AOR SDU5600 Manuale utente

FFT spectrum display unit

SDU5600

OPERATING MANUAL

PROFESSIONAL SPECTRUM

DISPLAY UNIT FOR USE WITH

A COMPANION RADIO

Index

Safety notices ................................................................................................. 5

SDU5600 brief circuit description .................................................................... 6

LCD resolution ................................................................................................ 6

Block diagram ................................................................................................. 7

Introduction ..................................................................................................... 8

1 Controls and Descriptions ......................................................................... 9

1.1 Front panel ................................................................................................ 9

1.2 Rear panel ................................................................................................ 10

2 Connection ................................................................................................. 11

2.1 Connection with the power supply ............................................................. 11

2.2 Connection with the receiver ..................................................................... 11

3 Preparations ............................................................................................... 12

3.1 Configuration of the receiver ..................................................................... 12

3.2 Start-up ..................................................................................................... 12

4 Basics ......................................................................................................... 13

4.1 Control ...................................................................................................... 13

4.2 Display ...................................................................................................... 14

4.3 Main key layout ......................................................................................... 15

4.4 Clear (CLR) key ........................................................................................ 16

4.5 Default mode and clear mode ................................................................... 16

4.6 When the communication with the companion receiver has failed ............. 16

5 Configuration of the SDU5600 ................................................................... 17

5.1.1 Configuration (CONF) ............................................................................. 17

5.1.2 Applicable receivers ............................................................................... 18

5.2.1 Configuration of the receiver .................................................................. 19

5.2.2 Selecting the receive frequency .............................................................. 20

5.3 Setup of the monitoring mode ................................................................... 22

5.4 Basic setup for each monitoring mode ...................................................... 23

5.4.1 Spectrum analysers mode ...................................................................... 23

5.4.2 Step resolution mode ............................................................................. 24

5.4.3 Channel scope mode ............................................................................. 25

5.4.4 Common features shared by different monitoring ................................... 26

Index

5.5 Marker ...................................................................................................... 28

5.6 Calculation facility ..................................................................................... 30

5.7 Waterfall display facility ............................................................................. 31

5.8 On/off of the display information ............................................................... 32

5.9 Beep alert ................................................................................................. 32

5.10 Factory default/reset ............................................................................... 32

6 Operating the SDU5600 ............................................................................. 33

6.1 Operate the SDU5600 with the AR5000A+3 .............................................. 33

6.2 Monitor the VHF FM band in the spectrum analyser mode ........................ 34

6.3 Monitor the FM broadcast band in the step resolution mode ..................... 35

6.4 Monitor the VHF air band in the channel scope mode ............................... 36

6.5 Suitable applications of each monitoring mode ......................................... 37

7 Useful information ..................................................................................... 38

8 SDU5600 Computer control ....................................................................... 39

8.1 Communication parameters and connecting lead ...................................... 39

8.2 Delimiter ................................................................................................... 39

8.3 Basic format of the command ................................................................... 40

8.4 RS232 command list ................................................................................ 40

Spectrum analysis ............................................................................... 41

Visual command .................................................................................. 43

User interface ...................................................................................... 44

General information ............................................................................. 46

Notes for programmers ........................................................................ 48

9 Specification .............................................................................................. 49

Every effort has been made to make this manual correct and up to date. Due to continuous

development of the product and by error or omission, anomalies may be found and this is

acknowledged.

be copied or transferred by any means without the prior written consent of AOR Ltd. AOR and the ‘AOR

logo’ are trade marks of AOR Ltd. All other trade marks and names are acknowledged.

E&OE

&Level of risk

As there SDU5600 is powered from 12V DC, there is little chance of serious injury as long as common

sense is applied.

Observe the polarity of connections if the supplied AC power unit is not being used. DC input is a

nominal 12V DC wired centre positive. Reverse polarity connection will damage the SDU5600 and

potentially could lead to the risk of fire or explosion under severe circumstances.

Carefully handle the AC plug of the supplied AC power unit to prevent touching the terminals when

inserting or removing from the AC socket. NEVER connect the SDU5600 directly to the AC supply.

SAFETY NOTICE - Always disconnect the power supply from the AC socket when not in use.

Explanation of risk warning mark

Whenever the book symbol &is used in this operating manual, an important point is being made which

may relate to risk of personal injury or damage to the unit if ignored.

When the pointing finger is used, the associated text provides useful operational information of

special note (such as a tip). No risk or personal injury or damage is associated.

Handling the SDU5600

Use a soft, dry cloth to gently wipe the SDU5600 clean, never use abrasive cleaners or organic solvents

which may damage certain parts. Treat the unit with care, avoid spillage or leakage of liquids into the

cabinet and power supply. Special care should be taken to avoid liquid entering around the keys, main

dial or via the connection sockets.

Never push or knock the TFT LCD display screen which is very

fragile and sensitive to shock.

Special remarks

Do not use or leave the SDU5600 in direct sunlight (especially the TFT display). It is best to avoid

locations where excessive heat, humidity, dust and vibration are expected. Always keep the SDU5600

free from dust and moisture.

AC adaptor (power unit)

The SDU5600 may be provided with either a suitable AC / DC power unit. The SDU5600 is designed for

operation from a nominal 12V DC regulated power supply (12 to 14V is acceptable), which should be

capable of supplying a minimum of 1A continuous, ideally a 2A unit should be employed.

&Note: Never connect the SDU5600 directly to an AC supply.

The DC input socket uses a mini power connector (subject to EIAJ RC-5320A) and is wired centre

positive (+), the chassis of the unit is at negative ground. To minimise the potential for power cable

interference, it is suggested that a ferrite clamp be fitted to the connecting cable.

Other warnings

There are no internal operator adjustments. In the unlikely event of servicing being required, please

contact your dealer for technical assistance.

Should the SDU5600 appear to behave strangely, normal operation may easily be regained by resetting

the microprocessor. Simply power down the SDU5600 and disconnect the power supply... leave for 30

seconds then reconnect and power-up again.

It is possible to RESET the microprocessor, please refer to section 5-10, page 32 for further information.

If used with the AR3000A, a small modification is required to the receiver in order to provide the required

10.7 MHz IF output. If using the ICOM IC-R7100, the optional ICOM CT17 (RS232/CIV) interface is

required.

Safety notices

Circuit description

SDU5600 Brief circuit description

The RF signal is fed by BNC socket into the SDU at a selected frequency of either 10.7MHz or 45.05MHz depending on the radio IF

frequency being used. This signal is split into two different signal paths depending upon which input frequency is selected. Both paths

are buffered and have Band Pass Filters with a bandwidth of +/-5kHz to eliminate unwanted signals outside of this range.

After the BPF, both signal paths join and are amplified by a single LNA (Low Noise Amplifier). The output signal feeds a pair of Dual

BalancedMixers.

Here the input RF signal is mixed with two orthogonal sinusoidal signals produced by the DDS (Direct Digital Synthesis) section to

give two resultant signals at audio frequencies (one used as real, one as imaginary). The gain of both signal paths is also controlled at

this point.

The audio level signals are fed through 80kHz LPFs (Low Pass Filters) and finally converted from Analogue into Digital signals before

being fed to the FPGA (Field Programmable Gate Array).

The digital signal is now processed by the DSP (Digital Signal Processor) to give an RGB Video output via the FPGA which drives a

colour TFT LCD display.

The DSP is controlled by the main CPU and its EEPROM memory. The front panel keypad switches and rotary encoder are fed to the

main CPU via a separate slave microprocessor on the front panel.

RS232 control and Receiver control ports connect (indirectly) to the main CPU.

A comprehensive power supply section has been used in the unit to give the required supply levels of 2.5v, 3.3v, 5v, 6v, 9.5v, 17v, -5v,

-7v and -15v. The input is protected for reverse current & unwanted RF and is internally fused.

LCD resolution

The LCD provides high resolution of 320 horizontal dots from the left to right edges of screen. As a result, there are about 40 steps

per graticule division with eight divisions making up the total width. The minimum displayed bandwidth is 160kHz and the maximum

displayed width is 10000 kHz (10 MHz) representing ± 5 MHz.

To calculate the LCD-step, divide the SPAN bandwidth in kHz by 320. Examples are as follows:

10000 kHz (10 MHz) 32.250 kHz

5000 kHz (5 MHz) 15.625 kHz

2000 kHz (2 MHz) 6.250 kHz

1000 kHz (1 MHz) 3.250 kHz

160 kHz (0.16 MHz) 0.500 kHz

It is possible to force the LCD-step to equal the receive tuning step using a similar process. Multiply the receive tuning step size in

kHz by 320 (dots) to obtain the required total span width in kHz.

For example, for a 5 kHz tuning and LCD step, 5 x 320 = 1600 kHz span

The following table presents commonly used step sizes:

0.5 kHz (minimum step size) 160 kHz (0.160 MHz)

5 kHz 1600 kHz (1.600 MHz)

6.25 kHz 2000 kHz (2.00 MHz)

9 kHz 2880 kHz (2.880 MHz)

10 kHz 3200 kHz (3.200 MHz)

12.5 kHz 4000 kHz (4.000 MHz)

20 kHz 6400 kHz (6.400 MHz)

25 kHz 8000 kHz (8.000 MHz)

31.25 kHz represents maximum span of 10000 kHz (10 MHz)

Block diagram

Introduction

Thank you for purchasing the SDU5600 FFT spectrum display unit. AOR was the

first company in the world to market a colour spectrum display unit (SDU5000) for

professionals and the top-end of hobbyist listeners. The SDU5500 followed adding

sophistication and the SDU5600 is truly a successor incorporating a high resolution

5 inch (127mm) colour TFT display featuring FFT signal analysis and built-in waterfall

display backed by the latest microprocessor technology to ensure high versatility and

reliability. To get the best possible results, we recommended that you read this manual

to fully familiarise yourself with the SDU5600.

Major features

The SDU5600 has been designed to be a highly effective spectrum monitor unit which

is capable of digitally processing the IF frequency taken from a communications

receiver through the use of FFT for professional quality spectrum analysis. The 5 inch

TFT colour LCD screen is used to achieve the finest possible resolution.

The SDU5600 has been primarily designed to complement to the AOR AR5000 series

of receivers in terms of operational features and cosmetic design. Also other types of

receiver such as the AOR AR-ONE, AR3000A and AR8600MK2 and ICOM ICR8500 +

ICR7100 can be used (modification and additional hardware required).

A wide variety of monitoring modes are available with the convenience of operators in

mind which include Step Resolution Mode for general monitoring or Channel Scope

Mode for monitoring the channelised signals. It also incorporates a Waterfall facility

(as commercial grade spectrum analysers do), to display the changing conditions of

signal spectrum with varying colours in a form of waterfall.

Following the success of its predecessors, SDU5000 and SDU5500, the new

SDU5600 provides the same AV, Peak Hold and Peak value readings which are

downloadable to the PC via a communications port. The SDU5600 can be remote

controlled through the use of the communications port to further expand the range of

applications for spectrum monitoring.

Supplied accessories

1 x SDU5600 main unit

1 x BNC RF patch lead for IF connection

1 x DB9 patch lead for serial communications - male to male

1 x Handbook

1 x AC power supply

Introduction & preparation

1 Controls and Descriptions

Control and display of the SDU5600 is via the front panel with the rear panel

providing connections for the companion receiver, power and computer.

1-1 Front panel

LCD: Thelargehighresolution 5inch colourTFT displayprovides alloperational informationand

spectrumdisplay. Thebackground is black with green graticule and white lettering for critical

information. Menu items are varying shades of blue, the valid indicator is green with the function

indicatorin ‘reverselettering’ yellow. Themarker lineis whiteand changesto purplewhen exactly

positionedover a graticule line. The colours cannot be changed.

Power switch: Press once to latch the switch in, switching on the SDU5600. To switch off the

SDU5600, press the switch a second time, the switch latches outward. When switched on, the LCD

briefly displays the model and firmware numbers.

Tilt bail bar: A tilt bail bar is provided under the front panel (on the bottom case half) so that the

SDU5600may be tilted upward at the frontto improve visibility in certaininstallations.

Soft function keys: Each one of these three ‘soft keys’ has multiple roles as indicated on the LCD

screendepending on the circumstances inoperation.

Special function keys: These three keys positioned to the left of the DIAL are to be used solely for

specificpurposes suchas toenter acentre frequency, frequencyspan, displayincrement andinput

sensitivity.

Dial: The DIAL is a rotary control and is used to move the cursor, to make a selection or to move the

marker/centrefrequency.

Main keypad: Used to enter numeric information, to control the companion receiver, etc. When a

valid key press is sounded, the SDU5600 will provide a high pitch ‘beep’ (happy), if an invalid key

press is made, a low pitched ‘beep’ (sad) is sounded. The beep can be toggled on/off using the key

sequence FUNC + 6(BEEP), the default is on.

Section 1, 1-1

1-2 Rear panel

RF Input socket: The IF output (10.7 MHz / 45.05 MHz) from a suitable receiver such as the

AR5000A should be connected to this BNC input socket using a 50 OHM patch lead constructed of

quality coaxial cable such as RG58/U, UR43, UR76 etc. A suitable BNC-BNC lead is supplied.

PC I/F socket (male): A controlling computer may be connected to this 9-pin D-type male socket.

Ensure this socket is only commented to a computer for hands-off operation, although it is very

unlikely that incorrect connection to a computer or similar device would cause damage.

RX connection socket (female): The supplied 9-way to 9-way ‘D-type’ male to male lead is used to

connect the SDU5600 to the AR5000A receiver. If used with another receiver, a suitable serial-

adapter or connecting cable will be required. Wiring should be as follows:

SDU5600 9-pin male 9-pin male (AR5000A) 25-pin male (AR3000A)

223

332

5 5 7 GND

774

885

12V DC input socket: The supplied power unit is terminated with a centre positive (+) polarity.

Theplug specificationfollows EIAJRC-5320A (Class-4).

There are four screw holes (unused), two on each side of the cabinet.

They are a provision for rack mount application. Size of the screw is M4x8.

Section 1-2

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