Carrier Sync Alarm Or T1 Mux Framer Alarm - ADTRAN TRACER User Manual

61280.003L1-1B
If problems persist after you have followed the Recommended
Actions, contact ADTRAN Technical Support at (800) 726-8663.
C S
ARRIER
The Carrier Sync alarm will activate when frequency
synchronization has not been achieved between the RF link.
The T1 Mux Framer alarm will activate when synchronization
between the T1 mux on each radio has not been achieved.
P
OSSIBLE
• The RF link is down. .................................................................... 1-10
• The RX power is below the -91 dbm threshold. .................... 1-4,7-10
• The far-end transmitter is off, or is transmitting
low power. ............................................................................... 1-4,7-10
• The RF path is not aligned. ....................................................... 1,3,10
• Water is in the antenna feedhorn or connectors. ........................... 1,4
• Both units are set to the same frequency. ..................................... 5,10
• Both units are not set to the same PN code. ..................................... 6
• The connection between the BBP and the RFC is
faulty. .......................................................................................... 1,7-10
• The connection between the RFC and the antenna is
faulty. .......................................................................................... 1,7-10
• The BBP or RFC is faulty. ................................................................. 10
R
ECOMMENDED
1. Check the RX power using the VT-100 user interface or RSSI voltage
(refer to RSSI voltage chart)
Check the far-end transmitter for operation and proper transmit
2.
power.
Check the RF path using a spectrum analyzer or RSSI voltages for
3.
proper alignment. Have path professionally re-aligned and check
system path engineering.
Check the antenna feedhorn and all outdoor connections for water.
4.
5. Change the frequency of one radio through the VT-100 user interface
or front panel button.
Set both units to the same PN code.
6.
Check all connections between the BBP, the RFC, and the antenna.
7.
8. Check the IF and RF cables for shorts.
9. Check connections inside the mast-mount or rack-mount RFC.
10. Replace the RFC.
4/12/99
I M P O R T A N T
A T1 M
YNC LARM OR
C
AUSE
A :
CTIONS
F A
UX RAMER LARM
P 49
AGE
T
ROUBLESHOOTING
R A
ECOMMENDED CTION
(
SEE LIST BELOW
)