Hemisphere GPS Crescent Vector H220, Руководство интегратора

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H220 Integrator Guide Appendix A- FAQ Page A2
Appendix A: Frequently Asked Questions
Integration
Do I need to use the 1 PPS and event marker?
No, these are not necessary for H220 operation.
What should I do with the 1 PPS signal if I do not want to use it?
We recommend you tie to ground through a 1k resistor.
What should I do with the manual mark input if I am not going to use it?
Do not connect the pin because this signal is active low.
Do I need to use the lock indicators?
No, these are present for applications where it is desirable to have an LED visible to the user.
These signals need to be transistor-buffered, as these lines can only offer 1 mA. Depending on
the product and the application, LEDs can be very useful to the end user. These signals are
active low.
Do I need to use a shield-can for the H220?
Not necessarily. But you may need to if there are RF interference issues, such as if the H220
interferes with other devices. A shield-can is a good start in terms of investigating the benefit. If
you are designing a smart antenna system, a shield can is likely needed. Hemisphere GNSS
recommends that you always conduct an RF pre-scan when integrating OEM boards.
If my company wishes to integrate this product, what type of engineering resources will I
need to do this successfully?
Hemisphere GNSS recommends you have sufficient engineering resources with the appropriate
skills in and understanding of the following:

Electronic design (including power supplies and level translation)

RF implications of working with GNSS equipment

Circuit design and layout

Mechanical design and layout
As an integrator, you are responsible for ensuring that the correct resources are in place to
technically complete integration. Hemisphere GNSS makes every effort to provide adequate
support, but you should expect to have reasonable expertise to use this Integrator’s Guide.