Kantronics KAM, Руководство пользователя

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Chapter 4 - Operation
27
You should study these commands, listed in the command section, to determine if you wish to
make any changes prior to entering the RTTY/ASCII Mode. The default settings are generally those
most suitable for use with any transceiver/computer combination. Generally your transceiver
should be in LSB if you are not using FSK. Other commands affecting flow control between your
computer and the KAM may require adjustment. This may be determined by consulting your com-
puter manual.
To enter either the RTTY or ASCII Mode, at the
cmd:
prompt enter the appropriate command.
Entering either
Rtty
or
Ascii
alone will cause the unit to enter that mode at the default, speed
specified by RBaud or ASCBaud . If you wish you may specify a speed by adding the appropriate
baud rate with the command. For example, entering the command Rtty 50 will cause entry into
the RTTY Mode at a speed of 50 baud (67 WPM). Be sure to include a space between the
Rtty
command and the desired speed.
The KAM uses a BAUD rate designation rather than the usually encountered words-per-minute.
BAUD/RTTY wpm correlation is shown in the following table:
BAUD WPM
45 60
50 67
57 75
75 100
100 132
You may set any desired baud rate, in 1 baud increments, up to a maximum of 500 baud.
However, HF Operation is limited to 300 baud.
You may specify the desired shift while in Command Mode before selecting RTTY Operation.
See the shift command in the command section, Selection of the Modem position selects the use
of the Mark and Space tones you have entered into the unit. See the command section of this
manual for setting Mark and Space frequencies.
While in the RTTY Mode, entering CTRL-C S will sequentially select Standard shifts: 170, 425,
850, Modem. For example, enter RTTY Mode and hit CTRL-C S four times. You will get:
cmd:
R
-RTTY 45-
-425 SHIFT-
-850 SHIFT-
-MODEM SHIFT-
-170 SH1FT-
Tuning RTTY and ASCIT Signals is simplified by use of the LED bargraph. While observing this
indicator system, tune for an alternate blinking of the end segments of the bargraph. If you fail to
obtain this indication try selecting a different shift. If the proper visual indication is obtained but
garbage is printed on the screen, try inverting the Signal using the
INvert
command or
CTRL-C I
.
Transmit commands are the same as for CW Operation.
CTRL-C
and
T
.
FSK OPERATION
Polarity of FSK keying is not standardized by manufacturers of amateur radio equipment. If
you have cabled your system for FSK rather than AFSK and find your transmitted signal is inverted,
you may correct the problem with the
FSkinv
command.