Kerlink Wirnet iBTS Installation And Maintenance Manual page 102

The frequency response of 918-923MHz cavity filter is as follows:
1.8.3.6 920-925MHz cavity filter
The 920-925MHz cavity filter is typically dedicated to the Singapore market. The purpose of
this filter is to avoid saturation and desensitization of the LoRa receiver due to co-located
EGSM900 base stations.
The 920-925MHz cavity filter characteristics are detailed in the following table:
Characteristics
Center Frequency
Pass band
Insertion losses
Ripple
VSWR
Rejection
Impedance
Power Handling
Temperature
Connectors
Classification
Internal Use
Confidential
Strict confidential
Figure 60 : Frequency response of the 918-923MHz cavity filter
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Kerlink – 1 rue Jacqueline Auriol – 35235 THORIGNÉ-FOUILLARD
Wirnet iBTS
Specification
922.5 MHz
920-925MHz
≤3dB
≤1.2dB
≤1.3:1
≥60dB @ 880-915MHz
≥60dB @ 930-960MHz
50 ohms
≤10W
-30°C to+60°C
N-Female / N-Male
written authorization of Kerlink
Kerlink m2m technologies reserved rights
Document title : Installation and
Maintenance Manual
Version : 2.0
Author : SNI
Date : 04/12/2018
Page 102 / 221