Hello. I thought I’d throw this in as it can clarify somethings.
From the manual.
Please refer to the discussion of filtering in
Chapter 1. ORION provides for up to seven
available mode-appropriate I-F roofing
filters , not to be confused with traditional
bandwidth filtering as provided for in DSP.
Optional roofing filters of 1.8 kHz, 500 Hz,
and 250 Hz in the ORION need to be
activated to be used by the operator.
Please note: If you activate an optional filter
position and no filter is installed, the radio
will mute on receive!
Activating the optional filters is simple. For
each of the 1.8 kHz, 500 Hz, and/or 250 Hz
optional filters that you have installed, use
the MULTI knob to change the setting from
“no” to “yes”.
Roofing filters can automatically be selected
by the radio or the operator has the option of
override to select one specific filter to be
used at all times. The available choices are
20 kHz, 6 kHz, 2.4 kHz, 1.8 kHz (if installed),
1 kHz, 500 Hz (if installed), 250 Hz (if
installed).
For automatic selection of appropriate
roofing filters, put the Xtal Filter setting on
AUTO. When using the DSP BW filtering in
the ORION (see description of (41) PBT
B/W ENCODER in Chapter 2), as a
threshold for each filter is crossed, the
roofing filters will automatically be selected.
Example: After selecting AUTO, press
MENUS to exit out of the menu system and
return to normal radio operation. As the
DSP bandwidth is narrowed, the filters will
be selected or de-selected at a value
somewhat below that of the roofing filter.
For example: the threshold where the 6 kHz
filter switches out to the 2.4 kHz filter in
AUTO mode is 2000 Hz. At 1990 Hz DSP
BW, the 2.4 kHz filter is active. At 2000 Hz,
the 6 kHz roofing filter is active. On the
screen, the roofing filter is represented by a
horizontal line on top of the DSP BW filter
shape. The line will widen or narrow as the
roofing filters switch in and out.
It is possible to override the AUTO setting
and use one specific filter at all times. To do
so, turn the MULTI knob while Xtal Filter is
is highlighted in the menu and pick a roofing
filter. Regardless of DSP BW setting, this
selected filter will be in use as the roofing
filter. Remember: optional roofing filters,
must be installed and enabled. Selecting a
non-installed filter will mute the receiver. If
selecting an installed optional filter that is
not enabled, the next highest value will be
the actual filter in use.
Each of the 250 Hz and 500 Hz optional
roofing filters used in ORION must be
centered. While DSP very accurately repeat
from unit to unit, crystal filters do not
because of individual unit manufacturing
tolerances. Set your CW offset to desired
value via the CW MENU . Tune in a carrier
of reasonable strength (S7 is good), at your
CW offset. Use the Xtal Filter control in the
menu to select the filter you want to center.
Then move down to either 500 Hz C.F. Adj
or 250 Hz C.F. Adj depending on your filter
selection. Adjust the MULTI knob for a
received signal peak. You will not have to
re-adjust these unless you do a subsequent
master reset of the radio.
Fernando N2FQ/6
n2fq@sbcglobal.net
> On Sep 16, 2016, at 9:39 AM, g3ory--- via TenTec <tentec@contesting.com>
> wrote:
>
> Gary
>
> Have I got this wrong then? On my Orion 1, in the Menu>Filter it
> appeared to me that I could select the xtal filter bandwidth OR Auto.
> I interpreted this as meaning that I could select a roofing filter
> irrespective of the DSP bandwidth setting.
>
> 73 Bob
> G3ORY
>
> ----Original Message----
> From: dukeshifi@comcast.net
> Date: 16/09/2016 14:25
> To: "Wolf Wita"<g4ssx@yahoo.co.uk>, "Discussion of Ten-Tec Equipment"
> <tentec@contesting.com>
> Subj: Re: [TenTec] Orion
>
> The Orion automatically selects the roofing filter based on DSP
> bandwidth selection. Thus it assumes that a given filter is in a
> particular position on the board. If you put the incorrect filter into
> a slot, that function will not work properly.
>
> 73
>
> Gary
>
> W0DVN
>> On Sep 16, 2016, at 12:38 AM, Wolf Wita via TenTec <tentec@contesting.
> com> wrote:
>>
>> HiI have got a 1.9 khz Filter and i wonder if i could put it in the
> slot where the 500khz filter is? i already got a 1.9 filter in the 1.9
> khz filter in the slot.ThanksG4ssx wolf
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