Operation
CW Operation
The BLA350 Plus utilises conventional relays for RX / TX switching and so due to the finite
switching time, (20ms), ‘CW Full Break-In’ may not be used. It is recommended that the PTT
cable from the transceiver is connected to the amplifier and that the ‘CW delay’ on the trans-
ceiver is adjusted accordingly so that when the key is pressed there is a predetermined delay to
allow the BLA350 Plus RTX relay to switch from RX to TX before RF appears on the input.
Initial settings
If required it is necessary to tune the antenna before utilising the amplifier. This may be carried
out with the BLA350 plus either switched off, (Switch
a
), or in ‘Standby’ mode, (Standby dis-
played on the LCD display) (
[
).
The output power of the transceiver should be adjusted to a suitable level 10W or the ALC
connection made between the transceiver and BLA350 Plus and adjusted accordingly. See
ALC menu. Set the front panel controls in the following positions:
MAIN ON/OFF
OFF
Stby / ON
OFF
LPF Selector
Any position
AUTO / MAN
AUTO
Standby
Switch the power switch MAIN, (
a
), to ON. The LCD display, (
[
), and Output Power meter
(
b
) backlight will illuminate. In this mode the BLA350 Plus is in Standby mode and will not
switch to TX (Amplify the incoming signal from the Transceiver), if the transceivers PTT is
pressed.
The LCD Display shows:
The first row indicates the state of the amplifier, (Standby), and the status of the Low Pass Fil-
ter selection, either Auto or Manual. The second row shows the current temperature of the am-
plifiers heat sink close to the RF Transistors, and the currently selected filter. If the switch
AUT / MAN, (
_
), is set to MAN then it is possible to change the filter selection manually us-
ing the band selector switch (
`
).
MENUS
When the amplifier is in Standby mode, it is possible to access the BLA350 plus settings
menu. Press briefly the OK (
]
) switch. It is now possible to access all of the menus by repeat-
edly pressing OK until the desired menu item is located.
To enter a specific menu press briefly the SET (
^
) switch. To exit a menu item without saving
any changes press the Stby / ON (
\
) switch to ON and then if required back to Stby. Or press
the OK, (
]
), switch repeatedly unit the ESC menu is displayed and then press SET. To change
any parameters press the SET (
^
) switch. To save any modification to the menu parameters
press OK, (
]
), immediately after a modification is made. An asterisk ’*’ is displayed on the
LCD display to indicate the currently active parameter.
S t a n d b y A u t o
T
: 2 8
° C B
: 1 0
-
1 2
m
6
Содержание BLA350 PLUS
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