OPTION 006 Avionics
Annex-A-16
Fig. A-17 ADF mode selection menu
The carrier frequency will default to 190 kHz and the modulation depth to 30% from a 1 kHz
source. This setting is used to simulate a long wave transmitter for direction finding purposes. The
instrument operation is very similar to non-avionics modes with a single modulation selected
(except that FM cannot be selected).
Pressing the
[Avionics Modes]
key returns the display to the
Avionics Mode Selection Menu
shown
in Fig. A-3.
SEL-CAL mode
The SEL-CAL mode can be used to test receivers using AM Selective Calling Tones to the
selective calling format. The mode can be selected from the
Avionics Mode Selection Menu
shown
in in Fig A-3. Selecting
[SEL-CAL
and pressing the [SIG GEN] key produces the display shown
in Fig. A-18.
RF
Level
Carrier
Freq.
LOCAL
AM
ON/OFF
AM
Depth
Source
Freq: F1
Avionics
Modes
Send
Tones
Select
Source
SEL-CAL
Code
Carrier :
Freq.
RF Level:
dBm
SEL-CAL Mode
Modulation ENABLED
MHz
Int Std: 10 MHz
AM :
Int F1: 1.0000 kHz
OFF
118.000 0000
-144.0
ON
80.0 %
C1133
Fig. A-18 SEL-CAL mode selection menu
The instrument operation is similar to that in non-avionics modes with a single modulation
selected (except that FM cannot be selected). Carrier frequency and AM depth can be altered, but
always default to 118 MHz and 80% respectively.
The SEL-CAL tones can be sent by pressing the
[Send Tones]
key. While the tones are being sent
Modulation ENABLED
is replaced by the message ***
SENDING TONES
*** and the normal
modulation tone is suppressed.
The SEL-CAL code can be modified by pressing the
[SEL-CAL Code]
key to produce a display
similar to the one shown in Fig. A-19. Operation of this facility is identical to that of the
Sequential Calling Tones Utility
in non-avionics mode. The tone duration and gap can be set but
the default values are those usually used for SEL-CAL. Alternative standards can be selected
using the
[Select Standard]
key. The
[Mode Control]
key can be used to change the mode from
single shot but the default setting in always single shot.