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Nexus DSC User manual 1

1. sese 2 Digital setting circles specifications 2 Package Coritert sise eed eode aee Ren 2 DAVEY OG COON 3 Unipacking icc teneor eene esee tree eR e nee Rar ea Ren 3 elder D I 3 Charge the battery i caen RR De E eR Node 3 User interface ed Ee ee SER e ERR ee ERES 4 Main Menu 4 Status BOT m 4 KeyDad ip ri DRIN ein iari 4 Initial Set p 05 eei tere Decore ORE eser es CER rr Te aU ea 4 Setting the time and date sess 4 Connecting to your telescope 5 Telescope Settings 5 Two star alignment esses 6 Alignment object screen 7 Pointing aCCUraACy 7 LOCATING an object 8 Nexus DSC s MeNUS ns 10 ki npDri pct 10 TelescoDe nw e edere eda eR RE FOE ions 10 Communications 10 Time and Date 11 dig P O 11 Display Keypad esses 11 LU mU 12 Altitude Reference seen 12 First Object Alignment sese 13 Second Object Alignment sese 13 Alignment Status 13 MDOINCSTOr 13 Mpoint Parameters 14 Mpoint Edit Points 15 Mpoint Analyse esses eee ennt 15 Equatorial Timer 16 Zn 16 From Catalog
2. Pressing key now will take you to the first object in the selected constellation 21 55 21 W05 NGC2191 gh 8m 245 103 5 130 5 52 30 41 GALAXY IN CARINA 235312 W075 Specify the object WDS 01362 After changing the sign press ok 23 53 17 BOS Specify the object WDS 01362 _ Now finish typing the rest 5732 and Nexus DSC will automatically switch back to the previous screen showing where to move the telescope to find WDS01362 5732 7 023153 28 W753 WDS01362 5731 th 36m 115 0 07 10 66 s DOUBLE STAR IN ERIDANUS A similar approach applies to some other catalogues like ESO Herschel and others Please note that this quick access to objects is only available when the Filter is set to Disable The last selection of the catalogue and object will be save in non volatile memory Constellation This mode is used when you need to find objects fom a catalogue that are situated in one constellation 18 Pressing A V key will switch the screen to next previous object in the constellation Object Type This mode is used when only objects of a certain type need to be shown You can select an object type once Filter is set to Object Type 7 D21 57 43 W059 Catalogue NGC Filter us Li Type Specify Galaxy Pressing key now will take you to the first object of the selected type 7 21 57 50 W07
3. LI Reverse O Reverse where the mount type can be selected by using A and Y keys The encoder steps are set to 10000 steps by default and should be set to the number of steps corresponding to the number of steps of the encoder installed on your telescope Encoder steps can be set by using the numeric keys on the keypad Please enable Reverse if required as described previously 7 216 12 113 W075 Mount Type Alt z AZ Encoder steps 10000 C9 Reverse ALT Encoder steps 10000 O Reverse Two star alignment Nexus DSC needs to be aligned on two stars before it can locate celestial objects V The two star alignment is performed in three steps Please go to the Align menu Your telescope does not need to be levelled for Nexus DSC to locate celestial objects accurately 0189 43 21 MS rt Align Then select Altitude Reference 18 44 03 8175536 Altitude Reference Adjust the altitude reference angle if required 21 43 04 W75 Altitude angle 90 Telescope coordinates 358 74 88 20 Now move the telescope into position depending on the mount type for 90 degrees reference Telescopes on Alt Azimuth mount should be positioned vertically aap f 1 The same rule applies to telescopes installed on equatorial platforms Please note that the telescope should be at 90 degrees to the ground board not the ground
4. Mpoint Edit Points 018 44 23 BD75 amp 60609 Mpoint Analyse F 18 44 25 BO75 OOOO EQ Platform Timer 28 Nexus DSC User Manual Find Menu 7 218 44 55 W75 DE GR From Catalogues 7 218 44 53 75 OE GR From Observation List 7 O18 45 03 W75 E GR Object at RA Dec 018 45 05 W075 DE GR From Planetarium Test Menu 7 O18 45 16 W075 CS Encoders 7 218 45 118 W75 M T 0 ay gt WiFi Nexus DSC User Manual 29 Info Manu 30 F 18 45 32 W75 OO v About Nexus DSC 7 O184535 W75 DO amp vC Time 7 O184537 W75 DO Y Battery F 18 45 38 W75 DOS GPS Nexus DSC User Manual List of Compatible Planetarium Software Nexus DSC is compatible with most planetarium software packages that support LX200 protocol You can also use planetarium software that supports ASCOM platform http ascom standards org The table below lists just a few software packages that Nexus DSC was tested with Software Name Platform Website AstroPlanner Windows http www astroplanner net Mac OS X Cartes du Ciel Windows http sourceforge net projects skychart DeepSky Windows http www deepsky2000 net Hallo northern sky Windows http www hnsky org M
5. You can find software updates and user documentation on the Astro Devices website http www astrodevices com e mail mailto support astrodevices com subject Nexus DSC support Nexus DSC User Manual 33 FCC Statement for Nexus DSC Contains FCC ID YOPGS1011MIP IC ID 9154A GS1011MIP This device complies with Part 15 of the FCC Rules Operation is subject to the following two conditions 1 this device may not cause harmful interference and 2 this device must accept any interference received including interference that may Cause undesired operation NOTE To comply with FCC RF exposure compliance requirements the antenna used for this transmitter must be installed to provide a separation distance of at least 20 cm from all persons and must not be co located or operating in conjunction with any other antenna or transmitter NOTE This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio
6. RA Dec Object at RA Dec 7 9019 45 05 W05 Now you need to specify the coordinate 19 7 022i NI 555 22 00 27 Specify coordinate J2000 RA h m sDEC You can change the sign for the declination by using A and Y keys 222 02 13 Specify coordinate J2000 RA 0 h24m6 s DEC NI 535 After the coordinate has been specified Nexus DSC will show where to move the telescope to point at the object Grus T 022 02 47 075 0h 24m 455 m 57 2 1 9 Ayo 22h50m 5s 38 53 49 Nexus DSC shows the current telescope position at the bottom of the screen and on the right is the coordinate of the object transformed to the current epoch The top left corner show the constellation where the telescope is currently pointing From Planetarium Nexus DSC allows to connect to a planetarium software using either via the serial port or via optional WiFi interface A GOTO even though Nexus DSC is a Push To system when used without motor controllers command can be executed from the planetarium software and Nexus DSC will show where to move the telescope to point at the object This mode is entered by selecting From Planetarium from the Find menu Ww From Planetarium 18 45 05 ME Nexus DSC shows the current telescope position at the bottom of the screen and on the right is the coordinate of the object that was received
7. any pressure on the axle while the telescope is moving Alignment problems Source of the problem Alignment error is big Pointing accuracy is poor when moving the telescope to a different part of the sky 32 Encoder s resolution is not set correctly Telescope was pointed at the wrong star while performing the two star alignment procedure Telescope was not set at the reference star while performing the two star alignment procedure Alignment star s selected are below or close to 30 in altitude where the refraction has a much greater effect Alignment stars selected had a small separation angle in azimuth Set the encoder s resolution to the correct number of steps corresponding to the number of steps of the encoders installed Make sure the telescope is pointed at the selected stars Set the telescope to the reference altitude before pointing at the alignment stars Make sure that the alignment stars selected are positioned between 50 70 in altitude Please select stars that have a separation of at least 70 in azimuth Nexus DSC User Manual Warranty Nexus DSC is covered by a one year limited warranty Please refer to the enclosed warranty certificate for full details Technical Support You can find the latest version of the manual and firmware in the support section of our website Please feel free to e mail us should you require further technical assistance Technical Support
8. are in the order of significance Mpoint Edit Points Once the telescope is aligned on a number of objects you can check how they errors are distributed in relation to the average centre To see all alignment objects error distribution you need to select Mpoint Edit Points Nexus DSC User Manual T 3922 32 7 MX 7 ec oes ss 70 Mpoint Edit Points This screen shows a diagram that has pointing errors shown as dots relative to the centre point 22 33 40 W059 Raw pointin Object 11 of 11 Phact The first line on the right shows the pointing type next line shows the current point object and the last line shows the object name You can switch between Raw Pointing errors uncorrected pointing without the pointing model and Corrected pointing by using A and keys To go to next previous point use 4 and gt keys To delete a point press 0 key Mpoint Analyse Once you aligned your telescope on a reasonable number of calibration stars and selected terms that you want to use for your telescope s model you can analyse the results Select Mpoint Analyse from the Align menu 7 018 44 23 BOSS Mpoint Analyse The screen will show a diagram for two modes Raw Pointing without the model and Corrected Pointing when using the model calculated You can switch between them by using A and CY keys 7 23 03 56 W075 Raw pointing e RMS 18 79 SD 16 06
9. clockwise around RA AZ axis e the Dec Alt current position in degrees is increasing when moving the telescope up in declination altitude If either of those values is not increasing then set the encoder steps for that axis to Reverse in the Telescope Settings Telescope Settings Nexus DSC needs the mount type and encoder steps to be set correctly before it can be used to locate celestial object precisely The mount type and encoder steps are set in the Telescope Settings that can be accessed by selecting Setting from the main menu FoOw42ss ASE Settings then by selecting Telescope T7 18 43 45 ASE Telescope Then you need to select the telescope 7 222 41 14 BL 17555 SELECT TELESCOPE TELESCOPE 1 Nexus DSC allows to have up to five different telescope configurations A and keys are used to switch between telescope configurations You can also rename TELESCOPE 1 to your telescope name You just need to activate the Rename button by using amp and then press the key A text cursor now appears under the name O2241393 ASE SELECT TELESCOPE TELESCOPE 1 Rename You will now be able to edit the name and change it to your telescope name T 24636 W075 SELECT TELESCOPE 18 Obsession_ Now you need to set other parameters for your telescope 21 40 10 W75 MOUNT TYPE ALT AZ AZ ENC STEPS 10000 ALT ENC STEPS 10000
10. key to go to the next page 7 21 50 03 M S EINPAE OPAxis NS DPAxis EW OTube Flexure DFork Flexure ODEC Axis Flexure Page 2 of 4 7 021 50 10 W075 ERA Sine ERA Cosine HDec Sine A DDec Cosine OMount Square Sine OPAxis NS Sine Page 30 7 2021 50 13 W075 Page 4 of 4 Next Term Mount Description Type RA Offset All IA AZ offset for AItAz Nexus DSC User Manual RA Scale All Usually equal 1 Dec Offset All IE Alt offset for AltAz Dec Scale All Usually equal 1 Tube Square AltAz or Collimation error for Alt Azimuth mounts it is non perpendicularity between pointing direction and altitude axis Mount EQ Non perpendicular Square error in equatorial mount if the RA and Declination axes are not perpendicular NPAE AltAz non perpendicular axis error PAxis NS AltAz Azimuth Axis Misalignment North South AN PAxis EW AltAz Azimuth Axis Misalignment East West AW Tube Flexure AltAz Tube Flexure TF Fork Flexure EQ For fork mounts the flexure in fork arms DEC Axis EQ Declination Axis Flexure flexure DAF RA Sine All AZ Sine for AItAz HCES RA Cosine All HCEC Dec Sine All DCES Dec Cosine All DCEC Mount EQ Square Sine PAxis NS EQ Polar Axis North Sine South Misalignment Sine PAxis NS EQ Polar Axis North Cosine South Misalignment Cosine The terms above
11. or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures Reorient or relocate the receiving antenna Increase the separation between the equipment and receiver 34 Nexus DSC User Manual DECLARATION OF CONFORMITY We Astro Devices ABN 75 270 616 917 198 The Esplanade SYLVANIA NSW 2224 AUSTRALIA E mail info astrodevices com As manufacturer producer declare that Product Name Nexus DSC Product Series NXD100 Product Description Digital setting circles for telescopes conforms to the following directives and standards therein Directives WEEE Waste from Electrical and Electronic Equipment 2002 96 EC Radio Equipment amp Telecommunications Terminal Equipment R amp TTE 1999 5 EC RoHS Restriction of use of Hazardous Substances in Electrical and Electronic Equipment 2002 95 EC Standards EMC EN 55022 EN 301 489 1 V1 8 1 2008 04 EN 301 489 17 V2 1 1 2009 05 RADIO EN 300 328 V1 7 1 2006 10 Immunity EN 55024 EN 61000 4 2 2001 EN 61000 4 3 2002 Safety EN 60950 1 2006 A11 2009 A1 2010 Supplementary Information Nexus DSC contains CE ID L850347L199 This unit is a battery operated appliance Date of issue November 2 2014 Nexus DSC User Manual 35 Printed in Australia
12. procedure described above to change the selection of the second alignment object if necessary Press the button once the star is in the centre of the eyepiece Now Nexus DSC will show the alignment error F 21 46 29 M S Alignment Successful Alignment error 0 02 Now you can press either the key or the key to go to the previous menu You can go back to align on first or second object at any time in case the alignment error is too big Alignment object screen Alignment object screen presents the following information 596 48 AZ218 3 Alt 26 00 19 50 43 00 90 00 fo D 9 amp 6 f Currently catalogue 2 Currently selected object s azimuth Currently selected object s RA Object s information Currently selected object Currently selected object s altitude Telescope s AZ RA 8 Telescope s Altitude Declination 9 Currently selected object s declination D 8 Pointing accuracy Pointing accuracy depends on a number of factors Quality of the telescope mount e Choice of alignment stars Accuracy in pointing on alignment objects To achieve the best pointing accuracy with an Altitude Azimuth mount it is recommended that The alignment stars chosen should always be at 30 to 80 degrees in altitude and separated by at least 70 degrees in azimuth Alignment stars should ideally have at least a few degrees separation
13. range Nexus DSC has internal over current protection but it is safer to use it with the power source specified The internal Lithium battery can only be charged at a temperature range of 0 Ks to 30 C 32 F to 86 F User interface Main menu The main screen consists of a status bar horizontal menu with icons and a text description of the currently selected menu item _ _ TO154228 MS Id m Status bar 2 Main menu 3 Menu description Status Bar The status bar shows basic information about battery state current time GPS receiver status and WiFi The status bar has the following elements 7019 42 28 W075 1d Settings 1 WiFi status is only shown if the WiFi is enabled 2 GPS fix status the dot in the centre is flashing until the GPS receiver acquires the current location 3 Current time in 24 hour format 4 Battery charge level in Keypad Nexus DSC has a full numeric 0 9 keypad with directional keys 4 C amp CA CY and to allow an easy method of control The keys have the following functions e 0 to 9 keys are used to specify a numeric information to Nexus DSC e 4 and gt keys on the keypad move between previous and next menu item they are also used to move between control fields edit value list check box on screen buttons in a dialogue screen The 4 key also acts as a backspace when editing a value in edit fi
14. 2 89 PSD 18 37 O Use model 23 04 05 W059 Corrected Pointing RMS 2 51 SD 177 1 80 E PSD 2 84 D Use model 15 If you the results are suitable then you can enable using the calculated model for telescope pointing 023 04 43 W05 Corrected Pointing s RMS 251 SD 177 180 PD LM Lan If you wish to adjust the model then you can e Add more calibration stars e Add or delete which terms are used for the model If you did not align on a sufficient number of calibration stars then the following error message will be displayed 21 50 35 m0759 Could not calculate the point ng model Add more calibration points or reduce the number oF modeling terms O Use model Equatorial Timer Equatorial Timer is intended to be used when Nexus DSC is operated with a telescope mounted on an equatorial platform Once you performed the two star alignment with the platform in its starting but stopped position you need to start the equatorial platform and the equatorial timer at the same time You can access the timer control by selecting EQ Platform Timer from the Align menu 7 518 44 25 W75 EQ Platform Timer Then activate the Start button using use 4 key 7 00 21 05 W053 Equatorial Platform Time 5 0 00 And press the key and start the equatorial table at the same time You will see that the timer starts incrementing Start 16
15. 5 NGC Tm 165 25978 1492 045 GALAXY IN PEGASUS Pressing A Y key will switch the screen to next previous object of the selected object type Magnitude You can use this mode when you need to shown objects whose magnitude is brighter than a certain value You can set the maximum magnitude once Filter is set to Magnitude Nexus DSC User Manual 021 53 23 W75 Catalogue NGC Filter Magnitude Specify 10 50 Pressing A _ key increase decrease the magnitude limit Pressing key now will take you to the first object whose magnitude is equal or lower than the specified magnitude FOLIES ASE NGC40 oh LUS 15 gt 103 7 187 3 x vw PLANETARY IN CEPHEUS Pressing A key will go to the object whose magnitude values is greater or equal the specified magnitude while pressing Y key will switch to object whose magnitude value is lower than the specified magnitude From Observation List Nexus DSC supports observation lists in SkySafari s format Most popular observation planning applications support export of observation lists in SkySafari s format Astro Planner Deep Sky Planner and SkyTools SkySafari can also be used to create observation lists Please refer to the user manual of your favourite application on instructions on how to export an observation list An observation list will have skylist file extension The exported observation list needs to be c
16. 90 Telescope coordinates 0 00 90 00 22 24 02 1 595 Altitude angle t Telescope coordinates 0 00 90 00 OK 22 24 8 W05 Altitude angle Custom 000 00 Telescope coordinates 0 00 90 00 The custom angle can be set with a precision of 1 100 of a degree Once Custom is selected you can change the integer part from 180 to 180 using A and Y keys 022 24 32 W75 Altitude angle Custom 000 00 Telescope coordinates 0 00 90 00 OK And then you can set the fractional part using A and Y keys cie5 06 W075 Altitude angle Custom nmi Telescope coordinates 0 00 90 00 OK Nexus DSC User Manual First Object Alignment You can choose first alignment object by selecting First object alignment from the Align menu 18 44 06 M5 First object alignment Use 4 and gt keys to activate a selection list for the catalogue CAT and a selection list for objects OBJ Use A and Y keys to change the selection Aim the telescope at the selected object using an eyepiece with a reticle or a high magnification eyepiece and once the object is in the centre press key 7 D21 43 35 W075 AZ 117 67 2h58 sQ OBS Acamar Alt 73 35 40 14 44 info 8 Eri 0 00 90 00 Nexus DSC will automatically switch to the Second object alignment Second Object Alignment You can
17. C and local sidereal time Supports LX200 emulation Supports ServoCAT and SiTech motor controllers mounts Equatorial Package Content The package contains Nexus DSC User manual RJ12 to DB9 female serial cable DC 2 1mm to cigarette lighter power cable USB to DC 2 1mm cable Optional power adapter 6V 3A 90 264V AC Nexus DSC User Manual Introduction Unpacking Nexus DSC has a protective film covering the front panel Please peel it off to be able to see the display clearly Controls All controls are situated on front panel of Nexus 1 2 3 ES ok 4a 5 6 0 DOC CO X f power switch 2 keypad 3 display alles Te mon X 7 use mf DEVICES external power connector DC 2 1mm charging status LED USB connector Serial RS232 port Encoders port Micro SD socket Nexus DSC User Manual O is used to charge the battery can be connected to a power adapter or to a cigarette lighter socket using the supplied cable D indicates the charging status of the battery Blinking Description type Solid ON The internal battery charging is in progress OFF The internal battery has been fully charged Flashing Fla
18. For equatorial mounts 0 degrees altitude reference is more convenient Telescopes on an Equatorial Fork for a O degrees altitude reference then be positioned as below Nexus DSC User Manual The telescope does not have to be positioned exactly at the angle specified but it should be within 10 Nexus DSC will automatically switch the screen to the selection of first alignment object F 2i 43 26 W075 CAT Named Stars AZ 218 31 16h 6 18 OBJ Acrab Alt 26 00 19 50 43 inFo Sco 0 00 90 00 While Nexus DSC can be aligned on any object in its database it is best to use objects form either Named Stars catalogue or Bright Stars catalogue It is time to select the first alignment object by pressing to go to the object selection list and then using A and Y to change to another star 021 43 35 W5 AZ 117 67 2h58 s0 OBJ Acamar Alt 73 35 40 14 44 info 8 Eri 0 00 90 00 Acamar was selected as it is well above 30 degrees Now the telescope should be pointed at Acamar using an eyepiece with a reticle crosshair or a very high magnification eyepiece Press the button once the telescope is pointing at the star Nexus DSC will now switch to the selection of a second alignment object Nexus DSC User Manual 7 021 45 51 W75 CAT Named Stars AZ 5 35 1h52 12 OB Baten Kaitos Alt 66 18 10 15 42 info Cet 0 43 73 58 Please follow the
19. Nexus DSC USER MANUAL astro DEVICES User Manual for Nexus DSC Version 1 2 Firmware version 1 x x Last revised on May 5 2015 Printed in Australia Copyright Copyright 2014 2015 Astro Devices All rights reserved No part of this manual may be reproduced or transmitted in any form for any purpose other than the purchaser s personal use without the express written permission of Astro Devices Astro Devices reserves the right to make changes and improvements to its product without providing a notice Precautions and Safety Electricity Nexus DSC contains a rechargeable Lithium ion battery Lithium ion batteries can explode or cause a fire if they are used incorrectly or if they are defective Therefore you are recommended to read the following instructions very carefully NEVER leave Nexus DSC where it is subjected to extremes in temperatures This includes low levels as well as high DO NOT leave Nexus DSC where it is in direct sunlight or in an enclosed space such as a car that can become extremely hot very rapidly Do not drop or subject the Nexus DSC to impact Use only approved power adapter to charge your Nexus DSC Do not handle power plug and adapter with wet hands Electrical shock may result Immediately power off the product and unplug the DC adapter and or batteries if smoke or odours emit from the product Immediately power off the pro
20. Oii W05 Equatorial Platform Time s 8 52 When the equatorial platform reaches its end position you can stop the timer by selecting it is necessary to stop the equatorial timer by selecting EQ Platform Timer from the Align menu activating the Stop button and pressing the key The timer value is reset Start 000 21 40 BOS5 Equatorial Platform Time s 0 00 After moving the platform to its starting position you will need to start the equatorial platform timer again using the procedure described above Find Nexus DSC allows you to locate celestial objects by using one of the following modes From Catalogues e From Observation List Object At RA Dec From Planetarium The following sections describe each mode in detail From Catalogues This mode allows you to locate objects from extensive range of catalogues Abell Planetaries Arp Peculiar Caldwell Collinder ESO Herschel full catalogue Hickson Compact Groups King LBN Messier Minkowski planetaries Markarian galaxies IC NGC Sharpless Stock Trumpler UGC First you need to select a catalogue Galaxies 7 2151 17 Boss Catalogue Messier Filter Disable Nexus DSC allows you to use different filters to limit the list of objects The Filter determines a criteria for showing you a list of objects e Disable all objects from selected catalogue are shown Nexus DSC User Manual Constellation onl
21. ain menu 7 019 42 28 W075 settings then by selecting Telescope 18 43 45 W059 Telescope Nexus DSC supports up to five different telescope configurations Each telescope configuration has its own mount type encoder steps altitude reference angle value Having different telescope configurations allows you to use Nexus DSC with different telescopes without spending time on setting all parameters Then you need to select the telescope 7 222 41 14 5 SELECT TELESCOPE TELESCOPE 1 A and Y keys are used to switch between telescope configurations To select a telescope configuration without changing any parameters just press the key 10 You can also rename TELESCOPE 1 to your telescope name You just need to activate the Rename button by using amp and then press the key A text cursor now appears under the name 7 22 41 33 ASE SELECT TELESCOPE TELESCOPE 1 You will now be able to edit the name and change it to your telescope name SELECT TELESCOPE 18 Obsession Now you need to set other parameters for your telescope 21 40 10 B17555 MOUNT TYPETALT AZ AZ ENC STEPS 10000 ALT ENC STEPS 10000 LI Reverse O Reverse where the mount type can be selected by using A and Y keys The encoder steps are set to 10000 steps by default and should be set to the number of steps corresponding to the number of steps ins
22. ase the button The LED of the button will first flash rapidly and then slowly while the firmware is being updated Wait for around 30 seconds until the main menu appears on the screen Now you can go to Info gt About Nexus DSC and verify that the firmware version is correct Done Nexus DSC User Manual Apendix Ports Pinouts Serial Port Nexus DSC has one RS 232 serial port It uses a standard 6P6C connector The pins are numbered according to the following diagram PIN 1 PIN 6 UIN The pins description is as follows Encoders Port Nexus has a standard RJ 45 connector to connect it to rotary encoders of your telescope The pins are numbered according to the following diagram PIN 1 PIN 8 The pin descriptions are in the following table in Description Channel B of Azimuth or RA encoder 5 V Channel A of Azimuth or RA encoder Ground O1 4 OO NM gt UO Channel B of Altitude or Declination encoder 5V NIO Port Pin Description Serial 1 Ground Channel A of Altitude or Declination encoder 2 TxD transmitted data output 8 Ground RxD received data input Ground Ground Occ Not connected Nexus DSC User Manual WARNING Nexus DSC s encoders inputs do have input protection but care must be taken not to exceed the maximum in
23. attery Once selected Nexus DSC displays state of charge State of charge percentage of charge 100 fully charged 0 fully discharged remaining capacity Capacity in mAh current battery voltage Voltage nominal battery voltage is 3 7V current temperature inside Nexus DSC Temperature in degrees Celsius draw current Current in mA negative when the battery is discharging and positive when the battery is being charged from external power source and elapsed time since power up t in seconds 23 03 04 81 555 State of charge 75 Capacity 3750 mAh Voltage 3 8V Temperature 24 5C Current 115 mA 3133 80 Please note that the remaining capacity may be lower or higher than nominated 5000 mAh for the battery It may take a few full charge discharge cycles for Nexus DSC to adjust the value GPS F 1s4538 DE GPS Advanced Topics Daylight Testing In order to test that everything is setup correctly you can perform a faux two star alignment during the day It is especially important to do when Nexus DSC is used together with ServoCAT or SiTech controller The following procedure describes how to perform a faux two star alignment during the day 1 Perform Altitude Reference alignment as described before 2 Select the first alignment star that is currently above the horizon Nexus DSC User Manual 2 Den 4326 MS AZ 218 31 16h 618 OBJ Acr A
24. change the value Setting the time and date is only required if time synchronisation with GPS is disabled However the time zone and date needs to be set for Nexus DSC to show the local time correctly It usually takes 30 to 60 seconds for the GPS receiver to get a fix on the location under open sky conditions Nexus DSC will update the internal real time clock with the time received by the GPS receiver at this time The GPS receiver will automatically be switched into a power saving mode after it acquired the location to conserve the battery power Connecting to your telescope Nexus DSC requires only encoders connected to operate Please plug the encoder cable into Encoders port on Nexus DSC For operating Nexus DSC with a ServoCAT or SiTech controller the serial port needs to be connected to a serial port on ServoCAT or SiTech controller To make sure that encoders are functioning correctly Nexus DSC has a test mode to test the encoders Selecting Test from the main menu activates it Test 01843351 M S Then select Encoders 18 45 16 W075 Encoders will show the current encoder steps and angles Nexus DSC User Manual 22 06 17 M S 4686 1112 RA AZ 191 30 Dec Alt 49 97 In order for Nexus DSC to function correctly it is required to adjust the encoder steps to make sure that e the RA AZ current position in degrees is increasing when rotating the telescope
25. choose first alignment object by selecting Second object alignment from the Align menu if Nexus DSC did not activate it automatically for example if you decided that the telescope was not aimed at the second alignment object precisely fl Second object alignment 18 44 09 W05 Please repeat the procedure describe above for the second alignment need to change the selection next time you observe Alignment Status The alignment status shows whether the two star alignment was successful it will show the error if unsuccessful and how accurate the alignment was achieved in degrees Any value in range 0 5 to 0 5 is good for visual observing the smaller the value the better Q el 46 29 BOSS Alignment SuccessFul Alignment error 0 02 Mpoint Start Every telescope has some kind of imperfections Fabrication errors Mechanical and optical axes not being perpendicular e Flexure of telescope mechanical structure Nexus DSC can compensate for most of systematic errors Mpoint calculates a mathematical model of your telescope and performs pointing corrections in real time Using Mpoint telescope pointing correction involves 1 Performing the initial two star alignment 2 Starting an Mpoint run of calibration objects from 4 to 128 objects 3 Analysing the results 4 Enabling the model to be used for pointing corrections The first step has been described earlier The second st
26. d easy you can start typing the object s number For example if you wish to go to NGC55 then after you pressed 5 key the display will prompt to continue typing the object number 23 40 57 W75 Specify the object NGC 5_ Now press the 5 key again and then press F 23 4102 W75 Specify the object gt NGC 55_ Nexus DSC will now show where to move the telescope to aim at NGC55 Please note that you cannot go to previous next object in the catalogue by pressing A Y keys while the description is shown on the screen you need to go back to previous screen by pressing 4 or gt key first If the current object s description does not fit on one screen then a scroll bar is shown on the right Nexus DSC User Manual 23 41 15 W059 NGC55 0h 14m 545 597 1469 sru 48 GALAXY IN SCULPTOR Some catalogues require a bit more complex input For example if you wish to locate WDS01362 5732 then you need to press 0 key first 17 23 52 55 W075 Specify the object WOSO_ then continue typing 1362 sign until you get to the You can select a constellation once Filter is set to Constellation 21 55 13 W075 Catalogue NGC Filter Constellation Specify Carina 023 153 05 W075 e Specify the object WDS 0136214 Then you need to change the sign by pressing A or Y key
27. duct and unplug the DC adapter if water or other liquids are present Product Keep it away from harsh environments including humid dusty and smoky areas Do not use excessive force on the connectors Do not attempt to disassemble the device without prior consultation with Astro Devices Do not place heavy objects on the product Damage to your products may result from improper use Technical Support Astro Devices 198 The Esplanade SYLVANIA NSW 2224 AUSTRALIA ABN 75 270 616 917 E Mail support astrodevices com Website http www astrodevices com Thank You Thank you for purchasing Nexus DSC digital setting circles telescope computer We hope you enjoy it You have purchased one of the most advanced Digital Setting Circles computers It will allow you to located celestial objects quickly and easily Nexus DSC has a huge database of objects planets galaxies star clusters globular clusters nebulae and others It also provides extensive descriptions for those objects magnitudes sizes common names alternative designators surface brightness separations for double stars spectral class galaxy morphology It is all available at a press of a button This user manual will get you started and help you make the most of your Nexus DSC Nexus DSC User Manual This page intentionally left blank Nexus DSC User Manual TABLE of CONTENTS Ptoduct FOAtUres iiiisuriin n 2 Technical specifications
28. egastar Windows http www willbell com SkySafari Plus Pro Android http www southernstars com iOS MacOS X Starry Night Windows http www starrynightstore com TheSky 6 Windows http www bisque com FREQUENTLY ASKED QUESTIONS FAQ Q What kind of power source can use to power Nexus DSC A Nexus DSC can be powered with a DC power source with a voltage from 5V to 16V The power source must be capable of supplying at least 2A at 5V or 1A at 12V for best results Q How long does the fully charged Nexus DSC s battery last A The running time depends on a number of factors type of the encoders used whether the WiFi is enabled or not display brightness level keypad backlight brightness to a lesser extent Assuming that telescope is equipped with US Digital S2 S6 10000 steps optical encoders and the display brightness level set to minimum level the battery will last around 16 hours with WiFi enabled and around 22 hours with WiFi disabled Q Does Nexus DSC work with a standard Android based device without any modifications to the device s firmware A Yes Nexus DSC with the WiFi option works with any recent Android based phone tablet without any need to modify the firmware on that device Nexus DSC is acting as a WiFi Access Point Troubleshooting Encoders related problems Problem Source of the problem Solution Display is blank Internal battery is exhausted Connect Nexu
29. elds e a and Y keys are used to select an item from a list to adjust value in numeric fields with predefined steps like Time Zone or to change a character in an edit field they can also be used to go to the previous next menu level The key activates the selected menu item on screen button press accepts a selection from a list finish editing a text or numeric value e The key goes back to the previous menu level screen Initial Setup This section describes how to setup Nexus DSC to start locating celestial objects The following sections will describe all features of Nexus DSC in detail In order to be able to use Nexus DSC for locating celestial object it is necessary to set a few parameters first Time and date Mount Type e Encoders resolution Setting the time and date Please select Settings from the main menu T 018 42 58 ME settings Then select Time and Date T 18 43 50 ME Time amp Date It will show the current time and date that can be changed O214113 75 IME ZONE 10 00 E Daylight savings E GPSsync IME 21 41 13 DATE 04 12 2014 Nexus DSC User Manual If all parameters are set correctly then pressing the key can be used to avoid changing any parameter If the time zone time and date need to be changed then 4 and keys can be used to select the parameter that needs to be adjusted A and Y keys are used to
30. ell Please read the release notes to check if the catalogues are to be updated as well Please note that if the catalogues are to be updated that it has to be done only after the firmware update To update the catalogues on internal flash memory please follow these steps Download the firmware and catalogue update package from Downloads section of our website and decompress the archive to a folder on your computer Turn Nexus DSC off e Remove the microSD card from Nexus DSC and insert it into a card reader Copy ADCTXXX bin to the root folder of the microSD card and eject it from your computer and remove the card from the card reader e Insert the microSD card into Nexus DSC facing up Turn Nexus DSC on Now you are ready to update the catalogues stored in Nexus DSC s internal flash memory Select Utilities from the top menu A Utilities 7 018 43 34 B0759 Now select Update Catalogues from uSD 21 F 18i45i26 W05 icro Update Catalogues frorn uSD 18i4sis6 W075 Info Nexus DSC allows will check what catalogue packages are available on the microSD card and allow you to select the package you just copied to the card Select File ADCTS101 bin Now switch to the Update button on the screen and press key Nexus DSC will start the update About Nexus DSC This screen is activated by selecting About Nexus DSC About Nexus DSC F7 18 45
31. eps starts with selecting Mpoint Start from the Align menu Mpoint Start 7 019 44 15 W05 ALIGN II 21 45 51 m0759 CAT Named Stars AZ 5 35 1h52 12 OB Baten Kaitos Alt 66 18 10 15 42 info Cet 0 43 73 58 Nexus DSC will store your selection of alignment catalogues and objects in non volatile memory which means that you don t Nexus DSC User Manual Then you can select a catalogue of objects to be used as calibration objects F7 2146 W05 Catalogue Narned Stars 13 It is always better to use either Named Stars catalogue or Bright Stars catalogue for calibration objects as it is much easier to put stars in centre of eyepiece It is best to use an eyepiece with a reticle for the calibration run to achieve the precise pointing of the telescope at calibration objects It is also advisable to use stars that are currently at 30 to 80 in altitude the current altitude is displayed in square brackets at the bottom of the screen Once you selected a catalogue you can start the calibration run 17 39 81 555 0h 26m 175 116 0 v ud Reset Add The screen shows you where to move the telescope to Ankaa in this example Move move the telescope and put the star in the centre of your eyepiece as precise as possible Ankaa lt a AS Phe 242 08 64 41 0 T 922 1838 ASE 0h 26m 175 10 09 gt Reset Add Now press the key You w
32. from the planetarium software The top left corner show the constellation where the telescope is currently pointing 20 22 03 33 ME Tucana ah 24m es 0 00 10 02 v 0h24m53s 71 58 50 Identify Nexus DSC can identify celestial objects in the sky This mode is activated by selecting Identify from the top menu Identify TOIS 4328 M75 In the Identify mode you need to select a catalogue of objects where Nexus DSC will try to find an object that is most close to the current telescope coordinate You need to select a catalogue and a radius of search NGC Cataloque 0 50 Within Nexus DSC will generate a list of all objects in the vicinity of the current telescope coordinate The list can contain up to 25 entries and it is sorted on a distance to the current telescope coordinate T 2205 18 PSE NGC104 0h 24m ss 70 18 10 09 27 4 sx GLOBULAR IN TUCANA 1 OF 2 You can switch between objects from the list by using A and Y keys 45 70220521 MOS NGC121 N A 485 0 36 10 4 P GLOBULAR IN TUCANA 2 OF 2 You can also use the Identify function of Nexus DSC when you wish to find other objects nearby Nexus DSC User Manual Nexus DSC will show the following message when it cannot find any objects within the specified radius 22 38 12 Tr TC OL J oe VV 79 No object Found at the current position I
33. i32 W5 Once selected the display will present Nexus DSC s serial number firmware version and firmware date Year month day 22 58 01 E7536 Select File ADCTS101 bin Updating 14 9 Nexus DSC will start checking the update to make sure the catalogues were copied without any problems Select File ADCTS101 bin Checking 59 3 Nexus DSC will show the following message once it updated the catalogues successfully F7 23 02 37 117535 Select File ADCTS101 bin Update was Successful Now you just need to power cycle Nexus DSC so it will start using the updated catalogues Info Nexus DSC displays various information to the user It can be accessed by selecting Info from the main menu screen 22 gt 23 02 48 M S Serial Number 000001 Firmware Version 1 0 0 Firmware Date 2014 11 14 Time Nexus DSC can show local time UTC and sidereal time This is activated by selecting Time which presents 43 02 54 T7596 Local 23 02 54 UTC 12 02 54 SIDEREAL 03 00 41 For the local time to be correct the time zone and daylight savings must be set correctly in Time and Date settings Battery Nexus DSC has a built in battery fuel gauge that stays active even when Nexus DSC is turned off Main parameters of the state of the battery can be accessed through the Bettery menu Nexus DSC User Manual 154537 B075 E B
34. ial menu Serial 7 021 40 43 M 55 Now the serial port parameters can be adjusted as required e Communication protocol Baud rate Stop bits Data bits Parity 7 521 40 53 W759 Communication Protocol Lx200 Baudrate 9600 Stop bits 1 Data bits 8 Parity Even Nexus DSC User Manual Time and Date Nexus DSC has a built in battery backed real time clock with temperature compensation To set the time you need to select Time amp Date 7 21 41 111 W05 Time amp Date then the time settings can be adjusted 0214119 W75 TIME ZONE 10 00 Daylight savings GPSsync TIME 214113 DATE 04 12 2014 The easiest method of setting the time and date parameters is to set T ME ZONE Daylight Savings and Date day month year enable GPSsync and then step outside to allow the GPS receiver to get a fix on the location and the time will be set automatically WiFi 7 21 41 26 BT 595 WiFi 7 021 41 20 7556 WiFi Mode Disabled T 02141 8 NIT 596 DHCP Disabled WiFi Mode Access Point RU d ue assword Passwor Page 1 of 2 7 021 41 53 W05 IP address 10 0 0 1 Mask 255 255 255 Protocol LX200 TCP port 4060 Page 2 of 2 P Display Keypad Nexus DSC allows you to adjust the brightness of display and of the keys backlight The display brightness has a range from 0 to 31 31 is the maximum
35. ill see that the counter at the bottom of the screen after the closing square bracket has been incremented and became 1 Ankaa gt 0 01 Phe 242 14 64 23 0 TQ2218 2 075 Ankaa gt gt 0 01 10 10 m 4o Phe 242 14 64 22 1 ese Rd Now continue the calibration run until you collect enough calibration stars Algebar TO mel uH 0 05 10 01 8 12 6 Ori 64 43 45 007 2 Reset Add Algebar TZ NI 5h 14m 325 0 07 10 02 627 Ori 64 41 45 01 3 Reset 14 It is always good to have the calibration stars spread across the whole sky for achieving the best results Mpoint Parameters Once you performed the calibration run on a good number of stars gt 7 you can select which errors you would like to account for There is a mathematical formula associated with each error and it is referred to as a term You can select which terms to use for your telescope model by selecting Mpoint Parameters from the Align menu Mpoint Parameters 7 019 44 18 W055 Use 4 and gt keys to choose a check box for a term Use A and Y keys to enable disable the term The bottom left corner of the screen show a page number of terms There are currently 19 terms spread over 4 pages ERA Li Dec Orrset OTube Square Page 1 of 4 7 021 49 56 W075 ERA Scal ODec Scale EMount Square Activate the Next button and press
36. in altitude Polaris can be used as one of the alignment stars To achieve the best pointing accuracy on an Equatorial mount it is recommended that e Polaris should never be used as one of the alignment stars Alignment stars with a declination greater than 80 degrees should be avoided The alignment stars chosen should always be at 30 to 80 degrees in altitude and separated by at least 70 degrees in RA Locating an object Once the two star alignment is performed Nexus DSC can locate celestial object in the sky The following steps describe a basic method of location of celestial objects Go to the top menu and select Find F7 O14325 M S Find Select From Catalogues 19 44 55 W759 O cj From Catalogues Select a catalogue by using the A and Y keys 7 23 40 16 SE Catalogue NGC Filter Disable And just leave the Filter as Disable for now 23 40 26 W059 NGC Catalogue Disable Filter The display will show the last selected object 023 40 43 M S 0h 24m 55 72 4 53 NGC104 107 8 111 2 GLOBULAR IN TUCANA Suppose we would like to find NGC55 Just press the 5 key and the display will prompt to continue typing the object number 23 40 57 W059 Specify the object NGC 5_ Now press the 5 key again and then press 7 23 41 02 BOS Specify the object NGC 55_ Nexus DSC wi
37. ll now show where to move the telescope to aim at NGC55 7 23 41 15 W059 NGC55 0h 14m 545 597 1469 srun 48 GALAXY IN SCULPTOR It shows that the telescope needs to be moved down by 6 9 degrees and counter clockwise by 59 7 degrees As you start moving the telescope the numbers will start updating Continue to move until both numbers are close to Os 23 42 06 W059 NGC55 0h 14m 545 0 01 10 01 x GALAXY IN SCULPTOR If you look through the eyepiece then you will see NGC55 there now To display additional information about the object just press 4 or gt key Nexus DSC User Manual 023 42 22 BOS NGC55 Galaxy in Sculptor also known as ESO 293 G 050 size 32 4 x5 6 magnitude 8 8 SB Pressing 4 C gt or will take you back to the previous screen If a description for the object fits on one screen then no scroll bar is displayed on the right Nexus DSC User Manual Nexus DSC s menus Settings Nexus DSC has a number of parameters that can be adjusted All of the adjustable parameters are stored in non volatile memory and will be used every time you turn Nexus DSC on Telescope Nexus DSC needs the mount type and encoder steps to be set correctly before it can be used to locate celestial object precisely The mount type and encoder steps are set in the Telescope Settings that can be accessed by selecting Setting from the m
38. lt 26 00 19 50 43 inFo P Sco oar f oc 99 UN DSC shows the current azimuth and altitude for the selected alignment object 2 and 6 above 3 Move the telescope until its azimuth T and altitude 8 match the ones of the alignment object 4 Make sure that the OK button on the screen is active flashing use to move to it if not Press key now 5 Perform the same steps 2 4 for the second alignment object 6 The alignment error should be very small Once Nexus DSC is aligned you can go to the main menu go to Find gt From Catalogue select an object from a catalogue and perform a GOTO Firmware Update The firmware update is performed using a USB memory stick formatted as FAT32 Download Nexus DSC firmware package from the Downloads section of our website Please read the release notes for the firmware package to check if you need to update the catalogues on internal flash memory The catalogues are updated using a microSD card The following steps describe the firmware update procedure Plug the USB memory stick into your computer and make sure that it is formatted as FAT32 Copy the firmware image nxdsc hex from uncompressed package to the USB memory Make sure Nexus DSC has more than 20 battery charge left e Turn Nexus DSC off Plug the USB memory stick into Nexus DSC s USB port Press and hold the button and turn Nexus DSC on 23 24 Wait for 5 seconds and rele
39. opied to the root of the micro SD card Once the observation list is copied to the micro SD card Nexus DSC will be able to guide you to an object from the list To find an object from an observation list is achieved by selecting Find gt From ObservationList 18 44 59 W05 y From Observation List Nexus DSC will show the currently selected observation list and the number of objects on the list Nexus DSC User Manual 1bi25 11 W075 Select list ap Number of entries 127 Pressing A Y key will select a different list 1b 25 27 W075 Number of entries Select list st3l 180 Pressing key now will select the first object from the list T 9152533 N55 NGC 1514 4h 9m 17 149 0 1 146 6 30 46 2 PLANETARY IN TAURUS 1 180 Pressing A Y key will select next previous object from the list 7152547 W075 HR3207 TA 102 6 169 2 arae DOUBLE STAR IN VELA 5 180 Please note that Nexus DSC will only be able to shown an object from the observation list if it exists in one of the Nexus DSC s databases Object at RA Dec Nexus DSC allows you to find an object whose coordinates are specified manually This mode can be used if you need to find an object that is not included in any of the Nexus DSC s databases You need to specify the coordinate of an object in J2000 epoch This mode is activate by selecting Object at
40. orts Alt Az Mounts Equatorial Platforms Supports a two star alignment Filter objects by magnitude constellation and object type Displayed angular resolution is 0 01 of a degree Internal FLASH memory contains a database of more than 61500 objects o Named stars o Bright stars o Planets Sun Moon o Full catalogues Abell Planetaries Arp Peculiar Galaxies Caldwell Collinder ESO Herschel full catalogue Hickson Compact Groups King LBN Messier Minkowski planetaries Markarian galaxies IC NGC Sharpless Stock Trumpler UGC Around 1 7 million objects are located on optional microSD card o HyperLEDA catalogue o Full Washington Double Stars catalogue Displays objects information magnitude size surface brightness spectral class double star separations galaxies morphology alternative names etc Identify function can also display up to 50 nearby objects Optional micro SD card contains a database of more than 1 7 million Supports a multi point telescope pointing analysis system for telescope pointing corrections Supports rotary encoders with up to 999999 steps per revolution Shows internal battery status remaining capacity current power consumption and percentage of charge remaining Can be interfaced to a tablet smartphone computer using a standards RS232 interface or optional WiFi interface Internal real time clock can be synchronised with GPS time Time display of local time UT
41. put voltage of 5V DC on any input and the inputs should never be driven to negative voltages below GROUND This will cause permanent damage to the internal circuits of Nexus DSC Nexus DSC only works with TTL Transistor Transistor Logic rotary encoders with quadrature output d 25 Menu Tree Main Menu 26 O18 42 58 M S 4 Q settings F 18 43 25 W75 eque CIO X Find F 18 43 28 W075 PA OAGDY XO Identify F 18 43 31 W75 Pr Q OXO Test F 18 43 34 W75 OQ d3 2 Q Utilities F 18 43 36 W075 dd Y XO Info Nexus DSC User Manual Settings Menu 7 018 42 58 W075 4 Q i3 settings FOis4ds45 BOS lt OF Telescope FO 18 43 47 ASE 0 10 Communications F 18 43 50 W75 LOF OC Time amp Date FO2140 40 75H CL USB FT 21 40 43 SE fal Serial 7 018 43 52 W75 lt OF6 WiFi FO18 43 54 MI17536 0 9 Display Keypad Nexus DSC User Manual 27 Align Menu F 18 43 21 W75 DO Y Align O 184403 NL17536 7 21 Altitude Reference T 18 44 06 BOS ALLOA First object alignment 7T 518 44 03 m75 AL MODE Second object alignment 7 218 44 13 W75 A OOOO Alignrnent Status 7 218 44 15 W75 1 106 Mpoint Start Foisddis ASE OAOA Mpoint Parameters 7 019 44 21 M S 6 60606
42. s DSC to external power to charge the battery The keys are not The keypad brightness level Change the keypad brightness illuminated is set to 0 level to a value other than 0 The charging status LED External power does not Connect Nexus DSC to a power is flashing meet the power source that meets the power requirements requirements Poor pointing accuracy The number of steps for Check that the encoder steps were encoder s was set incorrect set for the encoders used Nexus DSC User Manual 31 Problem Source of the problem Solution Pointing accuracy deteriorates with time Equatorial platform timer was activated Turn off the equatorial platform timer Encoder s count does not change in Test mode Poor connection to encoders Check that the encoders cable is properly inserted into Encoders port Faulty encoder cable Replace the encoder cable Faulty encoder s Replace the encoder s Encoder count does not always change the value when moving the telescope Encoder axle s slippage Tighten the grub screw on the encoder s adapter Faulty encoder cable Replace the cable Encoder count does not change the value when the telescope is ina certain position for example the azimuth encoder count does not change when the telescope is positioned between 200 and 205 Encoder s axle is tilted Adjust the encoder s mounting to avoid putting
43. shing LED is indicating an error power source is not supplying sufficient voltage and or current 3 The USB port acts as a USB host It cannot be used to connect Nexus DSC to a computer directly The USB port on Nexus DSC is used for Firmware updates Tointerface Nexus DSC to ServoCAT To interface Nexus DSC to SiTech motor controller 4 Serial port is a standard RS232 port 6P6C RJ connector It is used for the following purposes To connect Nexus DSC to a computer e To connect Nexus DSC to ServoCAT To connect Nexus DSC to SiTech controller 5 Encoder port is used to connect encoders using an 8P8C RJ connector 6 microSD socket is push in push out type Charge the battery The battery may not be fully charged at first It is advised to fully charge the battery Please use either the provided power adapter or one of the recommended power adapters to charge the battery It is also possible to use the supplied USB to DC 2 4mm cable to charge the battery from a power adapter with a USB socket The power adapter should be capable of supplying at least 1 5A at 5V otherwise it will take much longer to fully charge the battery in Nexus DSC Connect the power adapter to Nexus DSC and plug the adapter into a power point It is recommended to keep Nexus DSC turned off during charging to reduce charging time WARNING Do not connect Nexus DSC to an external power source that is not within VAN the specified voltage
44. t usually takes a short moment for Nexus DSC to generate the list Please note however that for big catalogues like PGC with more than 1 5 million entries the search may take a considerable amount of time and that depends on the number of objects in the vicinity of the current telescope coordinate and also on the value of the search radius Test Encoders This mode allows you to test the connection with encoders and also to make sure that the encoder steps are set correctly Select Test from the main menu 18 43 31 M S O Test Then select Encoders 18 45 16 W075 Encoders It will show you the current encoder steps and angles 22 06 17 4686 1112 RA AZ 191 30 Dec Alt 49 97 NI 555 In order for Nexus DSC to function correctly it is required to adjust the encoder steps to make sure that Nexus DSC User Manual the RA AZ current position in degrees is increasing when rotating the telescope clockwise around RA AZ axis e the Dec Alt current position in degrees is increasing when moving the telescope up in declination altitude If either of those values is not increasing then set the encoder steps for that axis to Reverse in the Telescope Settings Utilities Update Catalogues from microSD Nexus DSC stores most of catalogues on its internal flash memory As improvements are made to the firmware there may be a need to update the catalogues as w
45. talled on your telescope Encoder steps can be set by using the numeric keys on the keypad Please enable Reverse if required as described previously TOi51213 ME Mount Type Alt Az AZ Encoder steps 10000 6 Reverse ALT Encoder steps 10000 O Reverse Communications Communications menu allows to set parameters for serial port and USB port Please select Communications from the Settings menu Communications 18i43i4 M5 USB Nexus DSC User Manual USB port settings are set by selecting the USB menu 7 21 40 40 0 55 d USB Nexus DSC supports interfacing to ServoCAT through the USB port for performing GOTO commands from a planetarium application For third generation of ServoCAT you will need a USB cable supplied with ServoCAT for first and second generation of ServoCAT a USB to serial adapter is required the adapter must be based either on FT232 chipset on CP210x chipset or on PL2303 chipset Please contact Astro Devices for a list of compatible USB to serial adapters For operating Nexus DSC with ServoCAT it is necessary to set a few parameters e Communication protocol set to ServoCAT Baud rate set to 9600 Stop bits set to 1 Data bits set to 8 Parity set to None 7 0 22 15 11 E7595 Communication Protocol ServoCAT Baudrate 9600 Stop bits 1 Data bits 8 Parity None Serial Serial port parameters are set by selecting the Ser
46. to be fitted to your telescope in order to be able to locate celestial object with Nexus DSC Product Features Below is a short outline of main features of your Nexus DSC Technical specifications e CPU 32 bit MIPS 4K running at 80MHz M Memory 16MB internal FLASH External memory up to 64GB on micro SD card e 3 12 Red OLED screen 256x64 pixels with 32 levels of brightness Full numeric keypad with adjustable back light Real time clock with thermal compensation Built in GPS receiver with support for GPS and GLONASS Built in 5000mAh rechargeable Lithium battery Operating temperature range from 20 C to 50 C 5 F to 120 F Humidity 10 90 non condensing Optional WiFi interface o FCC CE IC certified 2 4GHz IEEE 802 11b g transceiver Supports Access Point and infrastructure WiFi networks Secure Wi Fi authentication schemes Class WiFi device up to 150 meters Uses 2412 2484MHz Unlicensed ISM band channels 1 14 e One RS232 port e One USB port Upgradeable firmware and catalogues firmware is upgraded using a USB memory stick Can be charged powered by an external power source of 5 16V DC can be charged from a cigarette lighter socket in a car Reverse polarity protection RoHS compliant e Size 140 x 120 x 30mm 5 5 x 4 7 x 1 2 e Weight 260g 90z O O00 Digital setting circles specifications e Intuitive graphical user interface Supp
47. ues 16 From Observation List 19 Object at RA Dec 19 From Planetarium eese eee 20 Te S A ER ERN 20 Uri 21 ECORI S osi T E ert TAL 21 UpdDsrrcew eR 21 Update Catalogues from microSD 21 lul ER 22 About Nexus DSC 22 pg 22 lord M buse 22 GPS PIS 23 Advanced TODICS iae erp pnan a 23 Nexus DSC User Manual Daylight Testing sessessseseeeeeeeeenen ene 23 Firmware Update 23 AOA S 25 Ports PINOUTS ccccccescceeecesseeeceeeseceeceueceeuseeesseeeseeseeegess 25 Seral BOSS 25 Encoders POFt oe eto side teen ee te Peek op eene OY ne He Rus 25 Men NEAR T T TM 26 Main Menu ns nnne nnn 26 Settings Menu 27 Align Menu nn 28 Find MON m 29 Test Menu EERIE 29 Info Manu eene 30 List of Compatible Planetarium Software 31 FREQUENTLY ASKED QUESTIONS FAQ 31 Troubleshooting issiria 31 lc 33 Technical SUDDOELU nimes 33 Introduction Nexus DSC is a digital setting circles computer with optional WiFi interface for your telescope It works with most popular telescopes on equatorial or Alt Azimuth mounts Nexus DSC is a very sophisticated device for locating celestial object in the sky Only two rotary encoders are required
48. while the back light has a range from 11 0 to 100 0 will turn the back light off while 100 is the maximum level To adjust the levels of brightness is access through Display Keypad 18 43 54 W05 Display Keypad which bring up the controls 7 221 42 23 M S DISPLAY BRIGHTNESS 7 KEYPAD BRIGHTNESS 10 OK Use 4 and amp keys to switch between Display and Keypad and A and Y keys to adjust the levels Once you have adjusted the brightness levels to the ones you desire move to OK button on the screen and press the key to save them Align Align menu contains all functions handling the telescope alignment e Altitude reference alignment First object alignment Second object alignment Alignment status Mpoint start Mpoint parameters Mpoint analyse Equatorial platform timer All alignment functions are accessed by selecting Align from the top level menu hs Align 18i4si2l W075 Altitude Reference The first step of the telescope alignment is to set the initial altitude reference It is done by selecting Altitude Reference from the Align menu 12 18 44 03 M 55 Altitude Reference Now you can select the initial altitude reference angle 21 43 04 M S Altitude angle 90 Telescope coordinates 358 74 88 20 The are three choices with the angle e 90 e 0 Custom 22 24 06 W075 Altitude angle
49. y objects from the specified constellation are shown Object Type only objects of the specified type are shown e Magnitude the top of the list will be at the object of the specified magnitude Disable Use this mode when you wish to locate any object from the specified catalogue After selecting a catalogue just press key twice 21 51 21 M S Messier Catalogue Disable Filter Now you can see the last selected object in the catalogue M74 d unas m 4425 2109 3 1323 i GALAXY IN PISCES You can go to previous next object in the catalogue by pressing A Y keys You can now move the telescope in directions of the arrows until the numbers become Os to point the telescope at the selected object Nexus DSC allows you to show additional information on the current object This information is accessed by pressing 4 or gt key 7021 53 36 W075 M74 Galaxy in Pisces also known as NGC628 size 10 5 x9 5 magnitude 9 4 SB 12 9 7 221 57 23 117525 NGC2808 Globular Cluster in Carina also known as ESO 91 SC 001 size 13 8 x13 8 magnitude 6 3 You can use A and Y keys to scroll the description up and down 7 021 57 25 W075 Carina also known as ESO 91 SC 001 size 13 8 x13 8 magnitude 6 3 SB 11 7 Globular 2157 27 7595 001 size 13 8 x13 8 magnitude 6 3 SB 11 7 Globular Other info GCL 13 To go to an object quickly an

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