674732
51
Zoom out
Zoom in
Previous page
1/102
Next page
Page 49FT-450D OPERATION MANUAL
CW SPOTTING
(
ZERO-BEATING
)
“Spotting” (zeroing in on another CW station) is a handy technique for ensuring that you and the other station are
precisely on the same frequency.
CW MODE OPERATION
TO USE CW SPOTTING:
In CW mode, while pressing and holding the
[
IPO/ATT
]
button, the Spot tone will be heard and Spot
tone frequency will show in the display. This tone cor-
responds to the pitch of your transmitted signal, and
if you adjust the receiver frequency to match the pitch
of the received CW signal to that of the Spot tone,
your transmitted signal will be precisely matched to
that of the other station.
Release the
[
IPO/ATT
]
button to turn the Spot tone off.
USING CW REVERSE
If you experience a difficult interference situation, where an interfering station cannot readily be eliminated, you
may wish to try receiving using the opposite sideband. This may throw the interfering station’s frequency in a
direction that may lend itself more readily to rejection.
1. To start, let’s use a typical example where you
have set the CW mode (using the default “USB”
injection: the “ ” and “ ” icon appear).
2. Press and hold in the
[
MODE
]
or
[
MODE
]
button for one second. The “ ” icon appears
instead of “ ”, indicating that the “LSB” injec-
tion side has now been selected.
3. Press and hold in the
[
MODE
]
or
[
MODE
]
button, once again, for one second to return to
the normal (USB) injection side and cancel CW
Reverse operation (the “ ” and “ ” icons
appear).
[
IPO/ATT
]
button
In the illustration, Figure A demonstrates the
normal CW injection setup, using the USB
side. In Figure B, CW Reverse has been en-
gaged, so as to receive using LSB-side in-
jection to eliminate interference.
The beneficial effect of switching sidebands
can clearly be seen in this example.
RX Passband
RX Passband
Carrier
Carrier
QRM
QRM
Normal CW
( )
CW Reverse
( )
USB
LSB
A
B
[
MODE
]
/
[
MODE
]
button
51


Need help? Post your question in this forum.

Forumrules


Report abuse

Libble takes abuse of its services very seriously. We're committed to dealing with such abuse according to the laws in your country of residence. When you submit a report, we'll investigate it and take the appropriate action. We'll get back to you only if we require additional details or have more information to share.

Product:

For example, Anti-Semitic content, racist content, or material that could result in a violent physical act.

For example, a credit card number, a personal identification number, or an unlisted home address. Note that email addresses and full names are not considered private information.

Forumrules

To achieve meaningful questions, we apply the following rules:

Register

Register getting emails for Yaesu FT-450D at:


You will receive an email to register for one or both of the options.


Get your user manual by e-mail

Enter your email address to receive the manual of Yaesu FT-450D in the language / languages: English as an attachment in your email.

The manual is 7,16 mb in size.

 

You will receive the manual in your email within minutes. If you have not received an email, then probably have entered the wrong email address or your mailbox is too full. In addition, it may be that your ISP may have a maximum size for emails to receive.

The manual is sent by email. Check your email

If you have not received an email with the manual within fifteen minutes, it may be that you have a entered a wrong email address or that your ISP has set a maximum size to receive email that is smaller than the size of the manual.

The email address you have provided is not correct.

Please check the email address and correct it.

Your question is posted on this page

Would you like to receive an email when new answers and questions are posted? Please enter your email address.



Info