VHF/UHF Handheld Signal Location Antennas
Type NVF-2

 



Thumbnail Picture - Click to Enlarge

 

The Type NVF-2 series of handheld directional antennas are used to locate interfering signals or noise in either the 420 470 MHz (Type NVF-2A) or the 900 MHz ISM band or cellular telephone bands (Type NVF-2B). Both models incorporate a solid reflector positioned behind a resonated half wave driven element, both elements being mounted on a fiberglass rod with an integral pistol grip. The configuration of the reflector and driven element are such that a deep null in the signal being received will occur when the antenna is pointed in the direction of the signal being radiated. A T-pad resistive attenuator is also incorporated in the antenna mounting enclosure to aid in the direction finding process on very strong signals or when excessive reflections present multiple returns.

For this antenna to be effective, it should be used with a spectrum analyzer, service receiver, or any receiver that incorporates a signal strength display indicator, such as the conventional S-meter. Although highly effective for locating interfering signals, the antenna is subject to multi-path transmission phenomenon (i.e. reflections), repeated observation of the incoming radio signal will be necessary from different locations in order to sort out the true direction of the incoming signal from the reflected signals.

 

TECHNICAL SPECIFICATIONS
TYPE NVF-2A

Frequency of Operation:

Useful Receive Bandwidth:

Overall Length:

Output Impedance:

Attenuation:

Null Depth:

Customer Specified in the 420470 MHz Spectrum

Approx. plus/minus 12 MHz about center frequency

15 Inches (Back of reflector to Connector)

50 Ohms

25 dB T-Pad, switched in or out

Typically 15-20 dB min. null depth



TYPE NVF-2B

Frequency of Operation:

Useful Receive Bandwidth:

Overall Length:

Output Impedance:

Attenuation:

Null Depth:

Customer Specified in the 860960 MHz Spectrum

Approx. plus/minus 20 MHz about center frequency

12 Inches (Back of reflector to Connector)

50 Ohms

25 dB T-Pad, switched in or out

Typically 15 20 dB min. null depth

 


NVF-2A/B Price: $139.95

(CA residents add 7 ¾% sales tax)

Shipping/Handling: $7.00


Overseas Customers: Please note that an additional overseas shipping charge will be applied to your order. National RF will notify you of the exact amount of shipping to your country via e-mail, after your e-order is placed. The customer is responsible for all and any customs or tarrif charges applied to your order.



 
Home - Products - Order Form - Contact Us