Aeroflex NAV 2000R Operation Manual page 10

SECTION
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
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
TABLE OF CONTENTS - NAV 2000R - REVISION 0 - JULY 26, 2007 - PAGE TC-2
Aeroflex Operation Manual
SECTION III
OPERATION (Con't)
SECTION IV
THEORY OF OPERATION
PAGE NUMBER