Rf Output Level - Aeroflex NAV 2000R Operation Manual

Aeroflex Operation Manual
DDM
Programs the %MOD 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) with .001 resolution. The NAV 2000R computes the percent of
modulation ratio between the 90 and 150 Hz required to produce the commanded DDM. The percent of
modulation of each tone will be set to the proper ratio forcing both tones to total the standard modulation
of 40%. The default value for this field is .000 DDM, 20% modulation for each tone.
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 %MOD data fields are switched. The default value is LEFT/150.
FREQ. MHz
This field allows the RF frequency to be programmed. The RF frequency may be programmed in
0.00001 MHz steps within the NAV 2000R frequency range of .15 MHz to 450 MHz.
CHANNEL
This field steps the RF frequency output up and down in 50 kHz steps using the cursor control up and
down arrow keys.
TOTAL %MOD
This field allows changing all the percent modulation fields respective to one another. That is, changing
the total percent modulation will allow all current modulations to be changed equally, maintaining the
ratios between one another.
AUDIO
Selecting the audio control mode field alters the NAV 2000R's Localizer mode of operation. The audio
control mode, designated as the "LOCa" mode, commands the NAV 2000R to allow the Localizer audio
composite output to be varied. Within this mode, RF control is not allowed and the RF attenuator is fixed
for a minimum RF output level of -127 dBm. Also, no identification coding is allowed. The alternate LOC
mode of operation will continue until the LOC button is pushed while the LOCa control page is selected.
PAGE 2:
90 Hz FREQUENCY
Programs the 90 Hz frequency. A frequency from 72.0 Hz to 108.0 Hz in 0.1 Hz step may be entered.
Any frequency, other than the default setting of 90.0 Hz, will cause the VAL flag to enunciate.
NAV 2000R SIGNAL GENERATOR - REV. 0 – JULY 26, 2007 - PG 3-11