DB4004 User Manual

MAINTENANCE AND OPERATION

INSTRUCTION MANUAL

DB4004

DSP-based FM Radio Monitoring Receiver with TCP/IP Connectivity

Publish Date: 06-Nov-2012

Contents

Introduction ........................................................................................................................................ 5

General Information .......................................................................................................................... 6

Product Features ................................................................................................................................ 7

Technical Specifications .................................................................................................................. 8

Block Diagram .............................................................................................................................. 10

Before you start ................................................................................................................................ 11

Safety Precautions ......................................................................................................................... 11

Operating Environment Recommendations................................................................................... 12

Installation Specifications and Precautions regarding the RF Environment.

Antenna Consideration. ................................................................................................................. 13

Connecting AC Power and Voltage Selection ............................................................................... 14

Panel Indicators, Switches and Connectors................................................................................... 15

Front Panel – Left and Right Areas............................................................................................... 15

Left Area ................................................................................................................................... 15

Right Area ................................................................................................................................. 15

OLED Display ..................................................................................................................... 15

Soft Buttons .......................................................................................................................... 15

Navigational Buttons ........................................................................................................... 15

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

Rear Panel Alarm Terminal .......................................................................................................... 17

Operation .......................................................................................................................................... 18

A Word about Measurement Limitations ....................................................................................... 18

Signal Strength ......................................................................................................................... 18

Multipath Distortion ................................................................................................................. 18

Co-channel Interference ........................................................................................................... 19

First Time POWER ON ................................................................................................................. 20

Front Panel – Readout Section (Left Side) .................................................................................... 21

Phones ...................................................................................................................................... 21

Bargraphs and LED Indicators, Select Buttons ....................................................................... 21

FM MODULATING METERING ........................................................................................ 21

SELECT Button .................................................................................................................... 21

AUDIO DEMOD METERING ............................................................................................. 21

L, R, L+R, L–R ..................................................................................................................... 22

LOSS .................................................................................................................................... 22

Front Panel - LCD Display, Navigational & Soft Buttons (Right Side)........................................ 23

Display ...................................................................................................................................... 23

Header Area .............................................................................................................................. 24

Soft Buttons ............................................................................................................................... 25

Main Screen Working Area ....................................................................................................... 26

Operating Modes and Pages ......................................................................................................... 27

Home Page ............................................................................................................................... 27

“Preset” explained .............................................................................................................. 27

Creating a new Preset .......................................................................................................... 27

Bandscan Page ......................................................................................................................... 28

Span control state: ............................................................................................................... 30

Marker control state: ........................................................................................................... 32

Parameter control state: ...................................................................................................... 33

FFT Page .................................................................................................................................. 34

Scope Page ............................................................................................................................... 36

Measure Stereo page ................................................................................................................ 37

Graphs page ............................................................................................................................. 38

Levels page ............................................................................................................................... 40

RDS decoder page .................................................................................................................... 44

Settings page ............................................................................................................................. 46

List of DB4004 settings .................................................................................................................... 52

WARRANTY TERMS AND CONDITIONS ................................................................................. 60

Product Registration Card .............................................................................................................. 61

THIS PAGE

IS INTENTIONALLY

LEFT BLANK

65 Aleksandar Stamboliyski Str., 8000 Bourgas, Bulgaria

Tel: +359 56 820027, Fax: +359 56 836700

E-mail: [email protected] ,Web: www.devabroadcast.com

Introduction

DEVA Broadcast Ltd. was established in 1997 as a broadcasting and telecommunications equipment importer for Bulgaria and Eastern Europe regions. Subsequently, DEVA Broadcast Ltd. has developed and produced a wide range of low and mid power transmitters, RDS/RBDS Encoders and Decoders, Modulation Monitors, Remote Controls, Site monitoring and other systems for many companies. Our high degree engineers accomplish their bright ideas through successful engineering, marketing and management in DEVA Broadcast Ltd.’s Headquarter in Bulgaria.

During the last ten years the company products have become our partners’ best sellers. After detailed marketing analysis, our team has decided to launch its own brand products based on the latest technologies in the broadcasting business. The company’s main goal is to design, develop and offer a complete line of high quality and competitive products for FM and Digital Radio,

Radio Networks, Telecommunication Operators and regulation authorities. We base our market authority position on our good after sales support and relation with the clients.

Since 2003 DEVA Broadcast Ltd. has been ISO 9001 certified .

The contractors of DEVA Broadcast Ltd. are satisfied with the permanent business comfort and to their own confession they owe it to a great extent as well as their prosperity to the loyal partnership of our company.

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General Information

The DB4004 is our second generation digital FM Radio Modulation Analyzer. It combines our long term experience in FM Radio Monitoring and FM radio measurement “know how.” The RF

(IF) signal is digitalized as soon as it enters the device and all signal processing is then made through

DSP algorithms. Digitizing the signal in this way, at the input, gives the equipment measurement reproducibility over time. The powerful accuracy of the digital filters used in this equipment enables the FM multiplex signals components to be accurately and repeatedly reproduced from one device to another. The incredible processing power in the device enables all measurements to be refreshed simultaneously and synchronously, thereby allowing for detailed readings of all the Multiplex FM signal components. The DB4004 has easy to read, high-resolution OLED graphical display and ultra-bright bargraph LED 60 segment indicators that allow reading the main signal parameters at a glance. The built-in DB4004 Oscilloscope representing the observed signal change over time enables you to visualize the most important signals participating in the process of demodulating and stereo decoding. Complimenting the Oscilloscope mode, the Spectrum analyzer mode allows spectral analysis of the input signal and part of DB4004 features. Spectral components of the selected signal are determined on the basis of Fast Fourier Transform. MPX

Power and all other level measurements are supported by measurement history data. In addition to the list of DB4004 features, RDS information contained in the processed MPX signal is easily visualized and represented as RDS/RBDS Data and detailed RDS/RBDS Statistics.

Dependable off-air monitoring lets you keep an eye on other stations in the market as well as measuring the important parameters of your own signal. Adjustable Alarms enable alerting for most the important signal components and parameters to be generated and are fed to the Rear

Panel Alarm Terminal for remote alarm notification. The DB4004 is designed to support USB and

LAN communication interfaces, allowing flexibility in remote connection and control of the unit.

The DB4004 is the most cost effective way for regular monitoring of the quality and continuity of your station and up to 50 other FM Radio Stations, with many innovative features such as TCP/

IP connectivity, audio streaming, and automatic alerts for operation outside of predefined ITU-R ranges. In case of transmission failure, maintenance staff will be immediately alerted via E-mail,

SNMP, or SMS which allows technicians to restore a normal service as soon as possible. This tool instantly enhances the quality control management for radio stations. The DB4004 allows you to monitor all RDS/RBDS and other signal parameters from anywhere via its communication channels TCP/IP, and allows GSM Connectivity via the optional external GSM Modem. Easy channel status monitoring or audio listening from anywhere uses your mobile phone. With the

Audio Stream Server you can even listen to, skim, and record the audio from another station.

All the channel measurements and logs are saved in internal device memory. The built-in FTP system manages the files by an assigned schedule. All the collected information is centralized in a database and can be revised, played back, and sent automatically to the qualified staff as needed.

The Interactive Software-based Log Viewer tool allows the very detailed control and analysis of any station from the list of monitored channels. The Band Analyzer function in the DB4004 presents an overview of all FM signals available, plus the RF signal strength of these stations.

Scans are possible within any section of the band in the FM band in 3 different modes. The generated spectrum diagram shows the RF Level vs. the Frequency. Scheduled Band Scans can also be enabled for RF intruder or pirate transmissions detection. The Deva Broadcast’s DB4004 is a superb monitoring system designed as a powerful tool for FM Radio signal analysis and regular off-air monitoring of your stations.

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Product Features

• FM Band 87 - 108 MHz Basic Spectrum Analyzer

• Dual antenna ports with built-in RF attenuator

• Up to 100 dBµV direct RF Antenna Input

• Selectable wide range IF filter bandwidth

• Fully DSP-based core

• Bright, accurate bar graph LED metering of the Modulation and Pilot Levels

• Total and independent Positive and Negative deviation bar graph

• Left, Right, L+R, L-R bar graph LED audio level meters

• Wide angle, easy to read OLED display

• Very Intuitive Navigational Menu

• Built-in Oscilloscope for IF, MPX, Pilot, RDS, Left & Right display

• Levels measurement with data history

• Spectrum analyzer allowing checking of the RF Carrier and MPX

• Selectable De-emphasis - Off, 50µs and 75µs

• Quick Station access via 4 Presets

• Built-in Stereo Decoder

• Real Time Audio Program Streaming

• Remote Listening via optional GSM modem

• Built-in 50 channel Data logger

• Built-in WEB and FTP server

• Easy to use WEB interface

• Apple and Android devices support

• SNTP for automatic synchronization of the built-in clock

• RDS and RBDS decoder with BER meter

• Alarm dispatch via E-mail, SMS, SNMP and GPO

• Complete status reporting with SMS via optional GSM modem

• Protected access to the device settings

• Level Adjustable, Balanced Analog Audio Outputs on XLR Connectors

• Professional AES/EBU, SPDIF and Optical Digital audio outputs

• LAN port for full TCP/IP remote control and monitoring

• Adjustable MIN/MAX alarms for RF, Pilot Left & Right Audio Levels

• Adjustable MIN/MAX alarms for MPX, MPX Power & RDS

• USB communication interface for local connectivity

• Headphone output with front panel level control

• Firmware updates will ensure improved operation

• Accurate front-panel metering for local use

• Restore Factory Parameters option

• Easy Installation and Setup

• Wide operating voltage range: 100-240V AC

• 19” Professional Case for high RF immunity

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TECHNICAL SPECIFICATIONS

RF INPUT

Tuning Range

Tuning Step

Tuner Sensitivity

Antenna Ports

Antenna Ports Isolation

Internal Attenuator

Dynamic range

FM DEMOD

IF Filter Bandwindth

Frequency Response

MPX Power

Dynamic range

STEREO DECODER

Frequency Response (L and R)

SNR (Stereo)

THD

Separation

Crosstalk

RDS DECODER

Standards

Error Correction & Counting

AF Decoding

CT (Time/Date)

PI, PTY, DI, MS

TA/TP

RT (Radio Text), RT+

PS (Program Service name)

TMC, ODA

Group Analyzer

BER Analyzer

Group Sequence Display

RDS RAW Data Display

88 to 108 MHz, Frequency Agile

10, 20, 50, 100 kHz

30 dBµV

Dual, 2 x BNC Connectors, 50Ω

> 40 dB

0, 10, 20 and 30 dB

100 dB

15 Increments (27kHz - 157kHz, Auto)

±0.1 dB, 10 Hz to 86 kHz

±12 dBr, 20 sec. integration

90 dB

±0.1 dB, 10 Hz to 15 kHz

60 dB, 50 µs de-emphasis

0.1%, 10 Hz to 15 kHz, 50 µs de-emphasis

50 dB, 50 Hz to 10 kHz, 50 µs de-emphasis

52 dB

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

Yes

European RDS CENELEC; United States RBDS NRSC

Yes

Yes

Yes

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FFT SPECTRUM ANALYSIS (RF, COMPOSITE, AUDIO)

Signal Sources

FFT length

RF (IF), MPX, Left, Right

2048 points

Dynamic range 90 dB

SCOPE ANALYSIS (RF, COMPOSITE, AUDIO)

Signal Sources RF (IF), MPX, Pilot, RDS, Main, Sub, Left, Right

Record length

Dynamic range

METERING ACCURACY

4096 points

90 dB

RF Level

MPX Power

Total, Pos, Neg

Pilot, RDS

±1 dB, 0 to 100 dBµV

±0.2 dBr, -12 to 12 dBr, 0.1 dBr resolution

±2 kHz, 10 to 100 kHz, 1 kHz resolution

±0.5 kHz, 1 to 12 kHz, 0.2 kHz resolution

±1 dB, +10.0 to -55.0 dB, 0.1 dB resolution Audio

OUTPUTS

Composite

Audio (L, R)

AES3 (L, R)

SPDIF (L, R)

Optical (L, R)

Alarms

Headphone

3.5 Vp-p @ 75kHz, 75Ω, unbalanced BNC Connector

+12 dBm, 600Ω balanced XLR Connector

5.0 Vp-p, 110Ω , balanced XLR Connector

3.0 Vp-p, 110Ω, unbalanced BNC Connector

Transmitter, TOSLINK

Programmable terminals on rear panel, optoisolated

6,3mm (1/4”) Phone Jack

COMMUNICATION INTERFACES

USB B-type Connector

RJ45 Connector

15 pin Male D-Sub Connector

Ethernet 10/100 Base-T

GSM Modem

MEASUREMENT STORAGE

Storage

Data format

POWER

2GB Build-in Memory Card

Text, CSV

Supply

Connector

SIZE AND WEIGHT

Dimensions (W;H;D)

Shipping Weight

100-240V / 50-60 Hz / 25W

IEC320

485 x 44 x 180 mm, 19” x 1.7” x 6.9”

3kg, 7lb

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BLOCK DIAGRAM

A simplified block diagram of DB4004 is shown below

Analog

Tuner

L / R

DSP

Downconverting

FM demodulation

Stereo decoding

Metering

MPX

Rear Panel

Analog Audio

SPDIF

AES/EBU

Optical MPX Out

GPO

GSM Modem

Ethernet

USB

User controls

Control and

Communication

CPU

Front panel

LED

OLED

Because of the all-digital, minimalist-discrete-component nature of device circuitry, we have not provided schematic diagrams of the DB4004 in this Manual. Please, note that:

NO USER-SERVICEABLE COMPONENTS INSIDE.

REFER ALL SERVICING TO

QUALIFIED TECHNICAL PERSONNEL.

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Before you start

SAFETY PRECAUTIONS

After removing any housing parts and electronic assemblies it is possible to get access to live parts. It is essential to ensure that the subsequent safety rules are strictly observed:

• Servicing of electronic equipment must be performed by qualified personnel only.

• Before removing covers the equipment has to be switched off and the mains cable unplugged.

• When the equipment is open the power supply capacitors have to be discharged by the help of a suitable resistor. During servicing unprotected and operating equipment:

- never touch bare wires or circuitry;

- use insulated tools only;

- never touch metal semiconductor cases because they may carry high voltages;

• For removing and installing electronic components, please follow the recommendations concerning the handling of MOS components.

ATTENTION:

DB4004 uses internal Lithium battery. Do not try to re-charge this battery!!! In case you have to change the battery, please contact us for detailed instructions and more information for the battery type.

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OPERATING ENVIRONMENT RECOMMENDATIONS

For the normal and reliable operation of the DB4004 device and reaching better measurements we recommend to follow the next list of instructions:

• Please, install the unit only in places with good air conditioning. The unit has been designed for operation within an ambient temperature range extending from 10 to 50°C. But because adjacent, less efficient equipment may radiate substantial second-hand heat, be sure that the equipment rack is adequately ventilated to keep its internal temperature below the specified maximum ambient temperature.

• We do not recommend installation in rooms with high humidity, dusty places or other aggressive conditions.

• Although it is expected that a DB4004 will be installed close to exciters (or transmitters of even higher-power!), please practice reasonable care and common sense in locating the unit away from abnormally high RF fields.

• Please, use only already checked power supply cables and sources. The shielded cables usage is strongly recommended.

• We strongly recommend connecting the device only to reliable power supply sources. In case of unstable power supply, please use UPS (Uninterruptible Power Supply).

• Please, use the device only with placed top cover to avoid any electromagnetic anomalies which may cause problems of the normal functionality of the unit.

• Please, connect DB4004 only to good quality Internet connection. This is very important for the normal remote operation of the unit.

• Please, check if your network settings pass through all the data traffic required for the normal operation of the DB4004 unit.

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INSTALLATION SPECIFICATIONS AND PRECAUTIONS

REGARDING THE RF ENVIRONMENT.

ANTENNA CONSIDERATION.

Attentively observing of the RF Environment, in which DB4004 is disposed and is functioning, is necessary for ensuring of the normal and reliable working of the system. Best conditions in accordance with the standards listed below must be provided for functioning of the system.

Depending on the application, the DB4004 monitoring receiver can be installed very close to high power FM transmitters. Usually its antenna port is directly connected to any FM transmitter monitor output or to directional coupler on the output of any combiner system. The typical RF output level of such sources is too high for the normal operation of the DB4004 receiver. We strongly recommend using external RF attenuators with attenuation value between 20 – 90dB for reaching optimal RF output level in the 55-60 dBµV range.

Using external antenna is required when the DB4004 receiver is used for off air monitoring too far from any transmitters or transmitter site. Very important step in such case is selecting the proper outdoor FM antenna, antenna location and direction. The three most popular antenna types are: omni directional, unidirectional dipole and directional multi-element array antenna.

The omni directional Antenna is not a good choice for using with DB4004, because of the low antenna gain, the very bad signal to noise ratio (compared to any directional antenna) and its high multipath interferences reception.

The other type antennas: unidirectional dipole and directional multi-element array antenna have some directivity and antenna gain. These factors make these antennas much proper for your needs.

We recommend the usage of factory made antenna or antenna system, manufactured especially for the FM Radio Band 88 – 108 MHz.

After selecting the antenna type that will meet your needs, the next step is the installation of the antenna. You must follow several important principles:

- Install the antenna far enough from any walls, roofs, buildings or any transmitting equipment;

- The minimum spacing between the antenna and the closest object must be more than 3 meters.

One DB4004 monitoring receiver is usually used for the monitoring of one transmitter site, transmitting more than one program. In such cases the best antenna that can be used is a directional antenna directed exactly to this site.

If you would like to monitor more than one transmitter site, we recommend using antenna system with separate antennas for each of the monitored directions.

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CONNECTING AC POWER AND VOLTAGE SELECTION

Before connecting the AC Power, make certain that the internal Power Switch and the fuse rating are in accordance with the mains supply at your location.

ATTENTION:

DB4004 Power Supply Factory Settings are:

- 100 - 240 VAC

- 1 Amp Fuse

CAUTION:

Permanent damage will result if improper AC supply voltage is applied to the

DB4004 device. Your warranty does not cover damages caused by applying improper supply voltage, or use of an improper fuse.

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Panel Indicators, Switches and Connectors

FRONT PANEL – LEFT AND RIGHT AREAS

The DB4004 front panel can be provisionally divided into two main areas – Left Area and Right

Area. A brief description of controls and switches, indicators and displays located in both areas is

given below. For detailed information please refer to “Operation” on page 18.

Left Area

At the extreme left is located the Phones connector. Next to them are the sub areas of

FM

MODULATION METERING and AUDIO DEMOD METERING with the appropriate SELECT buttons and LED indicators. Both areas contain 60 segments LED bargraphs. The upper one is used to indicate the Total Deviation, the Positive or Negative deviations divided each other and the

Pilot signal as well. The lower bargraphs are used to show the demodulated audio according to the mode selected by the

SELECT button on the left of them.

Right Area

OLED Display

– signals received by DB4004 can be viewed and analyzed by the built-in OLED display. This is the display to visualize all the measurements of the received signal and show the various DB4004 settings.

Soft Buttons

– used to navigate through the menus, quickly access the parameters, modes and functions and to alter their values. Their functions vary in accordance with the selected menu. On the bottom side of the OLED display are located Soft Buttons indicators and they alter their meaning following the function currently selected by the Soft Buttons. Pressing of a Soft Button, causes a visual effect of pressing the appropriate button on the OLED Screen. Soft Buttons will be referred as SB1

(leftmost one), SB2, SB3 and SB4 (rightmost one) further in this manual.

Navigational Buttons

–

UP and DOWN, LEFT and RIGHT and OK buttons are used for frequency selection and similarly to the

Soft Buttons to navigate through the menus selecting various functions and parameters of the DB4004.

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REAR PANEL

10 9 8

14

11

12

13

1. Mains connector, 110-240VAC, IEC-320 C14 type;

2. Fuseholder – 1A;

3. Audio Left Output - XLR;

4. Audio Right Output - XLR;

5. Audio AES/EBU Output - XLR;

6. Audio SPDIF Output - RCA;

7. Audio Optical Output - TOSLINK

8. MPX Output - BNC;

9. RF Input 1 (Antenna 1) - BNC;

10. RF Input 2 (Antenna 2) - BNC;

11. Ethernet T-BASE10/100 RJ45;

12. USB – type B;

13. GSM Modem – Male D-Sub 15 pins High Density;

14. GPO – Optoisolated, Female D-Sub 15 pins;

7

6

5 3 4

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REAR PANEL ALARM TERMINAL

8 7 6 5 4 3 2 1

15 14 13 12 11 10 9

1 - GPO1 Collector

2 - GPO2 Collector

3 - GPO3 Collector

4 - GPO4 Collector

5 - GPO5 Collector

6 - GPO6 Collector

7 - GPO7 Collector

8 - GND

9 - GPO1 Emitter

10 - GPO2 Emitter

11 - GPO3 Emitter

12 - GPO4 Emitter

13 - GPO5 Emitter

14 - GPO6 Emitter

15 - GPO7 Emitter

1

GPO1

9

LOAD

1

GPO1

9

LOAD

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Operation

A WORD ABOUT MEASUREMENT LIMITATIONS

Signal Strength

Signal strength is a major factor when a signal is measured and evaluated. FM as compared to the AM is a much less susceptible to the inherent noise in radio reception.

On the other side speaking about FM broadcasting, it is the monaural reception which can tolerate and profit from a much narrower IF bandwidth. Stereo reception adds all the noise present in the 23 – 53 KHz sub-band. Moreover it is the amplitude component (AM) of this sub band that is converted down to audible noise to be added to the program signal. That is why the noise performance of FM-stereo can be as much as 20 dB worse than that of monaural broadcast.

As a general rule better reception and measurement can be obtained by using highly directional outdoors antenna. Such antenna besides improving the signal strength, will contribute in eliminating the multipath distortion.

A bargraph indicator used in DB4004 allows measuring the strength of the signal being received, where the rule “the more the better” is in force. To reach this indicator, activate

LEVELS menu.

Multipath Distortion

In FM reception, regardless of overall signal strength, a very important consideration is that obstacles, (which an FM signal may encounter in the line-of-sight path) tend to reflect and disperse the signal in many directions. In many locations, especially in urban areas where many tall buildings interfere with the direct transmitted signal or in suburban areas surrounded by hills or mountains, an FM receiver may pick up a station’s primary signal but, also, several secondary reflections coming from various directions. These reflections arrive at the receiver out-of-phase, slightly delayed in time with the primary signal and tend to blur or distort the principal signal. The degree of distortion depends on the number and relative strength of the reflections.

The result, known as multipath distortion in FM reception can range from a low-level fuzziness to a severely distorted sound quality, particularly at the high frequencies or treble. Multipath distortion is especially troublesome in FM stereo reception.

DB4004 incorporates a multipath distortion detector and multipath bargraph indicator to show the multipath level of received signal. The so mentioned multipath bargraph can be reached under the

LEVELS menu.

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Co-channel Interference

In many populated areas, there just isn’t much room in the radio spectrum and stations will be jam-packed in. Another thing which would result in mutual interference between the broadcasting stations is poor frequency planning.

The inherent broad bandwidth of the DB4004 receiver is vulnerable from stations working on the nearby frequencies, where signal strength will be the most important factor – the stronger the interfering station, the stronger the interference effect.

One method to identify adjacent channel interference is to observe independent positive and negative deviation readings. If the positive deviation is considerably higher then the negative one, interference from a strong station above the monitored frequency would be indicated and vice–versa. In this example the negative deviation can probably be trusted as an indication of total carrier modulation, though this should be confirmed in free of interference RF environment.

In any event program deviation should be fairly symmetrical about the carrier frequency. Using the built-in Attenuator can be of some help, but using of an outdoors directional antenna could dramatically improve the situation with unwanted adjacent working stations. Other solutions include a band-pass filter at the primary frequency or a trap at the interfering frequency.

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FIRST TIME POWER ON

In this chapter we will try to give you a brief guidance on starting and initial setup up of

DB4004. By this you will get initial understanding of procedures and measurements in daily use of DB4004.

For the beginning the items needed are a pair of headphones and a connection to an outside antenna. Considerations in the choice of antenna are described in details previously in this manual

(see “Installation Specifications and Precautions regarding the RF Environment. Antenna

Consideration.” on page 13).

Assuming that the Mains voltage at your location is in permitted range of 110-240 VAC, you can plug in the power cord free end into the wall socket. Now turn the

POWER switch ON.

NOTE:

The DB4004 powers-up to the last selected frequency. This frequency, along with some of the settings and parameters will be held by the DB4004’s non-volatile memory and used on switching on of DB4004.

Plug the headphones into the front panel jack

PHONES and using the LEFT< or RIGHT>

Navigational Buttons start tuning in. Find a strong local station that even with a short wire antenna could be clearly heard on the phones. If needed try repositioning the antenna in order to improve reception.

Regardless of the previous selections, both deviations (Positive and Negative) will be selected upon DB4004 powering on and both

POS DEV and NEG DEV LED indicators of FM

MODULATING METERING will be lighted. Although the SELECT button enables independent monitoring of positive and negative deviation, the DB4004 is in the default mode when both the

POS DEV and NEG DEV indicators are lighted. Unless there is a reason for doing otherwise the

FM MODULATION METERING display should be kept in the default mode for the most exact measurement of the station’s carrier deviation.

The above are just the very first, basic steps in DB4004 operation. Detailed explanation of tuning, setting up and measurement procedures are given in the next chapters.

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FRONT PANEL – READOUT SECTION (LEFT SIDE)

Phones

Phones jack to monitor the received signal. Headphones volume can be menu adjusted by going to Settings > Audio / MPX Outputs > Phones Volume.

Bargraphs and LED Indicators, Select Buttons

FM MODULATING METERING

– 60 segments LED bargraph indicator to visualize the highest Positive or Negative deviation or both of them (default) as selected by the

SELECT button. It is peak-responding, and it updatesand-holds the highest peak. When both the

POS DEV and NEG DEV indicators are lighted, the highest deviation in either polarity is shown and this is the default display mode.

SELECT button also switches the bargraph to display the injection level of 19 kHz stereo pilot signal, which is usually set to 7-8 kHz injection. Stereo

PILOT signal is read on the lower metering scale. It is calibrated in appropriately smaller scale then the carrier deviation.

SELECT Button

– used to change mode of the LED bargraph indicators and associated LED indicators. Possible selections are

POS DEV, NEG DEV, POS DEV + NEG DEV, PILOT.

AUDIO DEMOD METERING

– two 60 segments LED bargraphs showing

Left and Right or L+R and L-R demodulated audio.

By default the

AUDIO DEMOD METERING displays left- and right channels of the stereo pair with the

L / R indicator lighted. It is recommendable leaving this display in the default mode. The

SELECT button can be used to switch the AUDIO DEMOD METERING display between L / R and

L+R / L-R. Upon selecting any of the L / R or L+R / L-R the relevant indicator will light, but the headphones will continue monitoring the

L / R stereo program.

Although there are instances where the

L+R and L-R bargraphs may be close in value, as a rule of thumb, the

L-R meter should generally lag the L+R meter by at least a few dB, i.e. the L+R sum will always have more energy than the

L-R difference and this applies to nearly all recorded music.

For signals where voice announcements are predominant, without background music or for other mono sources the

L-R indication may drop almost off-scale.

The

SELECT button associated with the above described bargraphs, cycles amongst various options, each of them identified with an associated LED indicator.

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L, R, L+R, L–R

– LED indicators associated with

AUDIO DEMOD METERING scales and indicating currently selected mode.

LOSS

– indicating that the audio of the Left and/or Right stereo channel is lost. DB4004 can detect program audio loss and alarm is initiated whenever any of the Left or Right channels of the stereo pair drops below selected threshold for certain time. The

LOSS detection threshold level and time can be adjusted from Settings > Device > Loss menu.

This function is not affected by the

SELECT button.

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FRONT PANEL - LCD DISPLAY, NAVIGATIONAL & SOFT

BUTTONS (RIGHT SIDE)

Display

The DB4004’s OLED display has three function areas: Header, Soft Buttons and Main Screen

Working area.

OLED Display with its function areas

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Header Area

Header is located on the left quarter of the screen. Depending on contents of working area the header may contains the following items:

- Frequency Indicator showing the currently selected frequency is located in the upper left corner. Frequency’s resolution is 0.01 MHz;

- Currently selected active Antenna Input.

ANT 1 – signal being processed is the one from the Antenna 1 Input. ANT 2 – input from

Antenna 2 Input;

- Attenuator Indicator – showing the currently selected position of the active

Antenna Input. Attenuator’s position can be set manually by the operator or automatically be the

DB4004.

- Indicator for Stereophonic Information contained in the received signal and currently selected de-emphasis time constant.

- Indicator for RDS information contained in the received signal.

- Decoded

PS information from RDS signal;

- Indicator to show the signal level at selected antenna input;

- Indicator to show the phones audio level;

- Indicator to show currently selected IF band-pass filter bandwidth;

Having three different de-emphasis selections, the question arises which one to select? As well known, one of the problems with the high quality VHF FM transmissions is that the increased audio bandwidth means that background noise can often be perceived. It is particularly noticeable towards the treble end of the audio spectrum, where it can be heard as a background hiss. To overcome this it is possible to increase the level of the treble frequencies at the transmitter. At the receiver they are correspondingly attenuated to restore the balance. This also has the effect of reducing the treble background hiss which is generated in the receiver. The process of increasing the treble signals is called pre-emphasis, and reducing the treble signals in the receiver is called de-emphasis. The rate of pre-emphasis and de-emphasis is expressed as a time constant. It is the time constant of the capacitor-resistor network used to give the required level of change. In the

UK, Europe and Australia the time constant is 50µs whereas in North America it is 75µs.

So it can be selected depending on the region you are located or to completely disable this feature.

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Soft Buttons

Soft buttons are located on the bottom side of the OLED Display making possible direct transition from some of the pages to another page. In such cases the inscription of a specified

Soft Button corresponds to the page it is linked with. Most of the pages have the same or similar functionality distinctive segments (areas). Pressing of a specified Soft button causes a visual effect of pressing the appropriate

Soft button on the OLED Display. Function, Menu Page, Parameter to be changed, etc., that are linked to a specified Soft button will appear as inscription on the button.

Example:

- discard changes being made;

- applying stored preset frequency;

- HOME PAGE will be selected;

- return to previous page;

- alternating low threshold button;

NOTE:

On some pages the

Header and Soft button area may be hidden.

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Main Screen Working Area

The Main part of the OLED Screen is the place where the information changes dynamically, depending on the selected working mode. The

Menu Screen (shown below) appears after a short pressing of the “OK” Navigational Button. The DB4004’s

Menu Page contains selectable icons and software buttons for selecting modes and functionalities of this device. Pressing

Left and Right arrow buttons changes icon selection of the

Menu Page. An icon is selected when it receiver the rectangle focus frame around it. Short pressing of the “OK” button on selected icon will make a transition to corresponding page. On figure below the Bandscan icon is selected.

The following Operating Modes and Pages can be selected using the Navigational Buttons:

- Home page

- Bandscan page

- FFT page

- Scope page

- Stereo page

- Settings page

- Graphs page

- Levels page

- Status page

- About page

- RDS Decoder page

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OPERATING MODES AND PAGES

Home Page

Immediately after power-up and boot process of DB4004, the

Home page is shown on the display. Transition to

Home page can be made from any page where

Soft

Button is available. There is several Home page views available which can be altered through

Settings>Device>Home Screen

menu.

On the default

home screen the Header area is shown (see “Header Area” on page 24). Shown

are also the most important flags attributes of the decoded RDS signal (if present) and big indicator of currently selected frequency. Pressing any of the

Soft Buttons will set to the appropriate preset.

“Preset” explained

PRESET is a pre-saved set of parameters for instant automatic recall later on.

Creating a new Preset

Navigate to page of the DB4004 in which

Soft Buttons are assigned to Preset. In such page the labels of the soft buttons are

FM Frequencies (e.g. Home page). Select desired frequency by the Navigational Buttons and press hold

Soft Button for about 2 seconds until two short beeps are heard from DB4004. A new

Preset was created with parameters corresponding to those at the time of creation –

FREQUENCY, ATT, ANTENNA PORT. The newly created Preset is assigned to the

Soft Button and Preset frequency is shown as button label.

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Bandscan Page

Select

Bandscan icon from Menu page and short press OK button on it. The transition to

Bandscan page will be made.

The data from last bandscan since DB4004 power-up will be shown on the display.

If there is no data from previous bandscan the empty grid will be displayed.

Since more space for data plot is needed the

Header area is not shown on that page. The labels of the

Soft buttons are hidden automatically short time after soft button is released. There is three control states in

Bandscan page – Span control, Marker control and Parameter control. The states can be identified by the labels of the Soft buttons. If the labels appears as shown on the figure below that mean the page is in

Marker control state.

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Short pressing SB3 once will make the transition from

Marker to Span control state and Soft

button labels will be changed accordingly.

The controls state of the page will be changed alternatively between

Marker and Span on every

SB3 press.

Short pressing OK button in either

Marker or Span control states will make a transition to

Parameter control state. The page will stay in that state until OK button is pressed again or a timeout of 2 seconds is elapsed (whichever occurs first). Simplified state diagram of the control states transitions is shown on figure below.

2 sec timeout

Span control state

OK press

SB3 press

Parameter control state

OK press

Marker control state

2 sec timeout

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Span control state:

In this state SB1, SB2 and

Arrow buttons controls span of the data plot. The following is description of button assignments in span control state:

(SB1) cycles through available span values for X axis of the data plot. Possible values are between 3 and 21 MHz in 1 MHz increments. Note that changing X span may also change the center frequency to keep data plot in bounds. On each key press next span value is selected and displayed briefly on the screen.

5MHz X span is selected

(SB1) cycles through available span values for Y axis of the data plot. Possible values are 30, 60, 90, and 120 dBµV. Note that changing Y span may also change the Y reference to keep data plot in bounds. On each key press newly selected value is displayed briefly on the screen.

120 dBµV Y span is selected

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Left / Right Buttons – changes center frequency of the data plot on 500 kHz increments.

Permitted values for center frequency depends from currently selected X span. Selected value for

center frequency

is briefly displayed on the screen.

95 MHz center frequency is selected

Up / Down Buttons – changes Y axis reference (the value for the bottom of the Y scale). Permitted values are from -20 dBµV in 10 dBµV increments. The upper limit of Y reference depends from currently selected Y span. Selected Y reference is briefly displayed on the screen.

10 dBµV reference is selected.

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Marker control state:

Up to two markers, named “A” and “B” are available in

Bandscan page. SB1, SB2, Left and

Right buttons controls the visibility and position of the Markers.

Button assignments:

(SB1) / (SB2) controls

Marker A / Marker B appearance. There is three states of each marker:

• hidden – marker is not visible;

• shown – marker is visible but is not selected;

• selected – marker is visible and selected.

For markers in visible state (shown or selected) a readout for X and Y axes appear on the left side of the data plot. If both markers are visible the differential “

Marker B – Marker A” values become available at the bottom left.

Selected marker is drawn with highlighted dashed line, the marker readout is highlighted also. There can be only one selected marker at the time. If only one marker is visible it is always selected.

Marker A is shown, Marker B is selected

The logic of transition between these states is explained in following diagram:

Marker is hidden

SB1 or SB2 press

Marker is selected

SB1 or SB2 press

Marker is shown

Left / Right Buttons – move selected marker to the left / right with one screen pixel increment.

NOTE:

The step resolution of marker movement depends from selected X span.

Up / Down Buttons – just like in

Span control state Up and Down buttons us used to change the

Y reference.

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Parameter control state:

Parameter control state allows specific parameters to be set before starting the bandscan.

Button assignments:

Left / Right Buttons – cycles through available parameters.

Up / Down Buttons – changes the value of selected parameter.

The name and the value of the selected parameter

appears briefly over the data plot.

NOTE:

Upon leaving

Parameter control state the readout for selected parameter will disappear from the screen. This occurs on OK press or after 2 seconds timeout if no button is pressed.

Following is the list and short description of available parameters from

Bandscan page.

Bandscan : Start / Stop – Used for starting or stopping of the bandscan process. Setting the value of this parameter to “Start” will start the bandscan process. During bandscan the LED bargraphs are turned to stylized box-shaped progress indicator. The information for bandscan

progress is also shown on right bottom corner of data plot.

After bandscan completion the value of the Bandscan parameter is set to “Stop” automatically.

Bandscan in progress

Running bandscan can be stopped by setting the value of Bandscan parameter to “Stop”.

Start Frequency: 87.00 – 108.00 MHz – set the start frequency of the bandscan.

End Frequency: 87.00 – 108.00 MHz – set the end frequency of the bandscan.

Step:10, 20, 50, 100 kHz – set the step increments for the band. Smaller step leads to more

“fine” bandscan but is slower;

RF Input: Antenna 1/Antenna 2 – select the antenna input to be used during bandscan;

Pressing SB4 in

Bandscan page will transition to previous page.

NOTE:

Leaving the page will not stop running bandscan. The bandscan will continue until it is finished or the value of Bandscan parameter is set to “Stop”.

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FFT Page

Select

FFT icon from Menu page and short press OK button on it. The transition to FFT page will be made. As name of the page shows, spectral components of the selected signal are determined on the base of Fast Fourier Transform.

The data from last selected FFT source signal since DB4004 power-up will be shown on the display.

FFT with MPX selected as signal source

The control states of

FFT page are identical to the controls states of Bandscan page (see “Span

control state” on page 30, “Marker control state” on page 32 , “Parameter control state” on page 33). The

X Span, Y Span, Center Frequency, Y Reference and Markers can be changed in similar way.

Each signal source has dedicated set of X Span, Y Span, Center Frequency and Y Reference setting.

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There are several parameters available in

Parameter control state from FFT page.

– determine the source signal for FFT calculation. Four possible values are available –

RF, MPX, Left and Right. The name of the selected signal source is overlayed at right bottom corner of the data plot.

– select active antenna input of DB4004.

– sets the Window Function to calculate the FFT. The possible values of the parameter are:

Rectangle, Barlett, Blackman, Hamming, von Hann and Flat-

top. More information regarding Window Function utilizing can be found on http://zone.ni.com/ devzone/cda/tut/p/id/4844;

– indicates buffer numbers taken into account in calculation and obtaining the average signal. The possible values of the parameter are: 1 (no average), 5, 10,

20, 50, Infinite

– sets the frequency at which the DB4004 is tuned.

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Scope Page

Select

Scope icon from Menu page and short press OK button on it. The transition to Scope

page will be made. Scope mode is used to visualize the most important signals participating in the process of demodulating and stereo decoding. This mode represents the observed signal change over time. In order to maximize the plot area, the

Header and Soft buttons labels are hidden.

The data from last selected Scope source signal since DB4004 power-up will be shown on the display.

Scope with RDS selected as signal source

The display appearance and control states of

Scope page are identical to the controls states of

Bandscan page (see “Span control state” on page 30, “Marker control state” on page 32 , “Parameter control state” on page 33). The X Span, Y Span, Center Frequency, Y Reference and Markers

can be changed in similar way. Each signal source has dedicated set of X Span, Y Span, Center

Frequency and Y Reference setting.

Available parameters in scope page:

– Determine the source signal for scope plot. Possible sources are –

RF, MPX, Left, Right, Pilot, RDS, Sub and Main. The name of the selected signal

source is overlayed at right bottom corner of the data plot.

– Select active antenna input of DB4004.

– Sets the frequency at which the DB4004 is tuned.

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Measure Stereo page

Select

Stereo icon from Menu page and short press OK button on it. The transition to Measure

Stereo page will be made.

The graphical representation of the phase relations between

Left and Right audio channels is illustrated above. This graphic is used to assess mono compatibility of the audio material as well as visualizing the stereo image or balance of the material. Experienced users of this type of display can easily detect the differences between mono signals, “pan-pot” stereo and true stereo signals.

The audio levels for both left and right channels are given in kHz.

Button assignments:

OK – Transition to

Main menu.

Left/Right – Sets current frequency.

Up/Down – Increases/decreases Phones audio level..

SB1-SB4 – Fast

Presets.

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Graphs page

Select

Graphs icon from Menu page and short press OK button on it. The transition to Graphs

page will be made.

Graph page represents the value deviation of measured parameters in time. The X axis of the data plot area is elapsed time in seconds. New peak value sample is added to data graph on every

125 ms (20 seconds for

MPX power). Up to 20 seconds of measurement history is available for each parameter. The most recent moment in time is on the right side of the graph. The name and the unit for Y axis of currently measured parameter is displayed on top left corner of data plot. On the right side of the display a bargraph indicator is used to display momentary value of selected parameter. The low and high limits of measured range are also available in shaded color.

Graph history of RF level

Graph history of MPX Power – time span is in minutes

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Button assignments:


Main menu page.

Left/Right – Changes current frequency.

Up/Down – Changes currently displayed parameter history. Following parameters are available for observation:

• RF Level – from -10 to 110 in dBµV;

• Multipath level from 0 to 50 in % (percent);

• Total MPX deviation from 0 to 125 in kHz;

• MPX power from -12 to 12 in dBr. Due to 20 second integration of MPX power calculation the time span for

MPX power graph is in minutes. Up to 48 minutes of MPX power history is available;

• Pilot level from 0 to 15 in kHz;

• RDS level from 0 to 15 in kHz;

• Left + Right (Main) level from -60 to 10 in dB;

• Left - Right (Sub) level from -60 to 10 in dB;

• Left audio level from -60 to 10 in dB;

• Right audio level from -60 to 10 in dB;

• Frequency offset of the RF carrier from -50 to 50 in kHz;

• Temperature in the device from -10 to 90°C;

SB1-SB4 – Fast

Presets.

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Levels page

Select

Level icon from Menu page and short press OK button on it. The transition to Levels page will be made.

Levels page shows bargraph representation of different parameters, measured by DB4004. The parameters are shown in groups by four. Each bargraph displays averaged momentary value in highlighted color number, minimum and maximum peak values. Shaded color number found on the left and right bottom edges denotes the measurement range of the parameter. The name and measurement unit of the parameter is shown above corresponding bargraph.

Group 1. This group shows RF carrier related parameters

RF level in dBµV at the selected antenna input. The attenuator position is taken into account in level calculation;

Frequency offset of the RF carrier in kHz. With this parameter the misalignment between the modulation and demodulation frequency can be measured. As the misalignment is expected to be small, a large offset indicates disturbance (for example adjacent channel breakthrough).

Frequency offset is measured with better accuracy if there is no modulation of the carrier. The usable range depends of selected

IF filter bandwidth. For best result set IF filter

bandwidth to 153 kHz (manual).

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Level of multipath reception in percent. The multipath detector measures amplitude fluctuations of the signal. An FM signal is broadcast with a fixed level. Therefore level fluctuations indicate degraded signal quality. At multipath conditions large level fluctuations can be measured. For best measurement accuracy try to find reception point with lowest multipath level.

Shows currently selected

IF filter bandwidth.

Group 2. This group shows Stereo multiplex related parameters

These two bargraphs shows the

deviation from positive and negative component of

MPX signal. In wideband FM, used in wireless broadcasting, the instantaneous frequency varies above and below the frequency of the carrier with no modulation.

When the instantaneous input wave has positive polarity, the carrier frequency shifts in one direction; when the instantaneous input wave has negative polarity, the carrier frequency shifts in the opposite direction. At every instant in time, the extent of carrier-frequency shift (the deviation) is directly proportional to the extent to which the signal amplitude is positive or negative.

Mod Input FM Output

Shows the deviation caused by

Pilot tone injection. As good practice the pilot deviation should be about 10% from total deviation of the RF carrier.

Same for RDS signal.

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Group 3. This group shows Audio related levels

Group 4. This group shows reception quality related levels

Ultrasonic Noise bargraph (lower is better). To give an indication about the

Ultrasonic Noise the amplitude of the high frequency content of the MPX signal is measured. This is measured in the bandwidth of approximately 80 kHz up to 150 kHz.

Stereo Blend bargraph (higher is better). In stereo signals, the difference (L-

R) component of the

MPX signal is more susceptible to disturbances than the sum (L+R) signal.

Therefore, the separation of the left and right audio channels can be reduced in order to reduce the audibility of the disturbance. This reduction of channel separation is called “stereo blending”.

The level of stereo blending is depends on the following input signals:

Signal Level, Multipath,

Ultrasonic Noise and Pilot tone deviation.

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High Cut bargraph. Most of the effect of disturbances is present in the higher audio frequencies. Therefore, a means of reducing the effect of disturbances is to filter the higher frequencies. This reduction of audio bandwidth is called “high cut”. The level of applied

High Cut depends on the following input signals: Signal Level, Multipath, Ultrasonic Noise.

5000 10000 15000 20000

-2

-8

-10

-4

-6

-12

Response of the FM High Cut function for several reduction values

Soft Mute bargraph (lower is better). If disturbances are present in the received signal, the perceived effect can be reduced by attenuating the audio signal. This reduction of audio volume is called “soft mute”.

Soft Mute depends on the following input signals: Signal

Level, Multipath and Ultrasonic Noise.

Button assignments:


Main menu page.


Up/Down – Changes currently displayed bargraph group 1-4.

SB1-SB4 – Fast

Presets.

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RDS decoder page

Short press SB3 from

Menu page. The transition to RDS decoder page will be made.

RDS page main view

RDS AF list view

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RDS Statistics view

RDS Group Sequence view

RDS Raw Data view

Button assignments:


Main menu page.


Up/Down – Changes currently displayed

RDS page view.

SB1-SB4 – Fast

Presets.

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Settings page

Select

Settings icon from Menu page and short press OK button on it. The transition to Settings

page will be made.

The device settings are organized as hierarchical tree menu (

Settings menu). Similar parameters are grouped in sections (branches). The overall view of the

Settings menu is shown on the figure below.

“Tuner” section (branch) from the root Settings menu is selected

“Frequency” parameter from “Tuner” branch is selected

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There is several areas in the

Settings menu screen:

–

Settings menu title – shown the path to currently selected menu item. Note that parameter name has to be considered in the context of settings menu title. For example Settings>Tuner - Frequency is different from

Settings>Logger>Channel 1 – Frequency

.

–

Navigation area – the selection of certain branches / parameters is made here. The selected item is drawn in highlighted color. The names of the branches or parameters are listed oh the right side of the navigation area. The value of the parameter is shown on the right – against the parameter name. Since branches have no values associated with them the tree dots are shown instead. This indicates a sublevel branch or parameter.

Button assignments:

OK – Acts differently depending on current selection. If selection is:

• Menu branch – the transition to selected branch is made and the branch items are listed in navigation area;

• Menu parameter – the value of that parameter is highlighted and edit mode is entered;

• Menu complex parameter (such as Alarm) – the parameter editor is shown and edit mode is activated;

Up/Down – If edit mode is active – changes the value of the selected parameter. Otherwise will move selection in corresponding direction up/down.

Left/Right – Changes selection within parameter value in edit mode. See examples below.

SB4 – Back one level or cancel menu mode.

There is several parameter types available in DB4004. The way of editing depends of that type.

Following is description of parameter types. Every parameter has several properties, change step, unit, default value, permitted range for its value and so on.

Numerical parameter (INT). Represents numerical value.

Example: The value of the frequency can be changed in 87.00 to 108.00 MHz range with step of 10, 20, 50 or 100 kHz;

Button assignments for INT in edit mode:

OK – Accept the value and exits edit mode.

Up/Down – Changes the value of the parameter with one step increment/decrement. The value always stays in permitted parameter range.

SB4 – Discards the value and cancels edit mode.

Enumerated parameter (ENUM). Represent selection of one value from set of predefined enumerated values.

Example:

“

OFF”, “-10dB” , “-20dB” and “-30dB” position.

The value can be changed between “

Auto”,

Button assignments for ENUM in edit mode:


Up/Down – Cycles through possible value positions. The value always stays in permited parameter range.

SB4 – Discards the value and cancels edit mode.

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IP address (IP). Represents IPv4 address.

Example:

Button assignments for IP in edit mode:

,


Up/Down – Cycles through possible values for selected (highlighted background) segment of

IP address. The value always stays in permitted parameter range.

Left/Right – Selects previous/next segment from the

IP address.

SB4 – Discards altered value and cancels edit mode.

IP port (PORT). Represents IP port.

Example:

Button assignments for

IP port in edit mode:

See

IP address description.

String (STR). Represents string.

Example:

Button assignments for STR in edit mode:

• OK – Accept the value and exits edit mode. Note that certain String, like e-mail addresses, are validated prior acceptation. If validation fails the message box is displayed and edit mode is not left after message box confirmation. For example:

OK press

OK press

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• Up/Down – Cycles through possible values for selected (highlighted background) string

character. There is certain limitation in permitted charset depending from string context.

For example for

phone number string only “1234567890+” and white space characters are available.

• Left/Right – Selects previous/next character from the string. If Right button is pressed with the last character selected the new space character is added automatically at the end of the

string.

. On Left button press the trailing spaces are removed automatically.

• SB2 – Inserts white space before selected character.

– before SB2 press;

• SB3 – Deletes selected character.

– after SB2 press;

– before SB3 press;

– after SB3 press.

• SB4 – Discards altered value and cancels edit mode.

Date (DATE). Represent date information.

Example:

Button assignments for DATE in edit mode:


Up/Down – Cycles through possible values for selected (highlighted background) segment of parameter value. The value always stays in permitted parameter range.

Left/Right – Selects previous/next segment from the parameter value.

SB4 – Discards altered value and cancels edit mode.

Time (TIME). Represent time information.

Example:

Button assignments for TIME in edit mode:

See

DATE description.

Timer (TIMER). Represents relative time interval.

Example:

Button assignments for TIMER in edit mode:


Up/Down – Increments/decrements value with one step. The unit of the value changes automatically from seconds to minutes and vice-versa.

SB4 – Discards altered value and cancels edit mode.

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Alarm (ALARM). Alarm is special complex parameter with its own editor dialog. Each alarm parameter are composed from several sub-parameters. These are:

• Low threshold. This is lower alarm limit for measured signal. If the value stays below this limit for certain time “low alarm” event will be generated.

• High threshold. This is higher alarm limit for measured signal. If the value stays above this limit for certain time “high alarm” event will be generated.

• Trigger time. Time to wait before “low alarm” or “high alarm” event is generated.

• Release time. Time to wait before “idle alarm” event is generated.

• Set of notification channels. Denotes the way the user is notified for the alarm event.

Possible channels are: SMS (with GSM modem option), E-mail, SMNP and GPO.

Example:

Content of alarm editor dialog with

RF Alarm shown. The bargraph shows whole signal range of the

alarm. The highlighted area denotes permitted signal region. If current signal value (pos. 4) falls in this region no alarm event will be generated. The basic elemets are:

1. Lower limit of the alarm range.

2. Low threshold value.

3. Value unit.

4. Current value of the signal.

5. High threshold.

6. Higher limit of the alarm range.

Button assignments for ALARM in edit dialog:

OK – Accept the value and exits edit dialog.

Up/Down – Changes the value of selected (highlighted) sub-parameter. The value always stays in permitted parameter range. Low threshold value cannot exceed the high threshold value and vice-versa.

Left/Right – Selects previous/next sub-parameter of the

alarm.

SB2 – Toggles ON/OFF low alarm event generation.

SB3 – Toggles ON/OFF high alarm event generation.

SB4 – Discards altered sub-parameter values and cancels edit mode.

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Channel (CHANNEL). This is complex parameters which combines several sub-parameters together. (CHANNEL) represents the settings for one

logger channel:

• Name – channel name for convenience (STR).

• Frequency – channel frequency (INT).

• Active – enables/disables this channel (ENUM).

• Acquisition time – this long logger will stay and measure on that channel (TIMER).

• RF Alarm – alarm settings for RF level (ALARM).

• MPX Alarm – alarm settings for MPX total modulation (ALARM).

• MPX Power Alarm – alarm settings for MPX power (ALARM).

• Pilot Alarm – alarm settings for Pilot tone deviation (ALARM).

• RDS Power Alarm – alarm settings for RDS subcarrier deviation (ALARM).

• RDS Group Alarm – alarm settings for RDS group presence (ALARM).

• Left Alarm – alarm settings for Left audio signal level (ALARM).

• Right Alarm – alarm settings for Right audio signal level (ALARM).

Example:

Channel 1 settings

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Parameter Name

Tuner

Frequency

RF Input

Attenuator Ant 1

Attenuator Ant 2

Frequency Step

IF Bandwidth

Stereo Blend

High Cut

High Blend

Soft Mute

Audio Cut

Deemphasis

RDS Mode

Average and Peak

Attack Time

Release Time

Peak Hold

Communication

General Setup

Ethernet

SNMP

Application

HTTP

Type

INT

ENUM

ENUM

ENUM

ENUM

ENUM

ENUM

ENUM

ENUM

ENUM

ENUM

ENUM

ENUM

INT

INT

INT

ENUM

ENUM

ENUM

ENUM


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List of DB4004 settings

Range

87 … 108, step 0.05

Antenna 1, Antenna 2

Auto, OFF, -10, -20, -30

Auto, OFF, -10, -20, -30

Default value [, Unit] Description

Tuner related submenu

98, MHz

Antenna 1

Auto, dB

Auto, dB

10, 20, 50, 100 50, kHz

27, 36, 45, 53, 62, 71, 79, 88, 97, 105, 114, 123,

131, 140, 149, 157, Auto

Auto, kHz

Auto, Off Auto

Currently set frequency

Active RF antenna input

Attenuator setting for antenna input 1

Attenuator setting for antenna input 2

Step for frequency tuning

IF filter bandwidth

Auto, Off

Auto, Off

Auto, Off

5, 10, 15, Off

FLAT, 50, 75

RDS, RBDS

Auto

Auto

Auto

Off, kHz

50, µs

RDS

Stereo blend control

High cut control

High blend control

Soft mute control

Audio cut control

De-emphasis settings

RDS decoder mode

0 … 500, step 10

50 … 1000, step 10

500 … 5000, step 500

Enable, Disable

Enable, Disable

Enable, Disable

Enable, Disable

50, ms

500, ms

1500, ms

Enable

Enable

Enable

Enable

Signal averaging related submenu

Attack time for signal measuring

Release time for signal measuring

Peak hold time

Communication related submenu

General communication settings

Ethernet port (general)

SNMP protocol

Application proprietary protocol

HTTP protocol (WEB server)

- 52 -

Parameter Name

FTP

Email

SNTP

Audio Stream

Syslog

USB

UPnP

Ethernet

DHCP

IP

Network Mask

Gateway

Primary DNS

Secondary DNS

WAN IP

SNMP

Manager IP

Manager Port

Agent Port

Agent ID

Read Community

Write Community

Session Timeout

Application

Port

Session Timeout

IP

PORT

PORT

INT

STR

STR

TIMER

PORT

TIMER

Type

ENUM

ENUM

ENUM

ENUM

ENUM

ENUM

ENUM

Range

Enable, Disable

Enable, Disable

Enable, Disable

Enable, Disable

Enable, Disable

Enable, Disable

Enable, Disable

IP

IP

IP

IP

ENUM

IP

NETMASK

Enable, Disable

1 … 65535, step 1

1 … 65535, step 1

0 … 255, step 1

10 … 3600, step 10

1 … 65535, step 1

10 … 3600, step 10

- 53 -


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Enable

Enable

FTP protocol

SMTP protocol (email)

Enable

Enable

Enable

Enable

Enable

SNTP protocol (Internet time)

Audio streaming

SYSLOG protocol

USB port

Enable

192.168.1.2

255.255.255.0

UPnP protocol

Ethernet related submenu

DHCP Client

IP address (static)

Network mask (static)

192.168.1.1

192.168.1.1

192.168.1.1

192.168.1.2

192.168.1.1

162

161

0

DEVA4004

DEVA4004

180, sec

1024

180, sec

Gateway address (static)

Primasy DNS IP address (static)

Secondary DNS IP address (static)

IP address used for FTP behind NAT

SNMP related submenu

Manager IP address

Manager port

Agent port

Agent ID for the device

Read community password

Write community password

Inactivity timeout - for SNMP write only

Application related submenu

Application port

Application inactivity timeout

Parameter Name

HTTP

Port

Session Timeout

FTP

Data Port

Command Port

SNTP

Time Server

Server Port

Email

Mail Server

Server Port

Email Address 1

Email Address 2

Sender Name

User Name

User Password

Streamer

Server Port

Bitrate

Syslog

Server

Port

GSM Modem

Modem Type

Baudrate

PORT

INT

HOST

PORT

ENUM

ENUM

Type

PORT

TIMER

PORT

PORT

HOST

PORT

HOST

PORT

EMAIL

EMAIL

STR

STR

STR

Range

1 … 65535, step 1

10 … 3600, step 10

1 … 65535, step 1

1 … 65535, step 1

1 … 65535, step 1

1 … 65535, step 1

1 … 65535, step 1

64 … 128, step 32

1 … 65535, step 1

Generic

4800, 9600, 19200, 38400, 57600

- 54 -


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80

180, sec

HTTP related submenu

WEB server port

WEB session timeout

FTP related submenu

2020

21 pool.ntp.org

123

FTP data port

FTP command port

SNTP related submenu

Time server host name

Time server port

Email related submenu

Outgoing server host name mail.host.bg

25

(blank)

Outgoing server port

First recepient email address

Second recepient email address (blank) db4004@ devamonitoring.com

(blank)

(blank)

Sender name

Outgoing server user name

Outgoing server password

Audio streamer related submenu

5000

128, kbps

514

Generic

9600, bps

Audio streamer server port

Audio bitrate

SYSLOG related submenu

Server host name

Server port

GSM modem related submenu

Denotes used GSM modem type

GSM modem communication speed

Parameter Name

Number 1

Number 2

Number 3

Number 4

Number 5

Security

Panel

Access Control

Access Code

Access Timeout

Remote Access

Admin Name

Admin Password

User Name

User Password

Alarms

Alarm Events

Email

SMS

SNMP Trap

GPO

Alarms GPO

GPO1 Type

GPO1 Pulse Time

GPO2 Type

GPO2 Pulse Time

GPO3 Type

Type

TEL

TEL

TEL

TEL

TEL

ENUM

PORT

TIMER

STR

STR

STR

STR

ENUM

ENUM

ENUM

ENUM

ENUM

TIMER

ENUM

TIMER

ENUM


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Range

Enable, Disable

0 … 9999, step 1

60 … 3600, step 1

Enable, Disable

Enable, Disable

Enable, Disable

Enable, Disable


(blank)

(blank)

First allowed phone number

Second allowed phone number

(blank)

(blank)

(blank)

Third allowed phone number

Fourth allowed phone number

Fifth allowed phone number

Security related submenu

Disable

1234

300, sec

Panel security settings

Front panel access control

Front panel access code

Access is granted timeout

Remote control security settings admin pass user pass

Enable

Enable

Enable

Enable

Level High, Level Low, Pulse High, Pulse Low Level High

1 … 120, step 1 2, sec


1 … 120, step 1 2, sec


Admin access level name

Admin access level password

User access level name

User access level password

Alarms related submenu

Alarm events control settings

Alarm through email

Alarm through SMS

Alarm through SNMP trap

Alarm through GPO pin

GPO pins settings

GPO pin 1 active level

GPO pin 1 pulse duration




- 55 -


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Parameter Name

GPO3 Pulse Time

GPO4 Type

GPO4 Pulse Time

GPO5 Type

GPO5 Pulse Time

GPO6 Type

GPO6 Pulse Time

GPO7 Type

GPO7 Pulse Time

RF Alarm

MPX Alarm

MPX Power Alarm

Pilot Alarm

RDS Alarm

RDS Group Alarm

Left Alarm

Right Alarm

Temperature Alarm

Fan Speed Alarm

Type

TIMER

ENUM

TIMER

ENUM

TIMER

ENUM

TIMER

ENUM

TIMER

ALARM

ALARM

ALARM

ALARM

ALARM

ALARM

ALARM

ALARM

ALARM

ALARM

Range Default value [, Unit] Description

1 … 120, step 1 2, sec




1 … 120, step 1 2, sec


1 … 120, step 1 2, sec






1 … 120, step 1


1 … 120, step 1

see “Note 1” see “Note 1” see “Note 1” see “Note 1” see “Note 1” see “Note 1” see “Note 1” see “Note 1” see “Note 1” see “Note 1”

Logger

Logger Mode

Channel 1

….

ENUM Disable, 1, 2, 5, 10

CHANNEL see “Note 2”

….

….

Channel 50

Audio / MPX Outputs

CHANNEL see “Note 2”

Phones Volume

Audio Volume

INT

INT

-60 … 0, step 1

-60 … 6, step 1

2, sec

2, sec

Disable, min

….

-12, dB

0, dB




RF level alarm settings

MPX total deviation alarm settings

MPX power alarm settings

Pilot level alarm settings

RDS subcarrier level alarm settings

RDS group presence alarm settings

Left audio level alarm settings

Right audio level alarm settings

Device temperature alarm settings

Device fan speed alarm settings

Logger related submenu

Logger mode start time delay

Settings for logger channel 1

….

Settings for logger channel 50

Audio / MPX output related submenu

Head phones audio level

Audio output level

- 56 -

Parameter Name

MPX Volume

GSM Volume

Digital Out

Device

Alias

Date / Time

Date

Time

Timezone

Front Panel

Display Brightness

Display Contrast

LED Brightness

Screen Saver

Panel Timeout

Loss

Threshold

Timeout

Home Screen

Fan Control

Factory Defaults

Apply to

Execute

Type

INT

INT

ENUM

STR

DATE

TIME

TZONE

INT

INT

INT

ENUM

TIMER

INT

TIMER

INT

ENUM

ENUM

ENUM

Range

-60 … 4, step 1

-60 … 0, step 1

Enable, Disable

01-Jan-2012 … 31-Dec-2100

0:0:0 … 23:59:59, step 1

-12:00 … 14:00, step 30 min

0 … 100, step 10

0 … 100, step 10

0 … 100, step 10

Disable, 1, 2, 5, 10

10 … 600, step 10

-100 … 0, step 1

1 … 60, step 1

0 … 3, step 1

Auto, 25, 50, 75, 100

None, Channels, Retain Comm, All

Done, Proceed


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0, dB

0, dB

Disable

MPX output level

GSM audio level

Digital audio output control

Device related submenu

DB4004 dd-mm-yyyy hh:mm:ss hh:mm

Alias name for device

Date / Time settings

Manual set Date

Manual set Time

Timezone

Front panel settings

Display brightness 50, %

100, %

60, %

2, min

10, sec

Display contrast

LED bars brightness

Screen saver control

Panel inactivity timeout

-50, dB

1, sec

1

Auto, %

None

Done

Audio loss LED settings

Active threshold level

LED activation delay

Select Device’s home screen

Fan speed control

Factory defaults settings

Selects parameter group to apply defaults

Revert defaults to selected parameter group

- 57 -


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NOTE 1:

Default values for complex alarm parameters are as follows:

Range Parameter Name

For all Alarms

Trigger

Release

SMS

Email

SMNP

GPO

RF Alarm

Low threshold

High threshold

MPX Alarm

Low threshold

High threshold

MPXPWR Alarm

Low threshold

High threshold

Pilot Alarm

Low threshold

High threshold

RDS Alarm

Type

INT

INT

INT

INT

INT

INT

INT

INT

Low threshold

High threshold

Left Alarm and Right Alarm

INT

INT

Low threshold

High threshold

INT

INT

TIMER

TIMER

ENUM

ENUM

ENUM

ENUM

1 … 600, step 1

1 … 600, step 1

ON, OFF

ON, OFF

ON, OFF

1, 2, 3, 4, 5, 6, 7, OFF

20 … (High threshold)

(Low threshold) … 100



-12 … (High threshold)






-50 … (High threshold)


- 58 -

Default value [,Unit]

300, sec

300, sec

OFF

OFF

OFF

OFF

25, dBµV

75, dBµV

30, kHz

75, kHz

-8, dBr

6, dBr

4, kHz

8, kHz

2.5, kHz

6.5, kHz

-40, dB

0, dB

Description

Alarm active event delay

Alarm idle event delay

SMS notification control

Email notification control

SNMP notification control

GPO pin assignment control

Low alarm trigger level

High alarm trigger level












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Parameter Name

Temperature Alarm

Low threshold

High threshold

Fan Alarm

Low threshold

High threshold

RDS Group Alarm

Group selector

Type

INT

INT

INT

INT

Range





All groups deselected

NOTE 2:

Default values for complex channel parameters are as follows:

Parameter Name

Logger channel 1 … 50

Name

Frequency

Active

Acquisition Time

RF Alarm

MPX Alarm

MPX Power Alarm

Pilot Alarm

RDS Alarm

RDS Group Alarm

Left Alarm

Right Alarm

Type

STR

INT

ENUM

TIMER

ALARM

ALARM

ALARM

ALARM

ALARM

ALARM

ALARM

ALARM

Range

Name

87 … 108, step 0.05

Disable, Enable

5 … 120, step 1


20, °C

70, °C

800, rpm

5000, rpm


Channel name

98, MHz

Disable

10, sec

see “Note 1” see “Note 1” see “Note 1” see “Note 1” see “Note 1” see “Note 1” see “Note 1” see “Note 1”

Description





RDS Group selector

Description

Channel frequency

Channel activity control

Channel acquisition time

RF level alarm settings

MPX modulation alarm settings

MPX power alarm settings

Pilot level alarm settings

RDS level alarm settings

RDS groups alarm settings

Left audio level alarm settings

Right audio level alarm settings

- 59 -


Tel: +359 56 820027, Fax: +359 56 836700


WARRANTY TERMS AND CONDITIONS

I. TERMS OF SALE: DEVA Broadcast Ltd. products are sold with an understanding of “full

satisfaction”; that is, full credit or refund will be issued for products sold as new if returned to the point of purchase within 30 days following their receipt, provided that they are returned complete and in an “as received” condition.

II. CONDITIONS OF WARRANTY: The following terms apply unless amended in writing

by DEVA Broadcast Ltd.

A. The Warranty Registration Card supplied with this product must be completed and returned

to DEVA Broadcast Ltd. within 10 days of delivery.

B. This Warranty applies only to products sold “as new.” It is extended only to the original end-

user and may not be transferred or assigned without prior written approval by DEVA Broadcast Ltd.

C. This Warranty does not apply to damage caused by improper mains settings and/or power

supply.

D. This Warranty does not apply to damage caused by misuse, abuse, accident or neglect. This

Warranty is voided by unauthorized attempts at repair or modification, or if the serial identification label has been removed or altered.

III. TERMS OF WARRANTY: DEVA Broadcast Ltd. products are warranted to be free from

defects in materials and workmanship.

A. Any discrepancies noted within TWO YEARS of the date of delivery will be repaired

free of charge, or the equipment will be replaced with a new or remanufactured product at

DEVA Broadcast Ltd. option.

B. Parts and labor for factory repair required after the one-year Warranty period will be billed

at prevailing prices and rates.

IV. RETURNING GOODS FOR FACTORY REPAIR:

A. Equipment will not be accepted for Warranty or other repair without a Return Authorization

(RA) number issued by DEVA Broadcast Ltd. prior to its return. An RA number may be obtained by calling the factory. The number should be prominently marked on the outside of the shipping carton.

B. Equipment must be shipped prepaid to DEVA Broadcast Ltd.. Shipping charges will be

reimbursed for valid Warranty claims. Damage sustained as a result of improper packing for return to the factory is not covered under terms of the Warranty and may occasion additional charges.

- 60 -


Tel: +359 56 820027, Fax: +359 56 836700


PRODUCT REGISTRATION CARD

• All fields are required, or warranty registration is invalid and void

Your Company Name

Contact

Address Line 1

Address Line 2

City

State/Province ZIP/Postal Code

Country

E-mail Phone

Which DEVA Broadcast Ltd. product did you purchase?

Fax

Product Serial #

Purchase date / / Installation date / /

Your signature*

*Signing this warranty registration form you are stating that all the information provided to DEVA Broadcast Ltd. are truth and correct.

DEVA Broadcast Ltd. declines any responsibility for the provided information that could result in an immediate loss of warranty for the above specified product(s).

Privacy statement: DEVA Broadcast Ltd. will not share the personal information you provide on this card with any other parties.

- 61 -

DB4004 User Manual

MAINTENANCE AND OPERATION

INSTRUCTION MANUAL

DSP-based FM Radio Monitoring Receiver with TCP/IP Connectivity

Contents

THIS PAGE

IS INTENTIONALLY

LEFT BLANK

Introduction

General Information

Product Features

TECHNICAL SPECIFICATIONS

RF INPUT

FM DEMOD

STEREO DECODER

RDS DECODER

FFT SPECTRUM ANALYSIS (RF, COMPOSITE, AUDIO)

SCOPE ANALYSIS (RF, COMPOSITE, AUDIO)

METERING ACCURACY

OUTPUTS

COMMUNICATION INTERFACES

MEASUREMENT STORAGE

POWER

SIZE AND WEIGHT

BLOCK DIAGRAM

NO USER-SERVICEABLE COMPONENTS INSIDE.

REFER ALL SERVICING TO

QUALIFIED TECHNICAL PERSONNEL.

Before you start

SAFETY PRECAUTIONS

OPERATING ENVIRONMENT RECOMMENDATIONS

INSTALLATION SPECIFICATIONS AND PRECAUTIONS

REGARDING THE RF ENVIRONMENT.

ANTENNA CONSIDERATION.

CONNECTING AC POWER AND VOLTAGE SELECTION

Permanent damage will result if improper AC supply voltage is applied to the

Panel Indicators, Switches and Connectors

FRONT PANEL – LEFT AND RIGHT AREAS

Left Area

Right Area

REAR PANEL

REAR PANEL ALARM TERMINAL

Operation

A WORD ABOUT MEASUREMENT LIMITATIONS

Signal Strength

Multipath Distortion

Co-channel Interference

FIRST TIME POWER ON

FRONT PANEL – READOUT SECTION (LEFT SIDE)

Phones

Bargraphs and LED Indicators, Select Buttons

FRONT PANEL - LCD DISPLAY, NAVIGATIONAL & SOFT

BUTTONS (RIGHT SIDE)

Display

Header Area

Soft Buttons

Main Screen Working Area

OPERATING MODES AND PAGES

Home Page

Settings>Device>Home Screen

Bandscan Page

center frequency

Y reference.

FFT Page

X Span, Y Span, Center Frequency, Y Reference and Markers can be changed in similar way.

Scope Page

Frequency and Y Reference setting.

source is overlayed at right bottom corner of the data plot.

Measure Stereo page

Graphs page

Levels page

RDS decoder page

Settings page

Settings>Logger>Channel 1 – Frequency

List of DB4004 settings

WARRANTY TERMS AND CONDITIONS

I. TERMS OF SALE: DEVA Broadcast Ltd. products are sold with an understanding of “full

II. CONDITIONS OF WARRANTY: The following terms apply unless amended in writing

A. The Warranty Registration Card supplied with this product must be completed and returned

B. This Warranty applies only to products sold “as new.” It is extended only to the original end-