MFJ MFJ-784B, Инструкция по эксплуатации, Страница: 33 / 74

MFJ-784B Instruction Manual
Operation Error! Main Document Only. -7
The function of this LED is very simple. When you are listening to a normal
signal, the LED should light the most steady and brightest green possible
without ever going red. If the LED doesn't light consistently green or lights red
on normal signals, the receiver volume or the DSP's
Receive Audio Adjust is
out of adjustment for the optimum filter performance. Initially set Receive
Audio Adjust (refer to page 2-4) and then "touch-up" the receiver's volume
control to keep the input level at the optimum setting.
AGC Button
This button controls an automatic gain control (AGC) program. The AGC
program automatically adjusts the DSP's internal gain. It tries to make all
signals have exactly the same volume. The AGC button setting cannot be
stored in memory. It operates independently of all other buttons and controls
except the
DSP and the Power buttons.
The AGC is activated by pushing and locking this button "in." If the DSP is on
and operating, pushing the
AGC button "in" will make every signal have nearly
the same volume level, if the input signal level changes less than 18 dB.
If there is a lot of noise on the signal, you may not want to use the AGC
function. It will increase the volume of the noise during long pauses in the
signal you are listening to. That can distract you or make it difficult to
concentrate on the signal you are listening to.
Program Button
This button is used to make the DSP memorize the filter settings you are
currently using. When using the tunable CW filter, this button activates the
CW spotting tone. It also starts a "Talk" feature if the
DSP button is "out." This
button does not stay locked-in like the other buttons, it springs right back out
when released.
The use of this button is very special. To use this button to memorize or save
a filter, please read the section on page 4-2. To use this button to activate the
spotting tone, please read the section on page 4-4. To use this button to start
the Talk feature, please read the section on page 4-5.