User Manual

103
MN024-08
Dry contact alarms:
TFLF is also provided with dry contacts outputs (connectable through .062”
MOLEX plugs) to report alarm condition to third party equipment (i.e. BTS or
repeater).
The dry contact status is reported in the table rightwards.
Note: in case of power supply failure the system is not powered and the dry
contacts will be automatically driven to a “closed” condition.
UL Attenuation Adjustment:
The TFLF is designed to be compatible with most pico/micro BTSs. It is also
provided with an internal adjustable attenuator for the UL path allowing 20dB
attenuation range, 5dB step. Suggested settings are reported in the table 4.3.
To adjust the value a flat screwdriver can be used as per the
picture 4.2.
TFLF power supply
Each TFLF Fast Master Unit requires -48Vdc power supply.
Alarm Condition Contact Position
None Open
Minor Open
Major Closed
TFLF
Composite Input Power External Attenuator UL Adjustable Attenuator Setting
+37dBm 20dB (5W average)
0dB (Position nr. 0)
+33dBm 20dB (2W average) 0dB (Position nr. 0)
+24dBm 10dB 10dB (Position nr. 2)
+20dBm 5dB 15dB (Position nr. 3)
+14dBm 0dB 20dB (Position nr. 4)
+13dBm 0dB 20dB (Position nr. 4)
Tab. 4.2: TFLF dry-contact meaning
Fig. 4.3: Uplink Attenuator
Tab. 4.3: TFLF UL attenuation suggested values