              For immediate release

For sales information, contact Lisa Tardette, 203-666-1541
For other information, contact ARRL Technical Information Service, 203-666-1651

ARRL Radio Designer
Heavyweight RF CAD features without a heavyweight price

If you've done any hobby computer-aided design, you've probably used CAD
mainly for designing and enhancing your antenna system.  Now with your PC and
ARRL Radio Designer you'll be able to build, test and evaluate audio and
radio circuits without warming up your soldering iron, running out of parts,
or investing in a benchful of expensive test equipment. 

Here's what you and ARRL Radio Designer will accomplish quickly and easily:
  Model passive and small-signal linear circuits from audio to RF.
  Do "what if" circuit modifications without tedious cut-and-try
    experimentation and measurement. 
  Predict and analyze performance of linear, small-signal active and passive
    dc, audio and RF circuitry, including amplifiers, filters, matching
    networks and power splitters and combiners.  
  Enter circuits in a netlist form using the text-based Circuit Editor.
  Optimize circuit performance to meet goals you specify.
  Display the signal level at any point in a simulated circuit with Voltage
    Probe. 
  Simulate component value variations due to temperature and tolerances with
    Monte Carlo statistical analysis. 
  Simulate circuit performance in response to a steady-state time-domain
    signal using impulse, step, pulsed carrier or user-defined stimuli. 
  Synthesize matching networks with Circles, an interactive Smithr Chart
    utility. 
  Use manufacturer-supplied noise and S-parameter device data for highly
    realistic circuit simulations. 

ARRL Radio Designer simulates and reports

  S, Y, Z, group delay and voltage probe parameters for n-port networks;
  Chain (ABCD), hybrid (H), inverse hybrid (G), gain, voltage gain, and
    stability parameters for two-port networks; 
  magnitude of reflection coefficient, phase of reflection coefficient, VSWR
    and return loss parameters for one-port networks; 
  gain, gain matching and noise parameters; and complex S, Y, Z, H, G, 
    chain (A), gain matching, noise matching and voltage probe parameters.  

ARRL Radio Designer reports can be-

  Rectangular and polar graphs_onscreen and via any Windows compatible
    printer, in the colors, fonts and line weights you specify 
  Tables_onscreen, in file form and via any Windows compatible printer

ARRL Radio Designer 1.0's 28 Circuit elements include

  Active devices (bipolar and field-effect transistors, operational amplifier)
  "Black box" elements (two-terminal impedance specified by resistance and
    reactance; two-terminal one port specified by admittance, impedance or S
    parameters) 
  Controlled sources (current-controlled current, current-controlled voltage,
    voltage-controlled current, voltage-controlled voltage) 
  Lossy capacitors, inductors, coaxial cables and transmission lines
  Transformers (ideal two-and three-winding types, specifiable in terms of
    turns ratio or Impedance) 

Technical Specifications for ARRL Radio Designer 1.0 Analysis:

Maximum number of nodes per circuit block*	250
Range of node-number values			0 through 999
Maximum number of ports per circuit block	30
Maximum number of frequency steps		512
Maximum number of statistical histograms	20

*The number of circuit blocks allowed depends on their complexity; generally,
50 or more circuit blocks may be defined in a single ARRL Radio Designer
netlist. 


Minimum system requirements for ARRL Radio Designer 1.0

  386, 486 or Pentium IBM PC or 100% compatible (math coprocessor strongly
    recommended) 
  8 Mbytes of RAM
  Microsoft Windows 3.1 or higher
  3.5-inch, high-density floppy drive
  hard disk with at least 5 Mbytes of free space
  Mouse or equivalent pointing device

We're please to offer ARRL Radio Designer as your doorway into a new phase of
ham radio's growing computer tradition.  The package includes 2 - 3.5"
diskettes, circuit examples and a comprehensive reference manual.  ARRL order
no. 4882  Retail $150.00 (add $5.00 for UPS delivery.)  

ARRL Radio Designer is a derivative of Super-Compactr, an industry-standard
linear circuit simulator by Compact Software of Paterson, New Jersey. 

