This antenna receives the GSM signal for the telemetry or communication module located inside the cab. It is mounted on the cab roof or body panel and connects to the receiver unit that transmits machine data to a remote monitoring system. A damaged or corroded antenna base can cause intermittent signal loss, which prevents data transmission from the harvesting operation. The manufacturer specifies the original assembly to match the impedance and connector type of the cab-mounted receiver, ensuring consistent signal strength without additional adapters.