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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.
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.
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.
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.
Frequency Range: | 100 kHz to 29.999 MHz in 1 kHz steps |
Generator/Receiver Isolation: | Greater than 120 dB |
Generator: | |
Output: | 100 kHz to 20 MHz, Adjustable to 10 VRMS
(2W) into 50 ohms 20 MHz to 27.5 MHz, Adjustable to 5 VRMS (0.5W) into 50 ohms 27.5 MHz to 29.999 MHz, Adjustable to 4 VRMS (0.3W) into 50 ohms |
Modulation: | 400 Hz 90% AM, 50 Hz square wave |
Output Connector: | BNC Female |
Receiver: | |
Type: | Dual Conversion Superheterodyne with AGC |
Sensitivity: | 5 µV Nominal |
Selectivity: | -3 dB Bandwidth: 3.8 kHz -45 dB Bandwidth: 18 kHz |
BFO: | On/Off, 455 kHz ±3 kHz |
Audio Output: | Internal speaker or headphone connected to front panel phone jack |
Input Connector: | BNC Female |
Metering: | |
Battery (BAT) | Battery or power supply voltage |
Generator (GEN) | Generator output in VRMS |
Receiver (RCVR) | Receive signal level or coincidence detector output |
Charging LED: | Illuminated during battery full charging, flashes
during battery trickle charge, extinguished when battery not
charging |
Power: | Battery Operation - Two 6V/7.2 Amp-Hour VRLA Batteries Operating Time (Full Charge) - 2.5 hours nominal at 68° F Recharge Time - 6 hours nominal AC Operation - Standard: 120/240 VAC, 50/60 Hz, 35 Watts
Optional: 100/200 VAC, 50/60 Hz, 35 Watts
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Temperature: | Operating: 0° C to +40° C Storage: -10° C to +60° C |
Size: | 13.5" W (343 mm) x 8" D (203 mm) x 11.25" H (286 mm) excluding carrying handle |
Weight: | 24 pounds (10.9 kg) with batteries |
Order Numbers: | RG-4B Receiver/Generator 120 VAC
with Batteries: 915-0024-001 RG-4B Receiver/Generator 240 VAC with Batteries: 915-0024-002 RG-4B Receiver/Generator 120 VAC without Batteries: 915-0024-003 RG-4B Receiver/Generator 240 VAC without Batteries: 915-0024-004 RG-4B Receiver/Generator 100 VAC with Batteries: 915-0024-005 RG-4B Receiver/Generator 200 VAC with Batteries: 915-0024-006 RG-4B Receiver/Generator 100 VAC without Batteries: 915-0024-007 RG-4B Receiver/Generator 200 VAC without Batteries: 915-0024-008 RG-4B Receiver/Generator Optional Transport Case: 746-0007 |
Delta Electronics, Inc. 5730 General Washington Drive P. O. Box 11268 Alexandria, VA 22312 |
Phone: (703) 354-3350 U.S. Toll Free: 1-800-8-DELTA-8 (1-800-833-5828) Fax: (703) 354-0216 www.deltaelectronics.com Email: sales@deltaelectronics.com |
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