Each Amp channel also including two digital gain adjustable Amps, a digital LP-Filter and an anti aliasing filter just before the A/D-converter
Pre-Amp for the H-Field is tested for a long period and with different antennas and operating as intended.
E-Field is a slightly modifyed pre-amp as used in System RED
All analog circuitry is straightforward, but we need to test possible disturbance from the digital circuits surrounding the Amps - IT takes time because everything must sit properly on the final PCBs before ordering hundreds
We need an adaptation from the antenna to the amplifier via a cable - the cable must be properly terminated and therefore the easiest way is with a pre-amp, since the antenna impedance varies greatly.
Pre-Amp for the H-Field is tested for a long period and with different antennas and operating as intended.
E-Field is a slightly modifyed pre-amp as used in System RED
All analog circuitry is straightforward, but we need to test possible disturbance from the digital circuits surrounding the Amps - IT takes time because everything must sit properly on the final PCBs before ordering hundreds
We need an adaptation from the antenna to the amplifier via a cable - the cable must be properly terminated and therefore the easiest way is with a pre-amp, since the antenna impedance varies greatly.