[TenTec] Orion Firmware Bug Report
James C. Garland
4cx250b at muohio.edu
Sun Jan 18 15:12:57 EST 2004
I apologize if this has been reported before, but the tuning step on the
sub-receiver in the AM mode is always 2.5 kHz, even if the step size on the
display indicates less. In other words, the subreceiver tuning display
(either VFO A or VFO B) for the subreceiver frequency seems normal, but the
actual subreceiver increments in 2.5 kHz steps in the AM mode. In CW and
SSB, it tunes properly.
Here are specifics, if you want to check this on your own Orion. I'll use
an AM station at 1000 kHz as an example, although any AM station will
work. Set the bandwidth at a narrow amount, say 1.5 kHz, and set the
tuning step size at 1 Hz. Tune slowly across the AM station, starting from
below (say 990 kHz). When the display shows 999.967 kHz, you'll hear the
station pop into intelligibility. At this point the Orion is tuned to 1000
kHz, even though the display says otherwise. Now keep tuning up in
frequency. You won't hear any change in the signal until you reach 1002.467
kHz, at which point the signal will suddenly become unintelligible again.
Now the Orion is tuned to 1002.500, even though the display reads
differently. As you continue to tune higher in frequency, the Orion
subreceiver will keep stepping up in 2.5 kHz increments, so long as it is
in the AM mode.
I hope this isn't something normal, that I missed in the manual. If so, I
apologize for using up bandwidth. In any case, I hope a future firmware
revision fixes it, because it makes tuning AM on the subreceiver
unsatisfactory. I'm using the latest firmware release.
Jim Garland W8ZR
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