Specifications

1X UBS Macro B T S Optimization/A TP UBS R edundancy/Alarm T esting
DO NOT perform Procedure E -3 , unless the site is configured with an QHSO or
MSO time base as a backup for the GPS .
Procedure E -3 GPS and QHSO/MSO R edundancy/Alarm T ests
1
Before enabling an y XMI, alw a ys v erif y that the TX output is terminated into a 200
W non-r adiating RF load! F ailure to do so could result in serious personal injury
and/or damage to the equipment.
If the XMI is not INS (green), enable it by selecting it and then selecting Device > Unlock .
2
Click OK to close the status report window .
3
K ey the XMI by selecting it and then selecting Device > X CVR > K ey .
4
Disconnect the cable from the S SI RGPS connector . This forces the QHSO board time base to
become the CDMA timing source.
5
Observe that a CDMA timing reference alarm and source change are reported in the Alarm
Monitor .
6
Allow the QHSO/MSO to become the active timing source, and verify the following:
• The XMI remains keyed and INS .
• No other modules went OOS due to the transfer to QHSO/MSO reference.
7
Reconnect the cable to the S SI RGPS connector .
8
Allow the GPS to become the active timing source, and verify the following:
• The XMI remains keyed and INS .
• No other modules went OOS due to the transfer to GPS reference.
9
De-key the UBS by selecting Device > X CVR > Dekey .
10
Disable the XMI by selecting it and then selecting Device > Lock .
Result: The XMI color changes to yellow (OOS).
68P09283A63 -5 E -11
A UG 2007 FOA