OPTION 006 Avionics
Annex-B-7
Fig. B-3 Avionics mode selection menu
([DME] is only available if Option 010 is fitted)
ILS mode
Pressing [ILS] and then pressing the [SIG GEN] key will result in the display shown in
Fig. B-4. The default carrier frequency for ILS mode is 108.1 MHz.
Fig. B-4 SDM selection menu
The sum of depth of modulation (SDM) is the arithmetic sum of depth of the modulating
90 Hz and 150 Hz tones. Using the [SDM] key the depth can be entered in %. The ILS rate is
normally set to 30 Hz and is the ILS waveform repetition rate. Its frequency can be modified
using the [ILS Rate] key. If the ILS rate is adjusted the frequency of the 90 Hz and 150 Hz alter
on a pro-rata basis (e.g. If ILS Rate = 29 Hz the tone frequencies are 87 Hz and 145 Hz).