Radio Power Setting to Meet Licensed ERP

The 450 MHz RTK system has been designed to meet a wide range of possible configurations. This gives the end user the ability to optimize the system for their specific location and application. The end user must obtain a site license from the local spectrum authorities. It is the end user’s responsibility to ensure that 450 MHz RTK system parameters are configured correctly. Frequency, bandwidth, output power and antenna height must all conform to the granted license.

The frequency, bandwidth and output power of the John Deere 450 MHz radio are programmable by the StarFire™ receiver. The available ranges are:

Frequency	435 – 470 MHz
Frequency Resolution	12.5 kHz
Bandwidth	12.5 or 25 kHz
Radio Output Power	0.2 to 2.0 W
Amplifier Output Power	5.0 to 50.0 W

When installing a base station, the total output power of the system must be adjusted to comply with the granted license. Cable losses, connection losses and the antenna gain must be considered when calculating the total system output power. The radio output power is configured using GreenStar 2 System™ Display. Equivalent Radiated Power (ERP) of the radio should be adjusted to ensure that the total 450 RTK system output power complies with the license granted by the local spectrum authority. The following tables can be used to determine the appropriate setting.

Radio Only Power Output
	No Coax			15 in. (4.6 m)			100 in. (30.5 m)			200 in. (61 m)
LRS-455 Output Power Watts	2 dBi Whip	5 dBi Magnetic Mount	7 dBi Base	2 dBi Whip	5 dBi Magnetic Mount	7 dBi Base	2 dBi Whip	5 dBi Magnetic Mount	7 dBi Base	2 dBi Whip	5 dBi Magnetic Mount	7 dBi Base
2.0	3.2	6.3	—	2.8	5.6	8.9	2.0	3.9	6.2	1.2	2.5	3.9
1.6	2.5	5.0	—	2.2	4.5	7.1	1.6	3.1	4.9	1.0	2.0	3.1
1.3	2.0	4.0	—	1.8	3.6	5.6	1.2	2.5	3.9	0.8	1.6	2.5
1.0	1.6	3.2	—	1.4	2.8	4.5	1.0	2.0	3.1	0.6	1.2	2.0
0.8	1.3	2.5	—	1.1	2.2	3.6	0.8	1.6	2.5	0.5	1.0	1.6
0.6	1.0	2.0	—	0.9	1.8	2.8	0.6	1.2	2.0	0.4	0.8	1.2
0.5	0.8	1.6	—	0.7	1.4	2.2	0.5	1.0	1.6	0.3	0.6	1.0
0.4	0.6	1.3	—	0.6	1.1	1.8	0.4	0.8	1.2	0.2	0.5	0.8
0.3	0.5	1.0	—	0.4	0.9	1.4	0.3	0.6	1.0	0.2	0.4	0.6
0.3	0.4	0.8	—	0.4	0.7	1.1	0.2	0.5	0.8	0.2	0.3	0.5
0.2	0.3	0.6	—	0.3	0.6	0.9	0.2	0.4	0.6	0.1	0.2	0.4

Radio and Amplifier Power Output
	No Coax			15 in. (4.6 m)			100 in. (30.5 m)			200 in. (61 m)
LRS-455 Output Power Watts	2 dBi Whip	5 dBi Mag Mnt	7 dBi Base	2 dBi Whip	5 dBi Mag Mnt	7 dBi Base	2 dBi Whip	5 dBi Mag Mnt	7 dBi Base	2 dBi Whip	5 dBi Mag Mnt	7 dBi Base
2.0	79.2	158.1	—	70.6	140.9	223.3	48.9	97.5	154.5	30.8	61.5	97.5
1.6	62.9	125.6	—	56.1	111.9	177.4	38.8	77.4	122.7	24.5	48.9	77.4
1.3	50.0	99.8	—	44.6	88.9	140.9	30.8	61.5	97.5	19.5	38.8	61.5
1.0	39.7	79.2	—	35.4	70.6	111.9	24.5	48.9	77.4	15.5	30.8	48.9
0.8	31.5	62.9	—	28.1	56.1	88.9	19.5	38.8	61.5	12.3	24.5	38.8
0.6	25.1	50.0	—	22.3	44.6	70.6	15.5	30.8	48.9	9.7	19.5	30.8
0.5	19.9	39.7	—	17.7	35.4	56.1	12.3	24.5	38.8	7.7	15.5	24.5
0.4	15.8	31.5	—	14.1	28.1	44.6	9.7	19.5	30.8	6.2	12.3	19.5
0.3	12.6	25.1	—	11.2	22.3	35.4	7.7	15.5	24.5	4.9	9.7	15.5
0.3	10.0	19.9	—	8.9	17.7	28.1	6.2	12.3	19.5	3.9	7.7	12.3
0.2	7.9	15.8	—	7.0	14.1	22.3	4.9	9.7	15.4	3.1	6.1	9.7