Bendix/King KX 125 NAV/COM system ver 1.0

Bendix/King description:
If you're a value-conscious pilot, chances are you've been waiting for a
NAV/COMM that would deliver more than just a low price. So we designed our new
panel-mounted KX 125 to offer more features, reliability and capability than
other low-cost NAV/COMM on the market.

Equally at home in a new installation, as a replacement radio or a very
affordable back-up, the TSO'd KX 125 gives you the performance and ease of
operation you've come to expect from Bendix/King avionics. With a separate,
newly designed NAV section and a COMM section based on our popular KY 96A, the
KX 125 combines innovation with proven technology.

High-Performance Features
The self-contained KX 125 is very compact, measuring 2 inches high by 6.25
inches wide. Yet is offers the same transmitter power as our legendary KY 170
series a minimum 5 Watts (7 Watts nominal). The KX 125 utilizes a back-lighted
liquid crystal display (LCD).


Note:
For further information and comparing the gauge with the original instrument,
visit http://www.bendixking.com/static/brochures/index.html
and download the product brochure for the KX 125.


Description:
This gauge is a combined NAV/COM radio. It provides the traditionell FS NAV and
COM features as well as built-in course deviation indicator, OBS mode and more.

This gauge has functional buttons and knobs like the real instrument.

The buttons and knobs:
See the picture ExplKX125.bmp which gives an overview of the functions.

The power knob switches the radio on and off. Clicking on the knob opens/closes
the FS ATC menu.
You can have the power switch always set on and use a central avionic circuit
switch in your main panel to set the power of ALL radios in this package.

The <--> button (vertical) on the left side swaps the COM frequency from standby
to frequency in use. Only the standby frequency can be changed.

The COMM selector knob at the left side of the radio has two parts: A large knob
and a small knob. The large knob increases/decreases the whole digits and the
small knob increases/decreases the fractal digits of the COM standby frequency.
Clicking in the center of the knob "pulls out" the small knob and controls
changes of 25kHz. When "pushed in" it controls changes of 50kHz.

The MODE button cycles through the three NAV modes Course Deviation Indicator
(CDI), Bearing to the VOR station (BRG), Radial from the VOR station (RAD) and
it activates the built-in "Auto-TO" mode.

In CDI mode the display in the middle shows a course deviation scale with moving
CDI bars. Each dot on the scale represents two degrees of deviation. "OBS" along
with a three-digit OBS setting is annunciated beneath the scale. If the
frequency in use is an ILS localizer, the display shows the CDI scale and
indicates "LOC" and no other data. No other modes are selectable while a
localizer frequency is active.
Read more about using the CDI mode below.

In BRG mode the display presents a three-digit "bearing-to-the-station"
information and the annunciator "TO". In this mode the CDI scale and OBS
information is not displayed.

In RAD mode the display presents a three-digit "radial-from-the-station"
information and the annunciator "FR". In this mode the CDI scale and OBS
information is not displayed.

Clicking the MODE button while in RAD mode activates the "Auto-TO" mode. This
brings up for 2 seconds the CDI mode with a centered deviation bar, a "TO"
indication and an OBS setting indicating the direct course to the station.
After that the indicator will return to the normal CDI mode.

The IDENT knob toggles the sound of the Morse ident code on and off. This knob
interacts with the Bendix/King audio selector panel KA 134 of this package.

The NAV selector knob on the right side of the radio has two parts: A large knob
and a small knob. Clicking in the center of the knob activates the OBS mode.
Depending on the current mode (NAV or OBS) the knob has different functions:

- while in NAV mode the large knob increases/decreases the whole digits and the
small knob increases/decreases the fractal digits of the NAV standby frequency.

- while in OBS mode the large knob increases/decreases the OBS in ten degree
steps and the small knob increases/decreases the OBS in 1 degree steps.
With this feature you preselect the desired radial to/from the station.
The operation is equal to OBS setting in the VOR instrument in the main panel.

The <--> button (vertical) on the right side swaps the NAV frequency from
standby to frequency in use. Only the standby frequency can be changed.


How to use the course deviation indicator (CDI):
"Pull" the OBS knob to set the radio in OBS mode.
Click left/right of the large and/or small knob to dial the desired VOR radial.
Watch the CDI scale and the moving bars in the middle display. The annunciator
right hand of the three-digit OBS setting indicates the TO/FROM flag.
If you proceed TO the station, the indicator is "TO", if you proceed FROM
the station, the indicator is "FR". The course deviation is indicated by
little bars on the right or left side of the CDI scale center. Each dot
represents a value of 2 degress. To intercept the desired radial "fly into the
bars".
If the NAV signal strength is low, "---" and "FLAG" will be displayed instead of
the OBS setting and the CDI shows up all bars left and right.

If the NAV frequency in use is an ILS localizer, the display shows the CDI scale
and indicates only "LOC" instead of other navigation data. In this case no other
modes are selectable.
Hint: The KX 125 does not provide glideslope information.


Notes:
This is version 1.0 of this gauge and if any updates are required I will release
them. Send me an email if anything doesn't work as expected.

Copyright and Distribution:
This gauge is released as Freeware.
Copyright (C) Gerd R. Nehr, GeRoN Brainware
As freeware you are permitted to distribute this archive or the gauges contained
therein subject to the following conditions :

- The archive must be distributed without modification to the contents of
the archive. Redistributing this archive with any files removed or modified
is prohibited.

- You can use this gauge in any panel of your own. You may also freely
distribute this gauge, subject to the no money restriction.

- No charge may be made for this archive other than that to cover
the cost of its distribution. If a fee is charged it must be
made clear to the purchaser that the archive is freeware and
that the fee is to cover the distributor's costs of providing
the archive. You may NOT make money with this gauge in
any form. The undersigned asserts his legal and international
right to be recognised as the author of this gauge.

- The authors' rights concerning this archive must be respected.


GeRoN Brainware
Gerd R. Nehr
gnehr@gat24.de