Operation
CW Communication
Use telegraph keys or external keying unit to insert into the KEY port at the tail
of the radio. (See Page 5 for the definition of wiring)
1. Insert keys into the KEY port;
2. Press [MODE] key to switch to CW (or CWR)
mode;
3. Enable the QSK function in the [KEY] key
function and set the appropriate QSK time;
4. Press telegram key to enable CW communication.
Practice mode
You can take G90S as a CW code trainer in following methods:
Disable the QSK function in the [KEY] key function. There will be only CW sidetone of transceiver after
pressing telegram keys under such conditions, but signals will not be transmitted externally.
CW automatic decoding
Long press [KEY] key to enable the CW automatic decoding. Rotate the main knob to do the fine tuning of the
received frequency till the indicator light A flashes with the code. At this time, the information about the
telegraph text after decoding will appear at the bottom of the screen.
■
Since the accuracy of CW automatic decoding is related to the reporting accuracy, signal propagation
quality, and frequency accuracy of the other radio, the CW automatic decoding can be used as an auxiliary
decoding means cooperating with the human decoding. When the automatic decoding is used, the bandwidth of
the receiving filter is recommended to be 300Hz.
The [KEY] key function includes common function setting items during
CW communication. Press the key in a short time to select:
SPEED: automatic key rate setting
M/L/R: settings of manual/ automatic left and
right hand modes
MODE: Iambic A/B mode setting
QSK switch: switch setting
QSK Time: QSK time setting
Ratio: setting of automatic key dot-and-dash
interval proportion
Enter the second function of [
KEY
] key to set CW sidetone volume and tone,
and press [
KEY
] key in a short time to switch the options:
CW Volume: sidetone volume setting
T800Hz: sidetone tone setting
B500: CW receiving band setting (the default value is 500Hz)
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