Installation Guide Part 3

NGL FX Installation Manual Rev. * 72 of 84
Figure 40: Typical Tuning on Filter C View
Note:
The TR4215 board exhibits some natural internal resonance around 8 MHz which does not need to be tuned out.
Because the signal is internal and the fact the Analog View is now multiplied by 2, the typical tuning should look like
the figure 40
Configuring the System for Asynchronous Noise
The Filter View ‘A’ shows excessive ‘spiky’ noise, which could also occur from a sweeper. This
results in poor tag detection, where the output filter display (Filter View 'D') will 'bounce' as much
as ½ a division.
Below is the Analog View (Filter View A) displaying the noise. This view is directly from the
output of the ADC and is control only by the hardware gain (RF gain). Gain for filter views C and
D are also control by the RX gain (software gain). This is important because if the system is
saturated before the signal is processed (before the ADC, but after the hardware receiver) the RF
gain will need to be reduced. For cases when the TX control is disabled (customers using non-
deactivatable tags), the RF gain should be reduced until the Saturation Indicator LED is not lit.
Below is a picture of the Analog View with a sweeper 8 feet away from the SAB.