674740
143
Zoom out
Zoom in
Previous page
1/154
Next page
Page 141FT-991 OperaTing Manual
installation of optional accessories
Active-tuning AntennA SySteM
(
AtAS-120A
)
operAtion
ATAS-120A
is a multi-band auto-tuning antenna that can be used in the amateur bands from the HF band to the UHF
band (7/14/21/28(29) /50/144/430)
Using the active tuning mechanism, tuning can be carried out automatically by the control signal from
FT-991
. Please
refer to the
ATAS-120A
Operating Manual for the assembly and installation of
ATAS-120A
.
Interconnections to FT-991
Connect “
ATAS-120A
” to the ANT terminal of
FT-991
with a coaxial cable as shown in the diagram below.
Advice:
r
Turn off the external power supply switch and the
FT-991
power supply switch rst before connecting
the cables.
r
Grounding is required for the
ATAS-120A
. Make
sure the antenna base is in contact with the car body
to ensure proper grounding.
note:
r
Do not plug or unplug the connector of the antenna
cable with wet hands. Do not plug or unplug the
connector during transmission as well. This may
result in electric shock, injury, etc.
r
The unit cannot be used with both the antenna tuner
and
ATAS-120A
connected.
ATAS-120A
Dedicated V/UHF band antenna
FT-991
Commercial
antenna
duplexer
Commercial
antenna base
FT-991
ATAS-120A
ATAS-120A connection example
When installing a dedicated VHF/UHF antenna si-
multaneously with the
ATAS-120A
, use a VHF/UHF
antenna that does not include the HF - 50 MHz bands
(144/430 MHz type).
The reception circuit of the V/UHF band may be im-
pacted by the transmitter energy from the
ATAS-120A
.
In addition, install the 2 antennas as far away from each
other as possible.
When using an antenna duplexer, the ANT terminal of
the
ATAS-120A
and the HF/50 MHz ANT terminal
of the
FT-991
must be connected in series and also
insulated from the grounding in order to supply the
control voltage for the
ATAS-120A
.
143


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-991 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-991 in the language / languages: English as an attachment in your email.

The manual is 30,58 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