Partner Product

Model 6230  (147)
Model 6230 is a general-purpose 32-channel narrowband digital receiver VIM-4 module. It attaches directly to VIM-compatible processor boards and connects directly to all four processors.

Front End

The Model 6230 accepts four analog RF

inputs on front panel SMA connectors. Input

amplifier bandwidth of 90 MHz supports

direct IF undersampling. Each input is

amplified and, optionally, lowpass filtered

to remove out-of-band signals and prevent

aliasing. The filters may be bypassed for

undersampling applications.

Optionally available, transformer-coupled

inputs reduce distortion for input signals

above 10 MHz and are recommended for IF

undersampling applications.

Each of the four inputs is then digitized

by a 14-bit A/D converter which is capable

of operating at sample rates up to 65 MHz

(Analog Devices AD6644) or, optionally,

80 MHz (AD6645). The A/D converter

clock can be driven from an internal 64 MHz

or 80 MHz crystal oscillator or from an external

sample clock supplied through a front

panel SMA connector.

Digital Downconverters

The 6230 includes eight Graychip

GC4016 quad narrowband digital

downconverter chips. The maximum input

sampling rate for the GC4016 is 80 MHz.

Each device includes four independently

tuned channels capable of center frequency

tuning from DC to 32 MHz, and with output

bandwidths ranging from 3.2 kHz to

1.6 MHz (for 64 MHz sample clock).

Each GC4016 accepts four 14-bit parallel

inputs from the four A/D converters. Internal crossbar switches allow all 32 receiver

channels on the board to select any of the

four A/D inputs for flexible switching.

Synchronization

The front panel clock and sync bus allow

one 6230 to act as a master, driving the

sample clock out to a front panel cable bus

using LVDS differential signaling. Multiple

slaves can then be clocked synchronously

with the master. Additional sync lines allow

synchronization of the local oscillator phase,

frequency switching, decimating filter phase,

and FIFO data collection on multiple 6230’s.

147
*Four 65 or 80 MHz, 14-bit A/D converters * Front panel FPGA I/O connector *All downconverters can select any of the four inputs *90 MHz input bandwidth *3.2 kHz to 1.6 MHz output bandwidths for ƒS = 64 MHz *Front panel clock and sync bus to sync multiple boards
Model 6230
Front End The Model 6230 accepts four analog RF inputs on front panel SMA connectors. Input amplifier bandwidth of 90 MHz supports direct IF undersampling. Each input is amplified and, optionally, lowpass filtered to remove out-of-band signals and prevent aliasing. The filters may be bypassed for undersampling applications. Optionally available, transformer-coupled inputs reduce distortion for input signals above 10 MHz and are recommended for IF undersampling applications. Each of the four inputs is then digitized by a 14-bit A/D converter which is capable of operating at sample rates up to 65 MHz (Analog Devices AD6644) or, optionally, 80 MHz (AD6645). The A/D converter clock can be driven from an internal 64 MHz or 80 MHz crystal oscillator or from an external sample clock supplied through a front panel SMA connector. Digital Downconverters The 6230 includes eight Graychip GC4016 quad narrowband digital downconverter chips. The maximum input sampling rate for the GC4016 is 80 MHz. Each device includes four independently tuned channels capable of center frequency tuning from DC to 32 MHz, and with output bandwidths ranging from 3.2 kHz to 1.6 MHz (for 64 MHz sample clock). Each GC4016 accepts four 14-bit parallel inputs from the four A/D converters. Internal crossbar switches allow all 32 receiver channels on the board to select any of the four A/D inputs for flexible switching. Synchronization The front panel clock and sync bus allow one 6230 to act as a master, driving the sample clock out to a front panel cable bus using LVDS differential signaling. Multiple slaves can then be clocked synchronously with the master. Additional sync lines allow synchronization of the local oscillator phase, frequency switching, decimating filter phase, and FIFO data collection on multiple 6230’s.
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Hardware
Model 6230 is a general-purpose 32-channel narrowband digital receiver VIM-4 module. It attaches directly to VIM-compatible processor boards and connects directly to all four processors.