IXIA AFD2, Manual, Page: 1 / 10

Ixia Platform Reference Manual Manual, Release 6.30 15-1
15
Chapter 15:
Ixia IRIG-B Auxiliary
Function Device
(AFD2)
The IXIA Auxiliary Function Device 2 (AFD2) provides the means for accurate
worldwide timing using Inter-Range Instrumentation Group (IRIG-B)
technology. The ADF2 decodes the GPS
satellite s and time information and
sends out a pulse to the Optixia chassis. The IXIA /AFD2 is shown in Figure 15-
1 .
Figure 15-1. Ixia AFD2
The IXIA AFD2 with integrated IRIG-B is designed to provide 12.5 MHz GPS
clock with a programmable 80 ns sync pulse to the Optixia chassis.
The Ixia AFD2 IRIG-B receiver is controlled by an Ixia chassis through a USB
port. Chassis timing is provided by connecting the Sync Out of the AFD2 to the
Sync In of the chassis. This configuration then enables the chassis to operate as a
subordinate in a virtual chassis chain, with the Ixia AFD2 as the master.
Figure 15-2 on page 15-2 shows the AFD2 in operation with other chassis in a
local chassis chain. Multiple local chassis chains can be collected through IRIG-
B into a virtual chassis chain.