Description
A shunt stepped attenuator is a simple design where the signal is fed through a fixed series resistor (Rin) and the shunt resistor (Rg), is selected from 48 values ranging from zero to infinity by means of a selector switch. Although a shunt design presents a variable input impedance to the signal source, this has little effect in practice and the benefits of a single resistor and switch in the signal path far outweigh any potential matching issues.
SHUNT type: Only two resistors in signal path
Switching type: MBB (Make Befor Break)
Number of steps: 48
Attenuation range: -60 dB … 0 dB
Attenuation per step: steps 1 to 11 – 2dB, 12 to 48 – 1dB
Contact material: Hard gold
Polished wiper and contact pins
Extremely short signal path
Channel matching: +/-0.1 dB
Resistance: 600R, 1K, 2K, 5K, 10K, 20K, 50K, 100K, 250 kohm or custom values
Mechanical life: > 50 000 cycles
CNC machined PA11 aluminium body
Precision ball bearing support
Shaft diameter: 6 mm
Indexing angle: 7,2 deg
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