1. Product Summary
WR8602JDS/WR1002JDS is our new ring network self-healing CATV network optical receiver. The pre-amplifier adopts all-GaAs MMIC, post-amplifier adopts GaAs module. Optimized circuit design coordinate with our 10 years design experience, the device achieve high performance index. Microprocessor control, digital display the parameters that make the engineering debug very convenience. It is the main products to build CATV network.
2. Performance Characteristics
High response PIN photoelectric conversion tube.
Two-channel optical signal receive, mutually backup, arbitrarily set up the auto-switching conditions, also can be set to manual switching.
Optimized circuit design, SMT process production, optimized signal path, make the photoelectric signal transmission more smooth.
Specialized RF attenuation chip, good RF attenuation and equilibrium linear, high accuracy.
GaAs amplifier device, power double output, high gain and low distortion.
Single Chip Microcomputer (SCM) control equipment working, LCD displaythe parameters, convenience and intuitive operation, and stable performance.
Excellent AGC performance, when the input optical power range is -9~+2dBm, the output level keep unchanged, CTB and CSO basically unchanged.
Temperature-controlled cooling fan with low noise and high reliability.
Reserved data communication interface, can connect with the Ethernet transponder, access to network management system.
3. Technique Parameter
3.1 Link testing conditions
The technique parameters of this manual according to the measuring method of GY/T 194-2003 <Specifications and methods of measurement on optical node used in CATV systems>, and tested in the following conditions.
Testing conditions:
Forward optical receive part: with 10km standard optical fiber, passive optical attenuator and standard optical transmitter composed the testing link. Set 59 PAL-D analog TV channel signal at range of 45/87MHz~550MHz under the specified link loss. Transmit digital modulation signal at range of 550MHz~862/1003MHz, the digital modulation signal level (in 8 MHz bandwidth) is 10dB lower than analog signal carrier level. When the input optical power of optical receiver is -2dBm, the RF output level is 108dBμV, with 9dB output tilt, measure the C/CTB, C/CSO and C/N.
Note: When the rated output level is the system full configuration and the receiving optical power is -2dBm, equipment meets the maximum output level of link index. When the system configuration reduce (that is, actual transmission channels reduce), the output level of equipment will be increased.
Friendly Notice: Suggest you setting the RF signal to 6~9dB tilt output in the practical engineering application to improve the nonlinear index (under the node) of the cable system.
3.2 Technique Parameters
Item | Unit | Technical Parameters |
Optical Parameters | ||
Receiving Optical Power | dBm | -9 ~ +2 |
Optical Return Loss | dB | >45 |
Optical Receiving Wavelength | nm | 1100 ~ 1600 |
Optical Connector Type |
| FC/APC, SC/APC or specified by the user |
Fiber Type |
| Single Mode |
Link Performance | ||
C/N | dB | ≥ 51 (-2dBm input) |
C/CTB | dB | ≥ 67 |
C/CSO | dB | ≥ 63 |
RF Parameters | ||
Frequency Range | MHz | 50 ~862/1003 |
Flatness in Band | dB | ±0.75 |
Rated Output Level | dBμV | ≥ 98 (-9dBm~+2dBm) |
Max Output Level | dBμV | ≥ 104 (Output use FP-204) |
Output Return Loss | dB | ≥16 |
Isolation | dB | ≥70 |
Output Impedance | Ω | 75 |
Electronic Control EQ Range | dB | 0~10 |
Electronic Control ATT Range | dB | 0~20 |
General Performance | ||
Supply Voltage | V | A: AC (150~265)V; B: AC (35~90)V; C: DC48V |
Operating Temperature |
| -40~60 |
Storage Temperature |
| -40~65 |
Relative Humidity | % | Max 95% no condensation |
Consumption | VA | ≤ 20 |
Dimension | mm | 483 (L) × 345 (W) × 44 (H) |
Note: The forward RF parameters are tested under the condition of using GaAs 25dB double power module in the last stage. Use other module, the parameters will be slightly different.
4. Block Diagram
