Section II. Equipment Description
FM/AM Modulation Meter M E-525AIUSM provides automatic (AUTO) tuning, leveling, and modulation display of AM
and FM signals. Manual tuning and leveling is also possible using an external (EXT) signal using front panel controls and
controls of the external signal source.
Automatic and Manual Operation
. The highest amplitude radio frequency(rf) carrier
in the frequency range
megahertz (MHz) to 1.2 gigahertz (GHz) is automatically tuned (or manually acquired by adjustment of equipment
used for external input) and normalized in level to produce a 1.0 MHz intermediate frequency (if.) signal identical to
the input rf carrier (AM or FM modulated). The modulating signal is detected, filtered, measured and then displayed
on the digital display in percent of AM modulation or kilohertz of FM deviation.
Detectors. Pushbutton switches select displays
or negative peak modulation
or peak average, each
three ranges for FM and AM.
. Four high and four low pass filters and four de-emphasis networks provide the means for bandpass
relates phase deviation to the frequency deviation displayed.
Weight and Dimensions
14 lbs. (63.5 kg)
15.72 in. (399.3 mm)
13.68 in. (347.5 mm)
6.36 in. (111.5 mm)