CY4636 WirelessUSB™ LP Keyboard Mouse Reference Design Kit User Guide, Doc. # 001-70355 Rev. *A
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A.5
Regulatory Testing Results
A.5.1
Introduction
The LP mouse was tested in a certified lab and meets FCC part 15, Subpart B, Title 47 CFR -Unin-
tentional radiators, FCC Part 15 Subpart C -Intentional radiators, and Industry Canada RSS-Gen.
The following table outlines the results of the testing.
Testing for the keyboard and bridge is expected in the near future.
Table A-5. EMC Test Results
A.6
Power Considerations
A.6.1
RDK Keyboard
A.6.1.1
Usage Model
The following usage models are considered for the RDK keyboard.
■
4 hours per day of 6 keystrokes per second, 5 days per week
■
24 hours per day with no activity, 2 days per week
■
A packet is transmitted on both key-up and key-down events
■
A 'keep alive' is transmitted for each key-down event
A.6.1.2
Current Measurements
Per the keyboard usage model, there are 6 keystrokes per second in the active state, and every key-
stroke includes one 'down key' packet, one 'up key' packet and one 'keep alive' packet. The test
mode firmware only sends out one 'down key' packet and one 'up key' packet for each keystroke.
Therefore, we need to set the typing rate to 8 keystrokes per second in test mode in order to con-
sume the equivalent power of the usage model. It is accomplished by changing the
KEYBOARD_TEST_MODE_PERIOD define in the config.h file to 50.
The following is the results of RDK keyboard current measurement
Test Parameter
FCC Limit
Measured Value
Margin
Spurious radiated
emissions
54 dBuV/m(Av)
50.5 dBuV/m
–3.5 dB
Spurious conducted
emissions
–20 dBc
–31.9 dBc
11.9 db
Power Spectral Density
8 cBm/3 kHz
–9.0 dBm/3 kHz
17.0 db
Output Power
30 dBm
2.3 mW
26.0 db
Occupied Bandwidth
>500 kHz
960 kHz
460 kHz
Conducted Band Edge
Compliance
20 dB below fundamental -27.0 dBc
7.0 db
Radiated Band Edge
Compliance at 2482 Mhz
54 dBuV/m(Av)
51.7 dBuV/m
–2.3 db
Industry Canada limit
–
–
Receiver Radiated Emis-
sions
46 dBuV/m(QP)
35.4 dBuV/m
–10.6 db