6
Agilent N4916B Specifications
De-emphasis signal converter
Data rate 660 Mb/s to 14.2 Gb/s
1
Output format NRZ
Pre-cursor 0 to +12.0 dB/0.1 dB resolution
3
Post-cursor 1 0 to –12.0 dB/0.1 dB resolution
3
Post-cursor 2 0 to –8.0 dB/0.1 dB resolution
3
Cursor accuracy ± 1.0 dB typical at PCI Express 3.0
pre-sets for 8 Gb/s
Applies to serial numbers
MY51300500 or higher and
instruments upgraded with
N4916B-U14
Clock input, data input 50 Ω single ended, DC coupled
De-emphasis output 50 Ω differential, DC coupled.
Terminate unused output.
Output amplitude 100 mV to 800 mV single ended,
200 mV to 1600 mV differential
1
Output voltage window ± 2 V
Coupling DC, accepts unbalanced patterns
External termination voltage ± 2 V
Max. external voltages ± 2 V
Output transition times < 30 ps typical (20% - 80%)
1
Jitter added < 300 fs rms typical (0101 pattern)
Jitter transfer Transparent to clock jitter. Data and clock must carry the same amount of jitter and need to be in phase
2
Delay added 1.5 UI + 920 ps typical (including input and output adapters and ideal clocking at 0.5 UI)
Input voltage data input 1.26 Vpp, offset –0.79 V
Input voltage clock input 0.3 Vpp, offset 0 V
Connectors SMA female
1. For N4916B’s with serial numbers lower than MY51300500 that have not been upgraded with N4916B-U14 and are not controlled from N4903B
SW rev. 7.0 or higher, the following specifications apply: the max. bit rate is 10.5 Gb/s (overprogramming possible up to 13.5 Gb/s). The output
amplitude is 100 mV to 700 mV single ended, 200 mV to 1400 mV differential. The output transition times are < 40 ps typical (20% to 80%)
2. We recommend use of J-BERT N4903B’s Aux clock output to ensure these prerequisites are met. When using N4916B together with J-BERT
N4903A or ParBERT, jitter injection might be limited.
3. Polarity as depicted. Sum of all cursors cannot exceed maximum voltage output swing and window. The N4916B voltage amplitude Vpp is defined
as the maximum positive sum of all cursors (Vd) = |Pre Amplitude| + |Main Amplitude| + |Post1 Amplitude| + |Post2 Amplitude|; this is in
reference to the PCI Express 3.0 specification as shown in Figure 8
Figure 9. Front panel view of N4916B
Figure 8. Definition of nominal output amplitude and
de‑emphasis amplitude
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