Preamp And Attenuator - Icom IC-7000 Instruction Manual

Scope set mode (Continued)
1 M M a a x x H H o o l l d d
This item turns the peak level holding function ON
and OFF.
2 S S c c o o p p e e S S i i z z e e
This item toggles the scope size setting between nor-
mal and wide.
3 F F A A S S T T S S w w e e e e p p
This item selects the sweep speed setting.
4 F F A A S S T T S S w w e e e e p p S S o o u u n n d d
This item sets the monitoring sound level for fast
sweeping.

■ Preamp and attenuator

The preamp amplifies received signals in the receiver
input (front end) circuit to improve the S/N ratio and
sensitivity. Turn this function ON when receiving weak
signals.
The attenuator prevents a strong undesired signal
near the desired frequency or near your location,
such as from a broadcast station, from causing dis-
tortion or spurious signals.
Push [P.AMP/ATT] momentarily to turn the preamp
ON and OFF; push and hold for 1 sec. to turn the at-
tenuator ON.
• " " appears when the preamp is ON; "
pears when the 12 dB attenuator is ON.
• Only one of these functions can be activated at a time.
O O N N
Peak hold is turned ON.
(default)
N N o o r r m m a a l l
Normal size is selected.
(default)
C C o o n n t t i i n n u u o o u u s s
Push [F-4 S S P P D D ] momentar-
ily to toggle the sweep
speed Fast and Slow contin-
uously. (default)
- - 1 1 0 0 d d B B :
Monitoring sound is set 10 dB smaller than
normal sound. (default)
0 0 d d B B
: Same as normal sound.
O O F F F F
: No sound comes out while fast sweeping
[P.AMP/ATT]
" ap-
momentarily
FUNCTIONS FOR RECEIVE
O O F F F F
Peak hold is turned OFF.
W W i i d d e e
Wide size is selected.
1 1 S S w w e e e e p p
One Fast speed sweep oc-
curs each time [F-4 S S P P D D ] is
pushed momentarily.
" " or " " appears.
momentarily
1 sec.
5
5
.
72