General Description
The Euvis FMC2657 module is a high-speed, dual-channel FMC module ideal for use in leading-edge applications. The FMC2657 generates dual CW waveforms with sampling rates up to 5 GSPS. The FMC2657 module is equipped with two Euvis MD657B digital-to-analog converters (DACs). At 5 GSPS, the module provides analog outputs with bandwidth from DC to 2.5 GHz (Nyquist bandwidth). It can be selected to operate in return-to-zero mode to extend the usable bandwidth to 2.5 ~ 5 GHz. The digital data multiplexing ratio is 4:1 and the required digital data rate is 1.25 Gb/s with DAC's operated at 5 GSPS. The 96 LVDS pairs of digital data are fed through two FMC connectors, a high-pin-count (HPC) and a low-pin-count (LPC). Sampling window select (SEL’s) and reset signals of two DAC’s can be independently controlled via the FMC connectors. The module includes two clock buffers to relax the need of high-power clock source. The amplitudes and duty cycles of the clock buffers can be programmed though the I2C interface.
Ordering and Pricing Information
For pricing information, please visit Pricing. For formal quotations, availabilities, and quantity-specific orders, please e-mail info@euvis.com, or call 1-805-583-9888.
Key Features
- Two 12-bit DACs
- Sampling rate range: 1 ~ 5 GSPS
- Selectable Return-to-Zero mode extend usable bandwidth to 2.5 ~ 5 GHz at 5 GSPS
- On-board clock buffers with adjustable gain and duty cycle
- +12 V and +3.3 V power provided by the carrier card
- VITA 57.1 standard compliant
Applications
The FMC2657 module can generate arbitrary patterns with high sample rates to be used for a variety of leading-edge applications, such as:
- Orthogonal Frequency Division Multiplexing (OFDM) transmitter
- Optical OFDM transmitter
- Ultra-Wideband transmitter
- Linear Frequency Modulation (LFM) and chirping
- Frequency Modulated Continuous-wave radar (FMCW)
- Electronic warfare
- VSAT satellite communications
- Test and measurement equipment
Module Photo:
Functional Block Diagram
Functional Specifications
| General | |
| Amplitude Resolution | 2 CH x 12 bits |
| Sampling | 1 ~ 5 GSPS |
| Input Clock | |
| Type | Single Ended, 50-Ω terminated |
| Connector Type | SMA |
| Frequency Range | 1 ~ 5 GHz |
| Power Level | +3 to +10 dBm (typical +6 dBm) |
| Analog Outputs | |
| Type |
Dual channel
Each channel is differential, 50-Ω terminated |
| Connector Type | SMA |
| Output Bandwidth |
Normal mode: DC ~ 2.5 GHz Return-to-Zero mode: DC ~ 2.5 GHz and 2.5 ~ 5 GHz |
| Output Level | -635 mV to 0 V |
| Output Power |
Normal mode: -4 dBm to 0 dBm Return-to-Zero mode: -3 ~ -7 dBm |
| Residual Phase Noise @ 10kHz from Carrier | < -130 dBc/Hz |
| Output Return Loss | 15 dB |
| Digital Data Inputs | |
| Connector | FMC High-Pin Count (HPC) and Low-Pin Count (LPC) |
| Logic | LVDS |
| Data MUX Ratio | 4 : 1 |
| Data Width | 48 pairs / Channel |
| DAC Control | |
| DAC Reset | FMC, LVDS Pairs |
| DAC Return-to-Zero Mode Select | FMC, LVCOMS25 |
| DAC Amplitude Control | FMC, I2C |
| DAC Sampling Window Select | FMC, LVCOMS25 |
| Clock Buffer Control | |
| Clock Amplitude | FMC, I2C |
| Clock Duty Cycle | FMC, I2C |
| Required DC Supplies | |
| + 12V | 0.8 A |
| + 3.3V | 150 mA |
Board Dimensions (mm)
| Edge Length (mm) | |||||
| a | 139 | b | 61.7 | c | 2.4 |
| d | 9.1 | e | 2.1 | f | 8 |
| g | 131.3 | h | 21.9 | i | 3 |
| j | 56.9 | Width | 139 | Height | 78.8 |
Test Setup
In applications, FMC2657 requires a VITA 57.1-compliant carrier board to provide all digital data, DAC controls, I2C
signals, and DC power via FMC connectors. The
carrier is required to provide both +12V and +3.3V power, with minimum current capacities of 1A and 500mA respectively.
Digital data and DAC resets are in LVDS pairs.
The DAC sampling selects and return-to-zero mode select are single-ended LVCMOS25.
The carrier board can be an advanced FPGA evaluation board, such as Xilinx VC707, with proper configurations.
The FMC2657 module is tested using Euvis carrier FMCC371.
The carrier consists of a Xilinx XC6VLX130T, a USB controller, and power modules.
In the test setup, the carrier is controlled by a PC host via the USB interface.
The carrier can store up to 2 x 16K words of data in memory.
The maximum data length is 4 μs at 4 GSPS for each channel.
Several built-in waveforms are available within the FMC GUI.
Waveform generation and download are performed in the GUI.
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