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CY3631 WirelessUSB™ Manufacturing Test Kit User Guide, Doc. # 001-66724 Rev. *B
1.2
Appendix - B
1.2.1
Test Chambers
An anechoic RF test chamber, sized appropriately for the DUT with SMA pass through connectors is
required.
There are several important factors to consider when buying a chamber, such as the attenuation of
RF energy that comes into the box from outside, the attenuation of RF energy that is reflected from
the inside of the box, and the connectors for passing signals through the walls.
The requirements are as follows:
■
Attenuation of incoming RF energy:
30 dB at 2.4 GHz
■
Attenuation of reflected RF energy:
15 dB at 2.4 GHz (
7.5 dB each direction)
■
Connectors: One (1) SMA minimum
Many vendors sell test chambers that work. Following are some examples of units used before:
■
Mironix model ME8662E
■
Ramsey Electronics model STE2200 with optional CONN157. (A small box nicely sized for a
mouse or dongle, or small bare boards.)
■
Ramsey Electronics model STE3300 with optional CONN157.
■
Ramsey Electronics model STE4400 with optional CONN157. (Large enough for a full size
keyboard in plastic.)
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