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USER'S GUIDE
2.7.3.1
DC Keying
If you choose the DC keying method, consult your radio's instruction manual to deter-
mine if your radio uses negative or positive keying polarity.
1. Connect a two-wire shielded cable from the PK-232's positive (J9) or negative (J10)
keying jacks to your radio's CW key input connector.
2. Set your radio's Mode Selector switch to the "CW" position and operate the radio as
though you were using a manual or hand key. Your PK-232 will key the radio in
Morse without requiring any additional wiring.
2.7.3.2
AFSK CW Keying
If you choose the audio keying method, you'll use the same cables and connections to
the microphone input circuits previously described for RTTY, AMTOR and Packet.
1. Connect your radio to a dummy load.
2. Set your radio's Mode Selector switch to the "USB" or "LSB" position. Your PK-232
will key the PTT line and send a keyed single audio tone to the radio's microphone
input.
3. While typing random letters at your keyboard, adjust the radio's microphone gain
control until the radio's plate current or output power levels are correct according to
the manufacturer's ratings for CW operation.
4. All other radio and PK-232 adjustments are the same as in RTTY, AMTOR and Pack-
et.
2.7.4
Oscilloscope Connections
You can connect an "X-Y display" tuning oscilloscope to Pins 3 (mark) and 5 (space) on
rear-panel connector J7. Connect the oscilloscope ground to Pin 2 of J7.
PK232UG Rev. B 9/86
2-18
INSTALLATION
36
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