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Summary of Contents for Dukane 42A12D
- Page 1 TECHNICAL MANUAL ULTRASONIC TEST SET MODEL 42A12D JUNE 15, 1998 REV 00 SEACOM DIVISION DUKANE CORPORATION ST. CHARLES, ILLINOIS 60174 PHONE: 630/584-2300 FAX: 630/584-5154 DOCUMENT NO. 03-TM-0038 1998 DUKANE CORPORATION 199806-08SC...
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Page 2: Table Of Contents
Ultrasonic Test Set Model 42A12D... Figure 1.2. Test Set Block Diagram... Figure 3.1 Tuning Components... Figure 3.2. Schematic Ultrasonic Test Set Model 42A12D... Table 1.1. Specifications 42A12D Ultrasonic Test Set... 03-TM-0038 REV 00 PAGE i of i Table Of Contents Figures... -
Page 3: I General Information
ANSI Y14.15 and MIL-STD-12, respectively. 1.2. GENERAL DESCRIPTION 1.2.1. FUNCTION. The 42A12D is a battery operated het- erodyne type receiver tunable over the ultrasonic frequency range of 30 to 45 kHz. The test set was designed primarily as a self-contained, hand-held functional tester for testing underwater acoustic beacons. -
Page 4: Block Diagram
1.2.3. BLOCK DIAGRAM. Figure 1.2. is a block diagram and Figure 3.1. is the schematic diagram of the test set. The microphone detects a beacon signal which is amplified and fed into the mixer. The tunable oscillator frequency is also fed into the mixer. -
Page 5: Operation
2.1. OPERATION A. Turn the GAIN control to a fully clockwise position. A pronounced background noise should be present. Lack of noise may indicate a dead battery. Should this occur, replace battery before resuming operational testing. See Mainte- nance Section 3.2. B. -
Page 6: Maintenance
3.3. TEST SET TUNING The following test equipment and procedures should be fol- lowed to tune and adjust the frequency range of the 42A12D Test Set. 3.3.1. TEST EQUIPMENT A. Test Oscillator which is accurate at 30 kHz, 37.5 kHz and 45 kHz and provides sev- eral volts output. -
Page 7: Adjusting Frequency Range
R 23 100K Figure 3.2 Schematic Ultrasonic Test Set Model 42A12D 3.4. TEST SET SCHEMATIC DIAGRAM. Figure 3.2. is the schematic diagram for the 42A12D Ultra- sonic Test Set. 3.5. MAINTENANCE AND REPLACEMENT PARTS. A. Tuning or Gain 1 control knob...P/N 809-440-0004 B.
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