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Chapter 2 – QuickCarrier USB GPRS (MT100UCC-G2)
8
QuickCarrier Developer’s Guide
AT Commands
Multi-Tech provides the following AT Command Guides:
For Product
Reference Guides Title and Document Product Number
MT100UCC-G2
MT100UCC-G2-ED
GPRS AT Commands for Multi-Tech G2 Cellular Modems (S000463)
MT100UCC-EV2-N2
MT100UCC-EV2-N3
MT100UCC-EV2-N16
CDMA 1xEV-D0 AT Commands Reference Guide (S000482)
MT100UCC-H5
H5 AT Commands Reference Guide (S000574)
All reference guides are available:
●
●
By using the
Embedded Products
Developer’s Guide Request Form
on
Design Considerations
USB Power Considerations
●
Use a high speed USB cable that is as short as possible. It is recommended that you use a 12 inch cable.
Some computers with high speed USB connectors run additional cables to the mother board. The
additional length can then cause enumeration issues.
●
If possible, connect directly to the USB connector on the motherboard.
●
Use USB 3.0 ports if available because these ports are typically rated for more current.
●
The peak current measurements—which you can find in the power draw section for your model—show
that transmit spikes can happen. Although the bulk caps on the MT100UCC handle these spikes in most
cases, review your power design with the spikes in mind.
Noise Suppression Design Considerations
Adhere to engineering noise-suppression practices when designing a printed circuit board (PCB) containing
the QuickCarrier USB modem. Noise suppression is essential to the proper operation and performance of
the modem and surrounding equipment.
Any OEM board design that contains the QuickCarrier should consider both on-board and off-board
generated noise that can affect digital signal processing. Both on-board and off-board generated noise that
is coupled on-board can affect interface signal levels and quality. Noise in frequency ranges that affect
modem performance is of particular concern.
On-board generated electromagnetic interference (EMI) noise that can be radiated or conducted off-board
is equally important. This type of noise can affect the operation of surrounding equipment. Most local
government agencies have stringent certification requirements that must be met for use in specific
environments.
Содержание QuickCarrier USB MT100UCC Series
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Страница 24: ...Chapter 2 QuickCarrier USB GPRS MT100UCC G2 24 QuickCarrier Developer s Guide Mechanical Drawing ...
Страница 29: ...Chapter 3 QuickCarrier USB HSPA MT100UCC H5 QuickCarrier Developer s Guide 29 Mechanical Drawing ...
Страница 36: ...Chapter 4 QuickCarrier USB EV DO MT100UCC EV2 36 QuickCarrier Developer s Guide Mechanical Drawing ...