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Trigger Propagation Delays

Estimating the trigger propagation delays

The propagation delay of the Trigger signals from the master device to a slave device can be roughly estimated by adding the typical delays encountered in each segment of the signal path.

Typical Delay values per C2C-Link segment

Delay Element Min. Typ. Max. Units

(1) IntraPC interconnection (Whole IntraPC C2C-Link interconnect including FPGA I/O and IntraPC cable)

0 5 10 ns

(2) 1636 InterPC C2C-Link Adapter – IntraPC-to-InterPC delay

  15   ns
(3) 1636 InterPC C2C-Link Adapter – InterPC-to-IntraPC delay   20   ns
(4) 1636 InterPC C2C-Link Adapter – InterPC-to-InterPC delay   0   ns
(5) InterPC LAN cable   5   ns/m

Example 1 – IntraPC Configuration

For an IntraPC only configuration there is only one delay element to consider: (1)

Parameter Min. Typ. Max. Units

(1) IntraPC interconnection

0 5 10 ns
Total Trigger Delay 0 5 10 ns

Example 2 – 3-adapter InterPC Configuration; 20 m+20 m LAN cable

This configuration is composed of 3 Intra-PC segments. For devices belonging to the same IntraPC segment as the Master device, there is only one element to consider.

Parameter Min. Typ. Max. Units

(1) IntraPC interconnection

0 5 10 ns
Total Trigger Delay for devices of the Master InterPC segment 0 5 10 ns

For devices belonging to the same IntraPC segment as the Slave1 adapter, there are 5 delay elements to consider:

Parameter Min. Typ. Max. Units

(1) Master IntraPC interconnection

0 5 10 ns

(2) Master 1636 InterPC C2C-Link Adapter – IntraPC-to-InterPC delay

  15   ns
(5) Master to slave1 InterPC LAN cable – 20 m   100   ns
(3) Slave1 1636 InterPC C2C-Link Adapter – InterPC-to-IntraPC delay   20   ns

(1) Slave1 IntraPC interconnection

0 5 10 ns
Total Trigger Delay for devices of the Slave1 InterPC segment   145   ns

For devices belonging to the same IntraPC segment as the Slave2 adapter, there are 7 delay elements to consider:

Parameter Min. Typ. Max. Units

(1) Master IntraPC interconnection

0 5 10 ns

(2) Master 1636 InterPC C2C-Link Adapter – IntraPC-to-InterPC delay

  15   ns
(5) Master to slave1 InterPC LAN cable – 20 m   100   ns
(4) Slave1 1636 InterPC C2C-Link Adapter – InterPC-to-InterPC delay   0   ns
(5) Slave1 to slave2 InterPC LAN cable – 20 m   100   ns
(3) Slave2 1636 InterPC C2C-Link Adapter – InterPC-to-IntraPC delay   20   ns

(1) Slave2 IntraPC interconnection

0 5 10 ns
Total Trigger Delay for devices of the Slave2 InterPC segment   245   ns