Instruction manual

ManualsBrandsDigital Instruments ManualsPortable GeneratorMXS-EVO

MXS-EVO - MANUAL

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MXS-EVO – Manual – Rev 1.7 - 12 -

Error Rate Test (in reception and / or transmission), and choosing 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

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: 0X1X2X3X4X5X60 where:

• X1 passes from 0 to 1 occurs when the reception of an error;

• X2 passes from 0 to 1 when an overflow occurs in the counter total BERT;

• X3 goes from 0 to 1 when an overflow occurs on the BERT error counter;

• X4 changes from 0 to 1 when received 32 '1 'row;

• X5 goes from 0 to 1 when received 32 '0 'row;

• X6 from 0 to 1 when there is loss of synchronization;

MXS-EVO 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 many servers widely available, making it a very smart choice for time synchronization.

The device supports NTP server version 4 that distributes the synchronous time related to an external time reference

(typically GPS, PTP or IRIG-B).

To achieve better performance hardware timestamping is supported, but in this case PTP support is disabled.

When using hw timestamping the precision of the hardware timestamps in the NTP packet is better than 100 ns.

In order to use this feature the client has to support the interleaved mode

, enabled with the following statement:

peer <server ip> true iburst xleave prefer

In order to use the broadcast mode authentication has to be disabled in the client configuration with the following

statements:

disable auth

broadcastclient

http://www.eecis.udel.edu/~mills/ntp/html/xleave.html