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When Huawei OSN3500 SSN1BPA optical signals are transmitted over long distances, there is more signal attenuation, and in order for the optical receiver to receive normal optical signals, it is necessary to add an optical power amplifier board (BA) and a preamplifier board (PA). Increase the transmission optical power of the circuit board to +13dBm ~ +15dBm or +15dBm ~ +17dBm, so that the transmission distance can be up to 120km or 130km or more (G.652 optical fiber, the loss of 0.275dB/km). Provide PA module to complete the preamplification of the received optical signal, which can make the small signal power gain 22dB～25dB (N1BPA), 22dB～33dB (N2BPA).
Huawei OSN3500 SSN1BPASingle Board Characterization Code
The single board characteristic code is the code located after the single board name in the single board bar code.The single board characteristic code of the BPA is used to describe the output optical power of the optical interface.
The relationship between the single-board characteristic code of the BPA and the output optical power is shown in Table 1.
| Single-board | Characterization Code | Description |
|---|---|---|
| ssn1bpa01, ssn2bpa01 | SSN1BPA01, SSN2BPA01 |
BA module output optical power: 14dBm |
| SSN2BPA02 | 02 |
BA module output optical power: 14dBm |
| SSN1BPA02 | 02 |
BA module output optical power: 17dBm |
| SSN1BPA03 | 03 |
BA module output optical power: 17dBm |
Huawei OSN3500 SSN1BPASpecifications
The BPA single-board metrics contain optical interface metrics, laser safety level, mechanical metrics, and power consumption.
Huawei OSN3500 SSN1BPAoptical interface metrics
The optical interface metrics of the BPA single board are shown in Table 1.
| Item | Indicator value |
|---|---|
| Input wavelength range (nm) |
BA: 1530～1565 PA: 1550.12 |
| Input optical power range (dBm) |
BA: -6～+3 PA: -44～-10 |
| Output optical power range (dBm) |
N1BPA: +14 to +14.5 or +17 to +17.5 (BA) N1BPA: -22 to +15 (PA) N2BPA: +14 to +14.5 (BA) N2BPA: -22 to +23 (PA) |
| Noise index (dB) |
BA: <6.5 PA: <6 |
| Minimum Signal Gain (dB) | 22 |
When the BPA preamplifier does loopback, pay attention to the range of input optical power to avoid damaging the optical module.
Laser Safety Level
The single-board laser safety level is CLASS 1M, and the maximum output optical power of the single-board optical port is between 10dBm (10mW) and 22.15dBm (164mW).
Mechanical Specifications
The mechanical specifications of the BPA veneer are as follows:
- Veneer size: 25.4mm (W) x 235.2mm (D) x 261.4mm (H)
- N1BPA weight: 1.0kg
- N2BPA weight: 1.2kg
Power consumption
N1BPA veneer has a maximum power consumption of 20W at room temperature (25°C).
N2BPA single board has a maximum power consumption of 11W at room temperature (25°C).
The technical information in this chapter and the related SDH equipment troubleshooting procedures are provided by Shenzhen Optical Transmission Network Technology Company Limited (www.opticaltrans.com), and are reproduced with permission. Huawei SDH optical transmission equipment, SDH transmission equipment sales phone: 13430988088 Welcome to telephone consultation!
