SCS Pactor, Руководство по установке

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3. Installation
to peak) input voltage. It is not recommended to use very high
PSKAmpl
values and
compensate this by lowering the mic gain setting, because this may already overdrive the first
amplifier stages which are very sensitive and located in the signal path before the mic gain
controlling device. We recommend for the first approach to use the default PSKA value of 140
and then regulate the output power for PSK with the mic gain setting (if available). To do this
connect the TRX to a dummyload resistor capable to dissipate the power or to an antenna with
good SWR (take care that the frequency being used is not already occupied). Entering
U 3
<Return> starts the Unproto mode 3 (=100 Bd DBPSK). Now you can use the mic gain knob to
increase the transmitting power until the ALC voltage reaches the allowed limit.
Don’t overdrive the TRX because in this case the signal will be spreaded by intermodulation!
With proper settings the peak envelope power will nearly be equal to the maximum output
power of the TRX. In this case the average power will approximately be the half of the
maximum power, so also continuous operation will not cause problems at all. Don’t be
confused as many modern TRX only display the peak envelope power. If it is necessary to set
the MIC-Gain value to more than half of ist maximum, it is recommended to increase the
PSKAmpl
value. This for example can be done entering <ESC>
FSKA 200
<RETURN>. If
no MIC-Gain potentiometer is available the proper PSK amplitude setting has to be evaluated
with only using the
PSKAmpl
command.
After the PSK amplitude is carefully adjusted, the MIC-Gain setting at the transceiver should
not be touched any more, otherwise it could be difficult to achieve the desired output level
for non-PSK modes.
To adjust the output level for non-PSK modes (FSK, CW, PACTOR-I, AMTOR, RTTY) only
the
FSKAmpl
command should be used now. Entering
U 1
<RETURN> starts the Unproto
mode 1 (=100Bd FSK). Now you have the chance to adjust the output value using the
FSKAmpl
command e.g. <ESC>
FSKA 100 <RETURN>
. Same as before, during this
procedure take care for not to exceed the ALC limit.
To prevent damage from the transceiver at continuous operation we recommend to limit the
FSK output level to half of the maximum possible, that means 50 W if the transceiver is made
for 100 W at max.
3.6 Transceiver Remote Control (PTC-IIpro, PTC-IIusb, PTC-IInet)
The
SCS
PTC-IIpro is equipped with a connector for controlling many common modern
amateur radio transceivers. Virtually all newer transceivers from KENWOOD, ICOM,
YAESU, SGC and R&S allow remote controlling of various functions via a serial interface.
Depending on type and manufacturer, almost all the transceiver parameters can be read out and
changed. For example frequency, filter, operating mode and much more can be controlled.
With radio equipment that is digitally controlled the list of functions is almost unlimited.
The PTC-IIpro uses this features mainly to set and readout the frequency of the transceiver.
You find more about the transceiver remote control in chapter TRX in the main manual.
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