AOR AR5000A, Operating Manual

Page 1: ... AR5000A TheNewHorizon wide band all mode receiver Operating manual ...

Page 2: ... CONFIG Frequency standard 32 7 Memory banks channels 33 7 1 Storing receive data into memory VFO mode 33 7 2 Memory recall Recalling receive data from memory 34 7 3 Transfer of memory channel to VFO 35 7 4 Changing and deleting memory data 35 7 5 Deleting memory channels and banks 36 8 SCAN scanning memory channels banks 37 8 1 SCAN outline introduction to facilities available 37 8 2 Starting to ...

Page 3: ...efore placing it into operation Every effort has been made to make this manual correct and up to date Due to continuous development of the receiver and by error or omissions anomalies may be found and this is acknowledged Most apparent faults are usually due to accidental misoperation of the receiver carefully read all of the manual before deciding to return the receiver for repair Although carefu...

Page 4: ...s to accept the new mode To select automode press and hold the key for more than one second the legend AUTO is displayed on the LCD to confirm operation AGC 6 9 Press When in automode the legend AUT is displayed AGC OFF AGC FAST AGC MIDDLE AGC SLOW Audio characteristics 6 11 Press A LPF 3 0 kHz A HPF 0 05 kHz DE EMP 750 CW PITCH 0 7 kHz AUDIO INT Option menu 6 12 6 13 15 2 16 2 Press DE SCR OFF if...

Page 5: ...matically select the appropriate mode and channel step Of course should you wish then both the mode and channel step may be manually changed as desired Wide variety of useful operational features High speed Cyber Scan and Cyber Search Multi VFO 5 VFO A minimum of 1 Hz tuning rate by NCO Frequency Offset facility to help follow duplex transmission RF preamp attenuator Auto aerial selection programm...

Page 6: ...et ACC 2 The aerials input selection may be programmed by the user for different bands at default these are ANT 1 50 OHM N type socket All frequencies ANT 2 50 OHM SO239 socket User selectable Aerial inter series adapters are readily available to convert from N type SO239 etc to BNC or other plugs sockets as required allowing straight forward connection to almost any aerial An aerial attenuator sy...

Page 7: ...hand side of the front panel Relative strength of incoming signal is indicated in standard S points where S1 is weak and S9 is strong Calibration above S9 is in dB up to 60dB As with other receivers the meter is for relative signal strength comparison and calibration may not be totally reliable especially on FM mode 5 3 Liquid Crystal Display LCD Display of operational information is provided via ...

Page 8: ...e receiver will switch off automatically very useful when listening to the radio in bed To program the sleep time press then press and hold for more than one second A sleep selection menu will be displayed use the MAIN DIAL or SUB DIAL to select the required time between 1 120 minutes then press To activate deactivate the SLEEP facility use the toggle sequence 8 PRIO indicates when the PRIORITY fa...

Page 9: ...GC off may be useful for DX ing when the optional 500 Hz Collins mechanical CW filter is fitted To ensure that the AGC is not switched off unintentionally two parallel bars are displayed between the MHz kHz LCD legends The available selection of AGC is OFF FAST MIDDLE SLOW 25 I F filter bandwidth is displayed on the LCD in kHz The options are 220 220 220 220 220 110 110 110 110 110 30 30 30 30 30 ...

Page 10: ...background noise is audible the squelch is referred to as being OPEN In a similar manner when the squelch control is rotated clockwise so that the background noise is muted the squelch is referred to as being CLOSED The squelch is not normally used when listening to short wave transmissions due to the relatively high short wave background noise the usual setting for the control when listening to s...

Page 11: ...ill be muted until an external audio signal is applied fed back in Of course the set s own audio may be fed out through the ACC 1 socket and back in again which increases the receivers flexibility under certain professional monitoring applications Note At high volume levels a low level leakage of internal audio signal may still be heard from the receiver s speaker this is normal and does not repre...

Page 12: ...other relevant information The first time you enter a frequency via the numeric keypad it is best to first press the key until VA VA VA VA VA is displayed to place the receiver in a known state of operation The condition of VFO A VFO B VFO etc is generally referred to as MANUAL MODE If the sequence is keyed additional parameters affecting VFO search operation may be configured DELAY L SQ VOICE SR ...

Page 13: ...may be used to select one of two clocks a second clock is often useful to store world time of a regular DX site The sequence then hold the key for more than one second activates the clock set menu where display of 12hr 24hr may be selected times set for both clocks and a three character text identifier added to each clock ALARM Figure EIGHT for the numeric input of frequencies bank channel numbers...

Page 14: ...MAIN DIAL are 0 001 kHz 1 Hz 0 010 kHz 10 Hz 0 050 kHz 50 Hz 0 100 kHz 100 Hz 0 500 kHz 500 Hz 1 000 kHz 5 000kHz 6 250 kHz 9 000 kHz 10 000 kHz 12 500 kHz 20 000 kHz 25 000 kHz 30 000 kHz 50 000 kHz 100 000 kHz and 500 000 kHz In addition unusual step sizes may be entered using the numeric keypad i e for 22 kHz or for 200 Hz The SUB DIAL may also be configured for MAIN same as MAIN DIAL x10 speed...

Page 15: ...ates the aerial selection menu The SUB DIAL is used to select input via either of the two rear panel aerial sockets ANT 1 for the N type input and ANT 2 for the SO239 Additional aerials may also be controlled via the optional AS5000 switching unit AUTO may be selected where the aerial will be automatically switched based upon the programming of frequency aerial data The sequence followed by the ke...

Page 16: ...ight positive You need not worry about this in normal use as the special plugs are pre wired and moulded onto the lead Note At no time must a c mains power 100 110 120 220 230 240V a c be connected directly to this socket or serious damage may occur including the risk of personal injury and fire 5 15 ACC 2 accessory 2 socket This 8 pin miniature socket is used for connection of an optional aerial ...

Page 17: ...et may be configured using the CONFIG menu to accept an external high stability 10 MHz reference such as off air atomic coupled In the standard configuration a built in 12 8 MHz TCXO is employed 5 20 MUTE This PHONO RCA socket is used to mute the AR5000 when used in conjunction with a transmitter to mute the AR5000 when placed into transmit The transmitter should provide a normally closed contact ...

Page 18: ...aces the receiver into a known state of operation ready to accept frequency input change of mode etc As with all modern microprocessor controlled equipment the AR5000 has enormous potential and capabilities Note The AR5000 uses an EEPROM Electronically Erasable Programmable Read Only Memory for storage of memories and other parameters A permanent storage EEPROM has the advantage of not requiring a...

Page 19: ...s of familiarisation When automode is active the legend AUTO is displayed above the right hand digit last one Hz of frequency readout If it is not displayed press and hold the key for more than one second the AUTO legend will appear on the LCD to confirm selection 6 4 Entering a frequency via the numeric keypad Select VFO mode and the desired VFO out of the five available VA VA VA VA VA VB VB VB V...

Page 20: ...mode bandplan information WHEN AUTOMODE IS ENGAGED To enable AUTOMODE press and hold the key for more than one second the AUTO legend will appear on the LCD above the right hand last digit of the frequency readout to confirm selection Most known step sizes are available with the exceptions such as TV channels which are allocated with 6MHz or 4MHz spacing There will be occasions when you may wish t...

Page 21: ...provides a powerful feature to enable accurate following of unusual bandplans When active the STEP ADJ legend is displayed in the centre of the LCD Step adjust is used when the receiving frequency is not divisible by the step size in use It is possible that step adjust has been programmed into the automode bandplan data for some world market areas Therefore step adjust is useful for certain bandpl...

Page 22: ... tune the receiver in 14 kHz steps with the trailing offset maintained The SUB DIAL tunes the receiver in 14 kHz steps but clears the offset to a round number i e zero Note You may review the step adjust value quite simply While in VFO mode press followed by to access the step adjust sub menu In the above example the step adjust value will be 2 0 kHz refer to the following text for the mathematica...

Page 23: ... 3 Enter the offset frequency via the numeric keypad in MHz i e for 600 kHz press The LCD will return to VFO MEMORY SCAN or SEARCH mode whichever was previously in use 4 If editing a previously stored offset frequency it is possible to select whether the offset should be up or down from the displayed frequency If the frequency entered was new simply re enter the setup mode by pressing then holding...

Page 24: ...C VD VD VD VD VD VE VE VE VE VE can hold different modes it is suggested that one be left on AUTOMODE for general tuning and others set to specific modes for specialist listening applications Remember To reinstate automode press and hold the key for more than one second Although any receive mode may be selected at any frequency within the receiver s frequency coverage generally speaking the follow...

Page 25: ...ion of automated stations The AR5000 has the provision for the operator to select the frequency offset used by the receiver in CW mode using the AF SET menu Note about AGC Automatic Gain Control If the AGC is not set appropriately audio will sound distorted The key sequence activates the AGC menu In FM mode the options are AGC ON OFF and in other modes are OFF FAST MIDDLE and SLOW When AGC OFF has...

Page 26: ...move hiss making listening for extended periods easier on the ears There are four available cut off frequencies 3 0 kHz 4 0kHz 6 0kHz 12 0 kHz The lower the frequency the more limited the audio bandwidth for highest fidelity for Band II listening select 12 0 kHz If the filter selection has been left to automode the legend AUT AUT AUT AUT AUT will be displayed The audio low pass filter will initial...

Page 27: ...orse code is usually centred around a tone of 700 to 800 Hz The audio stage of the AR5000 is configured to emphasise this window however the centre frequency may be changed to suit personal preferences or specific requirements This function is valid only when CW mode is used for reception The selectable range pitch is as follows 0 4 kHz 400 Hz 0 5 kHz 500 Hz 0 6 kHz 600 Hz 0 7 kHz 700 Hz default 0...

Page 28: ...en installed DE SCR OFF if DS8000 option is fitted CTCSS OFF if CT5000 option is fitted DTMF OFF T ELMT OFF T ELMT OFF T ELMT OFF T ELMT OFF T ELMT OFF 2 Rotate the MAIN DIAL or SUB DIAL while listening to the received audio which contains the unwanted tone until the BUSY legend has disappeared this indicates that the tone has been eliminated and will be ignored by the receiver It is sometimes bes...

Page 29: ... utilised making the available selection of 0dB 10dB 20dB with 0dB being the most sensitive selection with the preamplifier on The following provides a simple picture 0dB Preamp ON most sensitive AMP legend displayed 10dB Preamp OFF 10dB less sensitive 20dB Preamp OFF 10dB of attenuation added and preamp off least sensitive 230 to 999 999999 MHz As the preamplifier is not used above 230 MHz a high...

Page 30: ... 7 MHz I F output suitably wide enough to drive the optional SDU5000 spectrum display unit with a bandwidth of up to 5 MHz The I F output is default to OFF so must be activated before the SDU5000 or any other similar peripheral may be used To enable the I F output the CONFIG menu is used To access the CONFIG menu press Use the keys to scroll through the menu until the EXT IF OFF EXT IF OFF EXT IF ...

Page 31: ...may also be configured to use automatic aerial switching First determine the required aerial switching bandplan automatic aerial selection may be specified down to hundreds of kHz i e 145 100 MHz 7 1 MHz etc If the required switching is simply ANT 2 for 10 kHz 30 MHz the SO239 socket for HF the process is very easy if more complex then it is suggested that a table be written onto paper see later i...

Page 32: ...30MHz 90MHz 120MHz 1 lower freq limit 140MHz 1 upper freq limit 150MHz 2 lower freq limit 170MHz 2 upper freq limit 200MHz 3 lower freq limit 3 upper freq limit and so on 9 lower freq limit 9 upper freq limit In this example all four aerials have been used as if the optional AS5000 were in use complex programming is still possible using the standard two aerial inputs ANT 1 1 1 1 1 and ANT 2 2 2 2 ...

Page 33: ...ogram search mode automatic aerial switching is not selected as default when programming the search parameters However you may still manually change the aerial selection when in program search mode Simply initiate whatever search bank is required refer to sections 12 4 12 5 of this manual covering program search mode then override the current aerial selection by pressing to select automatic aerial...

Page 34: ...d for memory retention The stored data may be quickly and easily recalled changed or deleted using the memory recall and delete facilities Note When the receiver is switched OFF using the front panel key all VFO data will be automatically stored into EEPROM memory storage However should the power be removed while the receiver is switched on power cut or flat vehicle battery etc the last stored mem...

Page 35: ... case letters numbers and symbols The and keys move the text entry point to the right and left respectively If a mistake is made during entry use the key to move back to the required position and simply over write it You will note that each time the entry point is moved and text selected the next letter offered is not 0 0 0 0 0 or A A A A A but continues from the character number or symbol last us...

Page 36: ...hen you have entered many frequencies into the memory banks and may wish to change the data contained change frequencies comments or modes etc Memory over write The easiest way to change the memory channel contents is simply to key new data over the top as shown in section 7 1 of this manual For example let s assume that you wish to store a new frequency of 92 7 MHz into memory bank 1 1 1 1 1 loca...

Page 37: ...wish to delete by rotating the MAIN DIALor by using the keys The SUB DIAL may be used to change the memory bank identifier The keys may also be used to select the memory channel Alternatively you may enter the memory location in full via the numeric keypad For example to recall memory channel 123 123 123 123 123 press while in memory recall mode Once a channel has been recalled to delete data from...

Page 38: ... from all memory banks to be scanned as a separate function This reduces the need to PASS LINK and UNLINK banks and channels AUTO STORE reserves memory bank 0 0 0 0 0 so that active frequencies found while conducting a SEARCH may be automatically written to memory see SEARCH at section 12 with auto store at section 12 19 This is a useful tool for compiling an activity list of rarely used frequenci...

Page 39: ... active frequency displayed to the left It is possible to swap between FREQUENCY display and TEXT display by pressing providing text has been stored in the memory channels Note If text has not been stored in the memory channels and TEXT DISPLAY has been selected the AR5000 will halt on busy channels but no frequency or text will be displayed this can be confusing at first To restore the frequency ...

Page 40: ...ettings of whichever bank link identifier profile number is displayed when the bank link menu is accessed by pressing this equates to whichever was last set Use the SUB DIAL to select the required identifier followed by the to accept the changes Deselecting linked banks It is not necessary to deselect bank link identifiers if you wish to scan a single scan bank simply access the bank link menu and...

Page 41: ...be PASSED locked out is not immediately displayed the MAIN DIAL may be rotated to review specific memory channels Alternatively the memory channel location may be quickly recalled by keying in the required location via the numeric keypad For example to recall memory channel 100 100 100 100 100 type there is no need to press enter When the memory channel has been selected the legend PASS to the lef...

Page 42: ... facilities of BANK LINK SETUP press Initially the BANK LINK menu is displayed the and keys allow selection of the additional facilities operating as a carousel The MAIN DIAL and SUB DIAL may be rotated to change values on each menu The key selects OFF and sometimes default such as 2 0s as in the DELAY menu When you are happy with the changes press to accept the entry and the AR5000 will revert to...

Page 43: ...election process In fact the key may be used as a toggle between OFF and the new setting While in memory recall or scan mode the LCD legend N N N N N SQL for noise squelch normal operation is replaced by the legend L L L L L SQL to indicate that level squelch is in operation To accept the changes to scan LEVEL SQUELCH press to return to normal display SCAN SEARCH or VFO mode Alternatively you may ...

Page 44: ... ALL ALL ALL ALL To accept the changes to MODE scan press to return to normal display SCAN SEARCH or VFO mode Alternatively you may move to previous options using the or keys Note If no channels have been programmed into memory using the selected receive mode the receiver will not be able to scan use this facility carefully and thoughtfully If the receiver is unable to scan and the bleep tone is e...

Page 45: ...s may be used to review hunt for and select memory channels to be tagged or un tagged the SUB DIAL is used to change bank number When the memory channel has been tagged using the sequence the legend S S S S S will be displayed next to the bank number of the chosen memory channel to confirm selection Each time the sequence is keyed the SELECT SCAN status S S S S S is toggled so that the channel may...

Page 46: ...d the frequency is checked for activity every 5 seconds First ensure that there is data stored in memory channel 000 000 000 000 000 To engage the priority facility press this may be carried out while in SCAN SEARCH or VFO modes The legend PRIO appears toward the centre of the top line of the LCD to indicate that PRIORITY IS ENGAGED switched on Once priority has been activated the contents of the ...

Page 47: ...SED skipped and active frequencies stored into memory There is even an AUTO STORE facility where active channels are automatically written to memory bank 0 0 0 0 0 When the AR5000 stops on a genuine active frequency during search the key may be pressed to transfer the displayed frequency to VFO D where it may be monitored for long periods of time or tuned Pressing for more than 1 second will initi...

Page 48: ...ert to VFO A or VFO B depending upon which was being used when manual search was selected As a result VFO A will display the lower frequency and VFO B the upper This can also be useful if you wish to quickly change the band edges of manual search and restart the process Accept the frequency from manual search mode If you wish to stop the manual search and monitor an interesting busy frequency it i...

Page 49: ...confirm operation Saving busy frequencies into memory It is possible to save interesting frequencies into memory While stopped on an active frequency press and hold the key for more than one second the MEMORY INPUT menu will appear Select the desired memory location for storage refer to section 7 1 of this manual if you are unsure of the required key strokes Press the key to accept input the manua...

Page 50: ...led VFO search will only stop on active frequencies which have modulation such as voice present The AR5000 will not remain on unmodulated frequencies such as blank carriers You may find this facility useful for skipping over STRONG signals but WEAKER noisy signals may fool the AR5000 into thinking that modulation is present as will signals which have pilot tones or heterodynes present Experimentat...

Page 51: ...ank 1 01 press To select bank 5 05 press To select bank 9 09 press To select bank 10 press To select bank 19 press The key has the effect of a TEN key i e bank 13 may also be selected as in a similar way to the action of some TV video remote controls 12 6 Cancelling re starting program search saving active frequencies It is possible to cancel program search resume save frequency to VFO where it ma...

Page 52: ...LCD for this example As no data exists the legend will be displayed if data was present the upper HI HI HI HI HI and lower LO LO LO LO LO frequency limits would alternatively be displayed to warn that data was about to be over written To accept the bank location of 05 05 05 05 05 and initiate the programming process press Input the lower frequency limit The legend LO LO LO LO LO will flash on the ...

Page 53: ...not mandatory Should you wish to ignore the entry of text press now LO HI MODE FM IFBW 15 0 STEP 25 000 TXT TXT TXT TXT TXT To aid text entry a decimal is displayed to the right of the text entry point initially close to the left of the LCD The SUB DIAL is used to make selection of text in the form of upper case letters numbers and symbols The and keys move the text entry point to the right and le...

Page 54: ... the sequence and return to VFO mode 12 9 SEARCH outline introduction to additional facilities available During program search the AR5000 tunes to every frequency between two specified frequency limits looking for active interesting frequencies When an active frequency is located when a signal is found and the squelch is open the receiver will temporarily stop searching At default when shipped fro...

Page 55: ...hese are identified by number 0 1 2 3 4 5 6 7 8 9 The SUB DIAL is used to make selection of favourite setup To linkALLbanks first use the SUB DIAL to choose a bank link identifier 0 being displayed as default then to link ALL search banks press all the identifying numeric keys for the twenty banks 00 19 search bank 00 search bank 01 search bank 02 search bank 03 search bank 04 search bank 05 searc...

Page 56: ... return to the GROUP selection rotate the SUB DIAL until one of the desired search bank numbers is displayed 12 13 Additional PROGRAM SEARCH facilities introduction It is possible to alter the sequence of search events when in PROGRAM SEARCH mode depending upon the SEARCH CONFIGURATION as defined in the BANK LINK SETUP sub menu As with BANK LINK 10 PROFILES of the additional facilities may be used...

Page 57: ...sed as a short cut toggle between OFF and the default of 2 0 seconds To accept the changes to DELAY press to return to a normal display SCAN SEARCH or VFO mode Alternatively you may move to the next option LEVEL SQUELCH by pressing the key 12 16 PROGRAM SEARCH LEVEL SQUELCH The search LEVEL SQUELCH parameter causes the AR5000 to check the signal strength of active frequencies and to only stop when...

Page 58: ...to VOICE SQUELCH press to return to a normal display SCAN SEARCH or VFO mode Alternatively you may move to the next option AUTO STORE by pressing the key 12 18 Cyber Search A special facility has been provided to speed up the search process which is capable of searching about 25 frequencies per second typically the speed increases to about 45 frequencies per second as long as the step size is set ...

Page 59: ...auto store On Off menu the BANK LINK SETUP menu has to be used Press initially the BANK LINK menu is displayed Use the key to locate the menu A STORE A STORE A STORE A STORE A STORE PAUSE OFF DELAY 2 0 L SQ OFF VOICE OFF A STORE OFF A STORE OFF A STORE OFF A STORE OFF A STORE OFF The key toggles between OFF and ON Press to select ON then press to accept the changes The AR5000 will revert to SCAN S...

Page 60: ...iminating known troublesome blank carriers even before you start to search To access the pass menu press and hold the key for more than one second The legend F PASS F PASS F PASS F PASS F PASS will be displayed with an identifying bank number or legend VFO VFO VFO VFO VFO to the right depending whether the receiver is currently in program search mode in which case the current bank number will be d...

Page 61: ...displayed under the legend BANK if in VFO mode the bank number will be replaced by the letter V V V V V If no pass channels are currently allocated for the selected bank the legend will be displayed If pass frequencies have already been registered pass channel numbers will have been automatically allocated starting at 00 through 99 The first pass channel will be displayed with the legend 00 00 00 ...

Page 62: ...end displayed under the bank identifier shows that the bank contains frequency pass channels which may be deleted the legend indicates that the search bank does not contain any frequency pass channels To delete all frequency pass channels of the selected bank press after about two seconds the legend will change to to indicate that all the pass frequencies have been deleted Press or to return to SC...

Page 63: ...o indicate that initial set is in progress 4 Press the key to move on to TEXT SELECT 24H SELECT 12H 6 23 16 1 AM 6 23 16 1 TXT 1 TXT 1 TXT 1 TXT 1 TXT 1 4 23 30 2 PM 4 23 30 2 TXT 2 Use theSUB DIAL and numeric keypad if you wish to select the required three character text comment for clock 1 such as UTC UTC UTC UTC UTC This is carried out in the same way as text input to memory or search banks the...

Page 64: ...1 The receiver may be programmed to switch on at a specific time on a daily basis in either BEEP or RADIO modes Alarm BEEP During ALARM BEEP mode the AR5000 will power up at the pre set time causing the beep sounder to activate repeated three beeps at the pre set volume level This is useful as an expensive alarm clock when you don t want to miss an important broadcast or event Alarm RADIO In ALARM...

Page 65: ...ting will be ignored and the level set here used Note An audible low level noise may be heard while rotating theSUB DIAL in this menu with a click while passing 0 this is normal 6 After selecting appropriate parameters press to complete data entry and return to the normal frequency text display The ALARM legend will be displayed to the left of centre on the top line of the LCD to indicate that ALA...

Page 66: ...elapsed the AR5000 will automatically switch off 15 Option Descrambler voice inverter DS8000 An optional voice inversion unit may be fitted to the AR5000 to enable decoding of certain types of analogue scrambling such as some cordless phones Such a board is not produced by AOR but the receiver has been designed to accept the DS8000 available from dealers in some countries 15 1 Descrambler installa...

Page 67: ...o accept the displayed value 4 To toggle the current selection ON OFF press select the DESCRAMBLE menu Note If the optional DS8000 is not fitted the above procedure will result in no audio being produced Not all decrambler units are designed to work with the AR5000 Consult with your dealer if you have any doubts regarding suitability 16 Option CTCSS tone squelch CT5000 The optional CT5000 tone squ...

Page 68: ... second item in the list 16 2 Operation of the CT5000 overview Of course you first need to find a transmission which is using CTCSS tones Assuming that you have located such a transmission there are two ways in which CTCSS may be used SEARCH and SQUELCH SEARCH Hunt for the CTCSS tones being used The flashing LCD legend TONE indicates that CTCSS frequency search is in operation SQUELCH Selectively ...

Page 69: ... to abort entry press The legend TONE on the top line of the LCD confirms selection of CTCSS tone squelch When transmissions are encountered containing the selected CTCSS frequency normal reception will be established with the squelch opening and closing in the normal manner 6 To toggle the current selection ON OFF press select the CTCSS menu Note If the optional CT5000 board is not fitted the abo...

Page 70: ...the printed circuit board high quality multiple layers invalidating the warranty Note The LCD legends will still display 3 0 kHz and 6 0 kHz even when substitute 2 5 kHz and 5 5 kHz Collins optional filters have been fitted 1 In order to lift the upper case carefully with the correct fitting posi drive screwdriver remove the 4 screws from the top cabinet and the 3 screws from each side panel the s...

Page 71: ... and 500 Hz filter options have not been selected if the boards and filter have not been fitted If you have activated the MUTE connector ensure that there is a shorting plug in place 18 2 CPU reset switch If switching the set off on does not help the next action should be to reset the receiver using the hidden reset switch provided The reset switch is located behind the torque lever to the rightof...

Page 72: ...ed from power all other memory data is stored within the EEPROM which is not affected by depletion of the back up capacitor The clock should be maintained for approximately 50 hours without supply if the set is left disconnected for longer than 50 hours make sure the clock is keeping the correct time this can be noted as the LCD segments will light up momentarily when the set is connected to the m...

Page 73: ...SS search and squelch operations AS5000 aerial switch Automatic aerial switching unit designed to control four aerials automatic and front panel aerial switching with the AR5000 DS8000 speech inverter Speech inverter board non AOR product Not available in all countries RS232 command set Programmers RS232 command listing with information on configuring Windows terminal A separate serial connecting ...

Page 74: ...0 aerial switch As a compromise it may be worth making up a dipole aerial for one band of particular interest and have a VHF UHF discone plus second random wire for general listening It is quite easy to make a dipole for short wave for that matter one can be easily made up for VHF or UHF too If being made for VHF UHF the centre connection of the coaxial cable feeds the upper element set vertically...

Page 75: ...e in severe gales Stub filters Should you encounter breakthrough when using an external aerial and the attenuator does not help a simple stub filter placed in the coaxial cable may help This comprises of a T connector with an open circuit 50 OHM cable length the stub attached to the T piece A rough calculation for the stub length is as follows 75 Freq in MHz x 0 67 Stub length in metres i e To red...

Page 76: ... or the angle too steep transmissions will simply pass straight though the ionosphere without being reflected and will travel upward to the next ionosphere layer E layer Above the D layer is the E layer located at a height of about 100 kilometres The E layer tends not to absorb signals as much as the D layer but refracts some signal back to Earth where it may be received some distance from the ori...

Page 77: ... speed 25 increments per second in standard mode 45 increments per second with step size of 100kHz or less in Cyber Search PASS frequencies 2100 total 21 banks x 100 ch inc VFO Priority 1 channel I F output 10 7 MHz with maximum 5 MHz bandwidth External reference 10 0 MHz input Mute Phono RCA socket CMOS input pull up to 5V 100k OHMS Operating temp 0 to 50 C Aerial input 50 OHM unbalanced N TYPE S...

Page 78: ...AR5000 OPERATING MANUAL PAGE 77 ...

Page 79: ... best signal strength and recovered audio When used in synchronous AM modes A F C ensures that the signal is pulled within lock range for no fuss operation A F C is particularly useful on the VHF UHF bands to ensure that the AR5000 is receiving spot on frequency especially when searching through unusual band plans or when the exact band plan is not known Restrictions a A F C does not operate on US...

Page 80: ...splay as 00 33 66 99 In reality the AR5000 may be programmed in 8 333 kHz steps to further minimise the compound error the error is then very small indeed especially when considering the sub band is only expected to occupy 132 000 134 500 MHz one Hz every third tuning increment Work around If you do not wish to live with a small compound error it is possible to program three program search banks a...

Page 81: ...i Taito ku Tokyo 111 Japan Tel 81 3 3865 1681 Fax 81 3 3865 1697 AOR UK Ltd Unit 9 Dimple Road Business Centre Matlock Derbys DE4 3JX England Tel 44 1629 581222 Fax 44 1629 580070 e mail info aoruk com http www aoruk com ...