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Remote With Local Lockout function has been activated over the RS-232 interface. When
this security feature is turned on, the Remote switch or power cycling cannot be used to
restore local operation. Only a radio reset will exit this mode.
4-12 ISB SPEACER SOURCE button: The ISB speaker-source button functions in
ISB and SAM modes, and is used to step through a circular menu containing three audio-
source selections: LSB, BOTH, and USB. Three LED indicators display the selected
choice (see below):
In ISB or SAM mode, either sideband - or BOTH - may be selected. In all other modes,
the BOTH LED remains illuminated to indicate normal operation.
Exceptions: When the Mute function is activated over the Remote RS-232 bus, all three
LEDs extinguish and the status message 'MUTE' appears in the Mode area of the main
display. Also, sideband selection doesn't occur when the synchronous detector is in an
unlocked condition in SAM mode.
4-13 SPEAKER knob: The Speaker potentiometer is used to adjust volume level for
the internal or external speaker. An external speaker may be plugged into J7 on the rear
panel, disabling the internal speaker.
4-14 PHONES knob: The Phones potentiometer adjusts volume level to the front-panel
Phones jack. This jack accepts a standard 1/4" stereo or monaural phone plug.
4-15 AUXILIARY PARAMETER Overview: Controls in the Auxiliary Parameter
group are used for setting up and controlling various receiver operating characteristics.
These include:
A. Receiver IF bandwidth
B. BFO-Offset Frequency
C. Passband Tuning
D. AGC Parameters
E. Notch-filter Frequency
F. Squelch Sensitivity
G. Noise Blanker Pulse Width
H. Optional Features
A dedicated two-line alphanumeric display shows the operating status of each auxiliary
function, and the group's Edit Knob controls various menu selections and control setting.
4-5
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