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This active magnetic loop antenna is designed for reception of signals over the range of 50 kHz to 30 MHz. It
includes a very high dynamic range low-noise preamplifier that can be mounted to a pole or any flat surface. The
preamplifier is designed for minimum intermodulation distortion in the presence of very high level signals that would
normally overload most amplifiers. For proper operation the preamplifier needs to be powered as shown in the
diagram shown in Figure 1 with the supplied power inserter and power supply that duplexes DC power on the same
cable carrying the preamplifier's output. The antenna should be oriented in the proper direction to maximize reception
of the desired signals (see details below). For best performance, the amplifier should be installed near the antenna to
avoid amplifying low level local interference that may enter the coaxial cable leading from the loop antenna to the
preamplifier's input.
Cautions:
•
This is a receive-only antenna. Do not connect it to a transmitter as it will be damaged and void your
warranty
•
Do not inadvertently connect the 20 VDC output of the power inserter to your receiver's antenna input as
your receiver may be damaged.
•
See attached cautions and warnings relative to lightning protection and antenna installation near high
voltage power lines.
•
When operating with nearby transmitting antennas, follow the instructions below to avoid over-driving (or
damaging) your receiver's input or damaging the loop's low-noise amplifier.
Supplied Components
QTY
Description
1
Loop antenna
1
30 dB preamplifier
1
L-bracket
2
Saddle clamps
2
U-bolts
1
lot Mounting Screws and washers
1
Coaxial- Seal package
1
24 VAC wall mount transformer
1
3 ft F-male to F-male jumper cable
1
1 ft F-male to F-male water-proof jumper cable
1
PL-259 Adapter
1
20 VDC power inserter
1
Twin lead to F-female adapter
1
RCA- plug to RCA- plug cable and Y adapter
1
Grounding Lug
2
Nylon shoulder washers (.375 inch)
2
Nylon flat washers (.25 inch)
1
Instruction Manual
RF PRO-1B INSTALLATION INSTRUCTIONS
(see Figure 16)
1
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Summary of Contents for Pixel RF PRO-1B
- Page 1 RF PRO-1B INSTALLATION INSTRUCTIONS This active magnetic loop antenna is designed for reception of signals over the range of 50 kHz to 30 MHz. It includes a very high dynamic range low-noise preamplifier that can be mounted to a pole or any flat surface. The preamplifier is designed for minimum intermodulation distortion in the presence of very high level signals that would normally overload most amplifiers.
- Page 2 Figure 1. RF PRO-1B Active Loop Antenna Wiring Diagram Figure 1. RF PRO-1B Active Loop Antenna Wiring Diagram 1 Ft Jumper Cable Input 27 dB Preamplifier Model RF30A Output RG-6 Cable (sold separately) (Not Supplied CAUTION: Do not inadvertently connect 20 VDC CAUTION: Do not inadvertently connect 20 VDC output of Power Inserter to Radio’s antenna input.
-
Page 3: Positioning The Antenna
Positioning the Antenna This antenna has a directional ‘Figure Eight’ pattern with two deep 25- 30 dB nulls as shown in the diagram in Figure 1, so for maximum daytime low-angle ground wave reception of a desired signal it should be oriented so that the imaginary plane in which the loop rests should be vertical to the ground and should, if extended, pass through the general location of the signal’s transmitter. - Page 4 Figure 2. KEY Wiring for RF PRO-1B Loop Antenna Figure 2. KEY Wiring For RF PRO-1B Loop Antenna Typical Transceiver Typical Receiver Back of Elecraft K3 Back of Elecraft K3 To Loop Preamp To Loop Preamp RF PRO-1B Power Inserter...
- Page 5 Figure 3. KEY Wiring for RF PRO-1B Loop Antenna RF PRO-1B Amplifier Transceiver POWER INSERTER Y Adapter...
-
Page 6: Default Settings
Figure 4. Power Inserter DIP Switch Settings KEY INPUT Switch 1 Switch 2 20 VDC ANTENNA POWER Default Settings HIGH HIGH HIGH ≥ 1.2 VDC LOW ≤ 0.7 V DC DIP Switch DIP Switch Figure 4. Power Inserter DIP Switch Settings Figure 5. Simplified Relay Interface Schematic Figure 5. Simplified Relay Interface Schematic Figure 5. Simplified Relay Interface Schematic +20 VDC To Loop Preamp (+20 VDC) Output to Receiver +20 VDC +20 VDC SW 1... -
Page 7: Mounting The Amplifier
For best results the cable run from the indoor power inserter to the external amplifier should be quad shielded RG-6 cable with male F connectors on each end. This cable is available with high-quality compression fit water-proof F-connectors pre-attached that have internal O-rings to keep moisture out. Pixel part numbers: C-50 50 feet C-100... - Page 8 Figure 6. One foot RG-6 Jumper Cable with water-proof F-connectors. Connects Loop Antenna Output to Amplifier Input. Figure 6. One foot RG-6 Jumper cable with water- proof F-connectors. Connects Loop Antenna Output to Amplifier Input Page 8...
- Page 9 Figure 7. Loop Antenna Mounted on Rotor Figure 7. Loop Antenna Mounted on Rotator Loop Antenna 1 foot Jumper L-Bracket Preamplifier Service Loop Coax-Seal RG-6 Cable to Power Inserter Rotor (Not Supplied) (Not Supplied) Page 9...
- Page 10 Figure 8. Pole Mounting Details Lightning Grounding 1 Foot F-male to F-male L-Bracket jumper 27 dB Low Noise preamplifier mounted to L - Bracket Figure 8. Pole Mounting Details Page 10...
- Page 11 Figure 9. Pole Mounting Details (side view) U-Bolts and Saddle Clamps Nylon Shoulder Washer Nylon Washer Preamplifier Figure 9. Pole Mast for rotor Mounting Details mounting (side view) Page 11...
- Page 12 Figure 10. Antenna & Rotor Pole Mounting Details (side view)
- Page 13 Figure 11. Amplifier Mounting Details Figure 11. Amplifier Mounting Details Nylon shoulder washers used to electrically Nylon shoulder washers used to electrically isolate isolate preamplifier case from mounting pole preamplifer from mounting pole...
-
Page 14: Nylon Washer
Figure 12. Preamplifier Mounting Details Figure 12. Preamplifier Mounting Details Nylon Washer Nylon Washer Amplifier Amplifier... - Page 15 Figure 13. Preamplifier Mounting Details Figure 13. Preamplifier Mounting Details Lock washer and Nut Lock washer and nut...
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Page 16: Connection Diagram
Power Inserter The power inserter contains a highly filtered linear DC regulator with an internal self resetting fuse that provides protection from short circuits. It is designed for indoor use only. The wall mount transformer provides 24 VAC for the power supply. - Page 17 Figure 11. Grounding Lug Mounting Details Figure 14. Grounding Lug Mounting Details Grounding Lug for Lightning Grounding Lug for Lightning Protection Protection Page 17...
- Page 18 Figure 15. Power Inserter ANT Power Indicator (illuminates when the preamp is powered) Connect to Receiver Antenna Input Connect to preamp output Master Power on/off Connect to KEY output of Transceiver (Optional) Figure 15. Power Inserter Page 18...
- Page 19 Figure 16. Supplied Accessories...
- Page 20 IEEE (Institute of Electrical and Electronic Engineers) for his work. Originally developed for a classified US Air antennas for low- noise, interference-free radio reception over a wide frequency range. Pixel has coupled this antenna with a custom made low-noise amplifier developed for Pixel by Clifton Laboratories with very high intermodulation Force project involving the measurement of EMP (Electro Magnetic Pulse) from nuclear weapons, this design has distortion (IMD) specifications (OIP3 = +48 dBm, OIP2 >...
- Page 21 AM or FM Broadcast stations and their harmonics. The RF PRO-1B Loop has been specifically designed to reduce intermodulation products to a minimum.
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