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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html><head><title>Delta Electronics, Inc. Model RG-4B</title> </head> <body style="background-color: white;"> <center> <div style="text-align: center;"> <div style="text-align: center;"> <h2><img style="width: 598px; height: 102px;" alt="" src="../deltalogo.jpg"></h2> </div> </div> <h2 style="font-weight: bold;"><big>Model RG-4B Receiver/Generator</big></h2> <img style="width: 433px; height: 268px;" alt="" src="rg4b.jpg"><br> <br> </center> <hr style="height: 4px;"> <center> <h3>FEATURES</h3> <table style="background-color: rgb(255, 238, 204);" border="4" cellpadding="4" cellspacing="2"> <tbody> <tr> <td style="width: 50%;"> <ul type="square"> <li>Up to 2 Watts Output </li> <li>5 Microvolt Receiver Sensitivity </li> <li>120 dB Receiver/Generator Isolation </li> <li>100 kHz to 29.999 MHz Operating Range </li> <li>Digital Frequency Synthesizer Design </li> </ul> </td> <td> <ul type="square"> <li>Easy Keypad Entry Operation </li> <li>9 Frequency Storage Registers </li> <li>Coincidence Detector </li> <li>Large LCD Frequency Display </li> <li>Battery Pack for Portable Operation</li> </ul> </td> </tr> </tbody> </table> </center> <br> <hr> <h3>Introduction</h3> The RG-4B Receiver/Generator is Delta's newest model in its continuing line of precision RF generators and null detection receivers for impedance bridges. The RG-4B is designed as the ideal companion instrument for Delta's <a href="oib1&3.htm">OIB-1 and OIB-3 MF Operating Impedance Bridges </a>and <a href="oib2data.htm">OIB-2 HF Operating Impedance Bridge</a>. These bridges and the RG-4B form a complete portable impedance measuring system. <h3>Description</h3> The RG-4B operating frequency range is from 100 kHz to 29.999 MHz in 1 kHz steps. The generator output is adjustable to 10 V<font size="-2">RMS</font> (2 Watts), 100 kHz to 20 MHz, and 4 V<font size="-2">RMS</font> (0.3 Watts) above 20 MHz. Receiver sensitivity is 5 microvolts with separate front panel gain controls for RF and audio levels. Generator to receiver isolation is greater than 120 dB. <p> In noisy environments or under conditions of interfering signals, the generator can be modulated by an internal 50 Hz squarewave and the receiver's coincidence detector circuit will provide clean positive nulls. The generator can also be modulated by an internal 400 Hz signal at 90% modulation. When operated in this manner, the receiver provides both visual and audible null indications. </p> <p> Frequency selection is accomplished by a front panel keypad which controls a precision phase locked loop digital frequency synthesizer. The operating frequency is displayed on a large LCD front panel readout. To expedite field tests, nine storage registers provide recall of frequently used frequencies. Frequency increment and decrement keys provide manual sweeps of a chosen frequency in 1, 10, 100 or 1000 kHz steps. Separate 5 kHz increment and decrement keys simplify FCC required antenna impedance sweeps. Rechargeable batteries power the unit for field measurements for two and a half hours minimum at full RF output. The AC supply/charger operates from 120 or 240 VAC or optionally 100 or 200 VAC. The power supply will both power the unit and charge the batteries at the same time. Automatic switching to a "trickle" charge mode maintains full charge without battery damage. The lightweight construction combined with a rugged weatherproof aluminum case makes this instrument equally usable on the service bench or in the field. </p> <h3>Applications</h3> The RG-4B is designed to be used in conjunction with any conventional impedance bridge for antenna measurements in the AM Broadcast and HF bands. A dramatic improvement in signal-to-noise ratio will be realized when the RG-4B is used with the Delta Model <a href="oib1&3.htm">OIB-1</a>, <a href="oib2data.htm">OIB-2</a> and <a href="oib1&3.htm">OIB-3</a> Operating Impedance Bridges. The patented circuit of the OIB series of impedance bridges places the high level generator output directly in parallel with the interfering signals on the antenna. <p> With conventional bridges, the generator is attenuated by the measuring network of the bridge before competing with any interfering signals. Such operation can make nulling of the bridge difficult. </p> <p> Interference problems are virtually eliminated using the RG-4B/OIB combination. The excellent generator to receiver shielding and the dramatic improvement in the signal-to-noise ratio makes the RG-4B/OIB combination the consultant's choice for either HF or broadcast antenna impedance measurement applications.</p> <big><span style="font-weight: bold;"></span></big> <hr><big><span style="font-weight: bold;"><br> Optional Transport Case<br> <br> </span></big> A custom transport case is available for the RG-4B. The Hardigg Storm case incorporates a custom foam insert to securely protect the unit during transport. The lockable and airtight case includes casters with an extension handle. The order number for the RG-4B Transport Case is 746-0007.<br> <p style="text-align: center;"><img style="width: 335px; height: 408px;" alt="" src="rg4bcase.jpg"><br> </p> <h3 style="text-align: center;">RG-4B Transport Case</h3> <hr><br> <div style="text-align: center;"><strong>SPECIFICATIONS</strong></div> <br> <table style="text-align: left; margin-left: auto; margin-right: auto;"> <tbody> <tr> <td><strong>Frequency Range:</strong></td> <td>100 kHz to 29.999 MHz in 1 kHz steps</td> </tr> <tr> <td><strong>Generator/Receiver Isolation:</strong></td> <td>Greater than 120 dB</td> </tr> <tr valign="middle"> <td colspan="2" rowspan="1"><strong>Generator:</strong> </td> </tr> <tr valign="top"> <td> Output:</td> <td>100 kHz to 20 MHz, Adjustable to 10 V<sub>RMS</sub> (2W) into 50 ohms<br> 20 MHz to 27.5 MHz, Adjustable to 5 V<sub>RMS</sub> (0.5W) into 50 ohms<br> 27.5 MHz to 29.999 MHz, Adjustable to 4 V<sub>RMS</sub> (0.3W) into 50 ohms</td> </tr> <tr> <td> Modulation:</td> <td> 400 Hz 90% AM, 50 Hz square wave</td> </tr> <tr> <td> Output Connector:</td> <td>BNC Female</td> </tr> <tr> <td colspan="2" rowspan="1"><strong>Receiver:</strong> </td> </tr> <tr> <td> Type:</td> <td>Dual Conversion Superheterodyne with AGC</td> </tr> <tr> <td> Sensitivity:</td> <td> 5 �V Nominal</td> </tr> <tr valign="top"> <td> Selectivity:</td> <td> -3 dB Bandwidth: 3.8 kHz<br> -45 dB Bandwidth: 18 kHz</td> </tr> <tr> <td> BFO: </td> <td>On/Off, 455 kHz �3 kHz</td> </tr> <tr> <td> Audio Output: </td> <td>Internal speaker or headphone connected to front panel phone jack</td> </tr> <tr> <td> Input Connector: </td> <td>BNC Female</td> </tr> <tr> <td colspan="2" rowspan="1"><strong>Metering:</strong> </td> </tr> <tr valign="top"> <td> Battery (BAT)</td> <td>Battery or power supply voltage</td> </tr> <tr> <td> Generator (GEN)</td> <td>Generator output in V<sub>RMS</sub></td> </tr> <tr> <td> Receiver (RCVR)</td> <td>Receive signal level or coincidence detector output</td> </tr> <tr valign="top"> <td><strong>Charging LED:</strong></td> <td>Illuminated during battery full charging, flashes during battery trickle charge, extinguished when battery not charging <br> </td> </tr> <tr valign="top"> <td><strong>Power:</strong></td> <td>Battery Operation - Two 6V/7.2 Amp-Hour VRLA Batteries<br> Operating Time (Full Charge) - 2.5 hours nominal at 68� F<br> Recharge Time - 6 hours nominal<br> AC Operation - Standard: 120/240 VAC, 50/60 Hz, 35 Watts<br> <div style="text-align: justify;"> Optional: 100/200 VAC, 50/60 Hz, 35 Watts</div> </td> </tr> <tr valign="top"> <td><strong>Temperature:</strong></td> <td>Operating: 0� C to +40� C<br> Storage: -10� C to +60� C</td> </tr> <tr valign="top"> <td><strong>Size:</strong></td> <td>13.5" W (343 mm) x 8" D (203 mm) x 11.25" H (286 mm)<br> excluding carrying handle</td> </tr> <tr valign="top"> <td><strong>Weight:</strong></td> <td> 24 pounds (10.9 kg) with batteries</td> </tr> <tr valign="top"> <td><strong>Order Numbers:</strong></td> <td nowrap="nowrap">RG-4B Receiver/Generator 120 VAC with Batteries: 915-0024-001<br> RG-4B Receiver/Generator 240 VAC with Batteries: 915-0024-002<br> RG-4B Receiver/Generator 120 VAC without Batteries: 915-0024-003<br> RG-4B Receiver/Generator 240 VAC without Batteries: 915-0024-004<br> RG-4B Receiver/Generator 100 VAC with Batteries: 915-0024-005<br> RG-4B Receiver/Generator 200 VAC with Batteries: 915-0024-006<br> RG-4B Receiver/Generator 100 VAC without Batteries: 915-0024-007<br> RG-4B Receiver/Generator 200 VAC without Batteries: 915-0024-008<br> <br> RG-4B Receiver/Generator Optional Transport Case: 746-0007<br> </td> </tr> </tbody> </table> <hr> For additional information on any of our products, please contact <a href="mailto:[email protected]">Sales</a> to discuss your particular requirements:<br> <center> <table cellpadding="20"> <tbody> <tr valign="top"> <td><strong>Delta Electronics, Inc.<br> 5730 General Washington Drive<br> P. O. Box 11268<br> Alexandria, VA 22312</strong></td> <td><strong>Phone: (703) 354-3350<br> U.S. Toll Free: 1-800-8-DELTA-8 (1-800-833-5828)<br> Fax: (703) 354-0216<br> <address>www.deltaelectronics.com</address> Email: <a href="mailto:[email protected]">[email protected]</a></strong></td> </tr> </tbody> </table> </center> <hr> <center> <table bgcolor="White" border="2" cellpadding="10"> <tbody> <tr> <td><strong><a href="../index.html">HOME</a></strong></td> <td><strong><a href="../amprod.htm">AM/FM/TV Products</a></strong></td> <td><strong><a href="../hfprod.htm">HF/VHF/UHF Products</a></strong></td> </tr> </tbody> </table> <font size="1">The Delta Electronics logo is a registered trademark of Delta Electronics, Inc.</font></center> <img src="http://cgibin.erols.com/cgi-bin/Count.cgi?df=deltarg4.cnt&ft=0&tr=Y&dd=B&md=5&sh=F" align="middle"> </body></html>