Scope - Yaesu FT-891 Operating Manual

Scope

The SCOPE function provides a spectrum display of the band conditions. Both strong
and weak signals can be clearly displayed on the LCD display. In the "Manual mode",
the scope frequency spectrum is scanned one time and displayed. In the "Continuous
Sweeping mode", the scope spectrum is repeatedly swept and displayed. The scope
sweep and span may be optimized according to your preferences and purposes.
NOTE: Since the FT-891 has only one receiver the audio will be muted during the
Continuous sweeping mode.
1. Press the assigned
play the band conditions ( spectrum ) .
r If the SCOPE function is not assigned to
[ A ] , [ B ] or [ C ] key, follow the instruc-
an
tion below.
Press the
"FUNCTION-2" list screen. à Rotate the
MULTI function knob to select "SCP"
à Press and hold any of the
[ C ] keys to assign this function.
r Rotate the
screen, and then press the knob, to switch the SCOPE function ON/OFF. The band
conditions ( spectrum ) will appear. Press and hold the
operation.
2. Press, or press and hold the
Continuous sweep mode.
Manual mode ( default )
Each time the
is shown on the LCD display, and then the receiver audio returns to the speaker.
Continuous sweeping mode
Press and hold the
the spectrum scope is scanned continuously. Press
scanning.
r While the Spectrum Scope is activated, press the
displayed bandwidth. Available selections are 750 kHz ( default ) , 375 kHz, 150 kHz, 75
kHz, or 37.5 kHz ranges.
r While the Spectrum Scope is activated, press the
the reference level.
r The sweeping interval may be set in Menu mode "13-01 [ SCP START CYCLE ] ".
r Width of scope display may be set in Menu mode "13-02 [ SCP SPAN FREQ ] ".
3. Press one of the
normal operation.
36
[ B ]( SCP ) key to dis-
[ F ] key repeatedly to find the
MULTI function knob to select "SCP" in the "FUNCTION-2" list
[ B ] （SCP） key, to sweep in the Manual mode or the
[ B ]( SWP ) key is pressed, a new scan of the spectrum scope
[ B ]( SWP ) key for one second. The audio is muted and
[ F ] / [ CLAR ] /
[ A ] / [ B ] /
[ C ]( LV1/LV2/LV3 ) key to change
[ MuV ] / [ VuM ] /
[ F ] key to return to normal
[ B ]( SWP ) key to stop the
[ A ]( SPN ) key to change the
[ V/M ] keys to return to
FT-891 Operating Manual