EVK-7 / EVK-8 / EVK-M8 User Guide
UBX-14002502 - R10
Early Production Information
Device description
Page 12 of 25
4.3.9
LED
On the front panel of the unit, a single blue LED shows the time pulse 1 signal. The LED starts
flashing one pulse per second during a GNSS fix. If there is no GNSS fix, the LED will only light, without
flashing.
4.3.10
Backup Battery
There is a backup battery in the evaluation unit. This is necessary to store orbital information
between operations and to enable faster start-up. It is a RENATA 3.0 V Li / MnO
²
battery of the type
CR2450. The battery has a rated capacity of 540 mA. The battery operating temperature range is -
40° C to +85° C.
In case the built-in backup battery runs low or empty after a long storage period, purchase the above
described battery for replacement (refer to the section 10 for battery replacement guidelines).
⚠
CAUTION! RISK OF EXPLOSION IF BATTERY IS REPLACED BY AN INCORRECT TYPE. DISPOSE
OF USED BATTERIES ACCORDING TO THE INSTRUCTIONS!
4.3.11
GNSS Configuration
The EVK-7 and EVK-8 supports GPS, QZSS and GLONASS. The EVK-M8N/C and EVK-
M8MEVA/EVK-M8QEVA supports GPS, Galileo,
QZSS, GLONASS, and BeiDou.
The GNSS to be used can be configured on u-center (View
Messages View then UBX-CFG-GNSS).
For more information, refer to the
u-center User Guide [21], the u-blox 7 Receiver Description
including Protocol Specification [9] and u-blox 8 / u-blox M8 Receiver Description including Protocol
Specification [20].
4.3.12
RTC Configuration (EVK-7EVA and EVK-M8MEVA)
The EVK-7EVA and EVK-M8MEVA include the EVA-7M or EVA-M8M GNSS receiver with an external
RTC. By default, the EVA-7M or EVA-M8M module is not running in single crystal mode. The
EVK-7EVA and EVK-M8MEVA evaluation kits can be set to single crystal mode by using the
configuration string described in the EVA-7M Hardware Integration Manual [8] and the EVA-8M /
EVA-M8M Hardware
Integration Manual [18].
☞
Applying the configuration string results in a permanent change and cannot be reversed. The
current consumption is significantly higher in single crystal mode. For more information see the
EVA-7M Data Sheet [5], EVA-8M Data Sheet [25] and the EVA-M8 Data Sheet [13].
