Other instruments and apparatus, specially designed for telecommunications (for example, cross-talk meters, gain measuring instruments, distortion factor meters, psophometers)
Oscilloscopes, spectrum analyzers and other instruments and apparatus for measuring or checking electrical quantities, excluding meters of heading 90.28; instruments and apparatus for measuring or detecting alpha, beta, gamma, X-ray, cosmic or other ionizing radiations. > Other instruments and apparatus, specially designed for telecommunications (for example, cross-talk meters, gain measuring instruments, distortion factor meters, psophometers) > Other instruments and apparatus, specially designed for telecommunications (for example, cross-talk meters, gain measuring instruments, distortion factor meters, psophometers)
Duty Rate (from China)
Products classified under Tariff item 9030.40.00
Bit Error Rate Tester
A Bit Error Rate Tester (BERT) generates predefined test patterns and measures bit error rates in digital telecommunications systems, including fiber optic and wireless networks. It is specially designed for telecommunications performance testing, making it classifiable under tariff item 9030.40.00.
Cross-Talk Meter
A cross-talk meter is a specialized instrument that measures unwanted signal interference between communication channels in telecommunications networks. It is explicitly listed as an example of instruments specially designed for telecommunications under tariff item 9030.40.00.
Distortion Factor Meter
A distortion factor meter quantifies harmonic and non-linear distortions in telecommunications signals to maintain voice and data quality. It is included as an example of telecom-specific apparatus under tariff item 9030.40.00.
Echo Canceller Test Set
An echo canceller test set evaluates echo cancellation performance in VoIP and telephony systems by injecting controlled echoes and measuring the cancellation effectiveness. It is specially designed for telecommunications testing, qualifying under tariff item 9030.40.00.
Group Delay Meter
A group delay meter measures signal phase delay variations across frequencies in telecommunications filters and transmission lines. It is specially designed for telecom applications, falling under tariff item 9030.40.00.
ISDN Protocol Tester
An ISDN protocol tester tests ISDN layer 1-3 protocols for digital telephony networks, verifying signaling and data integrity. It is specially designed for telecommunications, qualifying under tariff item 9030.40.00.
Jitter Measurement Instrument
A jitter measurement instrument measures timing variations in clock and data signals for synchronous telecommunications networks. It is specially designed for telecom timing analysis, falling under tariff item 9030.40.00.
Network Impairment Simulator
A network impairment simulator emulates packet loss, jitter, and latency in IP telecommunications networks for performance testing. It is specially designed for telecom simulation, qualifying under tariff item 9030.40.00.
Noise Figure Meter
A noise figure meter quantifies noise performance in telecommunications amplifiers and receivers using the Y-factor method. It is specially designed for telecom signal quality assessment, falling under tariff item 9030.40.00.
Optical Time Domain Reflectometer
An Optical Time Domain Reflectometer (OTDR) analyzes fiber optic cables by sending light pulses and measuring reflections to detect faults and losses. It is specially designed for telecommunications fiber infrastructure testing, qualifying under tariff item 9030.40.00.
Power Meter for Telecom Signals
A power meter for telecom signals is a specialized optical or RF power meter calibrated for telecom signal levels in dBm across fiber and antenna systems. It is specially designed for telecommunications, falling under tariff item 9030.40.00.
Protocol Analyzer for Telecom
A protocol analyzer for telecom captures and decodes telecom protocols like SS7 and Diameter for network diagnostics. It is specially designed for telecommunications, qualifying under tariff item 9030.40.00.
Psophometer
A psophometer measures weighted noise in telephone circuits using the psophometric curve for standardized audio assessment. It is specifically listed as an example under tariff item 9030.40.00 for telecommunications noise measurement.
Return Loss Meter
A return loss meter measures signal reflection (return loss) in telecommunications cables and components for impedance matching. It is specially designed for telecom applications, falling under tariff item 9030.40.00.
Signal Gain Measuring Instrument
A signal gain measuring instrument precisely measures amplification or attenuation of signals in telecommunications transmission lines and equipment. It is specially designed for telecommunications, qualifying under tariff item 9030.40.00.