RTL8305S 10 Base-T
IOL Test Report
RTL8305S with R-Bias 1.96KΩ for the all following 10-base test.
Summary:
Test
No.
(1)
(2)
(3)
(4)
Parameter
TP_IDL , Silence
Duration and
Silence Voltage
TD short Circuit
Fault Tolerance
Peak Differential
Output Voltage on
the TD Circuit
Harmonic Content
(5)
TD output Voltage
Template
(6)
Start of Idle with
specified load
(7)
TD Differential
Output impedance
(Return Loss)
(8)
Link Pulse
Waveform with
Specified Load
(9)
Transmitter
Waveform Jitter
with TP Model
(10) RD Differential
Output Impedance
(Return Loss)
(11)
TD Circuit
Common-Mode
Output Voltage
Ref. From
Standard
IOL Test
Suite
14.1.1
IOL Test
Suite
14.1.2.
IOL Test
Suite
14.1.3
IOL Test
Suite
14.1.4
IOL Test
Suite
14.1.5
IOL Test
Suite
14.1.7
IOL Test
Suite
14.1.8
IOL Test
Suite
14.1.10
IOL Test
Suite
14.1.11
IOL Test
Suite
14.2.3
IOL Test
Suite
Specification
Between
16+/- 8ms
Test Value
Result Page
10.45ms And Pass
15.75ms
2
< 300mA
214mA
Pass
4
2.2V to 2.8V
2.45V and
2.46V
pass
5
Less than
27dB
pass
fundamental
by 27dB
Within
Within limit Pass
Waveform
Limit
Within
Within limit Pass
Waveform
Limit
Above Limit Above Limit Pass
7
8
9
12
Within
Within limit Pass
Waveform
Limit
8.0BT +/- 11ns After 10us Pass
peak-to-peak
8.5ns
Above Limit Above Limit Pass
13
< 50mV peak Peak 32.8mV pass
19
1
17
18
Test (1).
TP_IDL , Silence Duration and Silence
Voltage
(a). Test Content:
Ref. IOL Ethernet Embedded MAU Conformance Test Suite test 14.1.1
(b). Test Result:
TP-Idle to Link Pulse Silence Duration: 10.45ms ~ 15.75ms
2
Link Pulse to Link Pulse Silence Duration: 15.8ms
(c). Discussion and Conclusion: Since Silence Duration shall between 16+/- 8ms,
the test passed.
3
Test (2).
TD short Circuit Fault Tolerance
(a). Test Content:
Ref. IOL Ethernet Embedded MAU Conformance Test Suite test 14.1.2. But we
use 1Ω resister to replace really short circuit. We can get short current from the
voltage number across this 1Ω resister.
(b). Test Result:
TD short current: 214mA
(c). Discussion and Conclusion: TD short current is 214mA < 300mA, and the TD
circuit can function properly after 10 second of short circuit. The test passed.
4
Test (3). Peak Differential Output Voltage
on the TD Circuit
(a). Test Content:
Ref. IOL Ethernet Embedded MAU Conformance Test Suite test 14.1.3
(b). Test Result:
Peak differential Volt. : 2.45 Volt ,-2.48 Volt
5
Peak differential Volt. : 2.46 Volt ,-2.48 Volt
(c). Discussion and Conclusion: Peak differential Volt. shall be between 2.2V to
2.8V, so the test passed.
6
Test (4). Harmonic Content
(a). Test Content:
Ref. IOL Ethernet Embedded MAU Conformance Test Suite test 14.1.4
(b). Test Result:
Max. Harmonic to Fundamental: 27dB
(c). Discussion and Conclusion: All harmonics shall be at least 27dB below
Fundamental, so the test passed.
7
Test (5).
TD output Waveform with Scaling of Voltage
Template
(a). Test Content:
Ref. IOL Ethernet Embedded MAU Conformance Test Suite test 14.1.5
(b). Test Result:
TD Voltage Template
(c). Discussion and Conclusion: The test passed.
8
Test (6). Start of Idle with specified load
(a). Test Content:
Ref. IOL Ethernet Embedded MAU Conformance Test Suite test 14.1.7
TP-Model are defined as IEEE802.3 Fig 14-7.
The specified loads are as Load 1 and Load 2.
180uH
115R
220uH
76.8R
Load 2
(b). Test Result:
Start of Idle with load 1 only
9
Start of Idle with load 2 only
Start of Idle with load 1 through TP-Model
10
Start of Idle with load 2 through TP-Model
(c). Discussion and Conclusion: The test passed.
11
Test (7).
TD Differential Output Impedance(Return
Loss)
(a). Test Content:
Ref. IOL Ethernet Embedded MAU Conformance Test Suite test 14.1.8
The test is only for reference resistance 100Ω.
(b). Test Result:
40
35
30
10M Tx Returnloss
dB
25
20
Limit
15
10
5
0
10
20
30
40
50
60
70
80
90 100
MHz
Absolute value of Return Loss
(c). Discussion and Conclusion: Since the absolute value of Return Loss are all
above15dB, the test passed.
12
Test (8).
Link Pulse Waveform with Specified Load
(a). Test Content:
Ref. IOL Ethernet Embedded MAU Conformance Test Suite test 14.1.10
TP-Model are defined as IEEE802.3 Fig 14-7.
The specified loads are as Load 1 and Load 2.
180uH
115R
220uH
76.8R
Load 2
(b). Test Result:
Link Pulse with Load 1 only
13
Link Pulse with Load 2 only
14
Link Pulse with Load 1 through TP-Model
15
Link Pulse with Load 2 through TP-Model
(c). Discussion and Conclusion: The test passed.
16
Test (9).
Transmitter Waveform Jitter with TP Model
(a). Test Content:
Ref. IOL Ethernet Embedded MAU Conformance Test Suite test 14.1.11
(b). Test Result:
Jitter after trigger by 10uS, peak-to-peak Jitter range =8.5ns
(c). Discussion and Conclusion: Since the conformance limit is 8.0BT +/- 11ns,
peak-to-peak Jitter range =22ns. The test result 8.5ns < 22ns. The test passed.
17
Test (10). RD Differential Output Impedance(Return
Loss)
(a). Test Content:
Ref. IOL Ethernet Embedded MAU Conformance Test Suite test 14.2.3
(b). Test Result:
40
35
10M Rx Returnloss
30
dB
25
Limit
20
15
10
5
0
10
20
30
40
50
60
70
80
90 100
MHz
Absolute value of Return Loss
(c). Discussion and Conclusion: Since the absolute value of Return Loss are all
above15dB, the test passed.
18
Test (11). TD Circuit Common-Mode Output Voltage
(a). Test Content:
Ref. IOL Ethernet Embedded MAU Conformance Test Suite test 14.1.9
(b). Test Result:
Peak Common-Mode Voltage: 32.8mV, -22.3mV
(c). Discussion and Conclusion: The common-Mode Voltage shall be less than
50mV
19
peak, so the test passed.
20