Agilent Technologies 75000 Series C, E1445A Skew DAC Adjustment Procedure

Skew DAC Adjustment Procedure

Description

This procedure compensates for time delays between the AFG’s two DACs.

The skew setting which produces the lowest se co nd ha r monic amplitude is

found and loaded into non-volatile memory.

Equipment Setup

•Connect the equipment as shown in Figure 3-3

•Set up the Spectrum Analyzer:

Center Freque ncy = 8 MHz

Frequency Span = 3.2 kHz

Adjustment Procedure

1. Reset the AFG:

*RST

Figure 3-3. Skew DAC Adjustment Setup

Agilent E1445A Service Manual Adjustments 109

Contents

Main Page Contents Agilent E1445A Se rvice Manual Contents 1 2 Contents Agilent E1 44 5A Service Manual Certification Agilent E1445A S ervice Manual 3 Warranty Limitation Of Warranty Exclusive Remedies Notice 4 Agilent E1445A Serv i ce Manual Printing History Safety Symbols WARNING CAUTION DECLARATION OF CONFORMITY Page Page Page Chapter 1 General Information Introduction Agilent E1445A Service Manual General Information 9 Safety Considerations Warnings and Cautions 10 General Information Agilent E1445A Service Manual Agilent E1445A Service Manual General Information 11 Page Shipping Guidelines Sales and Support Office or Service Center. Agilent E1445A Service Manual General Information 13 Environment AFG Description Serial Numbers Options Specifications Recommended Test Equipment Agilent E1445A Service Manual General Information 15 Page Chapter 2 Verification Tests Introduction Agilent E1445A Service Manual Verification Tests 17 Test Conditions/ Procedures Performance Test Record Functional Verification 18 Verification Te sts Agilent E1445A Serv ice Manual Functional Verification: Self-Test Agilent E1445A Service Manual Verification Tests 19 Functional Verification: Ref In/Marker Out Test 20 Verification Te sts Agilent E1445A Serv ice Manual Functional Verification: Start Arm In Test Agilent E1445A Service Manual Verification Tests 21 Functional Verification: Start Arm In Test (contd) Functional Verification: Gate In Test Functional Verifi cation: Gate In Test (contd) 24 Verification Te sts Agilent E1445A Serv ice Manual Functional Verification: Output Relay Test Agilent E1445A Service Manual Verification Tests 25 26 Verification Te sts Agilent E1445A Serv ice Manual Agilent E1445A Service Manual Verification Tests 27 28 Verification Te sts Agilent E1445A Serv ice Manual Agilent E1445A Service Manual Verification Tests 29 30 Verification Te sts Agilent E1445A Serv ice Manual Page Operation Verification Performance Verification 32 Verification Te sts Agilent E1445A Serv ice Manual Test 2-1: DC Zeros 34 Verification Te sts Agilent E1445A Serv ice Manual Agilent E1445A Service Manual Verification Tests 35 36 Verification Te sts Agilent E1445A Serv ice Manual Agilent E1445A Service Manual Verification Tests 37 Test 2-2: DC Accuracy 38 Verification Te sts Agilent E1445A Serv ice Manual Test 2-2: DC Accuracy (contd) This program performs the DC Accuracy test. Agilent E1445A Service Manual Verification Tests 39 Test 2-2: DC Accuracy (contd) 40 Verification Te sts Agilent E1445A Serv ice Manual Test 2-3: DC Offset Agilent E1445A Service Manual Verification Tests 41 Perform steps 5 - 7 for each offset listed in Table 2-3: 42 Verification Te sts Agilent E1445A Serv ice Manual where <amplitude> is the value specified in Table 2-3. where <offset> is the value specified in Table 2-3. This program performs the DC Offset Test. Agilent E1445A Service Manual Verification Tests 43 44 Verification Te sts Agilent E1445A Serv ice Manual Test 2-4: AC Accuracy Agilent E1445A Service Manual Verification Tests 45 where <amplitude> is the value specified in Table 2-4. 46 Verification Te sts Agilent E1445A Serv ice Manual This program performs the AC Accuracy Tes t. Agilent E1445A Service Manual Verification Tests 47 48 Verification Te sts Agilent E1445A Serv ice Manual Test 2-5: AC Flatness - 250 kHz Filter Test 2-5: AC Flatness - 250 kHz Filter (contd) 50 Verification Te sts Agilent E1445A Serv ice Manual Test 2-5: AC Flatness - 250 kHz Filter (contd) * Error relative to 1 kHz Agilent E1445A Service Manual Verification Tests 51 Test 2-6: AC Flatness - 10 MHz Filter 52 Verification Te sts Agilent E1445A Serv ice Manual Agilent E1445A Service Manual Verification Tests 53 54 Verification Te sts Agilent E1445A Serv ice Manual * Error relative to 1 kHz Agilent E1445A Service Manual Verification Tests 55 Test 2-7: Frequency Accuracy Agilent E1445A Service Manual Verification Tests 57 *Add aging rate of 20 ppm/year 58 Verification Te sts Agilent E1445A Serv ice Manual This program performs the Frequency Accuracy Test. Agilent E1445A Service Manual Verification Tests 59 Test 2-8: Duty Cycle 60 Verification Te sts Agilent E1445A Serv ice Manual Agilent E1445A Service Manual Verification Tests 61 This program performs the Duty Cycle Test. 62 Verification Te sts Agilent E1445A Serv ice Manual Agilent E1445A Service Manual Verification Tests 63 Test 2-9: Total Harmonic Distortion Agilent E1445A Service Manual Verification Tests 65 This program performs the Total Harmonic Distortion Test. 66 Verification Te sts Agilent E1445A Serv ice Manual Agilent E1445A Service Manual Verification Tests 67 68 Verification Te sts Agilent E1445A Serv ice Manual Test 2-10: Spurious/Non-Harmonic Distortion Agilent E1445A Service Manual Verification Tests 69 Perform steps 3 and 4 for each frequency range listed in Table 2-10: 70 Verification Te sts Agilent E1445A Serv ice Manual values listed in Table 2-10. amplitude of the fundamental (-5dBm) from the read ing a nd r e co rd the result in Table 2-11: This program performs the Spurious/Non-harmonic Tes t. Agilent E1445A Service Manual Verification Tests 71 72 Verification Te sts Agilent E1445A Serv ice Manual Performance Test Record AFG Test Limits Agilent E1445A Service Manual Verification Tests 73 Measurement Uncertainty Page Table 2-11. Performance Test Record for the Agilent E1445A (Pag e 1 of 7) Agilent E1445A Service Manual Verification Tests 75 Table 2-11. Performance Test Record for the Agilent E1445A ( Page 2 of 7) 76 Verification Te sts Agilent E1445A Serv ice Manual Table 2-11. Performance Test Record for the Agilent E1445A (Pag e 3 of 7) Agilent E1445A Service Manual Verification Tests 77 Table 2-11. Performance Test Record for the Agilent E1445A (Pag e 4 of 7) 78 Verification Te sts Agilent E1445A Serv ice Manual Table 2-11. Performance Test Record for the Agilent E1445A (Pag e 5 of 7) Agilent E1445A Service Manual Verification Tests 79 Table 2-11. Performance Test Record for the Agilent E1445A (Pag e 6 of 7) 80 Verification Te sts Agilent E1445A Serv ice Manual Table 2-11. Performance Test Record for the Agilent E1445A (Pag e 7 of 7) Agilent E1445A Service Manual Verification Tests 81 Page Chapter 3 Adjustments Introduction Agilent E1445A Service Manual Adjustments 83 Required Equipment Recommended Environment Calibration Commands (contd) 84 Adjustments A gilent E1445A Service Manual Calibration Commands (contd) Agilent E1445A Service Manual Adjustments 85 Defeating Calibration Security 86 Adjustments A gilent E1445A Service Manual DC Adjustment Procedure Agilent E1445A Service Manual Adjustments 87 88 Adjustments A gilent E1445A Service Manual Agilent E1445A Service Manual Adjustments 89 90 Adjustments A gilent E1445A Service Manual Agilent E1445A Service Manual Adjustments 91 92 Adjustments A gilent E1445A Service Manual AC Flatness Adjustment Procedure - 250 kHz Filter Preliminary Procedure Agilent E1445A Service Manual Adjustments 93 AC Flatness Adjustment Procedure - 10 MHz Filter Preliminary Procedure 94 Adjustments A gilent E1445A Service Manual AC Flatness Adjustment Procedure - 10 MHz Filter (contd) 96 Adjustments A gilent E1445A Service Manual Agilent E1445A Service Manual Adjustments 97 98 Adjustments A gilent E1445A Service Manual Agilent E1445A Service Manual Adjustments 99 100 Adjustments Agilent E1445A Ser vice Manual Agilent E1445A Service Manual Adjustments 101 102 Adjustments Agilent E1445A Ser vice Manual Agilent E1445A Service Manual Adjustments 103 104 Adjustments Agilent E1445A Ser vice Manual Agilent E1445A Service Manual Adjustments 105 106 Adjustments Agilent E1445A Ser vice Manual Agilent E1445A Service Manual Adjustments 107 108 Adjustments Agilent E1445A Ser vice Manual Skew DAC Adjustment Procedure Adjustment Procedure (contd) 110 Adjustments Agilent E1445A Ser vice Manual Agilent E1445A Service Manual Adjustments 111 112 Adjustments Agilent E1445A Ser vice Manual Agilent E1445A Service Manual Adjustments 113 114 Adjustments Agilent E1445A Ser vice Manual Agilent E1445A Service Manual Adjustments 115 Page Chapter 4 Replaceable Parts Introduction Replaceable Parts List Table 4-1. Agilent E1445A Replaceable Parts 118 Replaceable Parts Agilent E1445A Service Manual Reference Designator Part Code Mfr. Part Number Qty Part Description Mfr. Number Agilent E1445A Service Manual Replaceable Parts 119 Table 4-3. Agilent E1445A Code List of Manufacturers Page Chapter 5 Service Introduction Agilent E1445A Service Manual Service 121 Equipment Required Service Aids Troubleshooting Techniques Identifying the Problem 122 Service Agilent E1445A Service Manual Operator Errors Catastrophic Failure Disassembly Page Repair/ Maintenance Guidelines ESD Precautions Agilent E1445A Service Manual Service 125 Soldering Printed Circuit Boards Post-Repair Safety Checks Page Page *E1445-90011*