Handling Of Electrostatic Sensitive Devices; Wiring; Noise Sources; Nordic Processor Unused Pins - Globalstar ST100 User Manual

8545-0194-01 v1.0

2.4. HANDLING OF ELECTROSTATIC SENSITIVE DEVICES

Some components on the ST100 PCB are sensitive to electrostatic discharge (ESD). The following general guidelines can help
reduce damage due to ESD.
1. Use a grounding bracelet if possible, to minimize charge build-up on personnel.
2. Handle the ST100 PCB by the long edges without touching components or printed circuit paths. The long edges measure
approximately 2" (50.8mm). The short edges measure approximately 1" (25.4mm). NOTE: There are ESD sensitive devices
located closer to the short edges than the long edges.
3. Store the ST100 PCB in static sensitive packaging whenever possible.
NOTE: Failure to adhere to ESD guidelines will void the product warranty.

2.5. WIRING

If the ST100 will be line-powered, proper installation and field wiring practices are important to follow. Users and installers
should familiarize themselves with the requirements of all applicable codes, laws, and standards.

2.6. NOISE SOURCES

Electrical noise is an important consideration in any installation of the ST100. When possible, sufficient physical separation
should be maintained between electrical noise sources and the ST100.

2.7. NORDIC PROCESSOR UNUSED PINS

Due to its sensitivity to IR light, the Nordic processor is covered with opaque, light-blocking epoxy.
Tests have shown that if unused pins on the Nordic processor are set as input without internal pulldowns enabled, the epoxy
will cause higher current draw in low power mode.
It is strongly advised to not leave unused Nordic pins at high impedance (input without internal pulldown).

2.8. OBSTRUCTIONS

If the internal ST100 Bluetooth and/or GPS/Satellite antennas are used, care should be taken as to what is placed above,
below, and around the short edges of the PCB. The short edges are where the ST100 internal antennas are located. For best
performance, the ST100 should have an unobstructed view of the sky, either outdoors or in a glass-enclosed area such as a
vehicle dashboard.

2.9. PCB ANTENNA

REGULATORY NOTE: The ST100 was certified with its Satellite and Bluetooth PCB Trace antennas. Use of any external
antenna will require additional regulatory testing.
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