Ramsey Electronics COM 3 - Operation Procedures; Front Panel Control Layout

3.1 INTRODUCTION
Use of the Com 3 is as straight forward as the
front panel layout, you can begin using the Com
3 without even reading this manual. We suggest
you do read it though, to take advantage of all
the features available.
3.2 FRONT PANEL DESCRIPTION
The Com 3's front panel is a flat, fully sealed
membrane switch designed for years of reliable
service. All numeric data is entered through the
keypad located on the right front side. An
audible tone will sound when a key is
depressed to indicate positive contact.
Note, related keys that control the various
functions of the Com 3 are logically grouped ㆍ
together. Refer to figure 3.1 and the following
section for an explanation of each control and its
function.
SECTION 3
OPERATION
(1) POWER: applies AC power when the Com
3 is plugged into 8 standard 117 VAC outlet, or
supplies 12 VDC from the internal battery in areas
where there is no 117 VAC source available.
(2) LOW BAT: indicator lights when the internal
battery needs recharging.
(3) VOLUME: controls the audio level of the
~ internal speaker.
(4) DISPLAY: A 0.4" 7 segment LED display
shows the generate or receive frequency, AF
frequency, or RF count frequency depending on
mode selected.
Note; that the display is calibrated in KHz for the
Count AF mode and in MHz for all other modes.
(5) GENERATE RF: selects the GENERATE
RF mode. The display will indicate the frequency
being generated.