Test 11. Log Scale Switching Uncertainty Test . . . . 2-82

Test 12. Amplitude Fidelity Test . . . . . . . . . . . 2-83

Test 13. Average Noise Level Test . . . . . . . . . . 2-84

Test 14. Residual Responses Test . . . . . . . . . . . 2-85

Test 15. Spurious Responses Test . . . . . . . . . . 2-86

Test 16. Residual FM Test . . . . . . . . . . . . . . 2-87

Test 17. Line-Related Sidebands Test . . . . . . . . . 2-88

Test 18. Calibrator Amplitude Accuracy Test . . . . . 2-89

Test 19. Fast Sweep Time Accuracy Test (~20 ms) . . 2-90

Test 20. 1st LO Output Amplitude Test . . . . . . . . 2-91

Test 21. Frequency Reference Error Test . . . . . . . 2-92

3.Adjustments

Introduction . . . . . . . . . . . . . . . . . . . . .

3-l

Safety Considerations . . . . . . . . . . . . . . . . .

3-2

Equipment Required . . . . . . . . . . . . . . . . .

3-2

Adjustment Tools . . . . . . . . . . . . . . . . . . .

3-2

Factory-Selected

Components . . . . . . . . . . . . .

3-3

Related

Adjustments . . . . . . . . . . . . . . . . .

3-4

Location

of Test

Points and Adjustments . . . . . . . .

3-4

1.Low-Voltage Power Supply Adjustments . . . . . . 3-25

2.High-Voltage Adjustment (SN 3001A and Below) . . 3-29

2.High-Voltage Adjustment (SN 3004A and Above) . . 3-39

3.Preliminary Display Adjustments (SN 3001A and

Below) . . . . . . . . . . . . . . . . . . . . .

3-45

3. Preliminary Display Adjustments (SN 3004A and

 

Above) . . . . . . . . . . . . . . . . . . . . .

3-52

4.Final Display Adjustments (SN 3001A and Below) . 3-59

4.Final Display Adjustments (SN 3004A and Above) . 3-61

5.Log Amplifier Adjustments . . . . . . . . . . . . 3-65

6.Video Processor Adjustments . . . . . . . . . . . 3-69

7.3 MHz Bandwidth Filter Adjustments . . . . . . . 3-72

8.21.4 MHz Bandwidth Filter Adjustments . . . . . 3-77

9.3 dB Bandwidth Adjustments . . . . . . . . . . 3-84

10.Step Gain and 18.4 MHz Local Oscillator

Adjustments . . . . . . . . . . . . . . . . . . 3-87

11.Down/Up Converter Adjustments . . . . . . . . 3-92

12.Time Base Adjustment (SN 2840A and Below, also

32 17AO5568 and Above) . . . . . . . . . . . . . 3-95

12.Time Base Adjustment (SN 2848A to 3217A05567) 3-99

13.20 MHz Reference Adjustments . . . . . . . . . 3-103

14.249 MHz Phase Lock Oscillator Adjustments . . . 3-107

15.275 MHz Phase Lock Oscillator Adjustment . . . . 3-110

16.Second IF Amplifier and Third Converter

Adjustment . . . . . . . . . . . . . . . . . . . 3-112

17.Pilot Second IF Amplifier Adjustments . . . . . . 3-116

18.Frequency Control Adjustments . . . . . . . . . 3-119

19.Second Converter Adjustments . . . . . . . . . 3-123

20.50 MHz Voltage-Tuned Oscillator Adjustments . . 3-130

21. Slope Compensation Adjustments . . . . . . . . 3-133

22.Comb Generator Adjustments . . . . . . . . . . 3-136

23.Analog-To-Digital Converter Adjustments . . . . . 3-139

24.Track and Hold Adjustments . . . . . . . . . . . 3-142

25.Digital Storage Display Adjustments . . . . . . . 3-145 Low-Noise DC Supply . . . . . . . . . . . . . . . . 3-150

Contents-2