Chapter 4 - Operation
18
CHAPTER 4
OPERATION
OPERATING MODES
Before you put the KAM on the air, you should spend a few reading sessions learning how the
unit operates. The KAM operates in five modes: CW, RTTY, ASCII, AMTOR ARQ and AMTOR Mode B
(FEC or SELFEC) and Packet. Only Packet operation is available through the VHF port while any
digital mode, including Packet, may operated through the HF port.
INITIAL CONFIGURATION
Operator programmable parameters affect operation of the KAM. When you initially turn the
KAM on, all parameters are set for normal operation (their default values). All the parameters are
explained in the commands section of this manual. This section will deal only with those parame-
ters and commands which affect your initial operation of the unit.
The parameters of three commands –
MAXUsers
,
PMode
and
Kamport
– determine the state or
mode that KAM will be in upon power-up. These commands also perform other duties. See the
commands section for details. Briefly:
MAXUSERS
MAXUsers
set the allowable number of simultaneous Packet connections on HF and VHF. In
fact, the KAM can be put in one of three distinct configurations using the
MAXUsers
command.
The default setting of 10/10 configures the KAM for HF/VHF operation. Simultaneous HF and
VHF Packet connections are possible. HF digipeating, VHF digipeating and HF/VHF gateway are
available. RTTY and CW type operations are available on the HF port while digipeating on the VHF
port. The available RAM (about 30 kBytes) is divided into 6 buffers: terminal input/output, HF
Packet input/output and VHF Packet input/output.
Setting
MAXUsers
to 10/0 configures the KAM for HF only operation; likewise, setting
MAXUsers
to 0/10 configures the KAM for VHF only operation. In either of these configurations, the /H or /V
indicators are suppressed and only the appropriate
STReamsw
character is active. The available
RAM is divided into 4 buffers: terminal input/output and Packet input/output. The size of the buf-
fers are therefore a little larger in HF or VHF only operation.
FUlldup
is only active in VHF only operation.
Kamport
is only active in HF/VHF operation.
PMode
is only active in HF/VHF or HF only operation.
EXTmodem
is only active in HF/VHF or VHF
only operation.
PMODE
The default setting of this command is NONE. The parameter of
PMode
can be NONE or one of
the other operating modes. The
PMode
parameter determines the mode the KAM will be in upon
power-up. The default setting of NONE allows KAM to come on in the Packet mode.
KAMPORT
The default setting of this command is VHF. The alternate setting is HF. The KAM will address
the port set by
Kamport
on initial power on.
With these parameters in their default factory settings, you can operate VHF Packet, HF Packet,
CW, ASCII, RTTY or AMTOR. Changing the settings or values of these parameters will determine
the overall operating capabilities and power-up configuration of the KAM.
COMMAND MODE
Command Mode is to enter commands which alter the KAMs operating parameters. In addition,
Command Mode is used to enter all operating modes except Packet. AT SIGN-ON THE UNIT IS SET
FOR PACKET OPERATION. All other operating modes such as CW must be entered from Command
Mode. When the KAM is in Command Mode, the characters
cmd: are printed as a prompt at the
beginning of each input line. This is the KAMs signal that it is waiting for instructions. The KAM
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