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FEATURES
- Surface Mount
Technology (SMT) for High Reliability and Repeatability
- Compact Modules and
Card Units
- Laser Based
Back-Biased Photo Detection Circuitry for Stable Optical
Output Over Full Temperature Range (Singlemode)
- 10MHz Video Bandwidth
- Meets EIARS-170,
RS-343A
- Frequency Modulated
(FM) Transmission
- Input Voltage Range:
12VDC-35VDC, 9VAC-24VAC (Modules)
- SpectraSmart™
Compatible
- Meets NEMATS1 fTS2
and Caltrans Specifications
- Utilizes Internal
Switching Power Supplies
- Meets RS-250C
Transmission Requirements
- Compatible with All
NTSC, PAL, or SECAM Systems
- LED Status Indicators
Provide Rapid Indication of Critical Operating
Parameters
- Automatically
Resettable Solid-State Current Limiters on All Power
Lines: Provides Equipment Protection
- Wide Optical Dynamic
Range: Optical Attenuators are Never Required
DESCRIPTION
The LM140 is a Frequency
Modulated (FM) state-of-the-art fiber optic video system
that transmits and receives a real time video signal over
one multimode or singlemode fiber. PAL, SECAM or NTSC
formats, in B&W or color, are seamlessly transmitted
distances of up to 6Km (multimode) and 100 Km (singlemode).
All Lascomm products requires no user adjustments & features
superior quality and performance. The capabilities of the
Model 140 are enhanced by it's compatibility with Lascomm's
PC based SpectraSmart™ Network Management and Diagnostic
software system. See the SpectraSmart™ brochure for more
details.
CONFIGURATIONS
The 140 product family is
available in both stand-alone modules and rack mount cards.
The cards can be installed in the card chassis, desk chassis
and 19" racking frames. This system can be configured in
either star (module to rack) ortrunking (rack to rack)
configurations. The LM140 is compatible with the LM190
triple transmitter and receiver cards for high-density
applications.
APPLICATIONS
- Security and
Surveillance
- Military
Communications
- Intelligent
Transportation System (ITS)
TECHNICAL SPECIFICATIONS
Video
Format..................................................
Voltage/Impedance................................
Bandwidth.............................................
Differential
Gain.....................................
Differential
Phase...................................
SNR......................................................
Return
Loss...........................................
Field
Tilt................................................
Carrier Frequency................................... |
NTSC, PAL, SECAM
1 Vp-p, 75 Ohm, 1.5 Vp-p max.
5 Hz to 10 MHz @ -3 dB
<2% typical
<1.5° typical
67 dB weighted*
>30 dB
<0.5% max.
70 MHz |
* As per RS-250C, measured @
1Km (multimode), @ 10Km (singlemode)
Connectors
Video...................................................
Optical.................................................
Power..................................................
|
75 Ohm BNC (Gold
Center Pin)
ST™, FC
2 Pin Terminal Block |
Power**
Transmitter
Card..................................
Transmitter Module..............................
Reciever Card......................................
Reciever Module.................................. |
2 W
80 mA @ 24 VAC
2 W
90 mA @ 24 VAC |
** Due to variations of
drivers and diagnostic options power shown at maximum
measurements
Indicator
Module (Bi-Color
LED):
Green..................................................
Red.....................................................
Off......................................................
Card (LED):
Red.....................................................
|
Video Sync Present
Video Sync Absent
Absence of Power
Power On |
Physical
Dimensions:
Module***...........................................
..........................................................
Card....................................................
..........................................................
Weight:
Module................................................
Card...................................................
Number of Rack Slots............................
|
90 mm (3.5")L, 60 mm (2.3")W
25 mm (1")H
160 mm (6.3")L, 20 mm (0.8")W
100 mm (4")H
858 g (3 oz.)
450 g (16 oz.)
One |
*** Add 30mm to include
mounting flanges
Enviromental
Operating
Temperature..........................
Storage Temperature.............................
Relative Humidity.................................. |
-40°C to +74°C
-55°C to +85°C
0 to 95% Non-condensing |
Quality
MTBF...................................................
.......................................................... |
>290,000 hours @
Ground Fix
35°C per MIL217F |
Optical
Fiber
Type/Size
(um) |
Optical
Output
(dBm) |
Reciever
Sensitivity
(dBm) |
Optical
Budget
(dB) |
Wavelength
(nm) |
Optical
Connector |
Optical
Dynamic
Range (dB) |
| Multimode* (SLED) |
|
|
|
|
|
|
| 62.5/125 |
-13 |
-33 |
20** |
850 |
ST |
39 |
| 62.5/125 |
-16 |
-33 |
17** |
1300 |
ST |
39 |
| Singlemode
(Laser) |
|
|
|
|
|
|
| 9/125 |
-7*** |
-35 |
28 |
1310 |
ST,FC |
41 |
| 9/125 |
-10*** |
-35 |
25 |
1550 |
ST,FC |
41 |
* Distance is limited to
fiber loss, splices and fiber bandwidth
** For 50/125μm fiber, subtract 3dB
*** Higher output lasers available
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