Maiwei MW99(OR)-RD - RETURN PATH OPTICAL RECEIVER

Description
MW-99(OR)-RD is a low price, high performance optical receiver specially designed for return-path optical system. With 4 output ports, it can be used at head-end node locations of a fiber optic link to convert the optical signal to RF signal.

Features
• Optical receiving with PIN • 4 RF output port • Frequency range 5-200MHz • AGC circuit and slope circuit option • Output gain continuously adjustable (-10dB) • The optical input power range -15 dBm~ +2 dBm. • High-quality switching mode power supply

SPECIFICATIONS

1.Electric Characteristics

Frequency Range	5-200MHz
Flatness	±0.75dB
Output Level (0dBm input)	108dBuV
Output Level (-5dBm input)	96dBuV
Output Return Loss	>16dB
RF Output Test Point	-20dB below output level
Second Order Distortion	<-60dBc
Triple Order Distortion	<-65dBc
Interior Gain Adjustment	0~ -10dB
AC Line Voltage	85-260Vrms
AC Watt	35 watts max.
DC Voltage	24, 9V, 5V

2.Optical Characteristics

Optical Wavelength	1290~1600nm
Optical Input Return Losses	>45dB
Spectral Sensitivity	0.85A/W (1310nm)
Optical Fiber	Mono (9/125µm)
Optical Input Power	-15dBm~+2dBm
Fiber Connector type	SC/APC
Storage Temperature	-30°C to 80°C
Operating Temperature	-20°C to 40°C

BOARD ILLUSTRATION

   1. Power Indicating Lamp
   2. Optical Power Monitoring (Low-Red; Normal-Green)
   3. RF Test Port (-20dB)
   4. LGC gain control
   5. LGC/NGC Switch ( High-LGC; Low-NGC, LGC is recommended )
   6. Optical Power Test Point (5V/mW)

   1. OR4
   2. OR3
   3. RF4
   4. RF3
   5. OR2
   6. OR1
   7. RF2
   8. RF1
   9. RF mix output
   10. RS-485 interface
   11. Power socket

   1. Power plug (220Vac In)
   2. Power socket (220Vac Out)
   3. RF Input (F-connector female)
   4. Audio Output (RCA Female) ( 4L and 4R for stereo output)
   5. Video Output (RCA Female)

Installation

1. Fiber and coaxial cable protection
   There are fiber and coaxial cable protection design in the rear panel. See figure 4-1; please fix this protection device with screw before use. (the rectanglar hole is to protect the coaxial cable, and the arch hole is to protect the reverse fiber.

2. Connection
   Please connect reverse fiber to OR1~OR4 separately, and then connect the RF output of this receiver to headend system.
   Note(R1-RF1, OR2-RF2, OR3-RF3, OR4-RF4)

Input optical power Vs Value in test point

Input optical power ( mW / dBm )	Value in test point V
1.58/2.0	7.90
1.26/1.0	6.30
1.00/0.0	5.00
0.79/-1.0	3.95
0.63/-2.0	3.15
0.50/-3.0	2.50
0.40/-4.0	2.00
0.32/-5.0	1.60
0.25/-6.0	1.25
0.20/-7.0	1.00
0.16/-8.0	0.80
0.12/-9.0	0.60
0.10/-10.0	0.50
0.08/-11.0	0.40
0.06/-12.0	0.30
0.05/-13.0	0.25
0.04/-14.0	0.20
0.03/-15.0	0.15

3. Output level Test
   Test the output level by following two ways
      1. Test the level of the output port with one field-strength meter.
      2. Get the output level from the test point on front panel. (test level + 20dB)

4. Output level adjust
   Select LGC on front panel, and adjust the level by tuning the variable attenuator (key 4) in front panel.

5. System Matching
   The output level and input level of poststage equipment such as CMTS or FM Modulator/ demodulator.
   If this device shall be connected to CMTS, the output level should be around 50~85DB. While it should be 64~74DB if connected to FM Modulator /demodulator.

* Specification is subject to change without notice