Panel Description; Rear Panel - microHAM DIGI KEYER Manual

All connectors for connecting the computer, radio and accessories are located on the rear panel.
(1) – PA PTT: PTT output for Power Amplifier
Ground during transmit
TIP - Signal
SHELL - Ground
(2) - LNA PTT: Control output for Low Noise Amplifier
Ground during transmit
TIP - Signal
SHELL - Ground
If the jumper is in SS position, open collector switching
transistor is connected to the PAPTT or LNAPTT output jack.
The transistor can switch up to 48V/1.5A. This position is
appropriate for modern Power Amplifiers with electronic keying
and LNA bypass relays .
Check manual of your PA and LNA to be sure the power requirements do not exceed the transistor rating.
If the requirements exceed 48V/1.5A set the appropriate jumper to the RE position. This position connects
the relay contact to the output jack. Maximum rating for the relay is:125VAC/2A or 60VDC/2A.
TIP: If you are not sure about keying voltage of your amp on LNA, use the RE position.
(3) - RADIO:
DB15F connector for radio interconnection – a detailed description is in Appendix A
(4) - REM: MiniDIN6 for PS/2 keyboard or numeric keypad.
(5) - USB:
USB B connector for computer connection. Connect a standard USB A-B cable.
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5 PANEL DESCRIPTION

Rear Panel

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