AN599: Si4010 ARIB STD T-93 Test Results

Si4010 ARIB STD T- 93 TEST R ESULTS ( 3 1 5 M H Z )
1. Introduction
This document provides Si4010 ARIB STD T-93 test results when operating in the 315 MHz frequency band. The
results demonstrate full compliance under the ARIB STD T-93. All tests are performed using a 4010-DKPB434-BS
with a matching network modified for 315 MHz. The results can be duplicated by using the same configuration. Two
kinds of test signals were used for testing: OOK mode with 4.8 kbps data rate and FSK mode with 100 kbps data
rate and 50 kHz frequency deviation.
All settings were used directly from the Excel Register Calculator for Si4010, version
si4010_calc_regs_100830.xls. The latest version of the calculator is available on the Silicon Labs website. For
measurement results with different RF parameters, contact customer support.
2. Relevant Measurements Limits
ARIB STD T-93 standard only pertains to radiated power, frequency tolerance, occupied bandwidth and unwanted
emission measurements. Limits for these tests are shown below in the Test Results section “4.2. Test Items and
Results” .
3. 4010-DKPB434-BS Schematic and Layout
Figures 1–5 show the modifications necessary for 315 MHz operation.
Figure 1. 4010-DKPB434-BS Schematic
Rev. 0.1 5/11
Copyright © 2011 by Silicon Laboratories
Figure 2. 4010-DKPB434-BS Layout—Top Layer Silk
Figure 3. 4010-DKPB434-BS Layout—Bottom Layer Silk
Rev. 0.1
Figure 4. 4010-DKPB434-BS Layout—Top Layer Routing
Figure 5. 4010-DKPB434-BS Layout—Bottom Layer Routing
Rev. 0.1
4. ARIB STD T-93 Compliance Results
Silicon Labs has tested the Si4010 chip and 4010-DKPB434-BS with a 315 MHz, –6 dBm matching network test
card for ARIB STD T-93 compliance. These ARIB compliance tests were performed in a conducted method by
Silicon Labs.
Note: Although the specification for ARIB T-93 covers radiated emissions, we show that we achieve compliance in a conducted test and so can easily meet the specification for radiated limits. This is of course dependant on antenna design
and some other factors which are beyond the scope of this document and should be reviewed carefully during board
4.1. Test Conditions
15–35° C
30–60 %
Atmospheric pressure:
950–1050 mbar
Test voltage:
DC 3 V
4.2. Test Items and Results
Below are test results showing that the Si4010 passed all tests.
1. Radiated Power
Radiated Power should be less than 250 µW e.i.r.p (312 to 315.25 MHz).
Note: Radiated Power should be less than 250 µW e.i.r.p when the center frequency of occupied bandwidth and frequency tolerance (sum of these) ranges from 312 to 315.25 MHz.
a. OOK MODE (4.8 Kbps)
i. The result is –6.79 dBm, less than 250 µW; PASSED
Figure 6. OOK Transmit Power
Rev. 0.1
b. FSK MODE (100 Kbps, 50 kHz frequency deviation)
i. The result is –6.54 dBm, less than 250 µW; PASSED
Figure 7. FSK Transmit Power
2. Tolerance of Radiated Power
Variation from rated power is only defined for upper side as +20% (maximum). Lower side is not defined.
a. Maximum radiated power variation is within the limits of +20% as seen in the results above.
3. Tolerance of Frequency
The transmitted frequency should be entirely between 312 and 315.25 MHz.
a. OOK mode
i. Test frequency is 315.0006 MHz. It is inside the "specific band". PASSED
Rev. 0.1
Figure 8. OOK Transmit Frequency
b. FSK mode
i. Tested frequency is 314.95560 MHz which is inside "specific band". PASSED
Figure 9. FSK Transmitting Frequency
Rev. 0.1
4. Occupied Bandwidth
1 MHz (when PN9 is applied at the actual transmission speed)
Note: When PN9 is not possible to use as a modulation source, it is acceptable to use actual system data as a source.
a. OOK mode
i. Tested OBW is 277 kHz, less than 1 MHz; PASSED
Figure 10. OBW in OOK Mode
b. FSK mode
i. Tested OBW is 230 kHz, less than 1 MHz; PASSED
Figure 11. OBW in FSK Mode
Rev. 0.1
5. Unwanted emission (spurious emissions and out of band emissions)
Less than 1 GHz: 250 nW e.i.r.p (RBW: 100 kHz)
Above1 GHz: 1 µW e.i.r.p (RBW: 1 MHz)
a. OOK mode
i. The maximum emission below 1 GHz is –45.86 dBm, less than 250 nW; PASSED
ii. The maximum emission above 1 GHz is –44.55 dBm, less than 1 µW; PASSED
Figure 12. Emissions below 1 GHz in OOK Mode
Figure 13. Emissions above 1 GHz in OOK Mode
Rev. 0.1
b. FSK mode
i. The maximum emission below 1 GHz is –47.96 dBm, less than 250 nW; PASSED
ii. The maximum emission above 1 GHz is –44.26 dBm, less than 25 µW; PASSED
Figure 14. Emissions below 1 GHz in FSK Mode
Figure 15. Emissions above 1 GHz in FSK Mode
Rev. 0.1
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Rev. 0.1