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2.3.1
Measuring the RF Signal Strength
The RF signal strength can be monitored during operation via a DC
RF signal-strength monitor. Maintenance personnel can perform a
simple verification process.
To measure the RF signal strength:
•
Rackmount Connector:
voltage at J13-P1 through J13-P8.
•
2380 Relay Adapter:
at J4-P1 through J4-P8.
•
Standalone:
connector pin #4.
The nominal level is 3 to 4 VDC.
2.4
Powering the IFL
• Transmitter power requirement: 14 or 18 VDC
(excluding LNB Drive option).
• Receiver power requirement: 14 or 18 VDC
• The Standalone Transmitter/Receiver is powered by a Foxcom
supplied external DC power supply.
• The Rackmount Transmitters/Receivers are plugged into the
rackmount chassis. The chassis can accept and power up to eight
units.
At temperatures below -10
Note
heater will require an additional 120 mA. The Transmitter's
total power requirement will then be 390 mA.
Ensure that there is a good airflow around the chassis
Caution
rackmount.
5. At least one power supply, either a 14 VDC or an 18 VDC, depending on
customer specifications, must be installed in the 7180M chassis. Up to
two rackmounted power supplies may be installed on the chassis. The
two power supplies must have the
two 18 VDC.
External Power Supply
power supply is connected via connector J11. If an external power
supply is used this must be specified when ordering the
7225H Interfacility Link and the chassis. The voltage level provided by
the external power supply is customer-defined any may be different
from the internal voltage power supply.
7225H Interfacility Link Installation and User's Guide
Foxcom proprietary information
Using a Digital Volt Meter, measure the
Using a Digital Volt Meter, measure the voltage
Using a Digital Volt Meter, measure the voltage at the
°
C, the Transmitter's internal
same
: An external power supply may be used.The external
Powering the IFL
5
@ 270 mA
5.
@ 360mA.
voltage, either two 14VDC or
page 11
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Troubleshooting
