Browse Prior Art Database

Electromagnetic Recorder

IP.com Disclosure Number: IPCOM000109707D
Original Publication Date: 1992-Sep-01
Included in the Prior Art Database: 2005-Mar-24
Document File: 4 page(s) / 116K

Publishing Venue

IBM

Related People

Wolak, MP: AUTHOR

Abstract

A program is disclosed that allows the user to monitor, over a period of time, the changes in the frequency spectrum as measured by the HP 859X Portable Spectrum Analyzer. EMREC (ElectroMagnetic RECorder) does this by initializing the analyzers at startup and then putting them in "MAX HOLD" mode. This mode captures the maximum amplitudes of the signals in the frequency band being monitored during the time the analyzer is in this mode. After a number of minutes, which the user defines, EMREC records the trace information, clears the MAX HOLD, and then resets the MAX HOLD for the next time interval. EMREC will capture trace information in this manner until the users exit the program.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 52% of the total text.

Electromagnetic Recorder

       A program is disclosed that allows the user to monitor,
over a period of time, the changes in the frequency spectrum as
measured by the HP 859X Portable Spectrum Analyzer.  EMREC
(ElectroMagnetic RECorder) does this by initializing the analyzers at
startup and then putting them in "MAX HOLD" mode.  This mode captures
the maximum amplitudes of the signals in the frequency band being
monitored during the time the analyzer is in this mode.  After a
number of minutes, which the user defines, EMREC records the trace
information, clears the MAX HOLD, and then resets the MAX HOLD for
the next time interval.  EMREC will capture trace information in this
manner until the users exit the program.

      EMREC is a program written with Borland Turbo C, and it is
approximately 830 lines of code contained in the main body of the
program and 10 user-defined functions.  Refer to Fig. 1 for a general
flow diagram of the program.

      EMREC can be operated in one of two modes.  In Recorder mode,
EMREC records trace information as outlined above.  This operation is
transparent to the user after initialization.  After EMREC has taken
information, the user can, at any time, view the data.  In Display
mode, EMREC just displays data which has been previously taken with
EMREC in Recorder mode.

      EMREC also records the "MAX TRACE" of a series of traces
recorded with EMREC.  This trace is maintained by the system and
records only the maximum amplitudes measured during the measurement
period.  This allows the user t...