FS71C-85 Series User Manual | 16
Copyright © 2015 Fiber-Span
5
Setup Procedure
Overview
Before the unit can be connected to the DAS and
powered on, the following cautionary notes must be
observed.
Strict adherence to these guidelines will ensure compliance with FCC mandated operational restrictions.
Cautionary Notes
WARNING: Before powering the unit on, it is imperative
to measure the downlink composite power level at the
Antenna port. When connecting directly to an antenna,
the maximum downlink antenna gain must not exceed
4.85 dBd and the cable loss from DAS port to antenna
must not be less than 5 dB. The maximum uplink antenna gain must not exceed -2.15 dBd.
WARNING: All RF ports must be properly terminated
prior to applying power to these units. Unused RF ports
should be terminated with 50 ohms. Failure to properly
terminate an RF port may result in damage to the unit.
All output ports must be terminated with a 50Ω load
capable of handling 20W of power before the HRU is
powered on. Alternatively, the HRU can be connected to
the in-building system assuming the connections are
50Ω with acceptable VSWR (<2.0:1). This will prevent
damage to the unit.
Electrostatic Discharge ESD Use caution when touch-
ing equipment. Make sure your body has been statically
discharged by grounding yourself via an ESD grounding
strap. This will prevent damage to sensitive components inside the unit.
WARNING: For DHRUs equipped with fans, make sure
that the fans are not blocked, thereby allowing heat energy to escape the enclosure. An DHRU with a blocked
fan will exhibit a much lower MTBF.
Contents of Package
With the purchase of any DHRU the following are
included when shipped:
• DHRU Product
• DHRU User Manual
• Test Data Sheet showing factory set levels
• Outline Drawing
• Mating Circular Alarm Connector
Additionally, the following items are recommended for
Setup and operation:
• Laptop PC
• 6 ft. cable, USB-A to USB-B
DHRU GUI Software
The DHRU software sets all key operational parameters.
See Fig 12 for the Alarm / Control Screen:
Alarm / Control Settings
• Supply Voltage Alarm
• Power Amplifi er 1 (Uplink) Current Alarm
• Power Amplifi er 2 (Downlink) Current Alarm
• Power Amplifi er 1 (Uplink) Output Set (Mute)
• Power Amplifi er 2 (Uplink) Output Set (Mute)
Diagnostics
• RF Power Amplifi er 1 (UL) Current value (mA)
• RF PA1 FWD and REV power detector (dBm)
• RF Power Amplifi er 2 (DL) Current value (mA)
• RF PA2 FWD and REV power detector (dBm)