Using The Frequency Meters; Khz Fm Deviation Meter; Digital Fm Deviation Meter; Percent Am Bargraph Meter - Ramsey Electronics COM3010 User Manual

2.10 Using the Frequency Meters

RECEIVE
Counter
Any of these meters may be zoomed for a larger display for easy viewing. To zoom a display,
press SHIFT, . Function keys.
Example:
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FM Mode: Meter Displayed
+/- 6 kHz FM Deviation
Do not reproduce or distribute.
Bargraph Meter
+/- 4 kHz FM Deviation
Bargraph Meter
Digital
FM Deviation Meter
FM Mode: Meter Displayed
Percent of AM
Bargraph Meter
Digital Percent of AM
Meter
The frequency meters are selected by pressing
Level Meters
METER SELECT
ters unique to both RECEIVE AM and RECEIVE
FM modes.
Freq Meters
To select meter mode
To zoom a display for easy viewing
COM3010 Meter Displays
2.10.01 This meter displays the instantaneous modulation
packet showing the minimum and maximum level. It displays
a maximum of +/- 6 kHz deviation whether or not the
received signal is on frequency. Each division represents
1kHz; this display is showing +3 kHz/-4.2 kHz.
2.10.02 This reduces the scale to +/- 4 kHz. This allows more
resolution for detecting smaller signals without having to
zoom.
2.10.03 This meter is a numeric version of the above meters.
2.10.04 Displays a quickly updated percent of AM calibrated
demodulation. Every tick indicates 10%. This meter indicates
50% modulation, and the slow peak-hold point (larger
square) indicates a peak of 65% modulation.
2.10.05 Displays percent of demodulated AM. Accuracy is +/-
5%, but better than +/-1% using 1kHz tones.
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BASIC OPERATION
multiple times. There are me-
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