Browse Prior Art Database

Non-Interfering RF Level Monitor/Indicator

IP.com Disclosure Number: IPCOM000101348D
Original Publication Date: 1990-Aug-01
Included in the Prior Art Database: 2005-Mar-16
Document File: 3 page(s) / 98K

Publishing Venue

IBM

Related People

Roberts, WJ: AUTHOR

Abstract

Disclosed is an RF amplitude monitor/indicator. Because it is large in size, uses LED indicators, and uses only DC analog voltages, it provides a visible, non-interfering RF magnitude display during EMI (Electro-magnetic Interference) testing of RF emissions. This facilitates communication between EUT (Equipment Under Test) and the normally remote RF receiver and test instrumentation. The present embodiment is attached to a known ESVP RF receiver (Rhode and Schwarz) utilizing an output which is proportional to its front-panel emission- strength indicator.

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Non-Interfering RF Level Monitor/Indicator

       Disclosed is an RF amplitude monitor/indicator.  Because
it is large in size,  uses LED indicators, and uses only DC analog
voltages, it provides a visible, non-interfering RF magnitude display
during  EMI (Electro-magnetic Interference) testing of RF emissions.
This facilitates communication between EUT (Equipment Under Test) and
the normally remote RF receiver and test instrumentation.  The
present embodiment is attached to a known ESVP RF receiver (Rhode and
Schwarz) utilizing an output which is proportional to its front-panel
emission- strength indicator.

      Figs. 1 and 2 show front and back views of the present
embodiment.  It consists of a wood cabinet 1 with clear polycarbonate
face panel 2 and pressboard back panel 3 attached with screws 4.  The
face panel has a black paper underlay providing enhanced
contrast/visibility for twenty LEDs 5.  These are recessed into the
face panel, stra tegically spaced and color coded as shown for quick
interpretation of indicated RF emission strength.  The LEDs are
numbered from bottom to top, and are wired to circuit card 6.  Switch
7 controls DOT/BAR functions of the LEDs. A/B switch 8 is used for
scale and sensitivity resolution. Power is supplied through female
Mono Jack 9. Female BNC connector 10 receives input from the RF
receiver.

      Fig. 3 is a schematic circuit diagram of the present
embodiment.  It is seen that it consists of two integrated IC chips 6...