Glideslope Mode Field Definitions - Aeroflex NAV 2000R Operation Manual

Aeroflex Operation Manual
DDM
Programs the modulation percentage of the 90 and 150 Hz tones. The valid entry range for this field is
from .000 to .400 DDM (Difference in Depth of Modulation) in .001 steps. The NAV 2000R computes the
percent of modulation ratio between the 90 and 150 Hz tones required to produce the commanded DDM.
When a valid Localizer DDM "hot" key is pressed the DDM will automatically be accepted. If a G/S DDM
"hot" key is pressed, the system will accept it and will display, momentarily on the prompt line, the
warning message: "NON-STANDARD DDM VALUE". Pressing the 90 or 150 Hz "hot" key will alternately
shut off or turn on that tone to allow quick testing of a drop out of either tone at preset DDMs.
LEFT/RIGHT
Specifies whether the Localizer reference is either LEFT/150 or RIGHT/90. When this toggle type field is
selected, the current 90 and 150 Hz modulation percent data fields are switched. The default value is
LEFT/150.
90 Hz MOD
Specifies whether the 90 Hz signal is to be modulated. The field toggles between ON and OFF whenever
the SEL key is pressed while the field is selected. The 90 Hz hot key will also toggle the current 90 Hz
modulation state.
150 Hz MOD
Specifies whether the 150 Hz signal is to be modulated. The field toggles between ON and OFF
whenever the SEL key is pressed while the field is selected. The 150 Hz hot key will also toggle the
current 150 Hz modulation state.
3.5.9 GLIDESLOPE MODE FIELD DEFINITION
Glideslope test mode is entered by pressing and releasing the LOC/GS mode select button. This mode is
used to test and align the Glideslope portion of ILS equipment.
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RF LEVEL
This field allows the RF level to be programmed. The RF level may be programmed with 1/10th dBm
resolution using either dBm or uV/mV units. DBm numbers are entered using the ENT key. Microvolts
and millivolt numbers may be entered using the uV and mV keys (STO/RCL) respectively. The default
displayed units (normally dBm) may be changed by pressing the SEL key and then pressing either the
uV, mV, or dBm keys.
NAV 2000R SIGNAL GENERATOR - REV. 0 – JULY 26, 2007 - PG 3-14