Aeroflex Operation Manual
TABLE OF CONTENTS - NAV 2000R – REVISION 0 – JULY 26, 2007 - PAGE TC-2
SECTION III
OPERATION (Con't)
SECTION PAGE NUMBER
3.5.18 STORING & RECALLING SETUPS.....................................................3-24
3.6 REMOTE USER INTERFACE..............................................................3-24
3.6.1 GPIB REMOTE INTERFACE DESCRIPTION .....................................3-24
3.6.2 COMMAND LIST..................................................................................3-25
3.7 USING THE EXTERNAL AUDIO INPUT..............................................3-34
3.8 USING AUDIO OUTPUT......................................................................3-35
SECTION IV
THEORY OF OPERATION
4.1 GENERAL INFORMATION..................................................................4-1
4.2 UNIT DESCRIPTION............................................................................4-1
4.2.1 FRONT PANEL ....................................................................................4-1
4.2.2 REAR PANEL.......................................................................................4-1
4.2.3 CHASSIS INTERIOR LAYOUT............................................................4-1
4.3 FUNCTIONAL DESCRIPTION.............................................................4-2
4.3.1 RF OUTPUT LEVEL.............................................................................4-2
4.3.2 FREQUENCY.......................................................................................4-2
4.3.3 VOR SIGNAL GENERATOR................................................................4-2
4.3.4 ILS SIGNAL GENERATOR..................................................................4-2
4.3.5 COM SIGNAL GENERATOR...............................................................4-3
4.3.6 SYSTEM COMPUTER BOARD THEORY OF OPERATION...............4-3
4.3.7 DSP BOARD THEORY OF OPERATION............................................4-4
4.3.8 RF MODULATOR MODULE DESCRIPTION ......................................4-5
4.3.9 MODULATOR GENERAL OPERATIONAL DESCRIPTION................4-6
4.3.10 AUDIO BOARD OPERATION..............................................................4-6
4.3.11 RF MODULATOR BOARD OPERATION.............................................4-7
4.3.12 PROGRAMMABLE STEP ATTENUATOR CIRCUIT...........................4-8
4.3.13 SYNTHESIZER ....................................................................................4-8
4.3.14 REVERSE POWER PROTECTION MODULE OPERATION
(-50 UNIT WITH MOD STATUS 7 ONLY)............................................4-10
4.4 NAV 2000R SOFTWARE.....................................................................4-10
4.4.1 SELF TEST...........................................................................................4-10
4.4.2 CALIBRATION......................................................................................4-11
4.4.3 MEMORY USAGE AND INITIALIZATION............................................4-11
4.5 DETAILED CIRCUIT DESCRIPTION...................................................4-12
4.5.1 MOTHER BOARD CIRCUIT DESCRIPTION.......................................4-13
4.5.2 SYSTEM COMPUTER (CPU) BOARD CIRCUIT DESCRIPTION.......4-13
4.5.3 DSP BOARD CIRCUIT DESCRIPTION...............................................4-14
4.5.4 RF MODULATOR MODULE CIRCUIT DESCRIPTION.......................4-15
4.5.5 RF MODULATOR MODULE BLOCK DIAGRAM.................................4-15
4.5.6 RF MODULATOR MODULE BUS INTERFACE CIRCUITRY
(AUDIO BOARD - A1) ..........................................................................4-15
4.5.7 EXTERNAL AUDIO CONTROL ...........................................................4-16
4.5.8 INTERNAL & EXTERNAL MODULATION SUMMING.........................4-16
4.5.9 AUDIO HIGH/LOW INDICATION.........................................................4-16
4.5.10 % MODULATION LEVEL SET ATTENTUATOR .................................4-17
4.5.11 % MODULATION CENTERING & CALIBRATION
..............................4-17