D: Digital Mode
“d” on the display
This mode allows the transmission of PSK, RTTY or CW using a connection to a PC sound card (desktop, laptop or PDA)
running the “Pocketdigi” program by OK1IAK. The use of this mode is explained in detail at the end of this manual.
●
Click <
MENU
> to escape or exit this mode.
P: Program user preferences
“P” on the display
This mode stores the current state of the rig into Flash memory to use as the default values on power up. The current
operating frequencies for both bands will become the power up frequencies, along with the current code speed. In
addition, you can turn off the Morse annunciation for functions which also use the display for feedback. Turning off the
Morse speeds things up a bit.
●
Push <
MENU
> or <
RIT
> to exit with no action taken.
●
To turn Morse off or back on, push the <
Tune Up
> button.
●
To store the current state of the rig, push the <
TUNE DOWN
> button.
Restoring default values:
If you wish to restore the original default power on frequencies, this can be done by holding the <
MENU
> switch closed
while power is applied to the rig. These values can then be stored into memory with the above procedure. Calibration
values are not affected. These values can be restored using the calibration mode, which will also reset the initial power on
frequencies.
Straight key mode:
Straight key mode is automatically detected and enabled when the rig is powered up when a monaural plug is in the
paddle jack. The sleeve of the mono plug grounds the dash input, which enables straight key mode. Straight key mode
also allows use of an external keyer if one so desires.
Operating voltages:
The MTR has been optimized for operation at 9 volts, with a minimum operating voltage of 6 volts and a maximum of 12.0
volts. Since power output is dependent on supply voltage, power output will vary from a low of about 900 mw at 6 V and
up to about 5 watts at 12 volts.
NOTE: Since there is no fuse or current limiting in the rig, using a 1A in-line fuse in the power supply cord is highly
recommended.
HIGH SWR CAUTION:
If operating the MTR with supply voltages greater than 9 volts, please ensure there is a low SWR load connected to the rig.
High SWR conditions (especially those which are reactive) when operating above 3 watts output may cause the PA stage to
become unstable or cause the PA FETS to be damaged. Be very careful when using a fully charged gell cell to power the
rig!
It is highly recommended that a resistive SWR bridge be used if an antenna tuner is needed to match the antenna.
Spare DC power plug
: Mouser part number 171-3219-EX 1.7mm x 4.4 mm
21
Summary of Contents for Mountain Topper
Page 22: ...Schematics Receiver section 22 ...
Page 23: ...CPU TRANSMITTER Sections 23 ...