Cisco Laser Link Ancillary Modules 数据表
Laser Link
Modular 1310 nm Optical Transmitters
3
Specifications
Optical
Units
LLT III
Notes
Nominal Optical Output Wavelength
nm
1310
± 10
Optical Interface
SC/APC
SC/UPC
E2000
SC/APC
SC/UPC
E2000
Standard
Optional
Optional
Optional
Electrical
Bandwidth
MHz
45 - 1000
Frequency Response
dB
± 0.6 (45 - 870 MHz)
± 1.0 (45 - 1000 MHz)
Composite Triple Beat
dBc
-70
2,3
Composite Second Order
dBc
-65
2,3
Input Return Loss
dB
17
Port-to-Port Isolation
(Narrowcast to Broadcast Inputs)
(Narrowcast to Broadcast Inputs)
dB
>50 (45 - 870 MHz)
>47 (870 - 1000 MHz)
Broadcast RF Input
Required per channel RF Input Level
Required per channel RF Input Level
NTSC 79 Analog ch
NTSC 110 Analog ch
dBmV
15 (series 3~12)
16 (series 13~15)
13.5 (Series 3~12)
14.5 (series 13~15)
Narrowcast RF Input
Required per channel RF Input Level
Required per channel RF Input Level
QAM carriers @ -6 dBc
Other analog carriers
dB
+16
(above Broadcast Input RF level)
+22
(above Broadcast Input RF level)
4
Power Consumption (maximum)
W DC
19.8
Supply Voltage
V DC
24
Supply Current
mA
825
Front Panel Test Point (dBmV/Channel) (110 NTSC Channel
Input)
Input)
dBmV 10
± 0.5
Environmental
Operating Temperature Range
°F
°C
-4 to 149
-20 to 65
-20 to 65
Humidity Range
%
5 to 95
Mechanical (All Modules)
Depth in.
13.5
cm
34.3
Width in.
1.07
cm
2.7
Height in.
5.25
cm
13.3
Weight lb
2.0
kg
0.9
Module Width
slots
1