Digital Instruments MXS-EVO Manual Manual Download | Manualshive

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MXS-EVO

Disciplined RF Generator

Rev 1.7

1
2
3
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Summary of Contents for MXS-EVO

Page 1: ... MXS EVO Disciplined RF Generator Rev 1 7 ...

Page 2: ...ty 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 techniques 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 ...

Page 3: ...d technical personnel Lo strumento supporta alimentazione AC wide range da 95 Vac a 240 Vac e 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 Lo strumento supporta alimentazione DC wide range da 20 Vdc a 50 Vdc e deve essere connesso tramite protezione con corrente...

Page 4: ...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 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 Rev Note Data 1 0 First rev...

Page 5: ... IEEE 1588 13 IRIG B 14 Date and time 15 Switchover Function 16 Switch Policies 16 Switchover Treshold 16 Graph Menu 19 WEB Interface 22 Event Log 30 SNMP Trap Management 31 User Account 31 Custom Settings 32 First Run 33 Appendix A Quality Factor 35 General Review 35 GPS antenna positioning 35 Quality Factor 36 Statistics 37 Automatic Site Survey 37 Appendix B FAQ 38 Appendix C Changelog 41 Assis...

Page 6: ...ut may be used in place of the external timing input MXS EVO is 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 availab...

Page 7: ... enter the main menu of the MXS EVO Rear View In the following feature is depicted the back of the apparatus MXS EVO with the position of connectors The MXS EVO does not provide any supply switch Digital MXS EVO Instruments 1 1 IRG PTP E1 EXT GPS 23 01 12 16 21 29 Device name Product version Date and time Selected source Keyboard RS 232 Connettor TNC Antenna GPS TLC PE Terminal Programmable Output...

Page 8: ...nt and valid PIN 8 Closed contact Synchronization completed TLC connector Remote controls 1 The 8 poles TCL connector provides the following commands on the various pins from left to right PIN 1 2 Closed contact Manual switch PIN 3 4 Closed contact Automatic switch PIN 5 6 Closed contact Switch over previous reference PIN 7 8 Closed contact Switch over next reference Programmable outputs A tecnhic...

Page 9: ... cannot be altered Twelve connectors have instead customizable functions by means of a DIP switch matrix placed on the PCB inside the device Even if modifying the outputs is simple is suggested to first contact the factory in order to avoid voiding the warranty by opening the device ...

Page 10: ...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 MXS EVO accepts a frequency input and a timing input on two distinct BNC connectors These are the frequencies recognized 1MHz 2MHz 2 048MHz 5 MHZ 10 MHz This...

Page 11: ...ization sources GPS cesium oscillator etc or as a sevice receiver of E1 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 Level Value Displayed Description of Sync Quality Level 0 Unknown Quality Unknown existing synchronization network 1 Reserved 2 G 811 Recommendation G 811 3 Rese...

Page 12: ...ich 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 ...

Page 13: ... 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...

Page 14: ...MXS EVO MANUAL MXS EVO Manual Rev 1 7 14 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 ...

Page 15: ...ways returned as 0 The device can output both an IRIG B DCLS and IRIG B AM signals It can also recognize an IRIG B DCLS signal via a BNC or optical connector When the BNC connector is used it inhibits the external timing input Date and time The device disciplines its internal clock from the selected reference GPS PTP IRIG B NTP and distributes it with the following rules NTP UTC timebase as per st...

Page 16: ...n the PTP protocol Airigb automatic switch caused by an error in the IRIG B signal Switch Policies The MXS EVO permits to chose the priorità of the various sources Priorità 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 Free The device switch to the best available source when an error is reco...

Page 17: ...used is 5 minutes while the values are expressed in nanoseconds Moreover is also possible display both on web interface the View section of Main Panel and 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 goo...

Page 18: ...MXS EVO MANUAL MXS EVO Manual Rev 1 7 18 It is also possible display the progress of these distances over time using the button Distance Chart in the Main Panel ...

Page 19: ...r it by pressing the RIGHT key By entering a menu is possible to view all of its associated submenus by pressing the UP and DOWN keys The RIGHT key permits once again to enter the selected submenu in the view mode By pressing RIGHT again is possible to modify the value of the parameter an arrow indicates the modify mode RIGHT Enter confirms the choice whilst LEFT Escape discards it The changing of...

Page 20: ...rity GPS 0 5 EXT 0 5 E1 0 5 PTP 0 5 IRIG B 0 5 0 1 2 3 4 5 PPS Mute ON OFF Holdover 0 999999 s PPS Mux Out PPS IRIG B PULSE 1 PULSE 2 Board Settings IRIG B Mux Out PPS IRIG B PULSE 1 PULSE 2 Info SW HW version Disciplining Vtune value 0 65536 PPS Sync ON OFF Stability f f for each source measured in the past 10 minutes Show Statistics Holdover Num Holdover Max Quality Min PPS Dist Max Pos Alarm Nu...

Page 21: ...quality sent only in E1 Master mode PPS Timeslot Rx 2 32 17 excluded PPS Timeslot Tx 2 32 17 excluded BERT Rx ON OFF BERT Tx ON OFF BERT Timeslots Rx ON OFF for 32 timeslots from 1 to 32 BERT Timeslots Tx ON OFF for 32 timeslots from 1 to 32 SSM Column Rx 4 8 E1 SSM Column Tx 4 8 Status Status UNKNOWN SLAVE MASTER TD value ns Enabled ON OFF Board Type Slave Master Jitter 1 255 Unicast ON OFF Dest ...

Page 22: ...he 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 Gateway Allows to set the gateway associated with specific network interface To activate the changes system needs ...

Page 23: ... 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 P...

Page 24: ...se informations are displayed in the Board Info panel of the main page of the WEB interface Disciplining 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 TLC inactive 1 TLC active TLS Shows the status of the 7 TLS 0 TLS inactive ...

Page 25: ...ight 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 Show Global Info Shows some ...

Page 26: ...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 appara...

Page 27: ... 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 E1 of the Main Panel while is possible change the settings on the E1 Config Panel ...

Page 28: ...t across two panels The in depth configuration is carried on in the Advanced panel whilst the basic settings can be directly changed from the Sources Panel Enable Allows to switch on or off the PTP Type Allows to choose to configure the device as a Grandmaster or a Slave ...

Page 29: ...LECOM POWER Sync 1 s 32 s 1 s Announce 2s 8 s 1 s Announce timeout 12s 0 25s 6s Delay Request 8s 32 s Peer Delay Request 1 s Delay Mechanism E2E E2E P2P Domain Number 0 4 0 Encapsulation UDP UDP Layer2 Routing MULTICAST UNICAST MULTICAST IRIG B The only two settings related to the IRIG B block are the input selector IRIG B Mux and the Timezone NTP Mute Do not reply to any NTP request before synchr...

Page 30: ... 3 exchanges in less than 5 minutes Event Code 008 GPS PPS Status change of PPS from satellite Event Code 009 GPS Antenna GPS antenna connection or disconnection Event Code 010 Bad Vtune Vtune incorrect value Event Code 011 PPS Syncr Sychronization completed Event Code 012 E1 Signal Change in the status of the presence of the E1 signal Event Code 013 E1 Frame Change in the status of the presence o...

Page 31: ... User Account The main user who has access to the apparatus is the administrator He is able to change its credentials under Account Settings 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 T...

Page 32: ...on Rate MM SS Pulse Length SS ssss The system generates a sequence of pulses of Pulse Length length and repeating every Repetition Rate starting at Start Time and stopping at Stop Time Please note that the Start Time 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...

Page 33: ...te to EXT Frequency Ref and check that the frequency source is valid Eventually modify the accepted frequency under EXT Settings o Navigate to EXT Time Ref and check that the time source is valid o Navigate to E1 Status and check that the E1 signal and E1 framing are both valid o If the PTP protocol is needed check if it is enabled under PTP Enabled o Check the status of the PTP signal by navigati...

Page 34: ... and Status should display Slave Presence of the IRIG B signal In the IRIG 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 Switchover policies It is possible to set different policies for the switch These policies can be set from the front panel Boa...

Page 35: ...should be positioned on a tower or on a roof with a good view of the GPS satellite constellation 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 fr...

Page 36: ...nce 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 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 GP...

Page 37: ...e session because some values may be spurious in the first phase of synchronization or acquisition of satellites by the GPS radio 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 move...

Page 38: ...device the log of the last 6 hours http x x x x cgi bin savestability 2 by letting an external event logger collect the data e g AON Console Manager 3 by using a debug utility to retrieve the live values distance jitter validity and by post processing them ftp digiguest guestd www digital instruments it Server 20TCP 20v2 zip To do so is simply necessary to launch the utility and specify the correc...

Page 39: ...l use pwm_speed_limit internal use Sync done locked Master currently selected source Is suggested to 1 Collect the data as previously explained in csv format using Continuous save option 2 open Excel and apply an automatic filter on the 2nd column the one of the source number with the 3 initially filter based on source 1 GPS and verify that the 5th column PPS distance would contain values near 100...

Page 40: ...MXS EVO MANUAL MXS EVO Manual Rev 1 7 40 The schematic is depicted here ...

Page 41: ...Release 1 7 october 2012 Added clock generation support Release 1 8 october 2012 Added handling of the ESMC packets for the SyncE Release 1 9 november 2012 Added timing information over E1 Release 2 0 january 2013 Added PTP custom parameters Added disciplining parameters in the PTP Announce Message Added support for PTPv2 unicast through signalling messages Release 2 1 january 2013 Added support f...

Page 42: ...L MXS EVO Manual Rev 1 7 42 Release 2 7 september 2013 Added multiple VLAN support Release 2 8 october 2013 Added support for NTP hardware timestamping Release 2 9 october 2013 Added support for PPS over serial line ...

Page 43: ... 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 ...

Page 44: ...connector BNC GPS Section Receiver 12 Channels L1 1575 42 MHz Tracking Correlation on 12 satellites PPS accuracy 50 ns on SA Antenna connector TNC Collection time 4 min External Section Frequency Reference Standard frequencies 1MHz 2MHz 2 048MHz 5 MHZ 10 MHz Input level From 2 dBm to 16 dBm sine wave Time Reference Standard periods 1 PPS Input level TTL 5 Vpp square wave Input impedance 50 Ω Input...

Page 45: ...es TCP IP protocol Signaling N 7 led on front panel Serial Connection RS 232 connector DB9 Male 15 kV ESD Remote signalling 7 Dry contact on Weidmuller connector with 3 5 mm step Remote controllers 4 Dry contact on Weidmuller connector with 3 5 mm step Supply Input N 2 independent supply Network 95 Vac 240 Vac Plug IEC320 integrated filter EMI RFI Sizes Width 1 Unit 19 Depth 300 mm without connect...

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