................................... 5

4. Quick St ar t .......................................................................... 6

4.1 General Inspection .......................................................... 6

4.2 Safety Precaution before O peration ............................. 6

4.3 First T ime to Power on .................................................... 9

4.4 Front Panel ..................................................................... 10

4.5 Rear Panel...................................................................... 16

4.6 User Interface ................................................................ 18

4.7 Build-in Help ................................................................... 19

4.8 Basic Measurement ...................................................... 20

5. Menu Interpretation ......................................................... 24

5.1 【FREQ】Frequency ................................................... 24

5.2 【SPAN】 ...................................................................... 27

5.3 【AMPTD】Amplitude ................................................. 28

5.4 【Auto】Auto Tune ...................................................... 32

5.5 【BW】Bandwidth ........................................................ 32

5.6 【Trace】 ....................................................................... 34

5.7 【Detector】 .................................................................. 36

5.8 【Display】 .................................................................... 37

5.9 【Sweep】 .................................................................... 39

5.10 【Trig】 ........................................................................ 40

5.11 【Source】 .................................................................. 40

5.12 【Demod】Demodulation ......................................... 42

5.13 【Peak】 ..................................................................... 43

5.14 【Marker】 .................................................................. 45

5.15 【Marker→】 .............................................................. 48

5.16 【Marker Fctn】Marker Function ............................ 50

5.17 【Meas】Measurement ............................................ 51

5.18 【Meas Setup】 ......................................................... 55

5.19 【System】 ................................................................. 56

5.20 【File】 ........................................................................ 61

5.21 【Print】 ...................................................................... 61

5.22 【Save】 ..................................................................... 62

6. Specification .................................................................... 64

6.1 Frequency ....................................................................... 64

6.2 Amplitude ........................................................................ 65

6.3 Sweep ............................................................................. 67

6.4 Trac king G enerator ....................................................... 67

6.5 Demodulation ................................................................. 68

6.6 Frequency Counter ....................................................... 69

6.7 Inputs and Outputs ........................................................ 69

6.8 General S pecification .................................................... 70

7. Warranty ........................................................................... 72

7.1 Troubleshooting ............................................................. 72

7.2 Spectrum Analyzer Repair ........................................... 73

8. Appendix ........................................................................... 74

Appendix A: Enclosure ........................................................ 74

Appendix B: General Care and Cleaning ......................... 74

List of figures

Figure 4-1 Front panel .............................................................. 10

Figure 4-2 Function Keys ......................................................... 11

Figure 4-3 Numeric Keypad..................................................... 14

Figure 4-4 The knob ................................................................. 15

Figure 4-5 Direction keys ......................................................... 15

Figure 4-6 Rear Panel .............................................................. 16

Figure 4-7 User interface ......................................................... 18

Figure 4-8 Full Span ................................................................. 21

Figure 4-9 Set frequency span ................................................ 22

Figure 4-10 Set reference level ................................................. 23

List of tables

Table 4-1 Working Power Variation Range ............................. 7

Table 4-2 Front Panel Description .......................................... 10

Table 4-3 Function Key Description ....................................... 11

Table 4-4 Rear Panel Description ........................................... 16

Table 4-5 User interface Description ...................................... 18

Table 5-1 Detector type comparison ...................................... 36

Table 5-2 [Factory] Settings ..................................................... 57

iii

1.General Safety Requirements

1. General Safety Requirements

Before use, please read the following safety precautions to avoid any possible b odil y inj ury and t o prevent this produc t or any other connected products from damage. To avoid any contingent dang er, ensure this product is only used wit hin t he ranges specified.

 Use Proper Power Cord. Use only the power cord supplied

with the product and certif i ed to use in your country.

 Product Grounded. This instrument is grounded through the

power cord grounding conductor. To avoid electric shock, the grounding conductor must be grounded. The product must be grounded properly before any connection with its input or output terminals.

 Check all Terminal Ratings. To avoid fire or shock hazard,

check all ratings and markings on this product. Refer to the user manual for more information about ratings before connecting to the instrument.

 Use Proper Overvoltage Protection. Make sure that no

overvoltage (such as that caused by a thunderstorm) can reach the product, or el se the oper ator might expose to danger of electrical shock.

 Do not operate without covers. Do not operate the

instrument with covers or panels removed.

 Avoid exposed circuit. Be careful when working on exposed

circuitry to avoid risk of elec t r ic shock or other injury.

 Do not operate if an y damage. If you suspect damage to

the instrument, have it inspected by qualified service personnel before further use. Any maintenance, adjustment or replacement especially to circuits or accessories must be performed by qualified ser vice personnel.

 Use your Oscillosco pe in a well-ventilated area. Make sure

the instrument installed with proper ventilation.

 Do not operate in damp conditions. In order to avoid short

1.General Safety Requirements

circuiting to the interior of the device or electric shock, please do not operate in a humid environment.

 Do not operate in an explosive atmosphere. In order to

avoid damages to the device or personal injuries, it is important to operate the device away from an explosive atmosphere.

 Keep product s urfac es cle an and dry. To avoid the influence

of dust or moisture in air, please keep the surface of device clean and dry.

 Electrostatic Prevention. Operate the instrument in an

electrostatic discharge protective environment to avoid damage induced by st atic discharges. Always ground both the internal and external conductors of cables to release static before making connections.

 Protect the Input Terminals of Instrument. Do not bend or

hit the input terminals and the connected devices, (such as filter, attenuator, etc.) as such stress may cause damages to

devices and the instrument. Do not mix the use of 50Ω and

75Ω connectors and/or cables.

 Do Not Overload the Input. To avoid damaging the

instrument, the signals at i nput ter minal must be less t han 50V DC voltage components and 30 dBm (1 W) AC (RF) components.

 Appropriate Use of Power Meter. If you are not sure of the

characteristics of signal under measure, follow these recommendations to ensure safe operations: if a RF power meter is available, use it to measure the power level of this signal first; or add a rated external attenuator between signal cable and input terminal of the instrument. Maximum attenuation, reference level and maximum span frequency should be selected, so as to make the signals displ ayed within the screen.

 Know About the Specification Conditions of the

Instrument. For maximum perfor mance of the inst rument, use the analyzer under specified conditions.

1.General Safety Requirements

 Handling Safety. Please handle with care during

transportation to avoid damages to buttons, knob, interfaces and other parts on the panels.

2.Safety Terms and Symbols

WARNING

Warning indicates conditions or practices that could result in injury or loss of life.

DANGER

Indicates an immediate hazard or injury possibility.

WARNING

Indicates a possible hazar d or inj ur y.

CAUTION

Indicates potential dama ge to the instrument or other



Refer to

Manual

CAUTION

Caution indicates the conditions or practices that could result in damage to this product or other property.

2. Safety Terms and Symbols

Safety Terms

Terms in this manual (The following terms may appear in this

manual):

Terms on the product (The following terms may appear on this product):

property.

Safety Symbols

Symbols on the product (The following symbols may appear on

the product):

Hazardous

Voltage

Chassis

Ground

3. Document Overview

 Quick Start

This chapter states the matters need to attention before first power on, how to power on at first time, introduces spectrum analyzer’s front/rear pane l and us er i nt er f ac e, explains how to use the instrument with a meas urement example demonstration.

 Menu interpretation

This chapter offers spectrum analyzer’s front panel me nu and button interpretation.

 Specification Parameter

This chapter lists spectru m an alyzer’s specification para meter .

 Trouble Shooting

This chapter helps to implement the troubleshooting and deal with after sale repair.

 Appendix

This chapter introduces acc essories of spectrum analyzer and how to maintain device.

Convention o n but ton and menu key format:

Button: Button character + bold bracket, e.g. 【FREQ】stands for FREQ button.

Menu key words+brac ket, e.g.[Center frequency] stands for 【FREQ】function’s center frequency item, that is common called softkey menu item.

Related document: Related documents including: Quick guide, User manua l, programme guide and etc.

4. Quick Start

This chapter states the matters need to attention before first power on, and how to power on at first ti me, analyzer’s front/rear pane l and us er i nt er f ac e, explains how to use the instrument with a measur ement example demonstration.

4.1 General Inspection

When you receive your new instrument, it is recommended that you check the instru m ent fo ll ow ing these steps:

1.Check for transportation damage.

If it is found that the packaging carton or the foamed plastic protection cushion has suffered serious damage, do not throw it away until the complete device and its accessories have been electrically and mechanically checked.

2.Check the Accessori es

The supplied accessories are described in the "Appendix A: Enclosure" of this Manual. Please ensure that all the listed

accessories are present and undamaged, if any problems are found please contact y our distr ibutor or our local office.

3.Check the Complet e Instrument

If there is any physical damage, operational fault, or performance issue please contact your distributor or our local office. If there is any damage to the instrument please ensure you keep the original packaging. Ideally you should always keep the original packaging if the instrument must be returned for repair.

introduces spectru m

4.2 Safety Precaution befor e O per a ti on

4.2.1 Check Power Supply

The analyzer is equipped with a three-wire power cord in accordance with international safety standards. The product must be grounded properly before being powered on, as floating or improper ground may cause damage to the instrument or personal injury.

Make sure the grounding conductor of the spectrum analyzer is grounded before turning on the instrument. After which the AC power cord can be connected. Do not use a non-ground power cord.

4.2.2 Allowed Variation Range of Supply Power Parameters

The spectrum analyzer is compatible with 100V~240V, 50Hz-60Hz AC power, Table 4-1 lists the power requirement to run the spectrum analyzer.

Table 4-1 Working Power Variation Ran ge

Power Supply Parameter

Voltage 100 - 240 VAC Frequency Power 22 W

To prevent or lower the risk of damage to the spectrum analyzer from power interference between instruments, especially from peak pulses produced by large power consumption instruments, a 220V/110V AC regulated power supply is recommended.

Compatible Range

50 - 60 Hz ±10％

4.2.3 Power Cord Selection

The analyzer is equipped with a three-wire power cord in accordance with internati onal s afet y standards. This cabl e grou nds the analyzer cabinet when connected to an appropriate power line outlet. The cable must be rat ed gr eat er than 250Vac and 2A.

WARNING

Improper grounding may cause damage to the instrument, or result in personal injury. Make sure the grounding conductor of the spectrum analyzer is grounded before turning on the instrument. Always use a well-grounded power source. Do not use an external power cable, power cord or an auto transformer without grounded protecti on. If this produ ct is to be powere d via an external auto transformer for voltage reduction, ensure that its common terminal is connected to a neutral (earthed pole) of the power s upply .

WARNING

Make sure the supply power is

the

analyzer

Refer to “First Time to

Power on" section 3.

WARNING

The above ESD protections measures cannot be used when working with over 5 00V!

stable before turning on

to protect it from damage.

4.2.4 Electro-static Discharge (ESD) Protection

ESD is an issue often ignored by users. Damage from ESD on the instrument is unlikely to occur immediately but will significantly reduce the reliability of it. Therefore, ESD precautions should be implemented in the wor k environment, and applied daily.

Generally, there are two steps to manage ESD protection:

1) Conductive table mats to connect hands via wrist bands

2) Conductive ground mat t o connec t f eet via ankle straps Implement both protection methods will provide a good level of

anti-static protection. If used alone, the protection will not be as reliable. To ensure user’s safety, anti-static components should offer at least 1MΩ isolation resistance.

WARNING

Check the power source before turning on the spectrum analyzer, to protect the device from damage.

Make good use of anti-static technology to protect components from damage:

1) Quickly ground the internal an d external cond uctor of the coaxial cable before it is connected w it h t he spec t r um analyzer.

2) Staff must wear anti-static gloves before touching the connector cord or doing any assemble work.

3) Assure all the instruments are grounded properly to avoid static storage.

4.3 First Time to Power on

Connect the three-pin A C power cord into the instrument . Insert t he plug into a power socket provided with a protective ground.

1) Press the power switch panel.

2) Self-initialization takes about 30 seconds, after the boot screen the spectrum analyzer w ill defa ult t o t he sc anning curve.

3) After power on, let the spectrum analyzer warm up for 30 minutes for stabilization to obtain the most accurate results.

on the bottom left of the front

4.4 Front Panel

9 6

1 2

NO.

Description

NO.

Description

LCD

Numeric keypad

Menu softkeys

Tracking generator output connector

Function keys

Tracking generator output On/Off button

Knob

Earphone interface

Arrow keys

USB Host port

RF Input connector long push to turn off)

Unit keys

Table 4-2 Front Panel Description

① ②

③

④ ⑤ ⑥

⑦

4.4.1 Front Panel Function Key

Figure 4-1 Front panel

⑧ ⑨

⑩

⑪ ⑫ ⑬

Power key (Push to turn on,

Basic keys

Marker measure

Advanced

measure

Utility keysControl keys

Keys

Description

Basic keys

Activates the frequency sweep span

Activates the reference level function, and accesses the amplitude softkeys, with

you set functions that affect data on

the vertical axis.

FREQ

SPAN

AMPTD

AUTO

Figure 4-2 Function Keys

Table 4-3 F unctio n Key Description

Activates the center-frequency funct ion, and accesses the frequency function menu.

function, and set Full Span\Zero Span\Last Span.

which

Searches the signal automat ically within the full frequency range.

Control keys

Activates the RBW (resolution bandwidth) function, and accesses the softkeys that

ons and

averaging.

Accesses the softkeys that allow you to

Accesses the softkeys that allow you to including the display line, graticule and

label.

the sweep time, select the sweep mode of

Accesses the softkeys that allow you to

Marker measure keys

Places a marker on the highest peak, and

l keys that

Accesses the marker function softkeys that allow you to set other system parameters based on the current mark er value.

Sweep

Trig

Marker

Trace

Display

Detector

Source

Demod

Peak

Marker

control the bandwidth functi

store and manipulate trace information.

configure detector functions.

control what is displayed on the analyzer,

Accesses the softkeys that allow you to set the analyzer.

select the trigger mode of the analyzer. Accesses the softkeys that allow you to set

the tracking generator. Accesses the softkeys that allow you to set

the demodulation.

accesses the Peak functions menu. Accesses the marker contro

select the type and number of markers and turns them on and off.

Accesses the menu of special functions,

marker, N dB bandwidth

measure and frequency counting.

Advanced measure keys

Accesses the softkeys that let you make transmitter power measurements such as ACPR(adjacent channel power), channel

ameters for the selected

Utility keys

Accesses the softkeys that allow you to

Resets the analyzer to the factory settings

[Preset►].

Accesses the softkeys that allow you to save current screen, trace data, or user state.

Press the Help key to activate the help

System

Save

File

Help

Meas

Setup

Preset

Marker

Fctn

such as noise

power, and OBW(occup ie d bandwidth), etc. Sets the par

measurement function.

Sets the system parameters, and accesses the calibration menu.

configure the file system of the analyzer.

or user state. This state can be specified in 【System】→ [PowerOn/Preset►]→

Accesses the softkeys that allow you to set the print parameters.

system. Press the Help key again to exit.

4.4.2 Parameter Input

Specific parameter v alues are ab le to be ent ered us ing the num eric keypad, knob, and directional keys.

Numeric Keypad

Figure 4-3 Numeric Keypad

1. Numeric keys Numbers 0-9 are available to be used.

Decimal point A decimal point "." will be inserted at the cursor position when this key is pressed.

Sign key Sign key "+/-" is to toggle the sign of a parameter. When pressed the first time, a "-" will be inserted and changed into "+" following the second press.

4. Unit keys

Unit keys include GHz/dBm/s, MHz/dB/ms, kHz/dBmV/μs

and Hz/mV/ns. After entering the desired numbers, choose an appropriate unit to complete the input. The specific meaning of unit is decided by the type of input parameter ("frequency", "amplitude" or "time").

Cancel Key

(1) During the editing process this key will clear the inputs in

the active area and exit editing mode at the same time. (2) Turn off the display in the active area. (3) Exit current test mode whil e in key board test.

Back Key

(1) During the process of parameter editing, this key will

delete the characters on t he left side of the cursor.

(2) While in the process of file name editing, pressing this

key will delete characters that have been entered.

7. Enter When pressed, the system will complete the input process

and insert a default measurement unit for the parameter automatically.

Knob

Figure 4-4 The knob The knob function: During parameter edit i ng, turn the knob clockwise to increa se, or counterclockwise to decrease the parameter values at s peci fied steps.

Direction key

Figure 4-5 Direction keys

The directional keys have fo llowing functions:

1) Increase or decrease the parameter value at specific steps

while editing a parameter.

2) Move the cursor though the d irectory tree in the【File】function.

4.4.3 Front Panel Connector

1. USB Host

The analyzer may serve as a "host" device to connect to external USB devices. This interface is available for USB storage devices.

2. GEN Output 50Ω (tracking generator output 50Ω)

CAUTION

Input voltage at RF input port must not be higher than 50 V DC to avoid damage to the attenuator and input mixer tracking generator.

CAUTION

When input attenuator is higher than 10 dB, the RF port input signal must be less than +30 dBm.

8 7 6 5 4 3

NO.

Name

Description

The output of the tracking generator can be connected to a receiver through an N type male connector, users can purchase this option if required.

3. RF Input 50Ω The RF input may be connected to a device v ia a N type connector

4.5 Rear Panel

Figure 4-6 Rear Panel

Table 4-4 Rear Panel Description

①

Handle

Stow the handle for mobil e use.

AC power

AC: frequency 50Hz±10％, single-phase alternative 220V±15％ or 110V±15

Stool

To adjust the angle of the dev ice

VGA port

provides a VGA signal output which is projector

LAN

Through this interface, t he analyzer can remote control.

USB Device

This configurable USB port permits

connection.

10MHz IN/OUT

The BNC input or output of the 10 MHz reference clock

Lock hole

You can lock the spectrum analyzer to a

spectrum analyzer.

②

③ ④

⑤

⑥

⑦

connector

interface

％

used through a VGA cable or with a

be connected to your local net w or k for

external USB devices. It suppor ts PictBridge printer and remote-control

⑧

fixed location using the sec ur ity lock (please buy it yourself) to secur e t he

4.6 User Interface

NO.

Name

Description

Related Key

Amplitude

Can choose logarithmic

AMPTD】→

[Scale Type]

Amplitude

Display division scale

AMPTD】→

[Scale/Div]

Reference level

AMPTD】→

[Ref Level]

Detection type

Display detection type

Attenuation

Display input attenuation setting

AMPTD】→

[Attenuation]

Table 4-5 User interface Description

①

Division Type

②

Division

③

④ ⑤

Figure 4-7 User interface

or linear

【

【Detector】

【

⑥

Marker

Display current activated marker

Date/time

Display system date and time

System】→

[Date/Time]

Display frequency and marker

Menu item

Menu item of current function

Menu title

Function of current menu belongs to.

LAN access sign

USB storage device

Show if USB storage device is inserted;

Temperature sign

Display device internal temperature

Sweep Time

System sweep time

Sweep】→

[Sweep Time]

Span

Display span width

SPAN】→

[Span]

Video

Display video bandwidth

→

[VBW]

Center frequency

Display center frequency

FREQ】→

[Center Freq]

Resolution bandwidth

Display resolution bandwidth

→

[RBW]

System status

Display spectrum analyzer status

【Marker】

⑦

⑧⑨

⑩

⑪

⑫

⑬

⑭

⑮

⑯

⑰

⑱

⑲

⑳

Marker readout

bandwidth

amplitude of current

【

【Marker】

【

【BW】

【

【BW】

4.7 Build-in Help

The built-in help provides information that refers to ev er y function key and menu key on the front p anel. Users can view this help information if required.

1.How to acquire built-in help

+ 55 hidden pages