Wideband Downconverters

These downconverter models, featuring breakthrough frequency and bandwidth coverage for their size and cost, are available with 3 standard or 3 optional bandwidths, covering three frequency ranges from 100 kHz to 8 GHz, 18 GHz, or 27 GHz.

Model Frequency
Coverage
Standard
Bandwidth
Optional
Bandwidth
DC8G100 100 kHz
to
8 GHz
100 MHz (0 Hz IF),
40 MHz (35 MHz IF)
10 MHz (35 MHz IF)
160 MHz (0 Hz IF),
80 MHz (55 MHz IF)
10 MHz (35 MHz IF)
DC18G100 100 kHz
to
18 GHz
100 MHz (0 Hz IF),
40 MHz (35 MHz IF)
10 MHz (35 MHz IF)
160 MHz (0 Hz IF),
80 MHz (55 MHz IF)
10 MHz (35 MHz IF)
DC27G100 100 kHz
to
27 GHz
100 MHz (0 Hz IF),
40 MHz (35 MHz IF)
10 MHz (35 MHz IF)
160 MHz (0 Hz IF),
80 MHz (55 MHz IF)
10 MHz (35 MHz IF)

The downconverters feature bandwidths of 100 MHz (standard) or 160 MHz (optional) direct conversion (0 Hz IF) I and Q analog outputs. These wideband versions can be software configured for super-heterodyne mode with a bandwidth of either 40 MHz or 10 MHz (standard) on a single IF output centered at 35 MHz IF, or with a bandwidth of either 80 MHz (optional) on a single IF output centered at 55 MHz IF.

These wideband products are engineered for analyzing wideband digital communications - cell phone standards 3G/4G/LTE, WiFi, or general Vector Signal Analysis (VSA) applications involving broadband signals.

The Downconverter RF front end is a unique architecture, consisting of both super-heterodyne and direct conversion technologies that are software selectable.

The front-end processing blocks utilize up to 21 pre-select filters to mitigate input-related spurs and image responses. For manual control, testing and setup of the Ethernet connected Downconverters, programs are provided for network discovery, setting carrier frequency, RF / IF gain, filters, etc.

Frequency domain signal analysis of the Downconverter baseband output signals is done with the DynamicSignals Spectrum Analyzer program, SpectraScopeRT, supporting integrated digitizer and downconverter control, zoom amplitude and frequency display, cursors, and waveform signal storage/printing.

The Digitizers and Downconverters have full control and data acquisition support via Mathworks MATLAB, with example programs furnished to facilitate rapid signal processing and modulation analysis program development. Downconverter software APIs are included for C/C++, MATLAB and LabVIEW.

These solutions greatly extend the digitizers frequency range, and allow those developing applications in Surveillance, Signal Intelligence, Radar, EW, and R&D high performance, lower cost platforms for complex wideband RF and microwave signal analysis.







The Downconverter products, when combined with Signatec High Speed Digitizers, allow for complete real-time signal recording and analysis systems covering frequencies up to 27 GHz.



Portable or Rackmount 27 GHz Wideband Signal Recording Systems

Signatec PX14400D2 PCIe Digitizer solutions, with 14-bit resolution and real-time stream to disk support, allow easily configured turnkey signal recording solutions for signals up to 27 GHz.

The PX14400D2's frequency synthesized clock allows for the ADC sampling rate to be set to virtually any value from 20 MHz to 400 MHz, for maximum sampling rate flexibility with 14-bit A/D resolution.

The PX14400D2 supports real-time sustained PCIe data streaming at up to 700 MS/s (1.4 GB/s) per card, and is fully supported by mouse driven turn-key software featuring signal monitoring while recording.

The PX14400D2 also supports a 2nd optional FPGA, with an open programming environment, where user provided programs can perform signal processing operations in real-time before data is stored. Standard FPGA processing features that are furnished for typical applications include DDC, FIR Filter, and FFT.

Signatec Digitizers include a complete Windows based Scope Application that provides a virtual oscilloscope and allows the operator to view or edit all digitizer hardware settings as well as record and display acquisition data.

Complete PX14400D2 Signal Recording Systems are furnished fully tested and fully integrated with high-speed real-time data recording RAID storage. These systems are specially designed to maximize the operations and the sustained data streaming transfer rates from Signatec Digitizers to the Embedded PC and Data Storage System (DSS) with either solid state or mechanical based enterprise storage drive arrays.

The DSS volume is configured by default as a single Windows NTFS drive volume. As a standard Windows recognized drive volume, all standard Windows operating system access and file operations may be performed on it.

Rugged portable systems are typically configured with solid state based drive arrays with support for up to 18 solid state drives (maximum volume of 28.8 TB) that provides up to 5 hours of continuous signal data recording at the maximum 14-bit 700 MSPS rate without missing any data.

Rackmount systems can be configured with solid state or mechanical based drive arrays with support for up to 48 drives (maximum volume of 96 TB) that provides up to 17 hours of continuous signal data recording at the maximum 14-bit 700 MSPS rate without missing any data.



SpectraScopeRT - Real-Time Spectrum Analyzer Software

The provided real-time Spectrum Analyzer program, SpectraScopeRT, requires no programming and allows for the control of receiver center frequency and bandwidth, plus digitizer selection and functions. This program also features various X,Y display scale viewing options, multiple cursors, averaging, printing, save/recall of setups, and many other useful features for Spectrum Analyzer type functionality.

SpectraScopeRT Lite Edition supports viewing and capturing acquired data to onboard digitizer memory and is included at no additional charge with the purchase of a supporting digitizer model with the downconverter. SpectraScopeRT Professional Edition adds support for conducting real-time streaming operations of acquired data from the digitizer to the host PC system for signal recording applications and may be purchased separately.

SpectraScopeRT: Spectrum Analyzer Software

SpectraScopeRT showing:
  • Histogram
  • Composite Power Spectrum
  • Persistence Display
  • I Power Spectrum
  • Spectrogram
  • Time Domain Display

WiFi Power Spectrum

SpectraScopeRT showing:
  • A typical WiFi signal using peak hold (red trace) in super-heterodyne mode