Stonex S9i GNSS Receiver – User Manual 29
430 MHz, 430-450 MHz and 450-470 MHz. the corresponding antennas have
length of: 40, 37,5 and 34 cm. The antenna gain is 2.15 dBi.
Figure 6 - 4 built-in radio antenna (not in scale)
S9i adopts a GPRS/GSM all-direction transmitting and receiving antenna .
The length is about 21.5 cm, the gain is around 1.8-2.2/2.1-3 dBi in accord to
the used frequency band.
Figure 6 – 5 GPRS/GSM antenna (not in scale)
Additional accessory (not included in the standard configuration) is a high-
gain UHF all-directional transmitting antenna for base setup. The available
frequency ranges are: 410-430 MHz, 430-450 MHz and 450-470 MHz. The
antenna is around 1meter long and can be mounted on a retractable pole or
a tripod ( for better performance ). The higher the antenna is, the larger
cover area does it has for the radio signal. The gain of the antenna is 5 dBi.
Figure 6- 6 External radio antenna (not in scale)
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