Agilent Technologies E8257D, Руководство пользователя

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242 Chapter 12
Peripheral Devices
N5102A Digital Signal Interface Module
Parallel and Parallel Interleaved Port Configuration Clock Rates
Parallel and parallel interleaved port configurations have other limiting factors for the clock and
sample rates:
• logic type
• Clocks per sample selection
• IQ or IF digital signal type
Clocks per sample (clocks/sample) is the ratio of the clock to sample rate. For an IQ signal type, the
sample rate is reduced by the clocks per sample value when the value is greater than one. For an IF
signal or an input signal, clocks per sample is always set to one. Refer to
Table 12- 5 for the Output
mode parallel and parallel interleaved port configuration clock rates.
For Input mode, the maximum clock rate is limited by the following factors:
• sample size
• data type
• selected filter for Pre- FIR Samples
Refer to Table 12- 6 for the Input mode parallel and parallel interleaved port configuration clock
rates.
Table 12-5 Output Parallel and Parallel Interleaved Clock Rates
Logic Type Signal Type Minimum Rate Maximum Rate
LVDS IQ 1 x (clocks/sample) kHz the smaller of: 100 x (clocks /sample) MHz
or
400 MHz
IF 4 kHz 400 MHz
Other IQ 1 x (clocks/sample) kHz the smaller of: 100 x (clocks /sample) MHz
or
150 MHz
IF 4 kHz 150 MHz
Table 12-6 Input Parallel and Parallel Interleaved Clock Rates
Logic Type Data Type Minimum Rate Maximum Rate
N/A Samples 1 kHz 100 MHz
Pre- FIR Samples 1 kHz
50
a
MHz
a.The maximum sample rate depends on the selected filter when the data rate is Pre-FIR Samples. Refer to “Input Mode” on
page 254 for more information.