Instruction manual

MXS-EVO - MANUAL
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MXS-EVO – Manual – Rev 1.7 - 10 -
Main Operation
The main purpose of the MXS-EVO 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 input from four different sources:
1. GPS
2. EXTERNAL REFERENCE
3. E1
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 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 are the timing values recognized:
• 1 PPS
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 alignment 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.
E1
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