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SDG7000A User Manual
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133
Application example: Set a PRBS with the following parameters using CH1 as
differential "+" and CH2 as differential "-"
External differential load 100Ω
Bit rate = 300 Mbps
LVPECL level
Length is PRBS-32
Rise/Fall edge = 1 ns
1. In "Output Setting", set the output mode of CH1 to "Single-ended" (see "Single-
ended/Differential Settings" for details), connect the "+" terminal of CH1 to the "+" end
of the 100 Ω differential load, and the "+" terminal of CH2 to the "-" end of the 100 Ω
differential load
2. On the carrier parameter setting page of CH1, set the load to 50 Ω
3. Set the "Bit rate" to 300 Mbps;
4. Set "Logic Level" to "LVPECL", and the device will automatically set "Amplitude" to 800
mVpp and "Offset" to 2V;
5. Set length to PRBS-32;
6. Set ”Rise/Fall” to 1ns;
7. In the "Dual Channel" page, execute the "CH1-> CH2" operation of "Channel Copy" to
copy the parameters of CH1 to CH2. If you want CH2 links changes on CH1, turn on
"Freq Coupling", "Amplitude Coupling" and "Phase Coupling" in "Channel Coupling"
and set "Freq Ratio" = 1, "Ampl Ratio" = 1 "and" Phase Ratio"= 1 (see the section
"Channel Tracking/Coupling/Copy"for details);
8. In output settings, set the polarity of CH2 to “Invert”;
9. Turn on the output of both channels.
Following the above steps, the expected PRBS waveform can be output. The parameter page
after setting is as follows:
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