Hi all,
I was looking through the schematic for the KPA100 and it looks like the LP
filters in the amp remain in the RF path during receive. Is this the case?
If so do they provide extra LP filtering on RX?
Just sitting here with my finger poised over add to cart on the KPA100 kit
and was just
LS,
Yes, the KPA100 low pass filter for the selected band is in the circuit
at all times if the KPA100 is connected to the K2. The KPA100 circuits
required to change bands, etc are powered from the base K2 through the
ribbon cable (the 12CTRL line).
The KPA100 T/R switch circuits are bypassed
Ok thanks Don.
BTW, am I correct in observing that only the RF cable to J1, the power cable
to J4, the audio cable and the ribbon cable to the control panel are the
only connections of the KPA100 to the K2? I.e. does the RS-232 interface go
in through the ribbon cable?
Looks like it's an easy
LS,
There are no RS-232 signals on the ribbon cable. TXD and RXD are at
CMOS levels through the ribbon cable and the conversion to RS-232 levels
is done on the KPA100 board.
BTW - the AUX I/O connector on the KPA100 (and the KIO2) is just what it
says - it is NOT an RS-232 connector although
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