Model 2809
CATV
Linx
®
LDS CATV Receiver
Revision 1.0
11
3.1
Theory of Operation
The 2809 is a sophisticated, state-of-the-art CATV receiver. It provides an impres-
sive set of capabilities in an extremely small package. Key features include:
• Low power operation
• Very cost effective
• Very wide optical input range
• Exceptional CNR performance over the full optical input range
• High output RF level
Figure 3.1 shows a block diagram of the 2809R.
Figure 3.1 Model 2809 Block Diagram
3.2
Power-up and Operation
1) Install the links as described in Section 2, page 7.
2) Measure the RF level BEFORE making any connections to the transmitter. This
measurement is described in Section 3.3, page 12.
3) Clean the optical connectors. See Section 3.5, page 13 for cleaning instruc-
tions. Be sure all optical connectors are APC type.
4) Connect the optical fiber to the transmitter and the receiver. Be sure that the
fiber has continuity and less than the maximum allowable optical loss. Also be
Preamplifier
Photodiode
A1
A2
Power Amplifier
RF Output
Status & Alarm
Circuitry
Status LEDs
Section 3 Operating
Instructions
