Timing setup

${chooseTimezone}

Select the system time source. Currently it is set to ${currentMode}. Each possible timing mode explains how the two clocks are controlled: the sampling clock is used for time series data, and the Linux system clock is used for log files.

${modeSel}

${modeSetup}

${save}

Direct GPS PTP NTP Manually set CD24/DM24 with GPS DM24 time of day Unable to load the mode setting from {1}. Unrecognised mode {1}. Contact support@guralp.com with this message. Choose timezone for display Saving settings…

Settings saved.

Saving failed: {1}

Error writing to file.
Filename: {1}
Reason: {2} (error {3})

Unable to load NTP configuration from {1}: {2} (error {3}).

{1} function disabled (was previously {2}).

NTP configuration updated.

Timing services have been restarted.

Choose timezone for display

Select the timezone used for displaying dates and times. This does not alter the timestamp for data records; it is only used for display purposes in this interface.

${select}

Set timezone Cancel Done

Unable to scan system timezone directory {1}: {2} (error {3}).

Unable to save timezone setting to file {1}: {2} (error {3}).

Timezone set to {1}. System will need to be rebooted for all programs to pick up the new setting.

Direct GPS configuration Set timing to use direct GPS

Connecting an external GPS receiver will cause the data acquisition clock to use it as a time reference source. The system's NTP (network time protocol) service will also use this reference. Although any serial port may be selected for the NMEA, there is a specific pin to which the 1PPS signal must be connected as discussed in the device manual.

${portSel}

${portConfig}

The CMG-NAM may act as a stratum 1 NTP (network time protocol) server when a suitable external GPS receiver is connected to a serial port. Other equipment may then be synchronised to the CMG-NAM using NTP.

${portSel}

${portConfig}

{1} function set to NMEA input.

PTP configuration Set timing to PTP mode

The ADC clock will be disciplined using an external IEEE1588 Precision Time Protocol (PTP) grandmaster clock. This mode is significantly more accurate than NTP, but requires a grandmaster clock on the local network.

Delay mechanism: ${delayMechanism}

Transport layer: ${transportLayer}

Automatic (recommended) E2E end-to-end for basic network P2P peer-to-peer for IEEE1588-optimised network IPv4 (UDP multicast) IPv6 (UDP multicast) 802.3 (raw Ethernet) NTP configuration Set timing to NTP mode

The ADC clock will be disciplined by an external NTP peer reference. Note that PTP mode is much more accurate, but requires the purchase of a PTP grandmaster clock.

Enter the address of one or more servers in the table below.

${peerTable}

${addPeer}

${toggleOutputPort}

${portSel}

${portConfig}

The CMG-NAM system clock will be disciplined by an external NTP peer reference. This clock is used for log timestamps but not data. The CMG-NAM is also capable of acting as an NTP peer for further systems.

${peerTable}

${addPeer}

${toggleOutputPort}

${portSel}

${portConfig}

The CMG-EAM Linux system clock will be disciplined by an external NTP peer reference. It is not used for directly timestamping the data.

If desired, an NMEA output port can be configured which will allow a CD24/DM24 digitiser to discipline its sample clock against the CMG-EAM's Linux system clock. In systems where the EAM and CD24/DM24 are separate components, this will require a special cable. In systems where the components are integrated, this function is usually available on Port C.

${peerTable}

${addPeer}

${toggleOutputPort}

${portSel}

${portConfig} Peer address Options Delete peer The remote NTP server (peer) address. This may be a hostname, an IPv4 address or an IPv6 address. Options used for this peer. Refer to the NTP documentation for full details. The default of "minpoll 4 maxpoll 4" causes NTP to poll the server every 16 seconds, the highest frequency it supports. This gives the best accuracy. Add peer Delete Enable NMEA output port Disable NMEA output port

{1} function set to NMEA output.

Manual timing mode Set timing to manual control

In manual timing mode, no correction will be made to the sample clock and it will be left to run free. The timing may manually be jam set with the command force-digitiser-timing, but this is not accurate${} for attached CD24/DM24 units${}.

CD24/DM24 timing mode Set timing to follow CD24/DM24 with GPS

This is the normal, recommended timing mode. An external GPS receiver is connected to the GPS port of the digitiser (if separate modules are used, this is the port on the CD24/DM24 digitiser module). The sample clock will be disciplined directly against the GPS reference. The Linux system clock, used for log files and environmental data (but not time series data) will be disciplined against the sample clock.

${enableRTStatus}

Note: this mode is unusual on a CMG-NAM. A GPS receiver is connected to the GPS port of each attached CD24/DM24 unit (which are connected in turn to the CMG-NAM via a serial port). The sample clock will be disciplined directly against the GPS reference and the CMG-NAM's clock, used for logging but not time series data, will be disciplined against the sample clock.

${enableRTStatus}

Note: this mode is unusual on an Affinity. This mode only applies to a Affinity that does not have its own digitiser (ADC) boards but is using a legacy CD24 or DM24 digitiser module. A GPS receiver is connected to the GPS port of each attached CD24/DM24 unit (which are connected in turn to the Affinity via a serial port). The sample clock will be disciplined directly against the GPS reference and the Linux system clock, used for logging but not the time series data, will be disciplined against the sample clock.

${enableRTStatus}

Enable time sync (RTStatus) output on all attached CD24/DM24 digitisers.

Time sync (RTStatus) output enabled on all attached CD24/DM24 digitisers.

Enabling time sync (RTStatus) on attached digitisers failed. Terminal logs may be examined in /var/log/libterminal to understand why.

DM24 with time-of-day translation Set timing translator for DM24

In this mode, the CMG-EAM module acts as a translator between an externally provided time of day string and the CMG-DM24 ADC module. Accurate timing information, provided by a pulse-per-second (PPS) signal, is routed in hardware, but the coarse second data is provided over a serial port and can be translated before being transmitted on to the CMG-DM24. This is required if a change of format or baud rate is needed as the CMG-DM24 only works with a very specific set of NMEA-0183 sentences.

Note: this only works with specific hardware which has been modified to support PPS passthrough. Please contact support@guralp.com if you are not sure that this option is appropriate for your hardware.

Select input (time of day) port: ${inputPort}

${inputConfig}

Select output (NMEA for DM24) port: ${outputPort}

${outputConfig} ${duplicateWarning}

Input and output port cannot be the same.

Timestamp receiver activated on {1}.

NMEA output activated on {1}.