AOR SDU5600 Operating Manual
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AOR SDU5600 Operating Manual

AOR SDU5600 Operating Manual

Professional spectrum display unit for use with a companion radio
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FFT spectrum display unit
SDU5600
PROFESSIONAL SPECTRUM
DISPLAY UNIT FOR USE WITH
A COMPANION RADIO
OPERATING MANUAL
1

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Summary of Contents for AOR SDU5600

  • Page 1 ® FFT spectrum display unit SDU5600 PROFESSIONAL SPECTRUM DISPLAY UNIT FOR USE WITH A COMPANION RADIO OPERATING MANUAL...

  • Page 3: Table Of Contents

    4.4 Clear (CLR) key ..................4.5 Default mode and clear mode ..............4.6 When the communication with the companion receiver has failed ..... 5 Configuration of the SDU5600 ..............5.1.1 Configuration (CONF) ................5.1.2 Applicable receivers ................5.2.1 Configuration of the receiver ..............
  • Page 4 5.10 Factory default/reset ................6 Operating the SDU5600 ................6.1 Operate the SDU5600 with the AR5000A+3 ..........6.2 Monitor the VHF FM band in the spectrum analyser mode ......6.3 Monitor the FM broadcast band in the step resolution mode .....

  • Page 5: Safety Notices

    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.

  • Page 6: Sdu5600 Brief Circuit Description

    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.

  • Page 7: Block Diagram

    Block diagram...

  • Page 8: Introduction

    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.

  • Page 9: Controls And Descriptions

    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...

  • Page 10: Rear Panel

    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:...

  • Page 11: Connection

    Section 2, 2-1, 2-2 2 Connection 2-1 Connection with the power supply Where possible, use the supplied AC/DC power unit. Make sure the main switch of the SDU5600 is in the OFF position before connecting the power supply. 2-2 Connection with the receiver This hand book is compiled mainly referring to the AR5000A series receiver as the principal companion receiver.

  • Page 12: Preparations

    Then switch on the SDU5600 by depressing the POWER switch on the lower left of the front panel. The SDU5600 will power up, while the operating system powers up you may notice horizontal lines on the LCD, this is normal. The SDU5600 will briefly display the model number and firmware version called the ‘opening message’...

  • Page 13: Basics

    The SDU5600 is configurable in various ways to the requirements of the operator. All configuration data is stored into FLASH ROM when the SDU5600 is switch off. However, in the event of failed connection / communications with the companion receiver, a beep will be sounded and the SDU5600 will revert to the...

  • Page 14: Display

    Section 4-2 4-2 Display This section explains what you can expect to see on the SDU5600’s monitor screen using Spectrum Mode as a typical example. The screen will appear differently when switched to other operating modes. (1) Centre frequency - CF: The centre frequency reading is shown in MHz, providing a minimum resolution of up to 10Hz.

  • Page 15: Main Key Layout

    Section 4-2, 4-3 (6) Step frequency - STEP: This value is displayed in kHz and indicates how wide one step represents out of the 320 steps across the X-axis. The example of page 14 shows 31.250kHz as one step which is obtained by taking the SPAN of 10MHz and dividing it by 320, the result is 31.250kHz - since the X-axis is 10MHz wide in this example.

  • Page 16: Clear (Clr) Key

    4-5 Default mode and clear mode The SDU5600 is configurable with a wide range of parameters. It is possible to bring the SDU5600 to the default mode as described in the table by repeatedly pressing the clear key.

  • Page 17: Configuration Of The Sdu5600

    Section 5, 5-1-1 5. Configuration of the SDU5600 The SDU5600 is designed to configure a wide range of parameters for ease of operation. 5-1-1 Configuration (CONF) This section explains how to configure the operating environment under which the SDU5600 is used.

  • Page 18: Applicable Receivers

    Section 5-1-2 5-1-2 Applicable receivers This is a list of compatible receivers which are selectable from the SDU5600 companion receiver menu: Receiver Selection menu Applicable receiver Remarks AR5000 AR5000/+3 Use of EXT-IF port AR5000A/+3 AR3000A AR3000A 10.7MHz IF mods required...

  • Page 19: Configuration Of The Receiver

    The amount of attenuation is determined by the attenuator of the companion receiver. With the AR5000 series receiver the attenuation can be manually selected from the receiver’ front panel. However when the attenuator is switched on from the SDU5600’s front panel it will select only the AUTO position of the receiver.

  • Page 20: Selecting The Receive Frequency

    This is also true when communication between the SDU5600 and the companion receiver has been disrupted.
  • Page 21 ENT three times to accept the current defaults. Use the SDU5600 main dial to select a peak on the display to indicate the presence of an active channel, press MK.F to receive the new frequency. As you move the main dial again, you will note that a new yellow-outline marker appears at the current position on the display, this is the receive marker.

  • Page 22: Setup Of The Monitoring Mode

    Section 5-3 5-3 Setup of the monitoring mode The SDU5600 is designed to provide 3 different monitoring modes such as the spectrum analyser mode, step resolution mode and channel scope mode. Choosing the most appropriate monitoring mode for your specific requirements is important to maximise performance and efficiency of the SDU5600.

  • Page 23: Basic Setup For Each Monitoring Mode

    This hardware special key is a duplicate of the soft key CENTRE FREQ. and has identical action. Either key may be used to the same effect. Enter key MHz/kHz SDU5600 has TWO ENTER KEYS, either may be used to complete key sequences. When inputting frequencies, you may use kHz or MHz format. For example, ten-MegaHertz may be entered as: 1 0 MHz...

  • Page 24: Step Resolution Mode

    Note: If you select a step size which is too large, the SDU5600 will default to 31.250kHz step with span of 10MHz... and will produce an error beep (if the beep facility is enabled). If you select a step size which is too small, the SDU5600 will default to 0.500kHz step with span of 0.160MHz...

  • Page 25: Channel Scope Mode

    Receive frequency (RX.FREQ) When the channel scope mode is activated, monitoring begins on the start frequency. Rotate the main dial of the SDU5600 to move the marker onto the signal of your interest, and press the MK.F key. The yellow receive marker moves to the nominated position and the companion receiver monitors the wanted frequency.

  • Page 26: Common Features Shared By Different Monitoring

    The plot on top was produced with the input sensitivity of -30dBm, the input sensitivity is too high, which results in unstable operation within the RF amplifier of the SDU5600. This has produced some ghost signals (images) separated at regular intervals.
  • Page 27 Section 5-4-4 Resolution band width (RBW) The SDU5600 provides four selectable RBW bandwidths which are 4kHz, 32kHz, 64kHz and 128kHz. Press the RBW key to make the RBW display appear in reverse contrast. Rotate the main dial to select the desired value followed by MHz or kHz to complete the selection sequence.

  • Page 28: Marker

    Section 5-5 5-5 Marker The SDU5600 has a marker facility. The marker is often used to obtain the reading of the frequency of interest. In addition to the instantaneous reading, it provides the peak detection and continuous peak detection. Press FUNC + MK.F to place the SDU5600 in to marker mode operation.
  • Page 29 Section 5-5 Continuous peak detection (C-Peak) This facility is designed to continue the peak signal detection process one sweep after another. Press the C-Peak key to activate the facility. There is no trigger level setup in the process. To return to the instantaneous reading either from the peak detection mode or continuous peak detection mode press the...

  • Page 30: Calculation Facility

    This facility enables the SDU5600 to produce a stable signal pattern even if each signal is fluctuating in signal strength.

  • Page 31: Waterfall Display Facility

    Section 5-7 5-7 Waterfall display facility The SDU5600 is equipped with a waterfall facility which can display the variation of signal strengths in conjunction with the time lapsed (as sweeps progress). Sixteen different colours are employed dependant on signal strength, in the shape of a waterfall.

  • Page 32: On/Off Of The Display Information

    To toggle the keypad confirmation beep on / off, use the key sequence FUNC + 6 (BEEP). 5-10 Factory default/reset If you wish to revert the SDU5600 to default status, power-on the SDU5600 via the main power switch while holding-in the 3 and 6 keys together until the opening message EEPROM initialized is displayed.

  • Page 33: Operating The Sdu5600

    Section 6, 6-1 6. Operating the SDU5600 This section will provide examples of operating the SDU5600 using the AR5000A+3 as companion receiver. Refer to pages 10 to 12 of this manual for connection to the receiver. Access the conflagration menu 6-1 Operate the SDU5600 with the AR5000A+3.

  • Page 34: Monitor The Vhf Fm Band In The Spectrum Analyser Mode

    Section 6-2 6-2 Monitor the VHF FM band in the spectrum analyser mode Continue to operate the SDU5600 from section 6-1 where the SDU5600 / AR5000A+3 has been set in the spectrum monitoring mode. The example to the right is the actual...

  • Page 35: Monitor The Fm Broadcast Band In The Step Resolution Mode

    The following information explains how to change the monitoring mode from the default of spectrum analyser mode to the step resolution mode. Press the FUNC + 2 (STEP), the SDU5600 will shift to Step Resolution mode with the legend StepReso. appearing on the LCD. The display step will be unchanged at this stage.

  • Page 36: Monitor The Vhf Air Band In The Channel Scope Mode

    The VHF airband is allocated over the wide frequency band, It is therefore impossible to display the entire VHF airband on the SDU5600 at once. The channel scope mode however provides a very convenient method of monitoring the channelised frequency band through the use of both the marker and receive marker.

  • Page 37: Suitable Applications Of Each Monitoring Mode

    Section 6-5 6-5 Suitable applications of each monitoring mode A summary of the three monitoring modes and suitable applications is given here: Spectrum analyser mode This mode is the DEFAULT and most common monitoring mode among the three. It is suited to the monitoring of permanent or intermittent signals or noise.

  • Page 38: Useful Information

    Signal strength The signal strength which the SDU5600 indicates is measured at the RF input of the SDU (not the signal strength of the companion receiver at the antenna terminal). If the radio provides a gain / loss from the aerial input to IF output, the calibration of displayed signal strength will be affected.

  • Page 39: Sdu5600 Computer Control

    The SDU5600 and a PC should be connected using a straight cable between the [PC I/F] socket and the serial port of the PC. The SDU5600 port is MALE, so the PC lead must have a female connector or a gender changer will have to be employed.

  • Page 40: Basic Format Of The Command

    S = Spectrum analysis V = Visual command U = User Interface I = Information Microsoft Windows® Hyper Terminal® may be used to control the SDU5600 or you may write your own software. An example of command format is given here: RSCF<CR>...

  • Page 41: Spectrum Analysis

    Section 8-4 Spectrum analysis Command : WSCF Function : SET CENTER FREQUENCY Command category: WRITE Parameter : Min- Max (in MHz) Example : WSCF79.5<CR><LF> Response: if correct: <SP><CR><LF> if incorrect: ?<CR><LF> Remarks: Frequency entry for out of receive range will be respond by ?<CR><LF>, and the command will be ignored.
  • Page 42 Section 8-4 Command : WSTL Function : SET PEAK TRIGGER LEVEL Command category: WRITE Parameter : -90 ~ 0 Example : WSTL-80<CR><LF> Response: if correct: <SP><CR><LF> if incorrect: ?<CR><LF> Remarks: Data entry for out of range will be respond by ?<CR><LF>, and the command will be ignored.

  • Page 43: Visual Command

    Section 8-4 Visual command Command : WVPM Function : SET PLOT MODE Command category: WRITE Parameter : 1 ~ 2 Example : WVPM2<CR><LF> Response: if correct: <SP><CR><LF> if incorrect: ?<CR><LF> Remarks: Parameter: 1 = PAINT, 2 = OUTLINE Data entry for out of range will be respond by ?<CR><LF>, and the command will be ignored.

  • Page 44: User Interface

    ?<CR><LF> Remarks: Parameter: 1 = ON, 2 = OFF Data entry for out of range or the attenuator function is not supported by the associated receiver, the SDU5600 will respond by ?<CR><LF>, and the command will be ignored...
  • Page 45 Section 8-4 Command : WUMC Function : SET MARKER FREQ. AS RECEIVE FREQ. Command category: WRITE Parameter : N/A Example : WUMC<CR><LF> Response: if correct: <SP><CR><LF> if incorrect: ?<CR><LF> Remarks: This command is not available for the Other (10M) or Other (45M) receiver. Command : WUDS Function : MOVE MARKER POSITION Command category: WRITE Parameter : 1 ~ 2 Example : WUDS2<CR><LF>...

  • Page 46: General Information

    Parameter : N/A Example : RIGD<CR><LF> Response: see remarks Remarks: When this command is sent to the SDU5600, it will respond as follows producing a level whic corresponds to each frequency across the sceen. (Example): ========== Start from here ============ IGD<SP>CR><LF>...
  • Page 47 Section 8-4 Produces a ‘pair’ of data values comprising of frequency and its level at MHz order which is defined (sandwiched) by / /. In reality, there may be a discrepancy of +/- 1dBm between the value of the marker on the LCD and the level of the same marker which is calculated by this command. Command : RICD Function : CURSOR DOWNLOAD Command category: READ Parameter : N/A Example : RICD<CR><LF>...

  • Page 48: Notes For Programmers

    The array of frequency / level is faster in transfer time from the SDU5600 to the PC. The SDU5600 accepts commands either from the PC or from its own front panel on a first come first serve basis. For example the PC has sent data to switch the SPAN bandwidth to 10MHz followed by data from the front panel setting the same parameter to 5MHz.

  • Page 49: Specification

    9 Specification Input frequency 10.7MHz / 45.05MHz selectable Maximum frequency span 10MHz 4kHz, 32kHz, 64kHz, 128kHz Dynamic range 60dB Input impedance 50 OHM via BNC socket Display screen 5 inch (127mm) TFT Colour LCD Communications RS232C (2 ports) Power requirement 12DC @ 0.9A nominal, negative ground Operation 26 keys &...
  • Page 50 Notes:...
  • Page 52 2-6-4 Misuji, Taito-ku, Tokyo 111, Japan. Tel: +81 3 3865 1695 Fax: +81 3 3865 1697 post@aorja.com www.aorja.com AOR (UK) Ltd 4E East Mill, Bridgefoot, Belper, Derbys DE56 2UA, England Tel: +44 1773 880788 Fax: +44 1773 880780 info@aoruk.com www.aoruk.com AOR USA INC.,...

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