478499

Yaesu FT-857D Manual

70
Zoom out
Zoom in
Previous page
1/132
Next page
68 FT-857D Operating Manual
A
CTIVE
-T
UNING
A
NTENNA
S
YSTEM
(
ATAS-100/-120
)
O
PERATION
The optional ATAS-100/-120 Active-Tuning Antenna System provides operation on a num-
ber of HF bands (7/14/21/28 MHz) plus 50 MHz, 144 MHz, and 430 MHz. The FT-857D
provides microprocessor control of the tuning mechanism in the ATAS-100/-120 for con-
venient automatic tuning.
Before operation can begin, you must instruct theFT-857’s microprocessor that the ATAS-
100/-120 is being used. This is done using the Menu Mode:
1. Press and hold in the
[
FUNC
]
key for one second to activate the Menu mode.
2. Rotate the SELECT knob to recall Menu Mode No-001
[
EXT MENU
]
, then rotate the
DIAL to change the setting to “ON” to enable the extended Menu Mode.
3. Rotate the SELECT knob to recall Menu Mode N0-085
[
TUNER/ATAS
]
. The default
setting for this Menu is “OFF.” Rotate the DIAL to change the setting to “ATAS (ALL),”
if you are using the ATAS-100/-120 for all bands (you must connect an external diplexer
to combine the two antenna ports so as to use the ATAS-100/-120 on all bands). Or
make the setting “ATAS (HF&50),” if you are using the ATAS-100/-120 on 7 ~ 50
MHz, with a dual-band VHF/UHF antenna connected separately to the 144/430 MHz
antenna port. If you are just using the ATAS-100/-120 on the HF bands only, with a
dual-band VHF/UHF antenna connected separately to the 144/430 MHz antenna port
(no 50 MHz operation) make the setting “ATAS (HF).”
4. Press and hold in the
[
FUNC
]
key for one second to save the new setting and exit to
normal operation.
Automatic Tuning
1. Press the
[
FUNC
]
key, then rotate the SELECT knob as needed, to recall Multi Func-
tion Row “k”
[
TUNE, DOWN, UP
]
.
2. Press the
[
A
](
TUNE
)
key to turn the ATAS-100/-120 on (this action only supplies volt-
age to the antenna at this point; re-tuning does not begin). The “ATAS” will appear on
the LCD.
3. Now press and hold in the
[
A
](
TUNE
)
key for one second to initiate ATAS-100/-120
tuning. The transmitter will automatically be activated, a carrier will be sent, and the
antenna’s length will be adjusted for best SWR.
4. If the microprocessor determines that the antenna’s length is radically incorrect from
the optimum value, no carrier will be sent out. Instead, in the receive mode, the antenna
will retract to its longest or shortest position (this may take up to one minute). While this
is happening, do not press the
[
A
](
TUNE
)
key again.
When the ATAS-100/-120 reaches its minimum length, automatic tuning will be initi-
ated, and the transmitter will automatically shut off when a satisfactory SWR is achieved.
5. On the 144 MHz and 430 MHz bands, the ATAS-100/-120 does not require a tuning
process. SWR will be satisfactory when the antenna is fully retracted.
TRANSMITTER OPERATION
… 70 …


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-857D 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-857D in the language / languages: English as an attachment in your email.

The manual is 4,64 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