Qphy-usb software option, Appendix a – Teledyne LeCroy QPHY-USB User Manual
Page 65
QPHY-USB Software Option
QPHY-USB Operator’s Manual Rev F
65
APPENDIX A
Receiver Sensitivity Test Waveform Setup
This section describes the characteristics of the required waveforms used for device or hub receiver sensitivity
testing. Either a two channel pattern generator, such as the Agilent 81130A, or a two channel arbitrary waveform
generator (AWG) can be used. Two Tabor WW1281A one channel AWG can also be used with a specific
synchronization cable. The specific steps used to create the waveforms will vary depending on the model of
generator being used. Please consult the documentation for details.
MIN_ADD1
Description: IN Token of nominal bitrate and amplitude with the shortest allowable sync field (12 bits).
Bitrate: 480 Mb/s
High Level (both channels): 400 mV
Low Level (both channels): 0 mV
Pattern length: 44 bits
Repetition Rate: 2 us (both channels should be at 0 mV for 916 bits following the pattern)
Pattern bits:
1
2
3
4
5
6
7
8
9
10
11
12
CH1 (D+)
0
1
0
1
0
1
0
1
0
1
0
0
CH2 (D-)
1
0
1
0
1
0
1
0
1
0
1
1
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
CH1 (D+)
0
1
0
0
1
1
1
0
0
1
0
1
0
1
0
1
CH2 (D-)
1
0
1
1
0
0
0
1
1
0
1
0
1
0
1
0
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
CH1 (D+)
0
1
0
0
1
1
1
1
0
0
0
0
0
0
0
0
CH2 (D-)
1
0
1
1
0
0
0
0
1
1
1
1
1
1
1
1
IN_ADD1
Description: IN Token of nominal bitrate, amplitude and sync field (32 bits).
Bitrate: 480 Mb/s
High Level (both channels): 400 mV
Low Level (both channels): 0 mV
Pattern length: 64 bits
Repitition Rate: 2 us (both channels should be at 0 mV for 896 bits following the pattern)
Pattern bits:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
CH1 (D+)
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
CH2 (D-)
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0