SRXL Mezzanine

SRXL Mezzanine
Xilinx Spartan 3 | IF and L-band receiver

The SRXL is a mezzanine board that pairs with an EDT main board (for PCI or PCI Express) to accept simultaneous RF inputs in the L-band range of 925 to 2175 MHz and the IF range of 65 to 225 MHz.

Each input is processed with a tunable quadrature down-converter. The resulting baseband I and Q signals are low-pass filtered and digitized with 12-bit precision at programmable sample rates up to 65 MHz.

The resulting four channels of digital sample data are available as inputs to the Xilinx Spartan 3 FPGA, which is programmable to perform signal processing or to serve as a configurable switch matrix to route data to the main board and up to two 4-channel digital down-converter Graychips (GC4016).

For details on system requirements and EDT-provided software driver packages, see specifications for your EDT main board (PCIe8 LX, PCI GS, or legacy PCI SS).

The SRXL is similar to the SRXL2. The main differences are shown below.

FPGA Xilinx Spartan 3 Xilinx Virtex 4 SX
Graychips 2 4 or 0
L-band 925 to 2175 MHz (66 MHz bandwidth); 5 MHz tuning resolution 900-2250 MHz (115 MHz bandwidth); 500 kHz tuning resolution


65 to 225 MHz (46 MHz bandwidth); 1 MHz tuning resolution 160 or 140 MHz
(70 MHz bandwidth),
70 MHz (40 MHz bandwidth), or other frequencies below 90 MHz with a direct sampling path
Sample clock Programmable to any frequency from 1 to 65 MHz Programmable to any frequency from 10 to 250 MHz
Time code input


None 1 pps, IRIG-B, or other other inputs, with user-configurable output
Main board


PCIe8 LX, PCI GS, or (legacy) PCI SS PCIe8 LX or PCI GS



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