Operation Manual

72
5
FUNCTIONS FOR RECEIVE
5
■ 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; “ ” ap-
pears when the 12 dB attenuator is ON.
•Only one of these functions can be activated at a time.
momentarily
momentarily 1 sec.
[P.AMP/ATT]
“ ” or “ ” appears.
Scope set mode (Continued)
1
MMaaxx HHoolldd
This item turns the peak level holding function ON
and OFF.
OONN
Peak hold is turned ON.
(default)
OOFFFF
Peak hold is turned OFF.
2
SSccooppee SSiizzee
This item toggles the scope size setting between nor-
mal and wide.
NNoorrmmaall
Normal size is selected.
(default)
WWiiddee
Wide size is selected.
3
FFAASSTT SSwweeeepp
This item selects the sweep speed setting.
CCoonnttiinnuuoouuss
Push [F-4
SSPPDD
] momentar-
ily to toggle the sweep
speed Fast and Slow contin-
uously. (default)
11 SSwweeeepp
One Fast speed sweep oc-
curs each time [F-4
SSPPDD
] is
pushed momentarily.
4
FFAASSTT SSwweeeepp SSoouunndd
This item sets the monitoring sound level for fast
sweeping.
--1100ddBB
:
Monitoring sound is set 10 dB smaller than
normal sound. (default)
00ddBB
: Same as normal sound.
OOFFFF
: No sound comes out while fast sweeping.