Variable Resistor Attenuator
AT-50

This device is a variable resistor attenuator with a maximum attenuation of 61 dB when operated in the frequency band of DC to 3 MHz (DC to 200 kHz when Z = 600 Ω).

Equipment Category
Measuring instruments for transmission characteristics

It can be used for tuning tests and maintenance of communication devices in their carrier frequency ranges.

AT-50 is easy to carry, allowing it to be used for outdoor line testing, adjustment, and testing for unattended terminal stations.

Configuration example

Main Specifications

Main Specifications
Item Specifications
Capacitance induced attenuation error Impedance: 600 Ω
Attenuation/frequency Below 50 kHz 50～150kHz 150～200kHz
5 dB or lower ±0.05dB ±0.1dB ±0.3dB
5.1～40dB ±0.1dB ±0.2dB ±0.5dB
40.1～61dB ±0.2dB ±0.5dB ±1.0dB
Impedance: 75 Ω
Attenuation/frequency Below 500 kHz 0.5～3MHz
5 dB or lower ±0.05dB ±0.1dB
5.1～40dB ±0.1dB ±0.2dB
40.1～61dB ±0.2dB ±0.5dB
Attenuation 10dB × 5 steps
1dB × 10 steps
0.1dB × 10 steps
Maximum attenuation 61dB
Impedance 600 Ω (balanced), 75 Ω (unbalanced)
Used band 600Ω：DC～200kHz
75Ω ：DC～3MHz
Maximum input level +20dBm
Dimensions/mass W76 × H150 × D55 mm
1 kg or less (The projection is not included)