ACTC2020 Selective Level Meter Functional Overview:

Operating frequency range from 200Hz to 2000KHz, covering all spectra for carrier channels up to 300 channels, including voice channels, carrier channels, and communication cable/network cable transmission tests. Particularly suitable for testing channel attenuation, noise (clutter) interference, and harmonic distortion in power carrier systems; rapid capture and automatic measurement of transceiver signals; and performance testing of wave traps, coupling filters, etc. This instrument features a wide level measurement range, excellent selectivity, and low inherent distortion.

ACTC2020 Selective Level Meter Product Features:

● Intelligent, digital, one-button functional interface makes testing very simple.

● Compact size and lightweight. Weighs only about 1.5Kg.

● Automatic testing function for high-frequency relay protection channels.

● Frequency auto-search function, capable of simultaneously measuring unknown frequencies and their level values.

● The selective level meter can measure levels up to +41dB.

● Both coaxial and balanced inputs support four impedances: 75Ω, 100Ω, 600Ω, and ∞ (0Ω).

● Uses an electronic potentiometer for automatic level calibration.

● Frequency level step value can be arbitrarily set between 1Hz and 9.999KHz.

● Level testing features 10dB range switching and 0.1dB resolution.

● 320×240 Chinese character dot matrix large-screen LCD with LED backlight and full Chinese interface.

● Test results can be stored locally, read locally, and printed via computer.

● The local storage and reading functions allow viewing up to hundreds of test results at any time.

● Three power supply modes for AC/DC power:

A. AC: Powered by a 220V±10% (50Hz) AC adapter.

B. DC: Powered by built-in rechargeable lithium-ion battery;

External rechargeable lithium-ion battery power supply, with standby time of up to about 8 hours.

ACTC2020 Selective Level Meter Technical Specifications:

1.1 LCD Screen Size:

320×240 Chinese character dot matrix LCD screen, LED backlight, full Chinese interface.

1.2 Frequency Measurement Range:

Automatic frequency tracking range from 200Hz to 2000kHz, with input level greater than -40 dB.

A: Broadband: 10kHz～620kHz～1860kHz～2000kHz

B: Selective frequency: 200Hz～620kHz～2000kHz

Error from 200Hz to 2000KHz: ±2×10^－6

1.3 Frequency Response Error (based on 0dB range, 75Ω, 80KHz):

A: Broadband: 10kHz～620kHz         ±0.2dB

620kHz～2000kHz       ±0.5dB

B: Selective frequency: 200Hz～620kHz         ±0.2dB

620kHz～2000kHz       ±0.5dB

1.4 Level Measurement Range:

A: Broadband measurement range: (coaxial/balanced input) －50dB to ＋41dB

B: Selective frequency measurement range: (coaxial/balanced input) －100dB to ＋41dB

1.5 Level Range Switching Error (based on 75Ω, 0dB range, 80KHz): ±0.2dB

1.6 Zero Level Error (based on 75Ω, 0dB range, 80KHz):  ±0.2dB

1.7 Level Scale Error (based on 75Ω, 0dB range, 80KHz): ±0.2dB

1.8 Input Impedance:

Coaxial   75Ω, 100Ω, 600Ω, ∞ (high impedance)

Balanced   75Ω, 100Ω, 600Ω, ∞ (high impedance)

1.9 Selectivity:

A: 20Hz bandwidth (suitable for testing frequencies below 10KHz)

Δа＝3dB bandwidth:      approx. 20Hz

±150Hz      stopband attenuation ≥60dB

B: 1.74KHz bandwidth (suitable for testing frequencies above 10KHz)

Δа＝3dB bandwidth:      approx. 1.74KHz

±6KHz       stopband attenuation ≥60dB

1.10 Inherent Distortion Attenuation:

200Hz to 2000KHz      increase sensitivity by 50 dB ≥60dB

1.11 Intermediate Frequency and Image Frequency Interference Attenuation:       ≥60dB

1.12 Return Loss:  ≥35dB

1.13 Balanced Input and Longitudinal Interference Attenuation:    0.2KHz to 620KHz    ≥40dB

1.14 Internal Inherent Noise: ≤ measurable level by 25dB

1.15 Level Time Stability: 1 hour approx. ±0.2dB; 7 hours approx. ±0.3dB

1.16 Level Temperature Stability: 0℃ to  +45℃         approx. ±0.2dB

1.17 Three Power Supply Modes for AC/DC Power:

A. AC: Powered by a 220V±10% (50Hz) AC adapter.

B. DC: Powered by built-in rechargeable lithium-ion battery;

External rechargeable lithium-ion battery power supply, with standby time of up to about 8 hours.

1.18 MTBF (Reliability): approx. 3000H

1.19 Safety Requirements:

Complies with Group II requirements of GB6587.1,

Rated operating range: 0℃ to +40℃

1.20 Power Consumption: approx. 4VA

1.21 Instrument Dimensions: 228 mm×140 mm×68 mm

1.22 Instrument Weight: approx. 1.5Kg