SECTION I. INTRODUCTION - TM-11-6625-3087-24P0005Explanation of Columns (Sections II and III)Source Code - TM-11-6625-3087-24P0007Maintenance Code - TM-11-6625-3087-24P0008Recoverability Code.FSCM (Column (3)).Description and Usable on Code (UOC) (Column (5))Explanation of Columns (Section IV) - TM-11-6625-3087-24P0012Special Information - TM-11-6625-3087-24P0013How to locate repair parts-continued - TM-11-6625-3087-24P0014Figure 1. Frequency Selective Level Meter, AN/USM-490 (Sheet 1 of 11).Figure 1. Frequency Selective Level Meter, AN/USM-490 (Sheet 2 of 11).Figure 1. Frequency Selective Level Meter, AN/USM-490 (Sheet 3 of 11).Figure 1. Frequency Selective Level Meter, AN/USM-490 (Sheet 4 of 11).Figure 1. Frequency Selective Level Meter, AN/USM-490 (Sheet 5 of 11).Figure 1. Frequency Selective Level Meter, AN/USM-490 (Sheet 6 of 11).Figure 1. Frequency Selective Level Meter, AN/USM-490 (Sheet 7 of 11).Figure 1. Frequency Selective Level Meter, AN/USM-490 (Sheet 8 of 11).Figure 1. Frequency Selective Level Meter, AN/USM-490 (Sheet 9 of 11).Figure 1. Frequency Selective Level Meter, AN/USM-490 (Sheet 10 of 11).Figure 1. Frequency Selective Level Meter, AN/USM-490 (Sheet 11 of 11).GROUP 00 FREQUENCY SELECTIVE LEVEL METER, AN/USM-490GROUP 00 FREQUENCY SELECTIVE LEVEL METER, AN/USM-490-continued - TM-11-6625-3087-24P0028GROUP 00 FREQUENCY SELECTIVE LEVEL METER, AN/USM-490-continued - TM-11-6625-3087-24P0029GROUP 00 FREQUENCY SELECTIVE LEVEL METER, AN/USM-490-continued - TM-11-6625-3087-24P0030GROUP 00 FREQUENCY SELECTIVE LEVEL METER, AN/USM-490-continued - TM-11-6625-3087-24P0031Figure 2. Input Multiplexer Circuit Card Assembly (Sheet 1 of 2).Figure 2. Input Multiplexer Circuit Card Assembly (Sheet 2 of 2).GROUP 01 INPUT MULTIPLEXER CIRCUIT CARD ASSEMBLY (A1)GROUP 01 INPUT MULTIPLEXER CIRCUIT CARD ASSEMBLY (A1)-continuedFigure 3. Input Amplifier Circuit Card Assembly (Sheet 1 of 2).Figure 3. Input Amplifier Circuit Card Assembly (Sheet 2 of 2).GROUP 02 INPUT AMPLIFIER CIRCUIT CARD ASSEMBLY (A2)GROUP 02 INPUT AMPLIFIER CIRCUIT CARD ASSEMBLY (A2)-continued - TM-11-6625-3087-24P0040GROUP 02 INPUT AMPLIFIER CIRCUIT CARD ASSEMBLY (A2)-continued - TM-11-6625-3087-24P0041Figure 4. Broadband Power/CAL/Overload Circuit Card Assembly (Sheet 1 of 2).Figure 4. Broadband Power/CAL/Overload Circuit Card Assembly (Sheet 2 of 2).GROUP 03 BROADBAND POWER/CAL/OVER-LOAD CIRCUIT CARD ASSEMBLY (A4)GROUP 03 BROADBAND POWER/CAL/OVER-LOAD CIRCUIT CARD ASSEMBLY (A4)-continued - TM-11-6625-3087-24P0046GROUP 03 BROADBAND POWER/CAL/OVER-LOAD CIRCUIT CARD ASSEMBLY (A4)-continued - TM-11-6625-3087-24P0047Figure 5. Input Mixer Circuit Card Assembly (Sheet 1 of 2)Figure 5. Input Mixer Circuit Card Assembly (Sheet 2 of 2).GROUP 04 INPUT MIXER CIRCUIT CARD ASSEMBLY (A5)GROUP 04 INPUT MIXER CIRCUIT CARD ASSEMBLY (A5)-continuedFigure 6. Second Mixer Circuit Card Assembly (Sheet 1 of 2).Figure 6. Second Mixer Circuit Card Assembly (Sheet 2 of 2).GROUP 05 SECOND MIXER CIRCUIT CARD ASSEMBLY (A10)GROUP 05 SECOND MIXER CIRCUIT CARD ASSEMBLY (A10)-continuedFigure 7. Second LO Circuit Card Assembly (Sheet 1 of 2).Figure 7. Second LO Circuit Card Assembly (Sheet 2 of 2).GROUP 06 SECOND LO CIRCUIT CARD ASSEMBLY (A11)GROUP 06 SECOND LO CIRCUIT CARD ASSEMBLY (A11)-continuedFigure 8. Tracking Output Circuit Card Assembly (Sheet 1 of 2).Figure 8. Tracking Output Circuit Card Assembly (Sheet 2 of 2).GROUP 07 TRACKING OUTPUT CIRCUIT CARD ASSEMBLY (A15)GROUP 07 TRACKING OUTPUT CIRCUIT CARD ASSEMBLY (A15)-continuedFigure 9. 10 MHz Frequency REF Circuit Card Assembly (Sheet 1 of 2).Figure 9. 10 MHz Frequency REF Circuit Card Assembly (Sheet 2 of 2).GROUP 08 10 MHZ FREQUENCY REF CIRCUIT CARD ASSEMBLY (A16)Figure 10. IF Filter Circuit Card Assembly (Sheet 1 of 2).Figure 10. IF Filter Circuit Card Assembly (Sheet 2 of 2).GROUP 09 IF FILTER CIRCUIT CARD ASSEMBLY (A20)GROUP 09 IF FILTER CIRCUIT CARD ASSEMBLY (A20)-continuedFigure 11. IF Gain/DET Circuit Card Assembly (Sheet 1 of 2).Figure 11. IF Gain/DET Circuit Card Assembly (Sheet 2 of 2).GROUP 10 IF GAIN/DET CIRCUIT CARD ASSEMBLY (A21)GROUP 10 IF GAIN/DET CIRCUIT CARD ASSEMBLY (A21)-continued - TM-11-6625-3087-24P0076GROUP 10 IF GAIN/DET CIRCUIT CARD ASSEMBLY (A21)-continued - TM-11-6625-3087-24P0077Figure 12. Analog to Digital Converter Circuit Card Assembly (Sheet 1 of 2).Figure 12. Analog to Digital Converter Circuit Card Assembly (Sheet 2 of 2).GROUP 11 ANALOG TO DIGITAL CONVERTER CIRCUIT CARD ASSEMBLY (A22)GROUP 11 ANALOG TO DIGITAL CONVERTER CIRCUIT CARD ASSEMBLY (A22)-continuedFigure 13. Frequency Reference Circuit Card Assembly (Sheet 1 of 2).Figure 13. Frequency Reference Circuit Card Assembly (Sheet 2 of 2).GROUP 12 FREQUENCY REFERENCE CIRCUIT CARD ASSEMBLY (A40)GROUP 12 FREQUENCY REFERENCE CIRCUIT CARD ASSEMBLY (A40)-continuedFigure 14. Step Loop Circuit Card Assembly (Sheet 1 of 2).Figure 14. Step Loop Circuit Card Assembly (Sheet 2 of 2).GROUP 13 STEP LOOP CIRCUIT CARD ASSEMBLY (A50)GROUP 13 STEP LOOP CIRCUIT CARD ASSEMBLY (A50)-continuedFigure 15. Controller Circuit Card Assembly (Sheet 1 of 2).Figure 15. Controller Circuit Card Assembly (Sheet 2 of 2).GROUP 14 CONTROLLER CIRCUIT CARD ASSEMBLY (A60)GROUP 14 CONTROLLER CIRCUIT CARD ASSEMBLY (A60)-continuedFigure 16. Impairments B Circuit Card Assembly (Sheet 1 of 4).Figure 16. Impairments B Circuit Card Assembly (Sheet 2 of 4).Figure 16. Impairments B Circuit Card Assembly (Sheet 3 of 4).Figure 16. Impairments B Circuit Card Assembly (Sheet 4 of 4).GROUP 15 IMPAIRMENTS B CIRCUIT CARD ASSEMBLY (70)GROUP 15 IMPAIRMENTS B CIRCUIT CARD ASSEMBLY (70)-continued - TM-11-6625-3087-24P0100GROUP 15 IMPAIRMENTS B CIRCUIT CARD ASSEMBLY (70)-continued - TM-11-6625-3087-24P0101GROUP 15 IMPAIRMENTS B CIRCUIT CARD ASSEMBLY (70)-continued - TM-11-6625-3087-24P0102Figure 17. Switch/Display Circuit Card Assembly (Sheet 1 of 3).Figure 17. Switch/Display Circuit Card Assembly (Sheet 2 of 3).Figure 17. Switch/Display Circuit Card Assembly (Sheet 3 of 3).GROUP 16 SWITCH/DISPLAY CIRCUIT CARD ASSEMBLY (A98)Figure 18. Motherboard Circuit Card Assembly (Sheet 1 of 5).Figure 18. Motherboard Circuit Card Assembly (Sheet 2 of 5).Figure 18. Motherboard Circuit Card Assembly (Sheet 3 of 5).Figure 18. Motherboard Circuit Card Assembly (Sheet 4 of 5).Figure 18. Motherboard Circuit Card Assembly (Sheet 5 of 5).GROUP 17 MOTHERBOARD CIRCUIT CARD ASSEMBLY (A99)NATIONAL STOCK NUMBER AND PART NUMBER INDEX - TM-11-6625-3087-24P0115NATIONAL STOCK NUMBER INDEX-continued - TM-11-6625-3087-24P0116NATIONAL STOCK NUMBER INDEX-continued - TM-11-6625-3087-24P0117NATIONAL STOCK NUMBER INDEX-continued - TM-11-6625-3087-24P0118NATIONAL STOCK NUMBER INDEX-continued - TM-11-6625-3087-24P0119NATIONAL STOCK NUMBER INDEX-continued - TM-11-6625-3087-24P0120NATIONAL STOCK NUMBER INDEX-continued - TM-11-6625-3087-24P0121NATIONAL STOCK NUMBER INDEX-continued - TM-11-6625-3087-24P0122NATIONAL STOCK NUMBER INDEX-continued - TM-11-6625-3087-24P0123NATIONAL STOCK NUMBER INDEX-continued - TM-11-6625-3087-24P0124NATIONAL STOCK NUMBER INDEX-continued - TM-11-6625-3087-24P0125NATIONAL STOCK NUMBER INDEX-continued - TM-11-6625-3087-24P0126NATIONAL STOCK NUMBER INDEX-continued - TM-11-6625-3087-24P0127NATIONAL STOCK NUMBER INDEX-continued - TM-11-6625-3087-24P0128NATIONAL STOCK NUMBER INDEX-continued - TM-11-6625-3087-24P0129PART NUMBER INDEXPART NUMBER INDEX-continued - TM-11-6625-3087-24P0131PART NUMBER INDEX-continued - TM-11-6625-3087-24P0132PART NUMBER INDEX-continued - TM-11-6625-3087-24P0133PART NUMBER INDEX-continued - TM-11-6625-3087-24P0134PART NUMBER INDEX-continued - TM-11-6625-3087-24P0135PART NUMBER INDEX-continued - TM-11-6625-3087-24P0136PART NUMBER INDEX-continued - TM-11-6625-3087-24P0137PART NUMBER INDEX-continued - TM-11-6625-3087-24P0138PART NUMBER INDEX-continued - TM-11-6625-3087-24P0139PART NUMBER INDEX-continued - TM-11-6625-3087-24P0140PART NUMBER INDEX-continued - TM-11-6625-3087-24P0141PART NUMBER INDEX-continued - TM-11-6625-3087-24P0142PART NUMBER INDEX-continued - TM-11-6625-3087-24P0143PART NUMBER INDEX-continued - TM-11-6625-3087-24P0144PART NUMBER INDEX-continued - TM-11-6625-3087-24P0145PART NUMBER INDEX-continued - TM-11-6625-3087-24P0146PART NUMBER INDEX-continued - TM-11-6625-3087-24P0147PART NUMBER INDEX-continued - TM-11-6625-3087-24P0148PART NUMBER INDEX-continued - TM-11-6625-3087-24P0149PART NUMBER INDEX-continued - TM-11-6625-3087-24P0150PART NUMBER INDEX-continued - TM-11-6625-3087-24P0151PART NUMBER INDEX-continued - TM-11-6625-3087-24P0152PART NUMBER INDEX-continued - TM-11-6625-3087-24P0153PART NUMBER INDEX-continued - TM-11-6625-3087-24P0154PART NUMBER INDEX-continued - TM-11-6625-3087-24P0155PART NUMBER INDEX-continued - TM-11-6625-3087-24P0156PART NUMBER INDEX-continued - TM-11-6625-3087-24P0157PART NUMBER INDEX-continued - TM-11-6625-3087-24P0158PART NUMBER INDEX-continued - TM-11-6625-3087-24P0159PART NUMBER INDEX-continued - TM-11-6625-3087-24P0160PART NUMBER INDEX-continued - TM-11-6625-3087-24P0161PART NUMBER INDEX-continued - TM-11-6625-3087-24P0162TM-11-6625-3087-24P Frequency Selective Level Meter AN/USM-490 Manual