Headphone Adjustments - Yaesu FT-1000MP Operating Manual

Operation
The Main and Sub VFO share the same an-
tenna and front-end bandpass filter, and so
should be tuned fairly close to each other for
maximum sensitivity (that is, within 500 kHz or so
at low frequencies, or within several MHz at
higher frequencies). Although you may be able to
receive on, say, 21 and 28 MHz at the same time,
you may find the SUB VFO-B receiver signal
attenuated.
There are 12 BPF networks in the receiver
front-end circuitry, each covering a particular seg-
ment of the transciever's full receive range. SUB
VFO-B receiver specifications are only guaran-
teed while tuning within the same bandpass as
the MAIN VFO-A.
Main and Sub VFO Audio
The AF GAIN control has concentric controls
for both MAIN and SUB VFO volume. The effect
these controls have on receiver audio can be
changed, and is configured using menu selection
4-9. AF GAIN control knob operation can be set to
either of the two following modes:
Separate - the receiver volume for the MAIN
and SUB VFOs is adjusted independently. This
simply means that the center (MAIN) knob con-
trols SUB VFO-A volume and the outer ring con-
trols SUB VFO-B.
Balance - the center knob adjusts the volume
for both the MAIN and SUB VFO simultaneously.
The outer ring now functions as a "balance" con-
trol between main and sub audio.
Note - to "reverse" Main and Sub receiver
audio at any time, press the AF REV button just
to the left of the UP/DWN keys so its LED lights.
The functions of the center and outer AF GAIN
controls are now switched. Press the button
again to return operation to normal.
Remember that when the SUB VFO Bis turned
off by pressing again, the AF GAIN control
configurations no longer apply.
page 44
Using Headphones for Dual Receive
To take advantage of dual reception, you will
want to connect stereo headphones to the
PHONES jack. Like the AF GAIN control, headphone
audio mixing can also be configured as desired
from menu selection 4-8. Three audio mixing
schemes are selectable as follows:
Mono - audio from both the main and sub
receiver is combined equally in both ears (as from
the loudspeaker when headphones are not used).
Stereo 1 - this is a combination of the above
two modes and gives you some audio from each
channel in each ear, but with the main receiver
emphasized in the left ear, and the sub receiver
emphasized in the right ear, resulting in a kind of
"3-D" spatial audio effect.
Stereo 2 - audio from the main receiver is only
heard in the left ear, and audio from the sub
receiver is heard only in the right ear.
Note that both the MAIN and SUB VFOs must
be activated by pressing and the AF GAIN
control must be balanced (centered) to hear both
receivers. Compare these two positions with both
VFOs tuned to signals, to select the audio mixing
scheme you prefer.
Headphone Audio Adjustments
Vane aban
l p i a eile
'[HPA-M] [HPA-S] |[HPB-M| |HPB-S
Factory-Set | MAIN RX SUB RX | MAINRX SUB RX
DONOT 'LEVELADJ, LEVELADJ. | LEVEL ADJ. LEVEL ADJ.
VR6801
VR6804
__YR6
ADJUST!!