IXIA AFD2 Manual Download Page 6

Ixia IRIG-B Auxiliary Function Device (AFD2)

Troubleshooting— IRIG-B Unit ‘Not Ready’

15-6

Ixia Platform Reference Manual Manual, Release 6.30

15

Figure 15-8. IxServer Log - Chassis Configured as Slave to AFD2

The chassis is configured as a subordinate to AFD2.

Troubleshooting— 
IRIG-B Unit ‘Not 
Ready’

If, after completing installation by following the steps above, there is no IRIG-B 
information and the status is ‘Unlocked’ in the Time Sources tab of Chassis 
Properties in IxExplorer (

Figure 15-3

 on page 15-3), then one of the following 

conditions needs to be corrected.

1PPS signal is not connected: check cabling between AFD2 and the IRIG-B 
receiver.

IRIG-B Mode B000 has been selected, but the IRIG-B receiver is sending 
B120 signal (or vice versa): change the selection in the Time Sources tab of 
Chassis Properties in IxExplorer (

Figure 15-3

 on page 15-3), and see if the 

status is corrected (‘Locked’) after a short interval.

Summary of Contents for AFD2

Page 1: ...IA 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 thro...

Page 2: ...y latency measurements by subtraction of the transmit time stamp from the receive time stamp For large or very remote chassis chains the chassis chain properties provide an offset delay This delay is...

Page 3: ...e Source Synchronous IRIG B AFD2 IRIG B Mode B000 B000 is straight TTL serial output from the IRIG B receiver B120 B120 is amplitude modulation AM from the IRIG B receiver IRIG B Status Lock Status Lo...

Page 4: ...n of IRIG B as the timer source the IRIG B status is displayed In Figure 15 3 on page 15 3 the status is locked to the 1PPS signal coming from the IRIG B receiver In the chassis tree view of IxExplore...

Page 5: ...fore Attaching AFD2 Changing Time Source Any time the clock source is switched IxServer must be restarted When the chassis is switched from Synchronous time source to IRIG B or vice versa the followin...

Page 6: ...e there is no IRIG B information and the status is Unlocked in the Time Sources tab of Chassis Properties in IxExplorer Figure 15 3 on page 15 3 then one of the following conditions needs to be correc...

Page 7: ...d by one or more Ixia software users located likewise anywhere in the world Where IRIG B and CDMA sources are used all of the sources must have good quality time values in order for the trigger to be...

Page 8: ...B Tb Time Absolute T Time Error at any site Terr Lab Ta T1 Tb Lba Tb T2 Ta Delta L Lab Lba Delta L Ta T1 Tb Tb T2 Ta Delta L T1 T2 2 Ta Tb Delta L 2 Ta Tb If Ta T Terr and Tb T Terr Then Delta L 2 T...

Page 9: ...nd heartbeat is being generated by the IRIG B hardware Pwr OK Green The AFD2 power has been validated Lock Green Indicates that the internal PLL has locked to the 1PPS signal Testing is invalidated if...

Page 10: ...level shift pulse width coded with BCD CF control functions SBS IRIGB120 1kHz carrier sine wave amplitude modulated with BCD CF control functions SBS Clock 12 5 Mhz GPS System clock Pulse Width 80 ns...

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