Andrew Wireless Innovations Group RPT-MR801 User Manual
M0050A0B.doc
Id.-No. 148222
Page 4 of 12
11-Mar-99
In Fig. 2 we have the same filters but this time with different centre frequencies. The centre
frequency of filter 1 is this time 912.5 MHz and the centre frequency of filter 2 is again
900 MHz. Consequently, we get another overall response of the module as can be seen in
fig. 2. Filter 1 limits the frequency range towards lower frequencies and filter 2 towards
higher frequencies. The resulting response is thus an attenuation of 80 dB up to 881.25 MHz,
40 dB up to 893.25 MHz, 3 dB bandwidth is 12.5 MHz from 900 MHz to 912 MHz, 40 dB
attenuation from 918.75 MHz and 80 dB from 931.25 MHz. (Values exemplary!)
frequency of filter 1 is this time 912.5 MHz and the centre frequency of filter 2 is again
900 MHz. Consequently, we get another overall response of the module as can be seen in
fig. 2. Filter 1 limits the frequency range towards lower frequencies and filter 2 towards
higher frequencies. The resulting response is thus an attenuation of 80 dB up to 881.25 MHz,
40 dB up to 893.25 MHz, 3 dB bandwidth is 12.5 MHz from 900 MHz to 912 MHz, 40 dB
attenuation from 918.75 MHz and 80 dB from 931.25 MHz. (Values exemplary!)
It is shown in the following how the centre frequency and the bandwidth of the module can be
set to desired values.
set to desired values.