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 9028; instruments and apparatus for measuring or detecting alpha, beta, gamma, X-ray, cosmic or other ionizing radiations; parts and accessories thereof: > Other instruments and apparatus, specially designed for telecommunications (for example, cross-talk meters, gain measuring instruments, distortion factor meters, psophometers)
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.05, 9903.88.06, 9903.88.07, 9903.88.08, 9903.88.10, 9903.88.11, 9903.88.14, 9903.88.19, 9903.88.50, 9903.88.52, 9903.88.58, 9903.88.60, 9903.88.62, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(a) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(b) [to this subchapter]
Products classified under HTS 9030.40.00.00
Signal Gain Measuring Instrument
This device precisely measures amplification or attenuation of signals in telecom transmission lines and equipment. Classified under HTS 9030.40.00.00 for its special design for telecommunications applications like fiber optic and radio networks.
Optical Time Domain Reflectometer
OTDRs analyze fiber optic cables by sending light pulses and measuring reflections to detect faults and losses. Classified in HTS 9030.40.00.00 for telecom fiber infrastructure testing.
Echo Canceller Test Set
Test sets evaluate echo cancellation performance in VoIP and telephony systems by injecting and measuring echoes. Specially designed for telecom under HTS 9030.40.00.00.
Jitter Measurement Instrument
Measures timing variations (jitter) in clock and data signals for synchronous telecom networks. HTS 9030.40.00.00 for telecom timing analysis tools.
Power Meter for Telecom Signals
Specialized optical/rf power meters calibrated for telecom signal levels in dBm across fiber and antenna systems. Classified HTS 9030.40.00.00 for telecom use.
Protocol Analyzer for Telecom
Captures and decodes telecom protocols like SS7, Diameter for network diagnostics. HTS 9030.40.00.00 as telecom signal checking apparatus.
Return Loss Meter
Measures signal reflection (return loss) in telecom cables and components for impedance matching. Specially for telecom under HTS 9030.40.00.00.
Noise Figure Meter
Quantifies noise performance in telecom amplifiers and receivers using Y-factor method. HTS 9030.40.00.00 telecom example.
Group Delay Meter
Measures signal phase delay variations across frequencies in telecom filters and lines. For HTS 9030.40.00.00.
ISDN Protocol Tester
Tests ISDN layer 1-3 protocols for digital telephony networks. Telecom-specific under HTS 9030.40.00.00.
Cross-Talk Meter
A cross-talk meter is a specialized instrument designed to measure unwanted signal interference between communication channels in telecommunications networks. It falls under HTS 9030.40.00.00 as it is specially designed for telecommunications to ensure signal integrity by quantifying crosstalk levels.
Distortion Factor Meter
A distortion factor meter quantifies harmonic and non-linear distortions in telecom signals to maintain voice and data quality. It is included in HTS 9030.40.00.00 as a telecom-specific apparatus example.
Psophometer
Psophometers measure weighted noise in telephone circuits using the psophometric curve for standardized audio assessment. Specifically listed under HTS 9030.40.00.00 for telecommunications noise measurement.
Bit Error Rate Tester
BERT equipment generates test patterns and measures bit error rates in digital telecom systems like fiber and wireless networks. Falls under HTS 9030.40.00.00 as telecom-specific performance testing apparatus.
Network Impairment Simulator
These devices emulate packet loss, jitter, and latency in IP telecom networks for performance testing. HTS 9030.40.00.00 covers such specialized telecom simulation apparatus.