User Manual v1.4 - Digital Instruments S.r.l.
Contents
1. Guest Account Settings Password Vir Username BEE Show characters W The default credentials are admin 2 admin admin guest gt guest guest About SNMP Read community string gt public Write community string gt public NANOREF Manual Rev 1 0 26 NANOREF MANUAL Custom Settings The device permits to have some ad hoc customizations through the unlock with particular activation codes Features NOT Available The features on this Panel are not available for this board f you would like to have more information about which are available for MXS EVO please visit or send us an e mail at Pulse Generation The device is able to generate a programmable pulse in place of the IRIG B DCLS signal on the BNC connector or the PPS signal Strobe Generator 1 The following parameters can be set lt Start Time gt HH MM SS lt Stop Time gt HH MM SS lt Repetition Rate gt MM SS lt Pulse Length gt SS ssss The system generates a sequence of pulses of lt Pulse Length gt length and repeating every lt Repetition Rate gt starting at lt Start Time gt and stopping at lt Stop Time gt Please note that the lt Start Time gt is always synchronous to the internal PPS eventually disciplined via an external source Clock Generation The device is able to generate two distinct programmable square wave clocks by dividing two different sources with integer dividers e 10 MHz e 16 32. NANOREF Disciplined RF Generator mme Rev 1 0 pi Digital NANOREF MANUAL Instrumenta Dichiarazione di conformit Declaration of conformity CE DIGITAL INSTRUMENTS S r l La Ditta i The Company Via Parco degli Scout 13 20091 BRESSO MI ITALY Dichiara con la presente che il Prodotto Herewith declares that the Product Tipo Type Disciplined RF Generator with Multiple Sources Modello Model NANOREF Serial Number 0150 Oggetto di questa dichiarazione conforme ai seguenti standard o norme della Comunit Europea Referred to by this declaration is in conformity with the following standards or normative documents of EC Norme Europee Armonizzate European Armonized Standards CEI EN 61000 6 4 2007 Electromagnetic compatibility EMC Part 6 4 Generic standards Emission standard for industrial environments CEI EN 61000 6 2 2006 Electromagnetic compatibility EMC Part 6 2 Generic standards Immunity for industrial environments CEI EN 55011 2011 Limits and methods of measurement of radio disturbance characteristics of industrial scientific and medical ISM radio frequency equipment CEI EN 61000 4 2 2011 Electromagnetic compatibility EMC Part 4 2 Testing and measurement techniques Electrostatic discharge immunity test CEI EN 61000 4 3 2007 A1 2009 A2 2011 Electromagnetic compatibility EMC Part 4 3 Testing and measurement tech
3. MHz ne potrebbe venire inficiata NANOREF Manual Rev 1 0 29 NANOREF MANUAL It s possible get an idea of potential obstacles that limit the visibility of the GPS constellation to the radio observing the polar graph of satellites after a few hours of persistence GPS DS GPS satellites SVID S N Azimuth Elevation IK Visible A Se Tracked O Li 3 2010 Digital Instruments All rights reserved Quality Factor Quality Factor is the operating parameter that indicates the quality of the GPS signal received by the antenna It is considered an acceptable value if gt 25 If the Q F is lower it is possible that there are problems with the GPS signal reception and this involves a greater number of holdover and therefore a less precise synchronization The value of the Quality Factor is shown in GPS tab of Main Panel Page PPS Status PPS Sune Antenna Position Quality NANOREF Manual Rev 1 0 30 NANOREF MANUAL Di Digital im instruments Statistics The device stores some useful statistical informations to evaluate the proper functioning over time Holdover Num Holdover Max Quality Min PPS Dist Max Pos Alarm Num shows the number of times that the GPS radio has entered into holdover mode in response to a problem under optimal conditions should be low shows the duration of the longer hold over under optimal conditions should be low indicates the smallest G
4. Main Panel the Valid led of the Frequency box should be green If not do eventually modify the expected frequency in the GPS EXT Config Panel e Presence of the Ext Timing signal In the Ext tab of the Main Panel the Valid led of the Time box should be green e Presence of the El signal In the EI tab of the Main Panel the Signal and Framing leds should be green e Presence of the PTP signal In the PTP tab of the Main Panel the Enabled led should be green and Status should display Slave e Presence of the IRIG B signal In the JRIG B tab of the Main Panel the Present led should be green and Date should display a valid date Automatich switchover In order to enable the automatic switchover is better to first check a few settings e Switchover policies It is possible to set different policies for the switch These policies can be set from the front panel Board Settings Policy from SNMP policy or from WEB in the Board Configuration page e Switchover treshold It is possible to set a treshold to wait before switching to another source These policies can be set from the front panel Board Settings PSwitchover from SNMP switchover or from WEB in the Board Configuration page e Disciplining mode It is possible to specify if the disciplining from the external frequency or from El has to be done in frequency or phase e Automatic switchover To finally enable the automatic switchover is possible to operate from the front panel Board Settin
5. Restarts the device Username Quest Password iere show characters I Save Admin Account Settings Username admin Password Shaw characters i save Permits to force a switch on a different source when the device is configured in manual switch mode To switch from the WEB interface just go the the View tab of the Main Panel and click on a source Manual Auto Allows to set the type of switching manual or automatic Disciplining Mode Selects the kind of tuning to use when discipling from da EXT or E1 reference The frequency tune is faster but loses the phase alignment of the PPS provided in output Policy Indica la politica attualmente utilizzata per la commutazione in modalita automatica Per avere maggiori NANOREF Manual Rev 1 0 18 NANOREF MANUAL Indicates the policy used to do switchovers Toh ave more details on the subject please consult the relative section Switchover Policies Switchover Allows to modify the switch over time For more details please consult the relative section Switchover Priority Set the priority of each source for the automatic switch a higher value means a higher priority 0 disables the source PPS Mute Inhibits the output of the PPS until the device has reached a synchronized status tipically a few minutes are needed PPS Allows to choose which signal to spread on the PPS connectors default is board PPS IRIG B IN Permits to choose the sou
6. bit 88 gt 25 Position Identifier Pg Eight most significant bits of time of day in straight binary seconds bit 90 gt 2 bit 97 gt 2 9 Position identifier Py Note Bits not listed are index markers and are sent as binary zeroes NANOREF Manual Rev 1 0 be Di igital NANOREF MANUAL imustruments It was also implemented part of the standard 1344 1995 The offset compared to the UTC time can be set using the Timezone of the apparatus Changes of DST or leap second are not currently notified always returned as 0 IRIG B Designation Explanation Pos ID i Year BCD I Last 2 2 digits of year in BCD PS 2 vee Ben BID OOO Ps2 3 _ Year BCD d CS e e ess 6 Year B BCD 10 P 60 sendi eee O feno EE Time offset sign O l Offset from coded IRIG B time to UTC time IRIG coded time plus time offset including sign equals UTC time at all times offset will change during daylight savings 4 b code representing approx clock time error 0000 clock locked maximum accuracy 1111 clock failed data unreliable Position kentifier The device can output an IRIG B DCLS signal It can also recognize an IRIG B DCLS signal via a BNC connector When the BNC connector is used it inhibits the external timing input NANOREF Manual Rev 1 0 sr 14 Di Digital NANOREF MANUAL Instruments Switchover Function ETS EVO allows the possibility to switch the disciplining of its internal
7. deve essere connesso tramite protezione con corrente nominale massima pari a 16A This unit may be operate from wide range AC supply networks from 95 Vac to 240 Vac fused with max 16A gt Lo strumento supporta alimentazione DC wide range da 20 Vdc a 50 Vdc e deve essere connesso tramite protezione con corrente nominale massima pari a SA Il circuito di protezione contro l inversione di polarit implementato a bordo This unit may be operate from wide range DC supply networks from 20 Vdc to 50Vdc fused with max SA Circuit against polarity inversion is also implemented Le condizioni di sicurezza vanno testate ad ogni sostituzione Ispezione visiva dei cavi stato dell isolamento corrente di dispersione stato del connettore PE e test funzionale A safety test must be performed after each replacement of part Visual inspections PE conductor test insulation resistance leakage current measurement functional test gt Non interrompere il conduttore PE in nessun caso Un interruzione del cavo PE rende l apparato elettricamente pericoloso It is not permissible to interrupt PE conductor intentionally neither in the incoming cable nor on the unit itself as this may cause the unit become electrically hazardous gt Ogni riparazione manutenzione e sostituzione del dispositivo deve essere eseguita unicamente da personale autorizzato dalla Digital Instruments Any adjustments replacements of parts maintenance or repair may be
8. message i Slave Clock tom t Follow_Up message containing value of t L t t n Delay_Req message KIK t Delay_Resp message containing value of t ts tty ty Once reconstructed the one way delay it is possible to use it to correct the clock of the slave and lock it to the master Below is shown the pattern of the loop relative to the clock tuning based on PTP master to slave W offset from delay master slave to rmaster tick rate delay gi adjustment Kernel FLL NANOREF Manual Rev 1 0 12 NANOREF MANUAL Instrumenta IRIG B The device can accept in input and provide in output on BNC and optical connectors an IRIG B stream of type 006 compliant with following code silla Information transmitted Position identifier Pp seconds boundary marker Units of seconds Tens of seconds Position identifier P Units of minutes Tens of minutes Gg Position identifier P Units of hours Position identifier P4 gt fr Units of days Position identifier P4 Hundreds of days Position identifier Ps Units of year or control function bits Tens of year or control function bits Position identifier Pa Control function bits Position identifier P Control function bits Position identifier Pa Nine lowest significant bits of time of day in straight binary seconds bit 80 gt 2
9. timebase selecting one of many sources This exchange can be configured to run automatically upon occurrence of an alarm condition such as PPS signal absence disconnection of the antenna error in the external source error in the E1 signal error in the PTP protocol error in the IRIG B signal In the log are reported the reason of the switch Mweb gt user defined switch from WEB Msnmp gt user defined switch from SNMP Mlcd gt user defined switch from LCD Mopto gt user defined switch from TLC Aser gt automatic switch due to serial connection lack of GPS Aant gt automatic switch due to connection lack of GPS antenna Apref gt automatic switch to the higher priority source Aext gt automatic switch caused by an error in the external signal Ael gt automatic switch caused by an error in the Elsignal Aptp gt automatic switch caused by errors in the PTP protocol Airigb gt automatic switch caused by an error in the IRIG B signal Switch Policies The NANORFF permits to chose the priorita of the various sources Priorita is bigger when the value is bigger 0 inhibits the source When the device is configured for automatic switchover two different policies can be used Switch amp Free The device switch to the best available source when an error is recognized on the actually selected source Switch amp Pref The device always switch to the source with highest priority currenlty available if valid In o
10. to enable the unicast mode currently under development PTP PTP Enable Masters Slave Set type IRIG B NANOREF Manual Rev 1 0 The only two settings related to the IRIG B block are the input selector IRIG B Mux and the Timezone 24 NANOREF MANUAL imustruments Event Log On the WEB is available the apparatus log from Event log section 50 entries are presented It is possible to delete the logs and save them in csv format Id Date Time Code Description os i2 09 di 003 PPS Al 03 12 09 41 003 PPS Al 09 12 09 41 003 PPS Al 09 12 09 di 003 PPS Al 03 12709 41 003 PPS Al osriz os di 003 PPS Al 09 12 09 150 O11 PPS Syncr wo do d Do A Ww h E e H BE H B H H B BP H D 0 JO Oo e H HO Events related to the board Event Code 001 Event Code 002 Event Code 003 Event Code 004 Event Code 005 Event Code 006 Event Code 007 Event Code 008 Event Code 009 Event Code 010 Event Code 011 Event Code 012 Event Code 013 Event Code 014 Event Code 015 Event Code 016 Event Code 018 Event Code 019 Power ON Switch PPS alarm Clock alarm GPS Serial Supply Switch Alarm GPS PPS GPS Antenna Bad Vtune PPS Syncr El Signal El Frame El PPS EXT Freq EXT Time PTP PPS IRIG B NANOREF Manual Rev 1 0 gt Apparatus on gt Switching on GPS EXT E1 source gt Alarm on PPS 1 4 gt Alarm on 10 MHz 1 4 signal gt Detection or loss of connectivity of the GPS rad
11. 34 IP 10 0 0 36 Metmask 20202400 Gateway 10 0 0 254 save RESET amp REBOOT RESET TO DEFAULT REBOOT THE BOARD Date amp Time Allows to view set the date and time of the apparatus Note that this will still be automatically updated to that received by satellite Timezone Allows to set the UTC offset for proper time visualization This setting determines the IRIG B time offset Guest Account Settings Allows to change the credentials of the user account see below for more details Admin Account Settings Allows to change the credentials for the administrator account see below for more details Board Config Panel Source Board ID Allows to define a name to the apparatus useful for identifying it on the network Trap Dest Allows to configure the destination server of the traps related to the events IP Allows to set up the IP address associated to the the specific network interface To activate the changes system needs to restart Netmask Allows to set the netmask associated to specific network interface To activate the changes system needs to restart Date amp Time Gateway Allows to set the gateway associated with specific network interface To activate the changes system needs to restart SU IR EE Timezone GMT 0 00 universa PF Save Month Day ear KA T Reset to default Restores the original configuration Reboot the board S Guest Account Settings
12. 84 MHz Please note that the rising edge of the resulting clock is synchronous to the internal PPS if the frequency is integer Clock Generatore 1 Clock Generatore 2 NANOREF Manual Rev 1 0 27 Di Digital NANOREF MANUAL imustruments First Run First Installation 1 Connect at least one of the possible sources GPS EXT E1 PTP IRIG B in the following way e GPS connect the GPS antenna cable to the proper GPS ANTENNA socket on the rear e EXT connect a frequency or time reference on the proper connector on the rear e El connect an E1 connector on the proper input socket on the back e PTP connect an ethernet cable to the ethernet port on the back network should be IEEE 1588 compliant for best performance e IRIG B connect a coax or optical connector on the proper sockects on the back and select the proper input in the IRIG B Mux selection 2 Connect the NANOREF to the power grid Checkup After power on it is possible to connect with the device via WEB by using a common browser at the address http lt board_ip gt The default credentials are administrator read and write gt admin admin guest read only gt guest guest From here it s possible to check e Presence of the GPS antenna In the GPS tab of the Main Panel the Antenna led should be green and after a few minutes from the boot the PPS Status led should become green too e Presence of the Ext Frequency signal In the Ext tab of the
13. E 000000 g A id BNC BNC Left Power Right Power RS 232 El EXT PE Terminal Connettor Tx Time Supply e Supply e A The NANOREF does not provide any supply switch NANOREF Manual Rev 1 0 da NANOREF MANUAL imustruments Connectors details TLS connector Remote signals 1 OOO00000 The 8 poles TLS connector provides the following information on the various pins from left to right PIN 1 Common contact PIN 2 Closed contact gt Power supply provided PIN 3 Closed contact gt GPS reference present and valid PIN 4 Closed contact gt Selected reference present and valid PIN 5 Closed contact gt Synchronization completed TLC connector Remote controls 1 00000000 The 8 poles TCL connector provides the following commands on the various pins from left to right PIN 1 2 Closed contact gt Manual switch PIN 3 4 Closed contact gt Automatic switch PIN 5 6 Closed contact gt Switch over previous reference PIN 7 8 Closed contact gt Switch over next reference NANOREF Manual Rev 1 0 85 Di Digital NANOREF MANUAL Instruments Main Operation The main purpose of the NANOREF is to provide stable output signals of Time PPS E1 IRIG code NTP PTP and Frequency 10 MHz 2 048MHz and to enable the synchronization of the network This is allowed by the application of algorithms tuning an high stability internal oscillator Peculiarities of the ETS EVO is the possibility to accept inpu
14. EA 7 CIO EE 8 EEE CL EE 9 dI ARI AO 9 aaa 9 ln 10 Pz 11 PIP I EE 12 IR Le EE 13 Switchover ITT VIE 15 e e 15 Switchover Treshold aaa 15 MED Interi CE EN 18 REI AR 293 ORI LELE RR 26 WE II E 26 RELITTI SE EE TT EE 28 Appendix A Quality Factor 29 RN TTT TO 29 EENEG 29 46 fe CEE 30 SI RR OCRA 31 EE EE 31 App ndix C Changelog dt en eee ee a eiii ee adinik eee eee ee eee oe 32 ee 34 NANOREF Manual Rev 1 0 5 Di Digital NANOREF MANUAL Instruments Summary This manual provides to the user of the apparatus NANOREF all the information necessary for proper operation The informations include the normal installation procedures and any data on the maintenance and programming in order to facilitate interventions in the field NANOREF is a multiple output signal generator able to reconstruct stable time frequency references 10MHz PPS 2 048MHz E1 IRIG B It is composed of a GPS receiver and accepts in input a frequency RF signal a timing RF signal an EI multiframe signal and an IRIG B signal It is possibile to use any or all of these references tot une the internal high stability OCXO In the standard version there are 12 independent programmable outputs in any of the possible configurations 10 MHz PPS 2 048 MHz E1 IRIG B AM IRIG B DC 1 El input and 1 El output 1 time input and 1 frequency input 1 TTL IRIG B input may be used in place of the external timing input NANOREF i
15. LD 20 S88 4604 H Cao 4608 aaa cao 16060 Time CS 12060 14060 16060 15000 NANOREF Manual Rev 1 0 31 NANOREF MANUAL Appendix C Changelog Release 1 0 march 2012 e First release as per MXS EVO 1 0 Release 1 1 september 2012 e Update release as per MXS EVO 1 7 Release 1 2 november 2012 e Added timing informations over El NANOREF Manual Rev 1 0 Instrumenta G e NANOREF MANUAL imstruments Assistance For support requests please download the form from the website http www digital instruments it ita assistenza php Compile it in its entirety by specifying as precisely as possible and giving as many details as possible about the type of fault detected You can then send the form to riparazioni digital instruments com via fax to 39 02 66506103 or enter it directly into the box when sending goods for repair You can also contact us at 39 02 66506250 Monday to Friday from 9 to 13 and from 14 to 17 GMT 1 Time NANOREF Manual Rev 1 0 33 NANOREF MANUAL Programmable outpts Outputs Signals Output impedance Output connector Frequency Reference Signal Spectral Purity Phase noise Output level Output impedance Output connector Stability Time Reference Signal Output level Output impedance Output connector GPS Section Receiver Tracking PPS accuracy Antenna connector Collection time External Section Frequency Reference Standard frequencies In
16. PPS and the PPS generated by OCXO Available Settings NANOREF allows the possibility to set the device as a supplier of synchronization signal E1 E1 Master in case where it s connected to valid synchronization sources GPS cesium oscillator etc or as a sevice receiver of El synchronization signal E1 Slave In the first case it is also possible to choose the quality of the source according to the table of Recommendation G 704 ITU T Quality Value Description of Sync Quality Level ec Displayed See 2 G8II Recommendation G 811 _ 2 Reseved y yO 4 SSU A_ SynchronizationSupplyUnit A Note D 5s Reserved 6 Reserved fF 7 Reserved fe __8__ SSU B Synchronization Supply Unit B Note 1 2 Reserved fe 10 Reserved fF 12 Reserved fF D Reserved fF p14 Reserved fF Note 1 In previous versions was used the terms G 812 transit and G 812 local for more information see Rec G 812 ITU T NANOREF allows to choose on which of the 30 from 2 to 32 excluding 17 timeslots of the E1 frame transmit the PPS signal As default the signal is sent and received on timeslot 32 The timeslots 1 and 17 are used to send sync and control data by El The PPS is implemented by putting up only the LSB of the selected timeslot NANOREF allows to test the quality of the physical channel on which the El signal is transmitted activating the Bit Error Rate Test in reception and or transmission and choosi
17. PS antenna quality factor recorded under optimal conditions should be high indicates the maximum distance affected by the PPS generated by the GPS radio under optimal conditions should be low indicates the number of times that there was a wrong geo positioning under optimal conditions should be low It s a good idea to reset the stats before a capture session because some values may be spurious in the first phase of synchronization or acquisition of satellites by the GPS radio A Automatic Site Survey In certain situations it may be convenient activate the Positioning Mode of GPS radio in Automatic Site Survey In this mode the radio privileges the accuracy of temporal information at the expense of that position as long as the antenna is not moved so as to preserve signal integrity PPS in limited visibility conditions or in the GPS constellation or in presence of potential sources of interference If there are problems or abnormalities during the first installation or after moving the unit in a distant geographic location GPS radio can be resetted by deleting the almanac and positioning information that is saved by the appropriate entry in the GPS menu Should be also necessary to reset the device in Automatic Site Survey mode since the radio after completing the survey which takes about 3 hours automatically returns to Position Hold mode PPS Jitter 448 rea Jitter tne 188 SA I AS POSITION HO
18. any servers widely available making it a very smart choice for time synchronization 8 Oe OH Ls Internet Be K Pipe ee Gei r The device supports NTP server version 4 that distributes the synchronous time related to an external time reference typically GPS PTP or IRIG B Currently is necessary to enable the PTP support in order to use its internal hardware counter even for NTP When the PTP protocol is not being used it can be set on SLAVE in order to free network resources NANOREF Manual Rev 1 0 sr LE NANOREF MANUAL imustruments PTP IEEE 1588 The NANORFF supports the IEEE 1588 2008 version 2 also known as Precision Time Protocol both as master and slave When connected to an appropriate device compatible to the IEEE 1588 standard is able to synchronize the slave apparatus with a precision well below the micro second Note that using network switches non compliant with IEEE 1588 variable delays in the order of some tens of microseconds are introduced as noted in the official website of the Protocol http ieee1588 nist gov switch htm The IEEE 1588 bases its operation on the calculation of the transit time of PTP packets from the master to the slave and slave to master These latencies are calculated using a simple exchange of messages between master and slave that are associated with timestamps managed at the hardware level Master Clock Time Slave Clock Time Data at Sync
19. be set in the GPS Configuration whilst Latitude Longitude and Height cannot be set by WEB but only from SNMP or front panel GPS PPS Status ie 400 Hi Antenna i Antenna ES Polar peu Visible Sat B Tracked Sat Data Mode Normal Position Height roti 207 Latitude 45 32 33 Longitude 9511 42 NANOREF Manual Rev 1 0 21 4 NANOREF MANUAL Instruments The satellite view can be opened by pressing the Polar view button w GPS Gs ARR i Dargatzerar DA AS nimun 234 Oil kariert AE righbo Moarra i EXT Frequency Ref It allows to display the frequency reference expressed in Hz which is currently supplied as an input to the apparatus and if this value has been accepted Its acceptance or not depends on the value set as acceptable and on tolerance viewable by pressing Time Ref Allows to display the time reference expressed in PPS pulse per second or in ms currently supplied as input if this value has been accepted Its acceptance or not depends on the value set as acceptable and on tolerance viewable by pressing It also indicated the time delay TD of the external time reference and measured respect to the PPS signal outputted from the apparatus These values are displayed in the EXT tab of Main Panel Frequency Time Walue Walue valid valid Accepted 1 PPS Accepted Settings Allows to set the eligible values for the time and frequency reference between
20. carried out only by authorized Digital Instruments technical personnel gt Assicurarsi che ogni collegamento con dispositivi informatici sia eseguito secondo IEA950 EN60950 Ensure that the connections with information technology equipment comply with IEC950 EN60950 NANOREF Manual Rev 1 0 alia Di Digital NANOREF MANUAL Instruments Simboli di sicurezza Safety Symbols Sono presenti sul dispositivo e nella documentazione simboli utilizzati per la segnalazione di segnalazione conformi alle specifiche IEC61010 1 II Safety related symbols used on equipment and documentation comply with IEC 61010 1 II e SIMBOLO DIRECT CURRENT IEC 417 N 5031 Vdc may be used on rating labels e SIMBOLO ALTERNATING CURRENT IEC 417 N 5032 For rating labels the symbol is typically replaced by V and Hz as in 230V 50Hz e SIMBOLO PROTECTIVE CONDUCTOR TERMINAL IEC 417 N 5019 This symbol is specifically reserved for the PROTECTIVE CONDUCTOR TERMINAL and no other It is placed at the equipment earthing point and is mandatory for all grounded equipment e SIMBOLO CAUTION ISO 3864 N B 3 1 used to direct the user to the instruction manual where it is necessary to follow certain specified instructions where safety is involved Changelog Note ata 12 11 2012 NANOREF Manual Rev 1 0 di igital AL Instrumenta NANOREF Disciplined RF Generator with Multiple Sources NANOREF MANUAL Index pe UMMM EE 6 e TEE 7 LARA RR E
21. d on the LCD screen below the status of each source the delay expressed in nanoseconds between the PPS generated from the apparatus output and the three different tuning sources To correctly perform the characterization of various sources it s good configure the equipment with the following settings e Manual mode exchange e GPS Source selected It s good pratice also expect that the PPS generated by the radio is valid and that its delay is close to 0 ns visible from GPS gt status NANOREF Manual Rev 1 0 16 NANOREF MANUAL AL Instrumenta It is also possible display the progress of these distances over time using the button Distance Chart in the Main Panel GPS EAT El 25 564 29 139 27 414 26 659 25 964 24 239 24 514 23 789 23 064 22 339 21 614 20 959 20 164 19 439 13 714 17 959 17 264 16 539 15 814 15 089 14 364 13 639 12 914 12 159 11 464 10 739 10 014 9 209 o 064 7 039 7 114 6 309 2 664 4 939 4 214 3 489 2 764 2 039 1 314 299 1326 o San T i O 6 12 18 24 30 36 42 48 34 60 66 72 FSR 84 90 96 102 108 114 120 126 132 136 144 NANOREF Manual Rev 1 0 17 NANOREF MANUAL WEB Interface The NANOREF is managed by the network using a common browser by simply connecting to the associated IP address Network Configuration Panel Network Board ID BOARD Trap Dest 0 0 0 0 IF 197 165 200 36 Metmask 20 20424 Gateway 192 169 200 2
22. f the 2 power supplies left and right OFF gt power supply inactive Power Supply Status ON gt power supply active AC Left AC Right NANOREF Manual Rev 1 0 20 NANOREF MANUAL GPS Status Displays some informations about the GPS radio If present and its time delay in respect to the internal PPS Positioning Mode Permits to set the way in which the GPS module should calculate its geographical position If extract it from the information collected from the satellites or using the one given by the user The Altitude Hold mode may not be available on every GPS module Latitude Permits to view set the latitude of the GPS antenna Longitude Permits to view set the longitude of the GPS antenna Height Permits to view set the height of the GPS antenna Cable Delay Permits to set the length of the antenna cable connected to the GPS module so to compensate the delays introduced by the signal propagation Show Ch Status Shows the status of the channels of the GPS receiver The snr the elevation and the azimuth of the visible satellites are reported To cycle through the various channels use keys and 7 Show Global Info Shows some info about the GPS module Visibile Sats gt the number of visible satellites Tracked Sats gt the number of tracked satellites PPS Status gt the status of the PPS signal Antenna gt the status of the antenna All these variables are reported in the GPS status window Cable Delay can
23. gs Manual Auto from SNMP switchMode or from WEB in the Board Configuratio page NANOREF Manual Rev 1 0 28 NANOREF MANUAL imustruments Appendix A Quality Factor General Review This appendix is intended to illustrate the meaning and motivation of the introduction of the Quality Factor within the Digital Instruments equipments Although the installation of a GPS device is relatively easy it can hide certain issues that in some cases it can affect the proper functioning It is therefore expected to monitoring certain operating parameters so as to make immediate validation of a Circuit or finding the source of any problems GPS antenna positioning GPS antenna should be positioned on a tower or on a roof with a good view of the GPS satellite constellation O LI GOOD BAD POSITIONING POSITIONING If not the algorithm of regulation may not behave optimally and short term stability of the PPS and 10 MHz references it could be invalidated It s possible to evaluate the goodness of the positioning of the antenna in some ways 1 checking the power of received signal from each satellite from the Polar Plot 2 checking and verifying that the Quality Factor is acceptable typically gt 25 3 checking that the PPS generated by the radio PPS Status is valid green LED Se cos non fosse l algoritmo di disciplinamento potrebbe non comportarsi in maniera ottimale e la short term stability dei riferimenti PPS e 10
24. io gt Insertion or removal of a power supply L R gt More than 3 exchanges in less than 5 minutes gt Status change of PPS from satellite gt GPS antenna connection or disconnection gt Vtune incorrect value gt Sychronization completed gt Change in the status of the presence of the E1 signal gt Change in the status of the presence of the E1 framing gt Change in the status of the presence of the E1 PPS gt Change in the status of the presence of the EXT frequency gt Change in the status of the presence of the EXT time gt Change in the status of the PPS rebuilt by PTP gt Change in the status of the presence of the IRIG B signal 25 NANOREF MANUAL SNMP Trap Management For each event related to the board is generated a trap in parallel parallel to the machine set under TrapDest The trap number reflects the event number and the contents of the SNMP variable associated contains the details for example the channel referred to the event User Account The main user who has access to the apparatus is the administrator He is able to change its credentials under Account Settings Account Settings Usernarmme Whale Password ida It s possible set a user account that is able to use the apparatus remotely in read only mode without the possibility of changing its configuration The username and password for this guest account can be set by the administrator under Guest Account Settings
25. lignment is lost With the timing input only the phase disciplinino mode is supported This behaviour can be set under Disciplining Mode When both a frequency and time references are given the latter ha more priority and is automatically chosen to mantain a phase alignment NANOREF Manual Rev 1 0 O Di Digital NANOREF MANUAL Instruments EI The E1 signal standardized by the European Conference of Postal and Telecommunications Administrations CEPT and subsequently adopted by the International Telecommunication Union Telecommunication Standardization Sector ITU T operates at a nominal value of 2 048 Mbps and is widely used in digital telecommunications worldwide with the exception of USA and Canada where the T1 signal is in use and Japan where is in use the J1 The E1 link operates on two separate coaxial cables Rx and Tx Also in this case it s possible perform a rapid frequency locking with the 2 048 MHz reference of E1 signal setting the Disciplining Mode voice to the frequency value Status Informations NANOREF allows to view the status of the E1 module through the following values e Presence or absence of El signal e Presence or absence of E1 framing e SSM Quality Rec ITU T G 704 see below of the synchronization source e Bit Error Rate is calculated by the BERT see below BERT Irq Array binary array of interrupt requests that triggered errors generated in BERT see below Delay between the El
26. ng which of timeslots except for the one used for the PPS and advising against the first where the sync data are sent to receive and or send the signal for the test The form NANOREF Manual Rev 1 0 10 NANOREF MANUAL of the Bit Error Rate Test can generate and detect pattern both pseudo random and repetitive It s used to test and stress the channels of communication data Has been set the pseudo random pattern QRSS for testing The apparatus allows to show the value of the bit error rate and the log of interrupts that have generated errors in the BERT the latter is defined thus OX1X2X3X4X5X60 where e XI passes from 0 to 1 occurs when the reception of an error e X2 passes from 0 to 1 when an overflow occurs in the counter total BERT e X3 goes from 0 to 1 when an overflow occurs on the BERT error counter e X4 changes from 0 to 1 when received 32 1 row e X5 goes from 0 to 1 when received 32 0 row e X6 from 0 to 1 when there is loss of synchronization NANOREF allows to choose which column from 4 to 8 of bits use to transmit the value of the signal quality By default this value is sent and received on the column 8 NTP The NTP Network Time Protocol is a well established standard for synchronization of PCs and other devices on the Internet or an Intranet network The accuracy of the order of tens of milliseconds can be considered adequate for most situations Its flexibility and strength thanks to the m
27. niques Radiated radio frequency electromagnetic field immunity test CEI EN 61000 4 4 2006 A1 2010 Electromagnetic compatibility EMC Part 4 4 Testing and measurement techniques Electrical fast transient burst immunity test CEI EN 61000 4 5 2007 Electromagnetic compatibility EMC Part 4 5 Testing and measurement techniques Surge immunity test CEI EN 61000 4 6 2011 Electromagnetic compatibility EMC Part 4 6 Testing and measurement techniques Immunity to conducted disturbances induced by radio frequency fields CEI EN 61000 4 8 1997 A1 2001 Electromagnetic compatibility EMC Part 4 8 Testing and measurement techniques Power frequency magnetic field immunity test CEI EN 61000 4 11 2010 Electromagnetic compatibility EMC Part 4 11 Testing and measurement techniques Voltage dips short interruptions and voltage variations immunity tests CEI EN 60204 1 2006 A1 2010 Safety of machinery Electrical equipment of machines Part 1 General requirements Bresso October 2012 DIGITAL INSTRUMENTS S r l Via Parco degli Scout 13 20091 BRESSO MI ITALY Marco Genova Quality Assurance Manager NANOREF Manual Rev 1 0 Di Digital NANOREF MANUAL Instruments Istruzioni di sicurezza Safety Instructions Il dispositivo stato progettato costruito e collaudato in conformit alle normative richiamate nel Certificato di Conformit ed stato rilasciat
28. o dal costruttore completamente testato secondo gli standard di sicurezza Per mantenere questa condizione e assicurare la sicurezza d uso l utente deve osservare tutte le istruzioni e segnalazioni di pericolo descritte in questo manuale This unit has been designed and tested in accordance with the EC Certificate of Conformity and has left the manufacurer s plant in a condition fully complying with safety standard To maintain this condition and to ensure safe operation the user must observe all the instructions and warnings given in this operating manual gt Prima di mettere in servizio il dispositivo leggere attentamente ed integralmente le istruzioni per l uso Osservarle e seguirle in tutti i punti Provvedere in modo che le istruzioni per l uso siano sempre accessibili a tutti gli addetti Prior to switching on the unit please read carefully the instructions on the manual Keep this manual available for all every user of this equipment gt Il terminale PE sul dispositivo deve essere connesso al conduttore PE prima di eseguire qualsiasi altra connessione L installazione ed il cablaggio devono essere eseguiti da personale tecnico qualificato The PE terminal of the unit must first be connected to the PE conductor on site before any other connections are made Installation and cabling of the unit to be performed only by qualified technical personnel gt Lo strumento supporta alimentazione AC wide range da 95 Vac a 240 Vac e
29. put level Time Reference Standard periods Input level Input impedance Input connector E1 Section Standard signal Input Output impedance Input Output connector PTP Section Protocol Role Time stamping Precision NTP Section Protocol Role Time stamping Stratum Precision NANOREF Manual Rev 1 0 Di Digital Instruments Technical Data 6 PPS IRIG B DCLS IRIG B AM EI 2 048 MHz 10 MHz 50 Q BNC 10 MHz sine wave 70 dBc harmonic 75 dBc non harmonic 125 dBc at 1kHz 13 dBm 50 Q BNC le 12 daily average OCXO locked to GPS on SA le 10 daily average OCXO free run 1 PPS 100us Duty Rising Edge TTL 5 Vpp Square wave 50 Q BNC 12 Channels L1 1575 42 MHz Correlation on 12 satellites lt 50 ns on SA TNC lt 4 min 1MHz MHz 2 048MHz 5 MHZ 10 MHz From 2 dBm to 16 dBm sine wave 1 PPS TTL 5 Vpp square wave 50 Q BNC E1 256S multiframe 16 frame for each multi frame CRC 4 150 BNC IEEE 1588 2008 PTPv2 Grandmaster clock source GPS or slave Hardware lt l us NTP version 4 Grandmaster clock source GPS Software 1 lt 10 ms 34 NANOREF MANUAL IRIG Section Format Modulation Frequency Information sent Connector Signaling Network connection Signaling Serial Connection Remote signalling Remote controllers Supply Input Network Sizes Width Depth Weight Accessories NANOREF Manual Rev 1 0 Di Digital Instrumenta B P
30. rce of the IRIG B input signal BNC or OPTICAL IRIG B OUT Allows to choose which signal to spread on the IRIG B BNC connectors default is IRIG B Positioning Permits to change the position of the device retrieved from GPS if available Switch Mode Priority SL RISE Switch Policy PTF Switch and Pref Switchover Walue Discipline Made Value Phase e Haldover IRIG B IN Walue IRIG B OUT PPS Mute Value on Qo Positianing Latitude Longitude Altitude 45 542930 g 3 195100 S 206 450000 m NANOREF Manual Rev 1 0 19 NANOREF MANUAL Board Status OVERVIEW IRIG B TO 225 ns Overview Permits to view the status of all the sources alongside their time reference cvomparison with the internal reference Info Displays the name of the device and the corresponding software release Board Info The ZD field can be customized by the user to track the device ID BOARD l l l l l Ma me MXS EVO These informations are displayed in the Board Info panel of the main page of EZE the WEB interface Disciplining PPS Sync Shows the current disciplining value given to the internal oscillator and the synchronization status These informations are reported in the PPS Sync and Vtune values on the Main panel TLC Shows the status of the 4 TLC 0 gt TLC inactive 1 TLC active TLS Shows the status of the 7 TLS O gt TLS inactive 1 gt TLS active Supply Shows the status o
31. rder to avoid the possibility of continuos alarms due to intermittent switches there is a check that does not permit to switch more than 3 times in 5 minutes by automatically lowering the policy Switch amp Pref gt Switch amp Free This event has been given the following code Event Code 007 Switch Alarm Done more than 3 switches in less than 5 minutes Switchover Treshold This variable allows to define a time interval in seconds that must elapse between the time when an error has been identified and when it will be exchanged effectively If during this time the error will disappear the exchange will be deleted NANOREF Manual Rev 1 0 e Las NANOREF MANUAL Characterization of Sources NANOREF was also designed to compare the quality of the different sources provided to apparatus analyzing the ratio Af f variation of the frequency value on the nominal frequency of each source This analysis is supported by a graph that can be generated by the Stability Chart button in the Main Panel which shows the trend of these ratios over time The step used is 5 minutes while the values are expressed in nanoseconds EP tt ei 260 S 240 220 200 180 160 140 120 100 80 60 40 20 D Wives 20 L Su A0 E 80 100 120 140 160 180 200 220 240 260 0 10 20 30 40 50 DU 70 DU Du 100 Moreover is also possible display both on web interface the View section of Main Panel an
32. s a very flexible solution suited to all those applications where is necessari to provide a stable time frequency reference to multiple devices whilst mantaining electrical isolation When an error on the selected source is observed an error condition is generated via SNMP and dry contacts and a new source is selected between the available ones as per user configured priority NANOREF is quite simple to use and to set up Every function can be accessed remotely via WEB or SNMP NANORKFF gives informations about its internal status via 7dry contacts placed on the rear panel and the LEDs on the front panel NANOREFEF has double Power Supply Unit to ensure best safety and uninterrupted work NANOREF is in metallic box of sizes 1U 19 for rack installation Note This document may contain confidential and or reserved material of property of Digital Instruments S r l It cannot be reproduced used or shown to third parties for any other scope than the intended one WARNING Before inserting the power supply please carefully read all instructions for proper installation NANOREF Manual Rev 1 0 De Di igital NANOREF MANUAL Instruments Front View The front panel appears as shown in the following figure Rear View In the following feature is depicted the back of the apparatus NANOREEF with the position of connectors BNC BNC BNC BNC TNC Antenna Ethernet El EXT 10 PPS GPS Connettor Rx Freq MHz O ce JIO Mn
33. t from four different sources 1 GPS 2 EXTERNAL REFERENCE 3 El 4 PTP IEEE 1588 5 IRIG B In this manner it is possible to switch from one source to another if a fault occurs The strong difference between the various sources is a major strength as it makes the same apparatus both very flexible to suit the needs of the customer and very strong in order to better cope with possible failures of a type of source for example the loss of accuracy of the GPS signal Even in case of a switch references of Time Frequency provided are kept stables GPS The apparatus is internally equipped with a GPS receiver especially suitable for use as a time reference The GPS receiver is able to reproduce the local PPS signal relative to UTC second with a precision of typically 100 ns With this feature is possible to regulate the internal oscillator apparatus for producing a high stability output signals External Reference EXT The NANOREF accepts a frequency input and a timing input on two distinct BNC connectors These are the frequencies recognized e 1MHz e 2MHz e 2 048MHz e 5 MHZ e 10MHz This are the timing values recognized e 1PPS The device when using the external frequency reference as source generates the internal PPS based on the last received timing pulse from another reference It is possible to tune the internal OCXO in phase slower but keeping phase alignment or in frequency much faster but the phase a
34. the pre set NANOREF Manual Rev 1 0 22 NANOREF MANUAL These values are configurable by the GPS EXT PTP Config Panel EXT Frequency Time Walue O Hz Value O ms Walid Walid Accepted 10000000 e E Accepted 1 PPS e El For informations concerning the E1 status variables see paragraph E1 and specifically subsections status information and settings available In the web interface it s possible view the values of state variables of the settings in Tab E of the Main Panel while is possible change the settings on the E Config Panel El Rx SSM Quality 15 DON T USE Overview PPS Channel 32 Ctatys BERT Status Framing BERT Channels Wf E E 00 6 0758 BERT Output Bit Error Rate O OE 00 GI 12 13 14 15 16 BERT IRQ ala a Bea Boo a a Lea 17 18 19 20 21 22 23 24 25 26 27 26 29 30 31 32 NANOREF Manual Rev 1 0 23 NANOREF MANUAL PPS Timeslot Master Slave 00 Unknown e Rx BERT Channels 1 23 4 5 6 7 9 10 11 e 135 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 PPS Offset i S z e E d i 55M Column a a 5 BERT Status Tx BERT Channels 1 2 3 4 5 6 7 D 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 PRS Insertion Value It is possible to enable or disable the PTP protocol and chose the role of the device master or slave slave e From the front panel is also possible
35. ulse width modulated DC TOY BCD Year BCD BNC electrical N 1 Ethernet 10 100 interfaces TCP IP protocol N 7 led on front panel RS 232 connector DB9 Male 15 kV ESD 4 Dry contact on Weidmuller connector with 3 5 mm step 4 Dry contact on Weidmuller connector with 3 5 mm step N 2 independent supply 95 Vac lt gt 240 Vac Plug IEC320 integrated filter EMI RFI 1 Unit 19 300 mm without connectors 1 5 Kg 1 x GPS Antenna 1 x 30 m Belden PRG 7 Cable 2 m Cordon for network supply Handbook in English 35
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