Foxcom SATLIGHT 7225H, Installation And User Manual

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Setting up the Transmitter
page 8 Document no. 93-005-33-B2
2.1 Setting up the Transmitter
1. Place the 7225HT in the 7180M Chassis.
2. Apply AC power to the chassis. The Power Supply and Laser
LEDs should be lit.
3. Using an optical power meter, measure the optical power. Insert
the meter’s cable into the Transmitter’s optical connector. Power
levels should be between 2 - 5 mW (+3 to +7 dBm).
Alternatively, use a DVM to measure the voltage at:
• pins J13-P17 through J13-P24 for the slot being measured
(See
Table 4 7225HT Transmitter Pinout
on page 20 for details
regarding J13 pinouts) (7180M Rackmount)
• at pin #6 of the 9 pin connector (standalone)
The signal level should be -4.2 to -4.8VDC.
4. On the rear panel, connect the coax cable to the RF Input
Connector. The RF LED should be lit.
5. On the rear panel, connect the fiber optic cable to the Optical
Connector.
6. Adjust the Gain Control Potentiometer to give the desired output
power. Using a small screw driver, turn the potentiometer
(located on the front panel) to increase or decrease the gain.
• To
increase
the gain, turn the gain control clockwise.
• To
decreas
e the gain, turn the gain control counterclockwise.
For more information, see
2.7 Aligning the Fiber Optic Link
on page15 .
Note
If either LED is not lit, see
Chapter 5: Troubleshooting
, on page 29.
Caution
When monitoring the voltage outputs use only a high
resistance DVM.