18 | Keysight | N4960A Serial BERT 17 and 32 Gb/s - Data Sheet
External high frequency band input
Configuration
Wide band low deviation external modulation input. External input is summed with SJ1, SJ2, and RJ. High
frequency band stress is not available when either low frequency PJ or external is selected.
DC to at least 350 MHz, determined by high frequency modulator. –3 dB BW » 320 MHz
peak sum of all SJ, RJ and external input applied to high frequency modulation input is limited. Refer to SJ
modulation range specification or Figures 25 and 26.
Modulation frequency range
Modulation Range
Low frequency (high deviation) modula- Periodic jitter (PJ) or external input. SJ, RJ and high frequency external modulation sources are not available
tion configuration
when either low frequency source is enabled.
Low frequency modulation frequency
range
PJ
External
1 Hz to 17 MHz
1 Hz to 4 MHz
Low frequency PJ modulation range
With no pattern generator head con-
nected to the Jitter port:
Front panel output frequency
1 to 16 GHz
0.001 to 100 UI for frequency ≤ 62.5 kHz
0.001 to (6.25E6/ PJ frequency) for frequency > 62.5 kHz to 17 MHz (see Figure 25)
With an N4951A/B pattern generator 0.001 to 50 UI for frequency ≤ 62.5 kHz
head connected to the Jitter port:
Front panel output frequency
> 2 GHz to 16 GHz
0.001 to (3.125E6/ PJ frequency) for frequency > 62.5 kHz to 17 MHz (see Figures 25 and 26)
Low frequency external modulation range
With no pattern generator head con-
nected to the Jitter port:
0.001 to 50 UI for frequency ≤ 68.4 kHz
0.001 to (3.42E6/modulation frequency) for frequency > 68.4 kHz to 4 MHz (see Figure 25)
Front panel output frequency
1 to 16 GHz
With an N4951A/B pattern generator 0.001 to 25 UI for frequency ≤68.4 kHz
head connected to the Jitter port: :
Front panel output frequency
> 2 GHz to 16 GHz
0.001 to (1.71E6/modulation frequency) for frequency > 68.4 kHz to 4 MHz (see Figure 25 and 26)
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