OPTION 006 Avionics
Annex-A-4
Performance data
The following specification is in addition to that included in the 2050T series specification.
ILS mode
Sum of Depth of
Modulation (SDM)
Range:
0 to 99.9% in 0.1% steps representing the arithmetic sum of the
individual tone depths.
Selection:
By keyboard entry of data and variation by
×
/
Ø
keys and rotary
control.
Accuracy of SDM:
±2% of setting for carrier frequencies up to 400 MHz.
Difference in Depth
of Modulation (DDM)
DDM can be entered in % or as a modulation index.
Range:
0 to 20% in 0.01% steps. 20 to 99.9% in 0.1% steps.
Selection:
By keyboard entry of data and variation by
×
/
Ø
keys and rotary
control.
Accuracy of DDM:
±0.02 of DDM setting ±0.0003 DDM (0.03% depth).
At 0 DDM (on course) accuracy is ±0.0003 DDM (0.03% depth);
At 0.155 DDM accuracy is ±0.0034 DDM (0.34% depth).
Tone frequencies:
90 Hz, 150 Hz nominal. Tone frequency may be adjusted by varying
the ILS repetition rate of 30 Hz in 0.1 Hz steps. Tone frequencies
maintain 3:1 and 5:1 relationships with the ILS rate.
Tone suppression:
Either tone can be suppressed.
Additional modulation:
Available for 0% DDM from an internal or external modulation source.
Frequency accuracy:
As frequency standard.
LF output:
Available from the LF OUTPUT connector.
Accuracy of DDM:
Equivalent to ±0.0003 DDM ±0.005 of setting. At 0 DDM (on course),
accuracy is ±0.0003 DDM.
Marker beacon mode
Provides default modulation of 95% AM depth on a 75 MHz carrier at
the modulation rate of 400 Hz (outer beacon), 1.3 kHz (middle beacon)
or 3 kHz (inner beacon). AM depth, carrier frequency and modulation
frequency can be changed from the default values.
VOR mode
9.96 kHz sub-carrier
Range:
0 to 49.9% depth in 0.1% steps.
Modulation:
Frequency modulated by a 30 Hz tone with settable deviations of
240 Hz, 300 Hz, 360 Hz, 420 Hz, 450, 480 Hz, 510 Hz and 540 Hz.
30 Hz tone
Range:
0 to 49.9% depth in 0.1% steps.
Arithmetic sum of 30 Hz tone and sub-carrier AM depth are limited to
99.8%.
Selection:
By keyboard entry of depth and variable by
×
/
Ø
keys and rotary
control.
Bearing control:
Relative phase of 30 Hz tone and sub-carrier modulation adjustable
from 0° to 359.99° in 0.01° steps by entering VOR bearing. Bearing
can be entered as TO or FROM the beacon.
Bearing accuracy
±0.05°.
Additional modulation:
Available on 0° bearing from an internal or external modulation source.
AM depth accuracy:
±3% of setting ±0.5% for carrier frequencies up to 400 MHz (from
100 MHz to 400 MHz with Option 12).
Frequency:
The VOR repetition frequency of 30 Hz may be varied in 0.1 Hz steps.
The sub-carrier frequency and deviation maintain a fixed relationship
with the VOR repetition rate