Metrologic IS4910 Series Specifikace stáhnout pdf (Strana 56)

REGULATORY COMPLIANCE

EMI

The IS4920 consists of a 400MHz processor running a 100MHz SDRAM bus and

a camera interface capable of image transfer up to 48MHz. The IS4920 series

engine was designed to meet EN55022 Radiated Class B emission limits. Using

the system shown below, the IS4920 was able to meet these requirements with

an input voltage VIN = 3.3V and the camera interface operating at its maximum

frequency of 48MHz.

Figure 33. IS4920 EMI Test System

Components used in IS4920 EMI test system

Part Number

(Metrologic p/n)

Part Description/Function

IS4920-USB Imaging decode engine

77-77104A Imager to Decode Flex cable assembly (shielded)

77-77095A IS4920 test adapter board

52-52828 USB cable (A to B)

19-00329 12pin Host Flex cable

Given the Decoding platform architecture described above, it is follows that

harmonics of 48MHz and 100MHz were most prevalent.

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Metrologic IS4910 Series Specifikace Strana 56