8-Channel Multimode Optically Controlled Optical Attenuator High
Efficiency
Product Application:
Active optical module/Optical Device Test:
In the multi-channel error measurement of optical transceiver
module, parallel data measurement is realized.
In the sensitivity measurement of optical receiving module, it
provides parallel, fast and accurate optical power input;
200ms optical power control stability time, greatly improve the
test efficiency.
Optical communication network integration test:
Test network transmission performance and network management
functions in optical communication network integration.
Product features:
The optical attenuation and optical power output can be set quickly
and accurately, and the optical power control stability time is
less than 200 ms.
Multi-channel attenuator is set at the same time, and multiple
ports are measured simultaneously, which saves a lot of measurement
time;
Built-in high-precision optical power meter ensures the stability
and accuracy of power monitoring;
Simple operation, intuitive graphical user interface, multi-channel
data preview, test status at a glance.
Small size, compact structure, two 4-channel devices cascaded, can
be identified as an 8-channel device to use.
Specification
| 型号 Model # | U8748 |
| Attenuator Range | 0~35 dB(40dB Type) |
| Calibration Wavelength (Option) | 850 nm (Other wavelengths are optional) |
| Insertion Loss | ≤ 1.8 dB Type 1.5dB |
| Fiber Type | 50/125um, 62.5/125um MMF self-adaptation |
| Connector Type | FC/UPC Connector |
| Attenuation Accuracy | ± 0.20 dB (0 ~ 20 dB), ± 0.30 dB (20 ~ 35 dB) ± 0.05 dB (0 ~ 30 dB With Power control) |
| Repeatability | ±0.05 dB |
| Averaging time of monitor PM | 2~1000 ms |
| Settling Time | 200ms |
| Attenuation Transition Speed | 0.1 ~ 35 dB/s |
| Return Loss | > 25 dB |
| Communication Interface | RS232, USB, RJ45 Control by PC |
| Maximum safe input power | +17dBm (Power monitoring status) |
| Recalibration Period | 2 years |
| Operation Temperature | 0～ +40℃ |
| Storage Temperature | -30～+80℃ |
| Power | 100~240 V |
| Dimensions | 245mm W, 105mm H, 320 mm D |
| Weight | 5 kg |
Note: U8741 is single-channel, U8742 is dual-channel, and U8748 is
8-channel.
Principle of attenuator:
An attenuator is a circuit used to introduce a predetermined
attenuation within a specified frequency range. It is generally indicated by the number of decibels introduced and
the number of ohms of the characteristic impedance. Attenuators are widely used in cable TV systems to meet the level
requirements of multiple ports. Such as amplifier input, output level control, branch attenuation
control. Attenuators Passive attenuators and active attenuators two types. The active attenuator is combined with other thermal elements to
form a variable attenuator, which is used in an amplifier for
automatic gain or slope control circuits. Passive attenuators have fixed attenuators and adjustable
attenuators.
