3
3. Block Diagram
Note: Adopts butterfly DFB laser or coaxial DFB laser.
4. Technology Parameters
4.1 Link test conditions
Special instructions:
The performance parameters of this manual according to
the measuring method of GY/T 143-2000 <Specifications and methods of
measurement on AM optical transmitter and receiver used in CATV systems>, and
tested under the specified test conditions.
Test condition:
With standard optical fiber and standard optical receiver
composed the test link. Set 84 PAL-D analog TV channel signal at 750MHz frequency
range under the specified link loss. When the optical input power of optical receiver is
-1dBm, measure the C/CTB, C/CSO and C/N.
4.2 Technique Parameters Table
Item
Unit
Technique parameters
Optical output power
mW
4
6
8
10
12
14
16
18
20
22
24
26
Optical link loss
dB
7
9
10
11
11.8
12.5
13
13.6
14
14.4
14.8
15.1
Optical wavelength
Nm
1310±20
Laser type
DFB laser
Optical modulation
mode
Direct optical intensity modulation
Optical connector
type
FC/APC or SC/APC
Frequency range
MHz
47-750/862/1003
RF input level
dBµV
72-88
Flatness in band
dB
±0.75
RF input impedance
Ω
75
Optical Transmitter
User Manual
L-RF-4mW-TX
www.questtel.com
