GEX-P900DAB
Equipment required:
• Head unit
• SG: Capable of outputting sine waves up to 1.5 GHz (no modulation function is required)
• DMM
• Adjustment stick (with flat tip)
1. VCO ADJUSTMENT
1) Connect the GEX-P900DAB to a DC regulated power supply. Connect the head unit and the GEX-P900DAB with an
IPBUS cable.
2) Set the power to ON, and enter DAB Service mode.
3) Set frequency to 13 F.
4) Check R556 on the side where P1 is located (the side not in contact with D551) with DMM (1) so that VT (tuning
voltage) can be measured. Adjust air-core coil (L553) so that VT is 7.00 V.
5) Set frequency to 5 A, and confirm that VT is within the range from 1.2 to 1.7 V.
L473
Pin 7
DMM(2)
L503
L475
L477
L505
L507
L553
R556
IC391
DMM(1)
MAIN UNIT
35
6. ADJUSTMENT
-
Connection Diagram
Summary of Contents for CRT2193
Page 4: ...4 GEX P900DAB 2 2 EXTERIOR ...
Page 8: ...8 GEX P900DAB DIGITAL SECTION A 3 3 A 1 2 3 4 B C D 1 2 3 4 A a A b A a 1 3 ...
Page 9: ...9 GEX P900DAB SYSTEM CONTROL RF SECTION A 2 3 5 6 7 8 A B C D 5 6 7 8 A a A b A a 1 3 ...
Page 15: ...15 GEX P900DAB L BAND DOWN CONVERTOR 5 6 7 8 A B C D 5 6 7 8 A a A b A a 2 3 ...
Page 17: ...17 GEX P900DAB DIGITAL SECTION A 3 3 A 1 3 5 6 7 8 A B C D 5 6 7 8 A a A b A b 2 3 ...
Page 20: ...20 GEX P900DAB DAB DECODER RF SECTION A 2 3 A 1 2 3 4 B C D 1 2 3 4 A a A b A a 3 3 ...
Page 23: ...23 GEX P900DAB SELECTOR DAC OPT IN OUT A 1 3 5 6 7 8 A B C D 5 6 7 8 A a A b A b 3 3 ...
Page 24: ...A MAIN UNIT 24 GEX P900DAB A 1 2 3 4 B C D 1 2 3 4 4 PCB CONNECTION DIAGRAM 4 1 MAIN UNIT A ...
Page 26: ...26 GEX P900DAB A 1 2 3 4 B C D 1 2 3 4 A MAIN UNIT A ...
Page 27: ...27 GEX P900DAB 5 6 7 8 A B C D 5 6 7 8 SIDE B A ...
Page 42: ...42 GEX P900DAB AK4321VFP TC74HC126AF TC74HCT541AF ...