Ortel’s Model 755MM-U is a 1550 nm transmitter suitable for link
lengths of up to 10 km with 79 channel analog loading. The 755MM-U
may also be used up to 20 km with a lower channel load of 11 analog
channels and 40 QAM channels. The 75Ω
RF video input supports
frequencies up to 870 MHz. A 50Ω (75
Ω
available ) RF input supports
frequencies from 950 to 2600 MHz for FTTP, L-Band satellite, and
wireless applications.
Applications
Video signal distribution to
HFC CATV and FTTP nodes
Video overlay in passive
optical networks (PON)
Combines CATV + L Band
inputs into a single platform
Also integrated into the RF/Optical design are Ortel’s low chirp control
and noise suppression circuitry. Ortel’s patented pre distortion
technology provides outstanding performance with any of Ortel’s wide
range of cooled broadband lasers. These modules have optional dual
redundant power supplies and SNMP capability.
The performance specifications indicated below are subject to change.
Performance Highlights
Parameter
Operating Temperature Range
Wavelength (Multiple Options)
Optical Power
Frequency Response
CNR (10 km)
CNR (20 km)
CSO (10 km)
CSO (20 km)
CTB (10 km)
CTB (20 km)
SBS (10 km)
SBS (20 km)
RF Input Return Loss
Optical Return Loss
Min
0
1530
10
47
950
52
48
-
-
-
-
-
-
16
40
Typ
25
-
-
-
-
-
-
-
-
-
-
-
-
-
Max
50
1560
-
870
2600
-
-56
-56
-63
-63
17
12
Unit
°C
nm
dBm
MHz
MHz
dB
dBc
dBc
dBc
dBc
dBm
dBm
dB
dB
Features
Optical Spectrum Reshaping
Technology
Optimized RF integration of
predistorter, amplifiers and
laser
Dual redundant power
supplies
Supports SNMP protocol
Complete, efficient laser bias
and TEC control circuitry
OEM/ODM opportunities
available through Ortel
Wideband Transmitter
Digital monitoring and control
ITU Wavelengths
-
-
See following pages for complete specifications and operating/test conditions.
For more information on this and other products:
Contact Sales at Ortel 626-293-3400, or visit www.emcore.com.
755MM-U 1550 nm Transmitter
DATASHEET- OCT, 2006
Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can cause permanent damage to the device. These are
absolute stress ratings only. Functional operation of the device is not implied at these or any other conditions in
excess of those given in the operational sections of the data sheet. Exposure to absolute maximum ratings for
extended periods can adversely affect device reliability.
Parameter
Operating Temperature Range
Storage Case Temperature Range
RF Input Level
Symbol
T
OP
T
stg
-
Min.
0
-20
-
Max.
50
65
3
Unit
°
C
°
C
dBm
RF Characteristics
Parameter
Bandwidth
Frequency Response
RF Input Level
CNR
3
(10 km)
CNR
5
(20 km)
CSO
2
(10 km)
5
CSO (20 km)
CTB
2
(10 km)
5
CTB (20 km)
Input Impedance
75Ω Video Input Return Loss
75Ω Test Port Input Return Loss
50Ω Input Return Loss
4
1.Excludes tilt component.
2.CW carriers, 79 channel NTSC channel plan, 4 MHz noise bandwidth, -5 dBm received power, SMF-28 or equivalent.
3. CW carriers, 79 channel NTSC channel plan, 4 MHz noise bandwidth, 0 dBm received power, SMF-28 or equivalent
4. 75Ω option available
5. 11 channel NTSC channel plan with 40 channel QAM, 4 MHz noise bandwidth, 0 dBm received power, SMF-28 or equivalent
Condition
-
47-870 MHz
950-2600 MHz
79 channels analog
11 channel analog + 40 QAM
-
-
-
-
-
-
47 – 870 MHz RF Input
950-2600 MHz RF Input
47 to 870 MHz
47 to 870 MHz
950 to 2600 MHz
Min
47
-
-
-2.5
-5.8
52
48
-
-
-
-
-
-
16
16
10
Typ
-
-
-
-2
-5.3
-
-
-
-
-
-
75
4
50
-
-
-
Max
2600
1.5
3.5
1
Unit
MHz
dB
p-p
dB
p-p
dBm
dBm
dB
dB
dBc
dBc
dBc
dBc
Ohms
Ohms
dB
dB
dB
-1.5
-4.8
-
-
-56
-56
-63
-63
-
-
-
-
-
Optical Characteristics
Parameter
Optical Output Power
SBS Threshold
Side Mode Suppression Ratio
Optical Return Loss
1
Condition
-
10 km SMF-28
20 km SMF-28
-
APC style connector
Min
-
-
-
30
40
Typ
10
-
-
-
-
Max
-
17
12
-
-
Unit
dBm
dBm
dBm
dB
dB
1. In order to prevent reflection-induced distortion, the laser must be connected to an optical cable having a return loss of at least 55 dB for discrete
reflections and 30 dB for distributed reflections
2 of 5
755MM-U 1550 nm Transmitter
DATASHEET- OCT, 2006
Power Requirements
Parameter
AC Input Range
DC Input Range
Power
Min.
94
50
36
-
Max.
245
60
60
50
Unit
Vac
Hz
Vdc
W
Package Characteristics
Parameter
Height
Width
Depth
Weight
Dimension
1.75 (44), 1U
19 (483)
17.77(452) with fans
9.0 (4)
Unit
in. (mm.)
in. (mm.)
in. (mm.)
lbs. (kg.)
Part Number / Ordering Information
(Note: customization can be made available upon request)
755MM-U
-
-
-
- XX -
Channel Plan
A = NTSC 80-Ch
L Band Option
50 = 50 ohm
75 = 75 ohm
Options
Connectors
ITU Wavelengths
AC Power Cord
NA = N.AMERICA
UK = U.K. & IRE.
EU = EUROPE
EC = EC NEMA
JP = JAPAN
A = Dual PS + SNMP
SC = SC/APC
ee= 21, 1560.61nm
B = Dual PS, No SNMP
FC = FC/APC
:
C = Single PS, No SNMP EC = E2000/APC ee= 59, 1530.33 nm
3 of 5
755MM-U 1550 nm Transmitter
DATASHEET- OCT, 2006
ITU Wavelength Channel Designations
Channel
21
23
25
27
29
31
33
Wavelength
(nm)
1560.61
1558.98
1557.36
1555.75
1554.13
1552.52
1550.92
Channel
35
37
39
41
43
45
47
Wavelength
(nm)
1549.32
1547.72
1546.12
1544.53
1542.94
1541.35
1539.77
Channel
49
51
53
55
57
59
Wavelength
(nm)
1538.19
1536.61
1535.04
1533.47
1531.90
1530.33
4 of 5
755MM-U 1550 nm Transmitter
DATASHEET- OCT, 2006
Laser Safety Information
This product meets the appropriate standard in Title 21 of the Code of Federal Regulations (CFR). FDA/CDRH
Class IIIb laser product. This device has been classified with the FDA/CDRH under accession number 0220800.
Single-mode bulkhead receptacles with internal SC/APC connectors (standard).
Wavelength = 1.5
μm.
Maximum power = 30 mW.
Product is shipped with internal AC/DC and DC/DC power supply converters.
Caution: Use of controls, adjustments and procedures other than those specified herein may result in
hazardous laser radiation exposure.
Information contained herein is deemed to be reliable and accurate as of issue date. EMCORE reserves the right to change the design or specifications of
the product at any time without notice. EMCORE and the EMCORE logo are trademarks of EMCORE Corporation.
1.对于npn： 让黑表笔接假定的集电极c ，红表笔接假定的发射极e 。手指将b、c短接。观测指针摆动情况；之后，调换两表笔重新测量，观测指针摆动情况。 偏转较大假定是正确的！黑表笔接的是c极红表笔接的是e极。 2.对于pnp型三极管 注意：对于pnp型三极管我们是将红表笔接c极 用的 hfe挡检测β值 l 若有adj挡，先置于adj挡进行调零。 l 拨到hfe挡。 l 将被测晶体管...[详细]
stm32/stm8
