Installation Instructions
TX & RX Acceptance Tests – continued
PRELIMINARY
SCt300 BTS Hardware Installation, ATP and FRU Procedures
DEC 2000
7-54
Table 7-30: TX Test Using Backup Synchronization
Step Action
5 At the MMI prompt, enter dpll_info and verify that GPS and HSO are good reference sources.
Observe the following typical response:
current dpll task state info:
dpll task state: DPLL_LOCKED
global cdma time: enabled
local cdma time: disabled
Reference Ref_Status Ref_select Even_select(DPLL’s Ref source)
GPS TRUE TRUE TRUE
HSO TRUE FALSE FALSE
FREERUN FALSE FALSE FALSE
2SEC FALSE FALSE FALSE
The Ref_Status for the GPS and HSO must be TRUE. The Ref_select must be TRUE and
FALSE for the GPS and HSO, respectively.
6 Verify that the HSO takes over for the GPS by simulating a failure of the GPS through software.
Simulate the GPS losing all tracked satellites by entering the gps_rx_debug nosats on
command at the MMI prompt. Observe the following typical response:
FM: #2716 Ticks=00140aab pc=08137df4 nid=30003004 org=6
info=09e200270000 file=gps_misc.c line=3904
send gps no sats SET –seeing no tracked sats.
7 At the MMI prompt, enter dpll_info and verify that the BTS is now using the HSO as the
primary reference source. The Ref_select must be FALSE and TRUE for the GPS and HSO,
respectively.
8 Enter the dpll_status command to display the current state of the DPLL. Observe the following
typical response.
Current source set to: HSO reference
DPLL control task state: DPLL track
DPLL status (not valid if using even sec src):
c:6CD6 off: –9697314,25154,8669797 TK
Mode cntr: 60
ip: 3, iq: –9
aip1: 9, aiq1: 4
aip2: 6, aiq2: –2
tip: 3, tiq: –9
integrator: –2511864
9 Verify that the DPLL is “tracking” the HSO. The Current source set to field should
read HSO reference. The DPLL control task state field should read DPLL
track.
10 Exit the MMI communication session and login to the BTS with the LMF.
11 Under the JCdma menu, perform the JCdma Carrier and Jcdma PtOff tests to verify that the
BTS passes using the HSO as the backup synchronization source.
12 Logout of the BTS.
. . . continued on next page
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