PXIe-5665 Signal Path
- Updated2023-02-20
- 2 minute(s) read
PXIe-5665 Signal Path
An RF source signal takes the following paths from the PXIe-5665 front panel to the PXI Express controller, depending on your PXIe-5665 configuration and operating frequency range.
(3.6 GHz or 14 GHz) for Frequencies ≤ 3.6 GHz
- The RF source signal enters the PXIe-5603 or PXIe-5605 front panel at the RF IN connector.
- If you purchased the PXIe-5603 or PXIe-5605 with the optional preamplifier and have enabled the preamplifier, the signal source can be amplified, which can improve the noise figure.
- The PXIe-5603 and PXIe-5605 downconverters tune the signal to a center frequency and frequency-translate it to center around either 187.5 MHz, 190 MHz (PXIe-5605 only), or 199 MHz.
- The frequency-translated signal is filtered by the IF filter.
- The filtered signal passes from the RF downconverter module front panel IF OUT connector to the PXIe-5622 IF digitizer module front panel IF IN connector.
- The PXIe-5622 IF digitizer module filters and conditions the signal and applies gain and dither.
- The A/D converter (ADC) converts the signal from analog to digital.
- The onboard memory (buffer) receives digitally downconverted and resampled data.
- The PXI Express controller sends the data to the host computer.
(14 GHz) for Frequencies Between 3.6 GHz and 14 GHz
- The RF source signal enters the PXIe-5605 front panel at the RF IN connector.
- The optional preselector, which has a 47 MHz typical bandwidth and is used for frequencies > 3.6 GHz, can be enabled by the NI-RFSA driver to filter the RF input signal.
- The PXIe-5605 downconverter tunes the signal to a center frequency and frequency-translates it to center around either 187.5 MHz, 190 MHz, or 199 MHz, depending on the IF filter you select.
- The frequency-translated signal is filtered by the IF filter.
- The filtered signal passes from the PXIe-5605 RF signal downconverter module front panel IF OUT connector to the PXIe-5622 IF digitizer module front panel IF IN connector.
- The PXIe-5622 IF digitizer module filters and conditions the signal and applies gain and dither.
- The A/D converter (ADC) converts the signal from analog to digital.
- The onboard memory (buffer) receives digitally downconverted and resampled data.
- The PXI Express controller sends the data to the host computer.
In This Section
Related Information
- PXIe-5665 Block Diagram
The PXIe-5665 system includes the PXIe-5622, PXIe-5603/5605, and the PXIe-5653 modules. The block diagram for the PXIe-5665 differs based on your device configuration and operating frequency range.