The FS5000 will inject a range of jitter profiles into the link. This jitter is independent of any jitter generated by the source transmitters. The jitter profiles are single-tone sine waves with controllable amplitude and frequency and are detailed below.
Jitter Programming Range at 2.5 Gb/s (PCI Express)
Range
Jitter Frequency
Jitter Amplitude
Low
High
Step Size
Min
Max
Step Size
(kHz)
(kHz)
(kHz)
(ps)
(ps)
(ps)
1
19.07
381.47
19.07
100
1200
20
2
457.76
2975.5
76.29
40
1200
20
3
3051.8
4882.8
152.59
40
1000
15
4
5035.4
6866.5
152.59
40
500
10
5
7019.0
9918.2
152.59
30
220
5
6
19989
19989
N/A
30
45
5
Jitter Programming Range at 3.125 Gb/s (Serial Rapid IO)
Range
Jitter Frequency
Jitter Amplitude
Low
High
Step Size
Min
Max
Step Size
(kHz)
(kHz)
(kHz)
(ps)
(ps)
(ps)
1
23.84
381.47
23.84
100
1200
20
2
476.84
2956.4
95.37
100
1200
20
3
3051.8
4386.9
190.73
30
1000
10
4
4577.6
5340.6
190.73
30
700
10
5
5531.3
6294.3
190.73
30
500
5
6
6485.0
7629.4
190.73
30
300
5
7
7820.1
9918.2
190.73
30
180
5
8
19836
19386
N/A
30
45
5
The Jitterlyzer software allows you to generate or inject jitter onto channels that you are testing. Here is an explanation of the various parts of the Jitter Injection User Interface:
Data Rate – This drop-down selection defines the data rate of the serial bus that the FS5000 is connected into. There are selections from 1250 Mbps to 3125 Mbps.
Jitter – This will switch the Jitter injection function ON or OFF and is controlled through the user interface.
Frequency – This control provides a wide range of selectable jitter frequencies ranging from 19.07Khz to 19.99Mhz. The selected value represents the frequency of the sinusoidal jitter imposed on the signals received into the Jitterlyzer and then transmitted back out onto the link.
Amplitude – This provides a selection of between 100mV and 1200mV in increments of 20mV. The selected value represents the amplitude of the sinusoidal jitter imposed on the signals received into the Jitterlyzer and then transmitted back out onto the link.
Differential Swing – This setting can range from 400 mV to 1600 mV and should be matched to the swing of the serial link being tested.
Enable Channels – These lights represent the serial channels on the link that will have the jitter specifications applied to them. They click on and off.
Apply – The control initiates the changes selected in this area of the GUI. It must be used for any new settings to take effect.
