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时间:2010-09-08 00:40来源:蓝天飞行翻译 作者:admin
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let the weather refresh. The lower the range the faster is the refresh time.
If a yellow “PAC” string is visible then you have selected a range that is out of
the PAC range, that means reflections over 80NM are not accurate.
The colored boxes on the top of the radar show you the colors used for
drawing the image with the actual settings.
LIPB 237m
LSZH 428m
LSZS 1600m
AOG AOG SA_WXR Users Manual Revision 1.6
http://members.chello.at/addongauges Page - 15 -
When beginning taxi roll, switch the radar to WXR and let it warm up.
Depending on your processor speed this could take one to two minutes. Set tilt
up to 1.75 degrees to eliminate ground reflections. Range is taken from the
ND when used, else set 40NM-80NM initial.
The picture is refreshed every 8-10 seconds depending also on your
processor speed, but this is also a realistic value.
Do not take off directly into thunderstorms near the field, if possible
request turns immediately after take off to avoid.
If yellow reflections are present, check the turbulence with WX+TURB mode
and check. Taking off in heavy turbulence may causes stall speed exceeding
in initial climb out.
During climb try to set the tilt around your actual Flight Path angle, PM draw it
into the artificial horizon when enabled. Let the OFP switched on during the
whole flight, the GCS will become interesting during descent.
During Level flight you can leave the tilt neutral, but check the OFP is on!
Else you may be surprised by a tall thunder cloud.
When entering the descent phase, turn GCS on. So ground clutter is mostly
suppressed. Here it is up to you to find out good tilt values. You may set it to
your Flight Path Angle as during climb, or you can set it to find out weather to
any other point of interest. (IAF, rwy threshold etc)
7 FSUIPC Control
7.1 Control variations
Since it is difficult to fit all cockpit builders concepts, I had three different variations in
controlling SA_WXR:
1. Command based control (recommended) implemented since SA_WXR 1.2.4
Similar to Project Magenta’s ND commands.
2. Bit toggle based communication.
3. Bit state based communication
AOG AOG SA_WXR Users Manual Revision 1.6
http://members.chello.at/addongauges Page - 16 -
7.2 Command based communication
Write to 0x6D00 1 byte for commands
Write to 0x6D01 1 byte for absolute tilt value (write positive values only)
To control SA_WXR functions write following commands to 0x6D00 in FSUIPC.
When the command is processed the 6D00 is cleared to 0. Then you can write the
next command.
Tilt value at 0x6D01 is used for Tilt setting.
Command Value Function Remarks
1 RADAR OFF
2 RADAR ON/ MODE WXR
3 RADAR ON/ MODE
WX+T
Warmup phase initially
5 GCS OFF
6 GCS ON
7 OFP ON
8 OFP OFF
9 RANGE 10NM
10 RANGE 20NM
11 RANGE 40NM
12 RANGE 80NM
13 RANGE 160NM
14 RANGE 320NM
15 RANGE increase
16 RANGE decrease
17 SET Tilt of 0x6D03
positive
0-40 (equals 0-15 deg in
0.25 deg steps)
18 SET tilt of 0x6D03
negative
0-40 (equals 0-15 deg in
0.25 deg steps) but is
written negative then
Examples:
Switch radar on: Write 2 to 0x6D00, wait until 0x6D03 is cleared afterwards
Set 160NM range: Write 13 to 0x6D00, wait until 0x6D03 is cleared afterwards
Set Tilt of 2.25 degrees: Write 9 to 0x6D03 (2.25/0.25=9)
Write 17 to 0x6D00 (set +2.25° of Tilt)
AOG AOG SA_WXR Users Manual Revision 1.6
http://members.chello.at/addongauges Page - 17 -
Set Tilt of -5.25 degrees: Write 21 to 0x6D03 (5.25/0.25=21)
Write 18 to 0x6D00 (set -5.25° of Tilt)
7.3 Control via FSUIPC Bit manupulation
Two words are used:
Control-Word at (Write) 0x6D00 as long as Bit 7 = 0 which means toggle
mode
Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
Toggle/
Switch
select
(0)
Range
dec
Range
inc
Toggle
OFP
Toggle
GCS
Set to 1 Toggle
Mode
Bit15 Bit14 Bit13 Bit12 Bit11 Bit10 Bit9 Bit8
Res. Res. Res. Res. Toggle
Window
Tilt dec Tilt reset Tilt inc
Whenever you write here set bit 1 to “1”, else the radar would ignore the
requests. These bits are toggled, that means setting a bit to 1 would request the
action at the radar, if recognized it is set back to 0. Multiple requests are
possible.
Bit0 witches through the Modes OFF, WX, WX+T or WARMUP initially.
Control-Word at (Write) 0x6D00 as long as Bit 7 = 1 which means switch
mode
Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
Toggle/
Switch
 
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