User's Guide
Getting Started with i90
CHCNAV i90 GNSS USER GUIDE | 2019-9 P a g e | 12
Port
Name
Description
IO port
• This port is a 7-pin LEMO connector that
supports RS-232 communications and
external power input.
• Users can use HCE320 Type-c Cable supplied
with the system to realize RS-232
communications between the receiver and
computer or controller. Also, users can use a
7-pin cable to transmit differential data to an
external radio.
USB port
• This port is a mini-USB connector that
supports USB communications.
• Users can use USB Cable supplied with the
system to download the logged data to a
computer.
Radio antenna
connector
• Connect a radio antenna to internal radio of
the receiver. And this connector is not used if
you are using an external radio.
2.3 Batteries and Power
2.3.1 Internal Batteries
The receiver has two rechargeable Lithium-ion batteries, which can be removed for charging.