Multi Device Sync Tab

The Multi Device Sync (MDS) tab gives access to the automatic timing synchronization of measurement data from multiple HF2 instruments. This functionality and tab is available on all HF2 instruments.

Features

  • Automatic timing synchronization across instruments

  • Periodic check of synchronization

  • Selectable instrument subgroup

  • Status display

Description

The Multi Device Sync tab contains the controls and status information for synchronized measurements on multiple instruments. Whenever the tab is closed or an additional one of the same type is needed, clicking the following icon will open a new instance of the tab.

Table 1. App icon and short description
Control/Tool Option/Range Description

MDS

btn mnu sync um

Synchronize multiple instruments.

The Multi Device Sync tab shown in Figure 1 consists of the Available Devices section, a Status section, and a wiring diagram.

functional mds
Figure 1. LabOne UI: Multi Device Sync tab

The Multi Device Synchronization feature provides an automated functionality to remove the clock offset of separate HF2 instruments. This enables a correct simultaneous display of their data in the Plotter Tab and helps when analyzing recorded data. In multi-channel applications that require sub-microsecond timing precision, the user can therefore benefit from having synchronized data from the start, rather than having to manually measure and compensate the clock offset in post-processing.

The first prerequisite for automatic synchronization is that all instruments are connected to the same LabOne Data Server (see Connecting to the Instrument).

These connections are automatically established with all HF2 instruments physically connected to the same host computer. Once all instruments are connected, they are selectable in the Tree Selector of a newly opened Plotter tab allowing you to visualize their data simultaneously, though by default these data are not synchronized yet. The settings of multiple instruments can be accessed in parallel by opening a new Web Server session for each of them. This is done by opening a new browser tab and connecting to localhost:8006 or 127.0.0.1:8006, respectively, and then double-clicking the respective instrument entry in the Available Devices list. With multiple instruments connected to the same Data Server, tabs that are available for several instruments will feature a device selector as shown in Figure 2.

functional mds device selector
Figure 2. Example of the device selector for the Device tab

The second prerequisite for automatic synchronization is correct cabling of the instruments explained in the diagram in Figure 3. The instruments need to be arranged in the form of a "daisy-chain" where the ZSync Out connector of the first instrument is connected to the ZSync In connector of the second instrument, and so forth.

functional mds cabling
Figure 3. Cabling for automatic synchronization of multiple HF2 instruments

Once the cabling and the connectivity is set up correctly, automatic synchronization is started in the Multi Device Sync tab by checking the Enable button on the instruments in the Available Devices list, and then clicking on btn uielements startstopsync um. The sequence assignment of the instruments (Leader, Follower 1, Follower 2,…) can be defined by the order in which the Enable button is clicked. This assignment has to agree with the way the cabling is made. The sequence is also relevant for addressing the instruments in an AWG sequence program. The Message display on the right will then report on the progress, and the Sync Status LED will turn green if the synchronization was successful. In that case, visualizing a time-dependent measurement of multiple instruments in the Plotter will demonstrate the timing synchronization.

Functional Elements

Table 2. Multi Device Sync tab
Control/Tool Option/Range Description

Start Sync

btn uielements startstopsync um

Start the automatic synchronization of the selected devices.

Sync Status

Indicates the status of the synchronization within this group. Green: synchronization successful. Yellow: synchronization in progress. Red: error (see message).

Message

Displays a status message of the synchronization group.

Cabling

This image shows how to connect the devices for device synchronization.

Phase Synchronization

Reset phases of all oscillators on all synchronized devices.

Identify Device

btn uielements identify um

Make device’s front LED blink