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ITS Telecom 1700264, Руководство по эксплуатации

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MITS Janus Time Engine              

Page 17 of 39 

Copyright© Instrumentation Technology Systems 2020 

 

 

 

20200929 

 

The drop down list (IRIG, GPS (if present), PTP/NTP, 1PPS) is 
the same in each selection, however, if IRIG is selected as priority 
1 (as shown), this selection will not be accepted for any other 
priority.   
A priority level may not be skipped.  That is if an input for 
priority 1, 3 and 4 is selected (skipped priority 2), fail order will 
not work.  Loss of IRIG as shown as priority 1 will not result in 
selection of the priority 3 choice as in this example choice 2 
would be blank.   
When a time reference is selected, that status of that source is 
displayed.  Green indicates that it is selected and is a valid source.  Yellow indicates that it can 
be used as a time reference, however it is not being used as the reference and the time master is 
not locked to it.  If the indicator is dark (gray), this input is either not available or has been 
invalidated by the MJTE for some error conditions.   Consequently, this reference will be 
skipped over if a fail over sequence is initiated.   

If 

Save List

 is clicked, the current priority list is saved to MJTE flash memory and will be the 

default priority list at power up until changed.  If 

Clear List

 is selected, this list will be cleared 

from MJTE flash memory and will not be shown on the page. 

3.4.2

 

TCP/IP Frame 

The TCP/IP frame provides the ability to set the Janus TCG to receive addresses from a DHCP 
server (factory default) on the network to which it is attached.  When 

Use DHCP

 is checked it 

will cause the Janus TCG to automatically connect to your network.   
In DHCP mode, the Janus TCG will attempt to receive an 
address from a DHCP server for two (2) minutes.  In the event 
there is no DHCP server on the network or it is not accessible 
to the Janus TCG, is will automatically revert to STATIC IP 
mode.  In this mode, connectivity may be achieved by a host 
on the network able to address it via the current STATIC 
address.     
The current mode status reflects 

STATIC 

or

 

ASSIGNED 

(DHCP).  When assigned, the assigned address data is shown 
in the ADDRESS box and on the front panel of the Janus 
TCG. 
The Factory Default static address is 192.168.150.90 with a Gateway of 192.168.150.100 and a 
Subnet Mask of 255.255.255.0.   These values may be changed at any time within the 

TCP/IP

 

frame by entering them and clicking 

Change

.  The values will not be saved until the 

Change

 

button is clicked.  When clicked, the values become effective immediately and are saved to 
internal FLASH memory which will cause them to survive a power cycle.   
While the static address, gateway and subnet mask may be any valid value, they must be values 
that are available and accessible within the applicable network. 
 

Содержание 1700264

Страница 1: ...September 29 2020 MITS JANUS TIME ENGINE PART NUMBER 1700264 OPERATION MANUAL...

Страница 2: ...I O Interface 10 1 2 PHOTO SONICS INTERFACE PSI O 11 1 2 1 Time code and frequency output ports 11 1 3 IRIG B TIME CODE GENERATOR 12 1 3 1 An IRIG B127 output buffer 12 1 3 2 An IRIG B007 output buffe...

Страница 3: ...20 3 5 3 Time Frame 21 3 5 4 Leap Second Adjust 21 3 6 NETWORK REFERENCE SETTINGS PAGE 22 3 6 1 PTP Frame 22 3 6 2 Timers Frame 22 3 7 PTP MASTER SLAVE MODE BEHAVIOR 23 4 0 ASCII COMMAND SET 24 5 0 P...

Страница 4: ...20 Modified commands per Engineering inputs added return responses to queries 6 25 2020 Production Release 9 25 2020 Updated the PTP Master commands Y x two places as PTP mode and PTP Master settings...

Страница 5: ...control and receive status from the MJTE Similarly it provides the control and status for the embedded webserver functions A block diagram of the aggregate MJTE is shown below 1 1 Janus Time Engine Ma...

Страница 6: ...h the priority list continues in a rotating fashion until a valid reference is found and the MJTE can be synchronized to it Should none be available time will continue to be generated driven by the NC...

Страница 7: ...all other inputs to the system A modulated input signal of 3 Vp p to 10 Vp p having a 2 1 to3 1 encoding modulation is required for proper synchronization The IRIG B00x input has an impedance 1K The i...

Страница 8: ...Master Controller There is no separate PTP Ethernet port Photo Sonics Interface PSI O As the PTP Master Clock or PTP Best Master Clock the JTEMC will synchronize its internal master clock to a refere...

Страница 9: ...fset When locked to GPS option NTP or PTP a time zone off set function is provided to localize the time reported if desired The time zone offset adds or subtracts 12 hours 15 minute corrections to the...

Страница 10: ...ut edge alignment 8 Preferred Time Reference 9 Propagation delay offsets for IRIG and NTP inputs 10 PTP terminal device or master clock setting 11 Static IP Address Port Gateway and subnet Mask 12 Tim...

Страница 11: ...where a set of pins is TTL and the other is differential Both outputs are active Clock A 10 TTL buffered output capable of driving 10 TTL loads Short circuit protected SE output termination 50 Frequen...

Страница 12: ...e polarity of these outputs independently 1 4 Programmable Frequency Generators Two programmable frequency generators are synchronized and phase locked to the time master such that a leading edge of e...

Страница 13: ...aster such that there is a fixed number of counts between one second intervals and the zero rollover aligns with the PTP 1 second rollover This method avoids jam sync jumps in the fractional seconds W...

Страница 14: ...right After login the home page on the right appears If login is required MJTE status time reference IP address and mode will not be revealed until successfully logged in When active the home pages p...

Страница 15: ...er TTL or differential Upper case indicates locked and lower case indicates it is unlocked 5 G or g The reference is the optional internal GPS receiver Upper case indicates locked and lower case indic...

Страница 16: ...activity that occurs equal to or greater than this setting will cause the webserver to automatically log out A new login will be required When restoring to factory defaults the username and password p...

Страница 17: ...leared from MJTE flash memory and will not be shown on the page 3 4 2 TCP IP Frame The TCP IP frame provides the ability to set the Janus TCG to receive addresses from a DHCP server factory default on...

Страница 18: ...to the PTP radio button the IP address of the desired NTP server must be entered in the ADRESS text box of the NTP Server frame A missing or invalid address will disable the ability of the MJTE to cre...

Страница 19: ...ds to the received IRIG B12x time The offset value is not entered until the Change button is clicked This value will also be saved to MJTE flash and will survive a power cycle 3 4 6 1PPS Reference The...

Страница 20: ...alue of 30 3 V p p Neither of these values become effective until the Change button is clicked When clicked these values are also saved to flash so that they will survive a power cycle 3 5 2 Clocks Fr...

Страница 21: ...click the Now button before the next real time second ticks When synchronized to 1PPS the 1 second rollover will be synchronized to the 1PPS tick If the MJTE becomes synchronized to an IRIG B signal t...

Страница 22: ...ed by the GPS receiver 3 6 Network Reference Settings page The network page is used to set the MJTE as either a PTP master clock or a PTP terminal device slave 3 6 1 PTP Frame MASTER SLAVE or SLAVE ON...

Страница 23: ...be the network PTP master clock In this instance the MJTE will cease transmission of Announce and Sync messages and listen for such from the BMCA winner The MJTE will not revert to PTP slave mode whil...

Страница 24: ...1 PPS IN YPMx x 0 1 where 0 TTL 1 DIFFERENTIAL YPM Return 19h PM 32h value CR as ASCII Value 1 or 0 1PPS Invert 1 PPS IN YPIx x 0 1 where 0 is in phase with 1 sec tick 1 inverted phase YPI Queries th...

Страница 25: ...ries current value Return 19h CB 32h value CR Value 1Hz 1000Hz Example 19h CB 101Hz CR Clocks Invert Clock A out YCIx x 0 is in phase with 1 sec tick 1 is inverted phase YCI Queries current value Retu...

Страница 26: ...current value Return 19h ICA 32h valuens CR as ASCII Value is 0 to 2000 Example 19h ICA 32h 2000ns CR IRIG IRIG IN Source YISx x 0 1 where 0 AM 1 DCLS YIS Queries current value Return 19h IS 32h valu...

Страница 27: ...of hour SS ssss seconds fractional seconds Misc JTE versions YVQ Returns the firmware version GPS version and MJTE serial number The string format is 19h VQ 32h S N Main GPS _EXT 32h CORE 32h CR The l...

Страница 28: ...ss sss sss subnet mask values ppppp port address 23 is telnet Factory default 192 168 150 90 192 168 150 100 255 255 255 000 0023 Any valid IP address YNS Queries the current network values Returns ne...

Страница 29: ...alue log 2 nn where nn All negative values are for x S only 6 64 sec x A only 5 1 32 5 32 sec x A only 4 1 16 4 16 sec x Aonly 3 1 8 3 8 sec 2 1 4 2 4 sec 1 1 2 1 2 sec 0 1 sec Up to 10 subscribers ma...

Страница 30: ...g 1PPS as a transfer reference in PTP Master Clock mode set UTC time if an IRIG reference is applied that does not include the year the YYYY value will be that read from the TOD until overridden by co...

Страница 31: ...t to right punctuation characters are jumped over and error checking is done on a character by character basis Invalid entries are not accepted If there is an error in the entered value press the ESC...

Страница 32: ...MITS Janus Time Engine Page 32 of 39 Copyright Instrumentation Technology Systems 2020 20200929...

Страница 33: ...CHARACTERISTICS The MJTE is a two board set preassembled into a PC104 style assembly The mounting hole placement board size and connector locations comply with the specifications of PC104 as shown PS...

Страница 34: ...5 1 1 J3 Differential Inputs PS I O board I O Connector Type Where Mate AM IRIG in IRIG DCLS in CLOCK in BNC 3 JTE Master Controller GPS optional SMA PTP NTP RJ45 1PPS out SI IRIG DCLS out SI IRIG AM...

Страница 35: ...entation Technology Systems 2020 20200929 5 1 2 J4 Differential Outputs PS I O board 5 1 3 J9 Power Connector PS I O board DIFFERENTIAL OUPUTS J4 1 1PPS_OUT 2 n 1PPS_OUT 3 GROUND 4 GROUND 5 DCLS_OUT 6...

Страница 36: ...s to default use static IP address Press at power up to actuate S3 Use DHCP IP value Press at power up to actuate S4 Enter System Test mode as start Press at power up to actuate S5 press hold at any t...

Страница 37: ...iseconds Depends on the physical location of the server LAN or WAN and how many nodes exist between it and the MJTE Locked to PTP Factory default 125 50 nanoseconds This specification presumes that al...

Страница 38: ...synchronize to the rising or falling edge of the time markers 1PPS Input This input shall be a TLL pulse per second stream where the pulse width shall be not less than 10 sec and no more than 500 sec...

Страница 39: ...Drives up to 10 TTL loads up to 100 meters over 50 coax The output is independently configurable to deliver pulses with the rising or falling edge coincident with the time master one second rollover...

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