Dave et al:
I have the 6.0 kHz AM filter in my radio. Yes the DSP BW goes to 5
kHz. However in using the P3 I find the total bandwidth as shown to be
about 8 kHz or +/- 4 kHz of center frequency. In synchronous AM you
will have 4 kHz BW either USB or LSB depending the Shift setting.
73
Bob, K4TAX
On 11/1/2019 7:36 PM, Don Wilhelm wrote:
Dave,
That is not a problem, but a result of AM modulation.
The filters work at the IF passband.
The 5kHz is the audio bandwidth.
For an AM signal, the IF bandwidth must be twice the audio bandwidth -
there are 2 sidebands, and the audio width is only equal to the width
of one sideband.
You could try synchronous AM receive.
73,
Don W3FPR
On 11/1/2019 8:27 PM, Dave Sublette wrote:
Good evening all,
I installed the 6 KHz filter into FL1 on the main receiver today. I did
not put one in the sub receiver. To do this, I had to move four filters
from slots 1 thru 4 to slots 2 thru 5 in both receivers. So now I have 6
KHz in FL1 in the main Rx, no filter in FL1 in the sub receiver and FL2
thru FL5 match widths in the main and sub receivers. I made the
appropriate entries in the gain and setup menus. Checking them on
several
bands shows that all appears to be in order.
However, in the AM mode I can only widen the passband to 5.0 KHz. Is
this
normal operation, or have I missed something?
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