AC Performance Measurement Report - RealTek
Description
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RTM875N-397 AC Performance Measurement Report
Measurement Equipment : Clock Rise Time / Fall Time Are Measured by Tektronix® 6804B with Single-ended Probe - Mainframe with 8.
0GHz Bandwidth - Mainframe with 20GS/s Sampling Rate - P7240 Active Probe with 4.
0GHz Bandwidth (input: 1.
0pF / 20K-ohm) Clock Jitter & Duty Cycle Are Measured by Tektronix® 6804B with Differential Probe - P7330 Differential Active Probe with 3.
5GHz Bandwidth (input: 0.
5pF / 100K-ohm) - Tektronix® Jitter Analysis 3® Jitter Measurement Software Measurement Environment : - Test board Measurement Item :
Differential Clock
- Slew_Rise & Slew_Fall - Vcross & ΔVcross - Cycle to Cycle jitter - Vmax & Vmin - Duty Cycle
Single-end Clock
- Slew_Rise & Slew_Fall - Duty Cycle Cycle to Cycle jitter
Measurement Summary From the measurement shown as follows, RTM875N-397 works good and meets all CLK Spec.
Measurement Signal: 1.
CPU0 CLOCK 4.
PCIE6 CLOCK 7.
PCI CLOCK 10.
Phase jitter 2.
CPU1 CLOCK 5.
PCIE11 CLOCK 8.
USB CLOCK 3.
SATA CLOCK 6.
DOT96 CLOCK 9.
REF CLOCK
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Measurement Condition
#1 Slew_Rise & Slew_Fall Of Differential Waveform : Rise and fall slew rate are measured differential waveform between +150mV and -150mV on the rising and falling edges of the clock.
(Reference CK505 spec page.
19 / 20)
#2 Vcross Of Differential Waveform : Absolute cross point= 0.
3 ~0.
55 V (Reference CK505 spec page.
19 / 20)
#3 ΔVcross Of Differential Waveform : Absolute ΔVcross <140 mV (Reference CK505 spec page.
19 / 20)
Datasheet pdf - http://www.
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#4 Cycle to Cycle jitter : Absolute Cycle to Cycle jitter <85 ps (Reference CK505 spec page.
19 / 20 & JEDEC JESD65-A page.
13)
#5 Vmax & Vmin : Vmax < 1.
15 V and Vhigh > -0.
3V.
Measure the Vmax & Vmin value by using Tektronix Scope “Vmax ” & “Vmin” function.
(Reference CK505 page.
18)
#6 Duty Cycle : Duty cycle specification is between 45 and 55%.
(Reference CK...
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