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CHAPTER 4
DETAILED OPERATING INSTRUCTIONS
4-1 INTRODUCTION: This portion of the manual describes how to operate the RX-
340 using front-panel controls and displays. It begins with an overview of panel layout,
followed by in-depth instructions for using each function and control feature. Detailed
front and rear panel illustrations are provided in Figures 1-1 and 1-2. Please refer to
these figures, as needed, to supplement written instructions.
4-2 FRONT PANEL OVERVIEW: The RX-340 panel is ergonomically arranged for
convenient operation, with most controls positioned within the four shaded control
groups highlighted below:
1. Audio Group: The panel's Audio group (1) provides separate headphone and speaker
volume controls, plus a channel selector which is used when using selectable sideband
sync AM or monitoring ISB signals. A standard 1/4" stereo front-panel headphone jack
is mounted directly below the headphone volume control.
2. Auxiliary Parameters Group: The controls in the Auxiliary Parameters group (2)
are used to program receiver operating characteristics such as bandwidth, AGC response,
BFO offset, etc. The status of each operating parameter appears in a two-line
alphanumeric display window positioned in the center of the block. Push-button switches
select individual function for programming. Programming is accomplished using the
group's dedicated edit-control knob and main keypad (4).
3. Memory/Scan Group: The controls in the Memory/Scan group (3) are used to store
or recall memory channels and to setup specific scan operations. Push-button switches
select individual functions, and a dedicated edit-control knob plus the main keypad (4)
are used to perform data-entry and menu- search functions. Status information appears in
the group's two-line alphanumeric display window.
4. Tuning/Keypad Group: The controls in the Tuning/keypad block (4) are used to set
receiver operating frequency. In addition, the keypad is used to enter numeric data for
some auxiliary parameters and scan setups. The receiver's main alphanumeric display,
located directly above the tuning-control block, provides a continuous presentation of
operating mode, tuning step, and operating frequency. It also displays selected keypad
entries and status messages.
4-1
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