HP 8568B Manual de usuario Pagina 216
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12. Time Base Adjustment (SN 2848A to 3217A05567)
15. On the Frequency Counter, select a 1 second gate time by
pressing,
t-1
1
@Y%YiK].
The Frequency Counter should
now display the difference between the frequency of the INPUT
A signal and 10.0 MHz with a resolution of 0.01 Hz (10
mHz).
Note
Do not use a metal adjustment tool to tune an oven-controlled
crystal oscillator (OCXO). The metal will conduct heat away from the
oscillator circuit, shifting the operating conditions.
16.
17.
18.
19.
Use a nonconductive adjustment tool to adjust the 18-turn FREQ
ADJ capacitor on the
A27A2
10 MHz Quartz Crystal Oscillator for
a Frequency Counter indication of 0.00 Hz. See Figure 3-55 for
the location of the
A27A2
10 MHz Quartz Crystal Oscillator.
RF Section (bottom
view)
Figure 3-55. Location of A27A2 Adjustment
On the Frequency Counter, select a 10 second gate time by
pressing,
[GATETIME)
10
C-1.
The Frequency Counter
should now display the difference between the frequency of the
INPUT A signal and 10.0 MHz with a resolution of 0.001 Hz (1
mHz).
Wait at least 2 gate periods for the Frequency Counter to settle,
and then adjust the FREQ ADJ capacitor on the
A27A2
10
MHz Quartz Crystal Oscillator for a stable Frequency Counter
indication of (0.000 + Frequency Correction Factor)
fO.O1O
Hz.
Replace the RF Section bottom cover and reconnect the short
jumper cable between the FREQ REFERENCE INT and EXT
connectors.
3-102 Adjustments
- HP Part No. 08568-90118 1
- Printed in USA 1
- September 1993 1
- Certification 3
- Warranty 3
- Assistance 4
- Safety Symbols 5
- General Safety 5
- Spectrum Analyzer 6
- Documentation 6
- Contents 7
- Contents-2 8
- Contents-3 9
- Contents-4 10
- Contents-6 12
- Contents-7 13
- Information 15
- Operation Verification 16
- Option 462 16
- Instruments 16
- Option 857 16
- General Information 1-3 17
- 2 to 22 18
- General Information 18
- HP85662-60088 20
- General Information 21
- Performance 23
- Equipment Required 24
- Test Record 24
- 1. Center 25
- Frequency Readout 25
- Performance Tests 2-5 27
- 2. Frequency Span 28
- 2-8 Performance Tests 30
- 3. Sweep Time 31
- Sweep Times 220 ms 32
- Performance Tests 33
- 2-12 Performance Tests 34
- 4. Resolution 35
- 2-14 Performance Tests 36
- 2-16 Performance Tests 38
- Performance Tests 2-17 39
- 6. Resolution 40
- Performance Tests 2-21 43
- 8. Frequency 44
- Response Test 44
- 2-24 Performance Tests 46
- to 20 MHz 47
- 50
- CLEAR-WRITE) 51
- 9. RF Gain Uncertainty Test 54
- 10. IF Gain 55
- 10 dB Gain Steps 56
- Performance Tests 2-35 57
- 2 dB Gain Steps 58
- 0.1 dB Gain Steps 59
- 2.38 Performance Tests 60
- 12. Amplitude 63
- 2-42 Performance Tests 64
- Linear Fidelity 65
- 2-44 Performance Tests 66
- 13. Average Noise 67
- 2-46 Performance Tests 68
- 14. Residual 69
- 15. Spurious 71
- Performance Tests 2-51 73
- Intermodulation 74
- Distortion 74
- GENERAToRS 75
- Performance Tests 2-55 77
- 16. Residual FM 78
- 2-58 Performance Tests 80
- Performance Tests 2-59 81
- 17. Line-Related 82
- Sidebands Tests 82
- Performance Tests 2-61 83
- 18. Calibrator 84
- 19. Fast Sweep 85
- Time Accuracy 85
- SEARCHJ@~EFZF),~ 86
- [FREQUENCY SPAN) to 0 Hz 86
- Performance Tests 2-65 87
- LO Output 88
- Amplitude Test 88
- 21. Frequency 89
- 1. Center 92
- ‘I&t 2. Frequency 93
- Span Accuracy Test 93
- Test 3. Sweep 94
- ‘I&t 4. Resolution 95
- (VIDEOBW] 96
- 6. Resolution 97
- Test 7. Input 98
- Attenuator 98
- 8. Frequency 99
- Test 9. RF Gain 100
- Uncertainty Test 100
- Test 10. IF Gain 101
- Performance Tests 102
- Step 24 103
- Step 23 103
- 11. Log Scale 104
- Switching 104
- Uncertainty 104
- Test 12. Amplitude 105
- Fidelity ‘I&t 105
- Test 13. Average 106
- Noise Level Test 106
- Test 14. Residual 107
- Responses Test 107
- 15. Spurious 108
- Responses 108
- Test 16. Residual 109
- Line-Related 110
- Sidebands Test 110
- Test 18. Calibrator 111
- Amplitude 111
- Accuracy ‘I&t 111
- Test 20 113
- Output Amplitude 113
- Test 21. Frequency 114
- Reference Error 114
- Warning 115
- Considerations 116
- Equipment 116
- Required 116
- Adjustment Tools 116
- Factory-Selected 117
- Components 117
- 3-4 Adjustments 118
- Adjustments 3-5 119
- Adjustments 3-7 121
- 3-8 Adjustments 122
- Adjustments 3-9 123
- Adjustments 124
- Adjustments 3-11 125
- 3-12 Adjustments 126
- Adjustments 3-13 127
- 3-14 Adjustments 128
- Adjustments 3-15 129
- Adjustments 3-17 131
- 3-18 Adjustments 132
- Adjustments 3-19 133
- Adjustments 3-21 135
- 3-22 Adjustments 136
- Adjustments 3-23 137
- 3-24 Adjustments 138
- 1. Low-Voltage 139
- Power Supply 139
- Adjustments 139
- 4. Connect the DVM to 140
- 6. Connect the DVM to 140
- RF Section 141
- 3-28 Adjustments 142
- Reference 143
- Description 143
- High-Voltage 144
- Adjustment Procedure 144
- Adjustments 3-3 1 145
- EXAMPLE: 146
- Focus and Intensity 147
- 3-34 Adjustments 148
- 60.00 v 149
- 3-36 Adjustments 150
- Adjustments 3-37 151
- 3-38 Adjustments 152
- Adjustments 3-41 155
- Discharge Procedure 157
- 3-44 Adjustments 158
- 3. Preliminary 159
- Adjustments (SN 159
- 3001A and Below) 159
- Procedure 160
- X and Y Deflection 160
- Amplifier Pulse 160
- Response Adjustments 160
- ~000uu000000u00ur 161
- Pulse Response of 164
- Control Gate Z 164
- Amplifier to BLANK 164
- 45.00 v 165
- 3004A and Above) 166
- 3-54 Adjustments 168
- Pulse Response of 21 171
- Input 22 171
- 3-58 Adjustments 172
- 4. Final Display 175
- 3-62 Adjustments 176
- Adjustments 3-63 177
- 3-64 Adjustments 178
- 5. Log Amplifier 179
- 5. Adjust 180
- 3.66 Adjustments 182
- 6. Video Processor 183
- Adjustments 3-7 1 185
- Related Performance 186
- 3-74 Adjustments 188
- Adjustments 3-75 189
- 3-76 Adjustments 190
- Adjustments 3-81 195
- 3-82 Adjustments 196
- A level should indicate 0.00 197
- Bandwidth 198
- Adjustments 3-85 199
- 20. Key in 203
- Adjustments 3-89 203
- Adjustments 3-91 205
- 11. Down/Up 206
- Converter 206
- Optional 207
- Down Converter Gain 208
- Adjustment 208
- 3-98 Adjustments 212
- 12. Time Base 213
- Adjustment (SN 213
- 3217A05567) 213
- (CLEAR-WRITE) 214
- MATH (SELECT/ENTER] 215
- 3-102 Adjustments 216
- Adjustments 3-l 09 223
- Second IF Amplifier 227
- 3-114 Adjustments 228
- Third Converter 229
- 18. Frequency 233
- Start-Up Time 234
- Slow Sweep 234
- DACS 1023.) 235
- START and STOP 236
- FM SPAN Adjustment 236
- Second LO Frequency 238
- Adjustments 3-125 239
- Second Converter 240
- Bandpass 240
- 42. Key in 241
- Adjustments 3-127 241
- 3-128 Adjustments 242
- Final Adjustments 243
- Voltage-Tuned 244
- Oscillator 244
- DACS Accuracy Check 245
- Positive Supply 245
- Adjustments 3-135 249
- Procedure 1 251
- 3-138 Adjustments 252
- Standard Procedure 254
- Alternate Procedure 255
- Adjustments 3-143 257
- 3-144 Adjustments 258
- 25. Digital Storage 259
- 3-146 Adjustments 260
- 0.000 V 261
- 0.000 v 261
- X and Y Offset and 262
- Gain Adjustments 262
- Final Graticule 263
- X and Y Expand 263
- Low-Noise DC 264
- Crystal Filter 265
- Bypass Network 265
- Configuration 265
- Resolution 267
- Bandwidth 267
- Accuracy Test 267
- 4. Impulse and 269
- Resolution 269
- Accuracy 269
- Option 462 271
- 4-8 Option 462 273
- Option 462 4-9 274
- Selectivity Test 275
- 4-12 Option 462 277
- Related Adjustment 281
- Specification 281
- I I I I I I I 282
- 4-18 Option 462 283
- Option 462 4-19 284
- 4-20 Option 462 285
- Option 462 4-21 286
- 4-22 Option 462 287
- Option 462 4-23 288
- Option 462 4-25 290
- A indication of 1.5 kHz while 291
- 9. Impulse 292
- A indication of 500 kHz while 293
- A indication of 150 kHz while 293
- A annotation indicates 1.00 294
- 12. Option 857 296
- Amplitude Fidelity 296
- 5-4 Option 857 298
- Option 857 5-5 299
- 5-6 Option 857 300
- Performance Test 301
- Test 12. Option 302
- 857 Amplitude 302
- Fidelity Test 302
- Option 857 5-9 303
- IF-Display Section 304
- Figure Index 304
- RF Section Figure 305
- RF Section, Top View 307
- and Above) 311
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