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All of the power amplifier settings and timing relationships for sequential keying are defined on this tab.
Read this section carefully. The settings on this tab are important to prevent hot switching.
Power Amplifier:
If you are using a power amplifier, is necessary to control it from the Station Master PA port and not directly from
the transceiver. Pin assignments for the signals at the PA connector are in Appendix A.
The Power Amplifier port contains several signals:
KEYOUT (pin 7): Output for PTT keying to the amplifier.
IMPORTANT: The KEYOUT line is an open collector circuit capable of 45V @ 800mA maximum. If
the open circuit voltage is more than 48 volts or negative, a keying buffer must be used
between Station Master and the amplifier. All modern amplifiers including all solid state
power amplifiers can be switched directly without a buffer.
KEYIN (pin 6): Input from PA, which switches low (close to ground) when the amplifier is ready for RF. If your
amplifier supports such output, always connect it to KEYIN and check the Key In flag at the bottom of
this tab. If the amplifier output is active high (e.g., SPE Expert), check the Invert Key In flag .
POWER SW (pin 9): Some amplifiers can be turned on and off remotely by applying +12V to a remote input.
Station Master supports this function and provides switched +12V output on POWER SW pin. This
output is frequency dependent; Station Master permits selecting which power amplifier operation on a
per-band basis. PA On is set on the Bands tab.
CI-V (pin 5): Icom format and level compatible output signal for automatic control of a power amplifier or
antenna tuner using the Icom interface. The proper Baud Rate and CI-V Address for the amplifier
or tuner should be set at the bottom of this tab (see your amplifier or tuner manual for the proper
parameters). The CI-V port supports the same functions as the Antenna tab serial port. For
transmitting devices (amplifier or tuner), TX frequency recommended.
BCD BAND DATA (pins 1-4): TTL Band Data in Yaesu format for automatic band switching of amplifiers or
turners that use the Yaesu interface. The BCD code for each band can be defined on the Bands tab.
microHAM provides optional PA cables for most modern automatic and solid state amplifiers currently available
on the market. Check your vendor's website or
Antenna Switch:
To safely switch between transmit and receive antennas, Station Master must know how long it takes your
antenna switch to operate in order to prevent power output by keeping INHIBIT active until the switch settles.
The data should be entered in the Switch Delay field. For all microHAM antenna switches, 26ms is a safe time.
Contact the manufacturer or vendor of your antenna switch to obtain the delay value if you are using a switch
from another manufacturer.
A Break-before-make delay can be set, for antenna (ANT) and band-dependent (BPF) switches that may
require it.
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PA & SEQUENCER
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for cable diagrams, availability and price.
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