7320 IFL Installation and User’s Guide
Set Up
Foxcom Proprietary Information
15
Document No. 93-005-28-C
3.1.3. Setting Up the Receiver
1.
Place the 7320 Receiver in the 7000M Chassis. The operating base plate
temperature must be between -10
°
C to 55
°
C.
2.
Apply AC power to the chassis. The Power Supply’s LED should be lit.
3.
Mount the 7320R into the chassis.
4.
On the rear panel connect the fiberoptic cable to the Optical Connector. The
Opt. LED should be lit.
5.
Using an optical power meter, measure the optical power coming to the
Receiver from the fiberoptic cable. The power levels of the Receiver should
be the power level measured at the Transmitter minus the fiber loss
3
.
Alternatively, use a DVM to measure the voltage at pin #6 of the
D type connector. The power level should be 1V to each 1 mW measured at
the Receiver input.
6.
On the rear panel, connect the fiberoptic cable to the Optical Connector.
The Opt. LED should be lit.
7.
On the rear panel, connect the coax cable to the RF Output Connector.
Note
If either LED is not lit, refer to Trouble Shooting on page 24.
3.1.4. Measuring the RF Signal Strength
The Receiver’s 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:
1.
Using a Digital Volt Meter, measure the voltage at the connector pin #4
(both Rackmount or Standalone).
2.
Refer to Manual Gain Control on page 23 for further details regarding
voltage levels.
3
Fiber loss is defined as:
(0.4 dB/km x length (km) of the fiberoptic cable) + (0.5 dB x number of connectors).
For example if a link was 10 kilometers long and had two connectors the loss would be:
(0.4 dB/km x 10 km) + (0.5 dB x 2) = 5.0 dB.
