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Optical Transmitter

The Salient Features of Optical Transmitter

Product Summary
Optical transmitter adopt an internal isolated Distributed Feedback (DFB) laser as optic source, transmitter picture and voice to fiber system by AM-VSB, switchover to electric signal by optical receiver, then distribute to general customers. This kind of the equipment is widely used in broadband integrated information networks, transmit TV, digital & voice signal. It is the key transmitting equipment for wide net.
Features
1. Adopt imported High-quality DFB laser (Ortol, Lucent, Fujitsu, Mitsubishi).
2. 1U, 19" rack housing
3. 45~750/870 MHz forward bandwidth
4. 4~22mW optical output power
5. Automatic / Manual gain control mode
6. Front panel LCD display
7. RS485/RS232 control interface.
8. FUJITSU optic module, 860MHZ PHILIPS amplify module.
Diagram
Optical Parameters
Items
Unit
 
Laser Type   Cooled DFB LD with isolator
Optical Power
mW
4
6
8
10
13
16
20
Optical Link Path Loss
dB
6
8
9
10
11
12
13
Optical Wave Length
nm
1310±20
Optical Connector Type  
FC/APC SC/APC
RF Parameters
Operating Frequency
MHz
45 to 750 or 45 to 870
RF Input Level
dB mV
75 - 85
Flatness In Band
dB
+0.75
Input Impedance
W
75
Input Reflection Loss
dB
³- 16
Gain control range
dB
10dB
Channel loading  
77 NTSC or 60 PAL channels+200 or 300 MHz digital channels
Link Performance
Output

Typical Link budget
Power   6dB 7dB 8dB 9dB 10dB 11dB 12dB 13dB 14dB 15dB
4mW (6dBm)  
 
52.5
 
51.5
50.5
 
 
 
 
 
6mW (8dBm)  
52
51
50
 
 
 
 
 
 
 
8mW (9dBm)  
52.5
51.5
50
 
 
 
 
 
 
 
10mW (10dBm)  
 
52.5
51.5
50
 
 
 
 
 
 
13mW (11dBm)  
 
 
 
 
 
 
 
52.5
51.5
50
16mW (12dBm)  
 
 
v
52.5
51.5
50
 
 
 
 
20mW (13dBm)  
 
 
 
 
52.5
51.5
50
 
 
 
C/CTB
dB
³- 65
C/CSO
dB
³- 60
C/N
dB
³ 51

Test conditions:
1.Room temperature: 25 C 5 C
2.77/60 CW carriers (NTSC/PAL frequency planning), 4/5MHz noise bandwidth

Electrical/Physical/Environmental Performance
Control interface  
RS485, RS232
Power Voltage
V
220(110~254)
Power Consumption
W
24
Operating Temperature
°C
0°to 50°C
Storage Temperature
°C
-20° to + 70°C
Dimensions
mm
385D×483W×44H

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