Ramsey Electronics COM3010 User Manual page 9

INTRODUCTION
and tone generation of the COM3010 is desired. This input can be set to a wide range of sig-
nal levels as the built-in AGC will change the gain to get a very specific level before modulat-
ing the RF out. This input range should be kept between 50mV pk/pk to 5V pk/pk.
When you are using this feature, and the EXT modulation is switched on, there are three dif-
ferent AGC modes you should be aware of. These are indicated as an icon next to the MOD IN
level field on the left-hand display. If you press [SHIFT][MOD] it will cycle through the various
modes. See the GENERATE DISPLAY-External Modulation section for more information.
C. MONITOR Jack
The output of the MONITOR jack is the received modulation. This is typically a 1V pk/pk signal
and can be used to display on an oscilloscope or routed to other test equipment for further
analysis. For example, you can view or decode received audio or digital signals.
This output is approximately 250mV/1 kHz of deviation.
D. RF OUT Jack
Property of Ramsey Electronics, Inc.
The RF out jack provides the output of the signal generator portion of the COM3010. It is also
used as the power meter input. The power meter is located on the signal generator output to
allow for simple radio checks without moving the cable.
Internal to the COM3010 is a log power detector which checks the signal present at the RF
Do not reproduce or distribute.
out jack. With the unit powered down, the COM3010 will, by default, shunt any power trans-
mitted into the generator output jack to the dummy load on the back of the unit. This pre-
vents the COM3010 from being harmed by applying power to the RF out jack within the
power meter specifications even if the power fails or the battery runs out.
E. VOLUME
The volume control simply affects the speaker level. The COM3010 has 2 watts of audio
power which should be adequate for most environments.
F. SQUELCH
The squelch control determines when the signal from the receiver is allowed to be detected,
displayed, and fed to the speaker. This is usually set to a threshold using the RSSI bargraph
meter on the top of the right hand display. A small cursor indicates at what RSSI level the
squelch will open and allow audio through.
The squelch also blocks the audio to the modulation meters. To be able to measure the sig-
nals, the squelch must be open.
G. POWER Button
Use this button to turn the power of the COM3010 on and off.
H. GENERATE Function buttons
These buttons select fields to alter the generator functions.
I. RECEIVE Function buttons
These buttons select fields to alter the receiver functions.
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