RF Concepts LLC PA-77DF User Manual
Alpha 9500 Linear Amplifier User Manual
RF Concepts, LLC
Operating the Amplifier
Product Release 1
DOCNUMBER 9500
Document Issue 1.1
Page 5–2
February 2010
55
5
When powered on, the amplifier tunes to the last-used band segment using
memory values. You can select a different band segment manually or
apply low input power to select a new band segment.
memory values. You can select a different band segment manually or
apply low input power to select a new band segment.
After you have set up your user memories, during normal operation, you
need only select the desired tuning mode (Default, User 1, or User 2) and
band and band segment, or key the amplifier (10–20 watts) to select the
band and band segment, then increase input power to achieve full output.
You are now ready to operate. If you must manually tune or autotune,
something has probably changed in the antenna system and you may need
to reprogram a user memory. It is generally safest to program and operate
from user memories. If you have not saved to the user memories, they still
contain factory default values.
need only select the desired tuning mode (Default, User 1, or User 2) and
band and band segment, or key the amplifier (10–20 watts) to select the
band and band segment, then increase input power to achieve full output.
You are now ready to operate. If you must manually tune or autotune,
something has probably changed in the antenna system and you may need
to reprogram a user memory. It is generally safest to program and operate
from user memories. If you have not saved to the user memories, they still
contain factory default values.
Operational states
The Alpha 9500 can be in one of seven operational states, listed in
Table
5-1 Operational states
State
Description
Off
Plugged in but OFF.
To enter this state:
Plug the amplifier into the AC line supply.
In this state:
The front panel lights briefly illuminate, then turns off and the entire
front panel goes dark. (If the lights stay on, unplug the AC connector for a few
seconds and plug in again. the amplifier has an internal auxiliary 5V power supply
that is on.) All microprocessors are powered up and communicating with one
another. The USB and RS232 ports are active.
seconds and plug in again. the amplifier has an internal auxiliary 5V power supply
that is on.) All microprocessors are powered up and communicating with one
another. The USB and RS232 ports are active.
On 1
Operating with the exciter only, without tube heater or HV.
To enter this state:
Press the ON/OFF (ANT SEL) button or send a command
from the serial interface.
In this state:
The internal frequency counter is active and automatically switches
antennas when you transmit. Forward power and SWR are indicated on the digital
meter and the bar graphs.
meter and the bar graphs.
Use this state when you need to access the antenna switch function but you are using
only exciter input power. The portions of the front panel display that are appropriate
in this mode are enabled and others are disabled.
only exciter input power. The portions of the front panel display that are appropriate
in this mode are enabled and others are disabled.