On 9/1/2013 1:10 PM, Matt VK2RQ wrote:
> But what about the bandwidth on the TX side?
Not a factor. With WSJT-X the rig is placed in *split* mode
and the program adjusts the transmit frequency to allow the
transmit audio to be generated between 1500 and 2000 Hz.
Thus if the receiver is tuned to 14.076 and one is working a
JT9 station with a receive "tone" of 3880 Hz (14.079.880) the
transmitter will be set to 14.078 and the transmit audio will
be 1880 Hz.
Similarly, if one is working a JT65 station with a receive
"tone" of 495 Hz (14.076.495), the transmitter will be set
to 14.074.5 and the transmit audio will be 1995 Hz.
73,
... Joe, W4TV
On 9/1/2013 1:10 PM, Matt VK2RQ wrote:
But what about the bandwidth on the TX side? Can you use DATA mode, or perhaps
use ESSB wide SSB?
73, Matt VK2RQ
On 02/09/2013, at 2:53 AM, "Joe Subich, W4TV" <li...@subich.com> wrote:
There is a 4.2 KHz lowpass filter in the audio chain to the headphones
and speaker but it is not present on the "Line Out". I regularly use
the FM (13 KHz) IF filter for WSJT-X and see 200 - 4200 Hz when the
DSP is adjusted correctly.
73,
... Joe, W4TV
On 9/1/2013 11:49 AM, Bob wrote:
Hey,
My widest filter is currently a 2.8 KHz on the main board. If I understand
things correctly, if I shift all the filters over a spot, then pop in a
6KHz AM filter for FL1, I can use that for TX and RX Data modes.
The reason I ask is that the WSJT-X program is now supporting a full 4KHz
wide waterfall that allows both JT65 and Jt9 QSOs. With my current filter
I can clearly see the upper end cuts off around 2900 Hz.
So my question is would there be anything else in the audio or DSP chain
that would prevent me from using the full 4KHz of WSJT-X while in DATA
modes if I have a wider filter in slot FL1?
Thanks in advance,
73, Bob, WB4SON
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