Contents
1. Preface
Edition/Print Date . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Safety Summary. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Product Markings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
CERTIFICATION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Agilent Technologies Warranty Statement for Commercial Products . . . . . . . . . . . . . . . . . . 18
ASSISTANCE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Service and Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Regional Sales Offices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Declaration of Conformity 8924C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Declaration of Conformity 8924E . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Manufacturer’s Declaration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Herstellerbescheinigung . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 6
Power Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
2. Introduction
Test Set Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Troubleshooting Strategy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Repair Process . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Calibration and Performance Verification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Hardware and Firmware Enhancements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
3. Troubleshooting
How to Troubleshoot the Test Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
More About Step 1- Run the Power-Up Diagnostic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
More About Step 2- Run the Functional Diagnostics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Step 3- Verify Test Set Functioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Further Isolating RF Failures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75
4. Repair
Before You Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Downloading Calibration Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Locating Assemblies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
5. Periodic Adjustments
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
6. Functional Verification
Purpose . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 126
Process Efficiency Recommendations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 127
Analog Loopback . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 128
Wideband Sweep . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 130
Channel Power Loopback Verification Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 131
ROM-Based Diagnostics and Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 132
Channel Power Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 134
CDMA Mobile Phone Functional Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 135
Functional Verification Test Record . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 137
1
Contents
7. 8924C Performance Verification
Verifying Performance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .140
RF Gen FM Distortion
Performance Test 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .142
RF Gen FM Accuracy
Performance Test 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .144
RF Gen FM Flatness
Performance Test 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .146
RF Gen Residual FM
Performance Test 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .153
RF Gen Duplex Output High Level Accuracy
Performance Test 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .157
RF Gen Duplex Output Low Level Accuracy
Performance Test 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .159
RF Gen RF IN/OUT Level Accuracy
Performance Test 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .161
RF Gen Harmonics Spectral Purity
Performance Test 8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .164
RF Gen Spurious Spectral Purity
Performance Test 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .166
AF Gen AC Level Accuracy
Performance Test 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .168
AF Gen DC Level Accuracy
Performance Test 11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .170
AF Gen Residual Distortion
Performance Test 12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .172
AF Gen Frequency Accuracy
Performance Test 13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .174
AF Analyzer AC Voltage Accuracy
Performance Test 14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .176
AF Analyzer Residual Noise
Performance Test 15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .178
AF Analyzer Distortion, SINAD, and SNR Accuracy
Performance Test 16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .180
AF Analyzer DC Level Accuracy
Performance Test 17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .182
AF Analyzer Frequency Accuracy to 100 kHz
Performance Test 18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .184
AF Analyzer Frequency Accuracy at 400 kHz
Performance Test 19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .186
Oscilloscope
Performance Test 20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .188
RF Analyzer Level Accuracy
Performance Test 21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .190
RF Analyzer FM Accuracy
Performance Test 22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .194
RF Analyzer FM Distortion
Performance Test 23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .197
RF Analyzer FM Bandwidth
2
Contents
Performance Test 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200
RF Analyzer Residual FM
Performance Test 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204
Spectrum Analyzer Image Rejection
Performance Test 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206
CDMA Generator RF In/Out Amplitude Level Accuracy
Performance Test 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 209
CDMA Generator Duplex Out Amplitude Level Accuracy
Performance Test 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 211
CDMA Generator Adjacent Channel Spectral Purity
Performance Test 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 215
CDMA Analyzer Average Power Level Accuracy
Performance Test 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 217
CDMA Analyzer Calibrated Tuned Channel Power Level Accuracy Perfo rmance Test 31 . 220
CDMA Analyzer Relative Tuned Channel Power Level Accuracy Performance Test 32 . . . 223
8. 8924E Performance Verification
Verifying Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 228
RF Gen FM Distortion
Performance Test 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 230
RF Gen FM Accuracy
Performance Test 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 232
RF Gen FM Flatness
Performance Test 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 234
RF Gen Residual FM
Performance Test 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 236
RF Gen Duplex Output High Level Accuracy
Performance Test 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 238
RF Gen Duplex Output Low Level Accuracy
Performance Test 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 240
RF Gen RF IN/OUT Level Accuracy
Performance Test 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 242
RF Gen Harmonics Spectral Purity
Performance Test 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 245
RF Gen Spurious Spectral Purity
Performance Test 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 247
AF Gen AC Level Accuracy
Performance Test 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 249
AF Gen Residual Distortion
Performance Test 12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 251
AF Gen Frequency Accuracy
Performance Test 13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 253
AF Analyzer AC Voltage Accuracy
Performance Test 14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 255
AF Analyzer Residual Noise
Performance Test 15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 257
AF Analyzer Distortion, SINAD, and SNR Accuracy
Performance Test 16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 259
AF Analyzer DC Level Accuracy
3
Contents
Performance Test 17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .261
AF Analyzer Frequency Accuracy to 100 kHz
Performance Test 18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .263
AF Analyzer Frequency Accuracy at 400 kHz
Performance Test 19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .265
Oscilloscope
Performance Test 20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .267
RF Analyzer Level Accuracy
Performance Test 21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .269
RF Analyzer FM Accuracy
Performance Test 22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .273
RF Analyzer FM Distortion
Performance Test 23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .276
RF Analyzer FM Bandwidth
Performance Test 24 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .279
RF Analyzer Residual FM
Performance Test 25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .282
Spectrum Analyzer Image Rejection
Performance Test 26 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .284
CDMA Generator RF In/Out Amplitude Level Accuracy
Performance Test 27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .286
CDMA Generator Duplex Out Amplitude Level Accuracy
Performance Test 28 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .288
CDMA Generator Adjacent Channel Spectral Purity
Performance Test 29 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .290
CDMA Analyzer Average Power Level Accuracy
Performance Test 30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .292
CDMA Analyzer Calibrated Tuned Channel Power Level Accuracy Performance Test 31. .296
CDMA Analyzer Relative Tuned Channel Power Level Accuracy Performance Test 32. . . .299
9. 8924C Performance Test Records
8924C RF Communications Test Set. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .304
RF Gen FM Distortion
Performance Test 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .305
RF Gen FM Accuracy
Performance Test 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .307
RF Gen FM Flatness
Performance Test 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .308
RF Gen Residual FM
Performance Test 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .309
RF Gen Duplex Output High Level Accuracy
Performance Test 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .310
RF Gen Duplex Output Low Level Accuracy
Performance Test 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .311
RF Gen RF IN/OUT Level Accuracy
Performance Test 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .314
RF Gen Harmonics Spectral Purity
Performance Test 8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .317
RF Gen Spurious Spectral Purity
4
Contents
Performance Test 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 320
AF Gen AC Level Accuracy
Performance Test 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 322
AF Gen DC Level Accuracy
Performance Test 11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 323
AF Gen Residual Distortion
Performance Test 12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 324
AF Gen Frequency Accuracy
Performance Test 13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 325
AF Analyzer AC Voltage Accuracy
Performance Test 14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 326
AF Analyzer Residual Noise
Performance Test 15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 327
AF Analyzer Distortion, SINAD and SNR Accuracy
Performance Test 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 328
AF Analyzer DC Level Accuracy
Performance Test 17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 329
AF Analyzer Frequency Accuracy to 100 kHz
Performance Test 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 330
AF Analyzer Frequency Accuracy at 400 kHz
Performance Test 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 331
Oscilloscope
Performance Test 20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 332
RF Analyzer Level Accuracy
Performance Test 21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 333
RF Analyzer FM Accuracy
Performance Test 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 334
RF Analyzer FM Distortion
Performance Test 23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 335
RF Analyzer FM Bandwidth
Performance Test 24 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 336
RF Analyzer Residual FM
Performance Test 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 337
Spectrum Analyzer Image Rejection
Performance Test 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 338
CDMA Generator RF In/Out Amplitude Level Accuracy
Performance Test 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 339
CDMA Generator Duplex Out Amplitude Level Accuracy
Performance Test 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 340
CDMA Generator Adjacent Channel Spectral Purity
Performance Test 29
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 341
CDMA Analyzer Average Power Level Accuracy
Performance Test 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 342
CDMA Analyzer Calibrated Tuned Channel Power Level Accuracy Perfo rmance Test 31 . 343
CDMA Analyzer Relative Tuned Channel Power Level Accuracy Performance Test 32 . . . 344
10. 8924E Performance Test Records
8924E RF Communications Test Set . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 346
5
Contents
RF Gen FM Distortion
Performance Test 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .347
RF Gen FM Accuracy
Performance Test 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .349
RF Gen FM Flatness
Performance Test 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .350
RF Gen Residual FM
Performance Test 4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .351
RF Gen Duplex Output High Level Accuracy
Performance Test 5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .352
RF Gen Duplex Output Low Level Accuracy
Performance Test 6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .353
RF Gen RF IN/OUT Level Accuracy
Performance Test 7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .356
RF Gen Harmonics Spectral Purity
Performance Test 8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .359
RF Gen Spurious Spectral Purity
Performance Test 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .362
AF Gen AC Level Accuracy
Performance Test 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .364
AF Gen Residual Distortion
Performance Test 12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .365
AF Gen Frequency Accuracy
Performance Test 13 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .366
AF Analyzer AC Voltage Accuracy
Performance Test 14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .367
AF Analyzer Residual Noise
Performance Test 15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .368
AF Analyzer Distortion, SINAD and SNR Accuracy
Performance Test 16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .369
AF Analyzer DC Level Accuracy
Performance Test 17 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .370
AF Analyzer Frequency Accuracy to 100 kHz
Performance Test 18 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .371
AF Analyzer Frequency Accuracy at 400 kHz
Performance Test 19 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .372
Oscilloscope
Performance Test 20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .373
RF Analyzer Level Accuracy
Performance Test 21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .374
RF Analyzer FM Accuracy
Performance Test 22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .375
RF Analyzer FM Distortion
Performance Test 23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .376
RF Analyzer FM Bandwidth
Performance Test 24 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .377
RF Analyzer Residual FM
Performance Test 25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .378
Spectrum Analyzer Image Rejection
6
Contents
Performance Test 26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 379
CDMA Generator RF In/Out Amplitude Level Accuracy
Performance Test 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 380
CDMA Generator Duplex Out Amplitude Level Accuracy
Performance Test 28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 381
CDMA Generator Adjacent Channel Spectral Purity
Performance Test 29
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 382
CDMA Analyzer Average Power Level Accuracy
Performance Test 30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 383
CDMA Analyzer Calibrated Tuned Channel Power Level Accuracy Perfo rmance Test 31 . 384
CDMA Analyzer Relative Tuned Channel Power Level Accuracy Performance Test 32 . . . 385
11. 8924C/E Specifications
Signal Generator Specifications (Analog Mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 388
Audio Source Specifications (Analog Mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 391
RF Analyzer Specifications (Analog Mode). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 393
Spectrum Analyzer Specifications (8924E: Option 102 required). . . . . . . . . . . . . . . . . . . . . 396
Adjacent Channel Power Specifications (8924C ONLY) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 398
AF Analyzer Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 400
Oscilloscope Specifications (Analog Mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 406
Signaling Specifications (Analog Mode) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 407
DC Current Meter Specifications (Analog Mode). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 408
CDMA Call Processing Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 409
CDMA Generator Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 413
CDMA Analyzer Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 416
CDMA Reverse Channel Spectrum Display
(8924E: Option 102 required) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 422
CDMA Triggers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 423
General Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 424
12. Service Screen
Troubleshooting with the Service Screen . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 434
13. Block Diagrams
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 440
Section Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 441
Assembly Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 454
14. 8924C Replaceable Parts
General Information about Replaceable Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 508
Replaceable Parts Listing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 9
15. 8924E Replaceable Parts
General Information about Replaceable Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 516
Replaceable Parts Listing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51 7
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 523
7
Contents
16. Diagnostics Descriptions
Description Of Self-Test Diagnostic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .527
Description Of Audio Diagnostics (AFDIAGS3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .534
Description of RF Diagnostics (RFDIAGS3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .566
Description Of Miscellaneous Diagnostics (MSDIAGS3) . . . . . . . . . . . . . . . . . . . . . . . . . . . .588
Description of the Digital Assembly Diagnostics (CDMADIAG) . . . . . . . . . . . . . . . . . . . . . .592
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .600
General Information About Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .601
8
Agilent Technologies 8924C/E
CDMA Mobile Station Test Set
Assembly Level Repair
POWER
OFF ON
RF IN/OUT
MAX PWR
CDMA CALL CON TROL
CDMA SCRNS
CELL
CALL
CTRL
SPECTRUM
GEN
CTRL
CDMA SCRNS
ENCODER
RF
ANL
AF
ANL
SPEC ANL
RF
GEN
END
CALL
RANGE
RX
TEST
MSRPT
TX
TEST
DECODER
RX
TEST
ACP
TX
TEST
SCOPE
DUPLEX
CALL ANS
USER DATA
k1’
k1
k2’
k2
k3’
k3
ASSIGN
k4
RELEASE
k5
!
6 W
MAX PWR
200 mW
ANT INDUPLEX OUT
!
FUNCTIONS
MSG
PRINTER
HELP
PRINT
DATA FUNCTIONS
REF SET
METER
INCR
INCR
: 10
SET
LO LIMIT HI LIMIT
CURSOR
CONTROL
CANCELSHIFT
I/O CONFIG CONFIG
PREV TESTS
AVG
INCR X10
PUSH TO
SELECT
INSTRUMENT STATE
ADRS
SAVE
LOCAL
RECALL
789
456
123
+
0
NO
ON/OFF
YES
Ω
%
ppm
dB
W
µV
AUDIO OUTSQUELCHVOLUMEMIC/ACC
MAX
!
12 v Pk
HOLD
MEAS
PRESET
RESET
MEMORY
CARD
ENTER
dB
GHz
dBm
%
MHz
V
s
kHz
_
mV
ms
Hz
µV
AUDIO IN
LOHI
MAX
!
42 v Pk
Agilent Technologies
08924-90061
Printed in USA
April 2000
Rev. B
Notice
Information contained in this document is subject to change without notice.
All Rights Reserved. Reproduction, adaptation, or translation without prior written
permission is prohibited, except as allowed under the copyright laws.
This material may be reproduced by or for the U.S. Government pursuant to the Copyright
License under the clause at DFARS 52.227-7013 (APR 1988).
Agilent Technologies, Inc.
Learning Products Department
24001 E. Mission
Liberty Lake, WA 99019-9599
U.S.A.
1 Preface
11
Preface
Edition/Print Date
Edition/Print Date
All Editions and Updates of this manu al and their creation dates are
listed below.
Rev. A November 1998
Rev. B April 2000
12 S:\agilent\8924e\ALR\book\chapters\preface.fm
Preface
Safety Summary
Safety Summ ar y
The following general safety precautions mus t be obs erv ed during all
phases of operation of this instrument. Failure to comply with these
precautions or with speci fic war nings elsewhere in this man ual violates
safety standards of design, manufacture, and intended use of the
instrument. Agilent Technologies Inc. assumes no liability for the
customer’s failure to comply with these requirements.
GENERAL
This product is a Safety Class 1 instrument (provided with a protective
earth terminal). The protective features of this product may be
impaired if it is used in a manner not specified in the operation
instructions.
All Light Emitting Diodes (LEDs) used in this product are Class 1
LEDs as per IEC 60825-1.
This product has been designed and tested in accordance with IEC
Publication 1010, "Safety Requirements for Electronic Measuring
Apparatus," and has been supplied in a safe condition. This instruction
documentation contains information and warnings which must be
followed by the user to ensure safe operation and to maintain the
product in a safe condition.
ENVIRONMENTAL CONDITIONS
This instrument is intended for indoor use in an installation category
II, pollution degree 2 environment. It is designed to operate at a
maximum relative humidity of 95% and at altitudes of up to 2000
meters. Refer to the specifications tables for the ac mains voltag e
requirements and ambient operating temperature range.
V entilation Require ments: When installing the prod uct in a cabinet, the
convection into and out of the product must not be restricted. The
ambient temperature (outside the cabinet) must be less than the
maximum operating temperature of the product by 4° C for every 100
watts dissipated in the cabinet. If the total power dissipated in the
cabinet is greater than 800 watts, then forced convection must be used.
BEFORE APPLYING POWER
Verify that the product is set to match the available line voltage, the
correct fuse is installed, and all safety precautions are taken. Note the
instrument's external markings described under Safety Symbols.
Chapter 1 13
Preface
Safety Summary
GROUND THE INSTRUMENT
To m inimize shock hazard, the instrument chassis and cover must be
connected to an electrical protective earth ground. The instrument
must be connected to the ac power mains through a grounded power
cable, with the ground wire firmly conne cted to an electrical ground
(safety ground) at the power outlet. Any interruption of the protective
(grounding) conductor or dis connection of the protective earth terminal
will cause a potential shock hazard that could result in personal injury.
FUSES
Only fuses with the required rated current, voltage, and specified type
(normal blow, time delay, etc.) should be used . Do not use repaired f uses
or short-circuited fuse holders. To do so could cause a shock or fire
hazard.
DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE
Do not operate the instrument in the presence of flammable gases or
fumes.
DO NOT REMOVE THE INSTRUMENT COVER
Operating personnel must not remove instrument covers. Component
replacement and internal adjustments must be made only by qualifie d
service personnel.
Instruments that appear damaged or defective should be made
inoperative and secured a gainst unint ended ope ration until t hey can be
repaired by qualified service personnel.
WARNING The WARNING sign denotes a hazard. It calls attention to a
procedure, practice, or the like, which, if not correctly
performed or adhered to, could result in personal injury. Do not
proceed beyond a W ARNING s ign until the indicated conditi ons
are fully understood and met.
CAUTION The CAUTION s i gn denotes a hazard. It calls attention to an operating
procedure, or the like, which, if not correctly performed or adhered to,
could result in damage to or destr ucti on of par t or all o f the pr oduct. Do
not proceed beyond a CAUTION sign until the indicated conditions are
fully understood and met.
14 S:\agilent\8924e\ALR\book\chapters\preface.fm
Preface
Safety Summary
Safety Symbols
Caution, refer to accompanying documents
Warning, risk of elec tric shock
Earth (ground) terminal
Alternating current
Frame or chassis terminal
Standby (supply). Units with this sym b ol are not completely
disconnected from ac mains when this switch is off.
To completely disconnect the unit from ac mains, either disconnect the
power cord, or have a qualified electrician install an external switch.
Chapter 1 15
Preface
Product Markings
Product Markings
CE - the CE mark is a registered trademark of the European
Community. A CE mark accompanied by a year indicated the year the
design was proven.
CSA - the CSA mark is a registered trademark of the Canadian
Standards Association.
16 S:\agilent\8924e\ALR\book\chapters\preface.fm
Preface
CERTIFICATION
CERTIFICATION
Agilent Technologies certifies that this product met its published
specificatio ns at the time of shipment from the factory. Agilent
Technologies further certifies that its calibration measurements are
traceable to the United States National Institute of Standards and
Technology, to the extent allowed by the Institute’s calibration facility,
and to the calibration facilities of other International Standards
Organization members
Chapter 1 17
Preface
Agilent Technologies Warranty Statement for Commercial Products
Agilent Technologies Warranty Statement for
Commercial Products
Agilent Technologies 8924C/E
Duration of Warranty: 1 year
1. Agilent Technologies warrants Agilent Technologies hardware,
accessories and supplies against def ects in materials and
workmanship for the period specified above. If Agilent T echnologies
receives notice of such defects during the warranty period, Agilent
Technologies will, at its option, either repair or replace products
which prove to be defective. Replaceme n t products may be either
new or like-new.
2. Agilent Technologies warrants that Agilent Technologies software
will not fail to execute its programming instructions , for the period
specified above, due to defects in material and workmanship when
properly installed and used. If Agilent T echnologies re ceives notice of
such defects during the warranty period, Agilent Technologies will
replace software media which does not execute its programming
instruction s du e to such defects.
3. Agilent Technologies does not warrant that the operation of Agilent
Technologies products will be uninterrupted or error free. If Agilent
Tec hnologies is unable , within a reasonable time, to repa ir or replace
any product to a conditio n as w a rrant ed, c ust omer wil l be enti tled t o
a refund of the purchase price upon prompt return of the product.
4. Agilent Technologies products may contain remanufactured parts
equivalent to new in performance or may have been subject to
incidental use.
5. The warranty period begins on the date of delivery or on the date of
installation if installed by Agilent Technologies. If customer
schedules or delays Agilent Technologies installation more than 30
days after delivery, warr anty begins on the 31st day from delivery.
6. Warranty does not apply to defects resulting from (a) improper or
inadequate maintenance or calibration, (b) sof tware, interfacing,
parts or supplies not supplied by Agilent Technologies, (c)
unauthorized modification or misuse, (d) operation outside of the
published environmental specifications for the product, or (e)
improper site preparation or maintenance.
18 S:\agilent\8924e\ALR\book\chapters\preface.fm
Preface
Agilent Technologies Warranty Statement for Commercial Products
7. TO THE EXTENT ALLOWED BY LOCAL LAW, THE ABOVE
WARRANTIES ARE EXCLUSIVE AND NO OTHER
WARRANTYOR CONDITION, WHETHER WRITTEN OR ORAL IS
EXPRESSED OR IMPLIED AND AGILENT TECHNOLOGIES
SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OR
CONDITIONS OR MERCHANTABILITY, SATISFACTORY
QUALITY, AND FITNESS FOR A PARTICULAR PURPOSE.
8. Agilent Technologies will be liable for damage to tangible property
per incident up to the greate r of $300,000 or the actual amount paid
for the product that is the subject of the claim, and for damages for
bodily injury or death, to the extent that all such damages are
determined by a court of compet ent jurisdicti on to have been dire ctly
caused by a defective Agilent Technologies product.
9. TO THE EXTENT ALLOWED BY LOCAL LAW, THE REMEDIES
IN THIS WARRANTY STATEMENT ARE CUSTOMER’S SOLE
AND EXCLUSIVE REMEDIES. EXCEPT AS INDICATED ABOVE,
IN NO EVENT WILL AGILENT TECHNOLOGIES OR ITS
SUPPLIERS BE LIABLE FOR LOSS OF DATA OR FOR DIRECT,
SPECIAL, INCIDENTAL, CONSEQUENTIAL (INCLUDING LOST
PROFIT OR DATA), OR OTHER DAMAGE, WHETHER BASED IN
CONTRACT, TORT, OR OTHERWISE.
FOR CONSUMER TRANSACTIONS IN AUSTRALIA AND NEW
ZEALAND: THE WARRANTY TERMS CONTAINED IN THIS
STATEMENT, EXCEPT TO THE EXTENT LAWFULLY
PERMITTED, DO NOT EXCLUDE RESTRICT OR MODIFY AND
ARE IN ADDITION TO THE MANDATORY STATUTORY RIGHTS
APPLICABLE TO THE SALE OF THIS PRODUCT TO YOU.
Chapter 1 19
Preface
ASSISTANCE
ASSISTANCE
Product maintenance agreements and other customer assistance
agreements are available for Agilent Technologies products. For any
assistance, contact your nearest Agilent Technologies Sales and Service
Office.
20 S:\agilent\8924e\ALR\book\chapters\preface.fm
Preface
Service and Support
Service and Support
Any adjustment, maintenance, or repair of this product must be
performed by qualified personnel. Contact your customer engineer
through your local Agilent Technologies Service Center. You can find a
list of local service repr esentatives on the Web at:
http://www.agilent-tech.com/services/English/index.html
If you do not have access to the I nter net, one of these ce nter s can dire ct
you to your nearest representative:
United States Test and Measurement Call Center
(Toll free in US)
(800) 452-4844
Europe
(31 20) 547 9900
Canada
(905) 206-4725
Japan Measurement Assistance Center
(81) 426 56 7832
(81) 426 56 7840 (FAX)
Latin America
(305) 267 4288 (FAX)
Australia/New Zealand
1 800 629 485 (Australia)
0800 738 378 (New Zealand)
Asia-Pacific
(852) 2599 7777
(852) 2506 9285 (FAX)
Chapter 1 21
Preface
Regional Sales Offices
Regional Sales Offices
United States of America:
Agilent Te chnologies(tel) 1 800 452 4844
Test and Measurement Call Center
P.O. Box 4026
Englewood, CO 80155-4026
Canada:
Agilent Technologies Canada Inc.(tel) 1 877 894 4414
5150 Spectrum Way
Mississauga, Ontario
L4W 5G1
Europe:
Agilent Technologies(tel) (3120) 547 9999
European Marketing Organization
P.O. Box 999
1180 AZ Amstelveen
The Netherlands
Japan:
Agilent Technologies Japan Ltd.(tel) (81) 456- 56-7832
Measurement Assistance Center(fax) (81) 426-56 -7840
9-1 Takakura-Cho, Hachioji-Shi,
Tokyo 192-8510, Japan
Latin America:
Agilent Technologies(tel) (305) 267 4245
Latin America Region Headquarters(fax) (305) 267 4286
5200 Blue Lagoon Drive,
Suite #950
Miami, Florida 33126
U.S. A.
Australia/New Zealand:
Agilent Te chnologies Australia Pty Ltd.AustraliaNew Zealand
347 Burwood Highway(tel) 1 800 629 485 (tel) 0 800 738 378
Forest Hill, Victoria 3131(fax) (61 3) 9272 0749(fax) (64 4) 802 6881
Asia Pacific:
Agilent Technologies(tel) (852) 3197 7777
24/F, Cityplaza One,(fax) (852) 2506 9233
111 Kings Road,
Taikoo Shing, Hong Kong
22 S:\agilent\8924e\ALR\book\chapters\preface.fm
Declaration of Conformity 8924C
Declaration of Conformity 8924C
DECLARATION OF CONFORMITY
according to ISO/IEC Guide 22 and EN 45014
Preface
Manufacturer’s Name:
Manufacturer’s Address:
Agilent Technologies
Spokane Division
24001 E. Mission Avenue
Liberty Lake, Washington 99019-9599
USA
declares that the product
Product Name:
Model Number:
Product Options:
CDMA Mobile Station Test Set
Agilent 8924C
This declaration covers all options of the abo ve
product.
conforms to the following Produc t specifications :
Safety: IEC 1010-1:1990+A1 / EN 61010- 1:1 99 3
CAN/CSA-C22.2 No. 1010.1-92
EMC: CISPR 11:1990/EN 55011:1991 Group 1, Class A
IEC 801-2:1984/EN 50082-1:1992 4 kV CD, 8 kV AD
IEC 801-3:1984/E N 50 082 - 1:1 992 3V/m
IEC 801-4:1988/EN 50082-1:1992 0.5 kV Sig. Lines, 1 kV Power Lines
Supplementary Information:
This product herewith complies with the requirements of the Low Voltage Directive
73/23/EEC and the EMC Directive 89/336/EEC.
Spokane, Washington USA November 20, 1995
Date Vince Roland/Quality Manager
European Contact: Your local Agilent Sales and Service Office or Agilent GmbH
Department ZQ/Standards Europe, Herrenberger Strasse 130, D-71034 Böblinger, Germany
Chapter 1 23
Preface
Declaration of Conformity 8924E
Declaration of Conformity 8924E
DECLARATION OF CONFORMITY
according to ISO/IEC Guide 22 and EN 45014
Manufacturer’s Name:
Manufacturer’s Address:
Agilent Technologies
Spokane Division
24001 E. Mission Avenue
Liberty Lake, Washington 99019-9599
USA
declares that the product
Product Name:
Model Number:
Product Options:
CDMA Mobile Station Test Set
Agilent 8924E
This declaration covers all options of the abo ve
product.
conforms to the following Produc t specifications :
Safety: IEC 1010-1:1990+A1 / EN 61010- 1:1 99 3
CAN/CSA-C22.2 No. 1010.1-92
EMC: CISPR 11:1990/EN 55011:1991 Group 1, Class A
IEC 801-2:1984/EN 50082-1:1992 4 kV CD, 8 kV AD
IEC 801-3:1984/E N 50 082 - 1:1 992 3V/m
IEC 801-4:1988/EN 50082-1:1992 0.5 kV Sig. Lines, 1 kV Power Lines
Supplementary Information:
This product herewith complies with the requirements of the Low Voltage Directive
73/23/EEC and the EMC Directive 89/336/EEC.
Spokane, Washington USA March 27, 1998
Date Vince Roland/Quality Manager
European Contact: Your local Agilent Sales and Service Office or Agilent GmbH
Department ZQ/Standards Europe, Herrenberger Strasse 130, D-71034 Böblinger, Germany
24 S:\agilent\8924e\ALR\book\chapters\preface.fm
Preface
Manufacturer’s Declaration
Manufacturer’s Declaration
This statement is provided to comply with the requirements of the
German Sound Emission Directive, from 18 January 1991.
This product has a sound pres sur e emission ( at t he ope rato r posit ion) <
70 dB(A).
• Sound Pressure Lp < 70 dB(A).
• At Operator Position.
• Normal Operation.
• According to ISO 7779:1988/EN 27779:1991 (Type Test) .
Chapter 1 25
Preface
Herstellerbescheinigung
Herstellerbescheinigung
Diese Information steht im Zusammenhang mit den Anf orderungen der
Maschinenlärminformationsverordnung vom 18 Januar 1991.
• Schalldruckpegel Lp < 70 dB(A).
• Am Arbeitsplatz.
• Norma l e r B e tr i e b.
• Nach ISO 7779:1988/EN 27779:1991 (Typprüfung).
26 S:\agilent\8924e\ALR\book\chapters\preface.fm
Table 1-1
Earth
Ground
Line Neutral
Preface
Power Cables
Power Cables
Plug Type Plug Descriptions
male/female
Straight/Straight
Straight/90
Agilent Part #
(cable &plug)
8120-1689
8120-1692
Cable Descriptions
79 inches, mint gray
79 inches, mint gray
Used in the following locations
Afghanistan, Albania, Algeria, Angola, Armenia,Austria, Azerbaijan, Azores
Bangladesh, Belgium, Benin, Bolivia,Boznia-Herzegovina, Bulgaria, Burkina Faso, Burma,
Burundi,Byelarus
Cameroon, Canary Islands, Central AfricanRepublic, Chad, Chile, Comoros, Congo, Croatia,
Czech Republic,Czechoslovakia
Denmark, Djibouti
East Germany, Egypt, Estonia, Ethiopia
Finland, France, French Guiana, French Indian Ocean Areas
Gabon, Gaza Strip, Georgia, Germany, Gozo, Greece
Hungary
Iceland, Indonesia, Iran, Iraq, Israel, Italy, Ivory Coast
Jordan
Kazakhstan, Korea, K yrgystan
Latvia, Lebanon, Libya, Lithuania, Luxembourg
Macedonia, Madeira Islands, Malagasy Republic, Mali, Malta, Mauritania, Miquelon, Moldova,
Mongolia, Morocco, Mozambique
Nepal, Netherlands, Netherlands Antilles, Niger, Norway
Oman
Pakistan, Paraguay, Poland, Portugal
Rep. South Africa, Romania, Russia, Rwanda
Saudi Arabia (220V), Senegal, Slovak Republic, Slovenia, Somalia, Spain, Spanish Africa, Sri
Lanka, St.Pierce Islands
Chapter 1 27
Table 1-1
Earth
Ground
Line Line
Earth
Ground
Line Neutr
Preface
Power Cables
Plug Type Plug Descriptions
male/female
Agilent Part #
(cable &plug)
Sweden, Syria
Tajikistan, Thailand, Togo, Tunisia, Turkey, Turkmenistan
USSR, Ukraine, Uzbekistan
Western Africa, Western Sahara
Yugoslavia
Zaire
Table 1-2
Plug Type Plug Descriptions
male/female
Straight/Straight 8120-0698 90 inches, black
Agilent Part #
(cable &plug)
Cable Descriptions
Cable Descriptions
Used in the following locations
Peru
Table 1-3
Plug Type Plug Descriptions
male/female
Straight/Straight 8120-0698 90 inches, black
Used in the following locations
Switzerland
Agilent Part #
(cable &plug)
Cable Descriptions
28 S:\agilent\8924e\ALR\book\chapters\preface.fm
Table 1-4
125V
Earth
Ground
LineNeutral
Preface
Power Cables
Plug Type Plug Descriptions
male/female
Straight/Straight
Straight/90
Straight/Straight
Agilent Part #
(cable &plug)
8120-0698
8120-1521
8120-1751
Cable Descriptions
90 inches, jade gray
90 inches, jade gray
90 inches, jade gray
Used in the following locations
American Samoa
Bahamas, Barbados, Belize, Bermuda, Brazil
Caicos, Cambodia, Canada, Cayman Islands, Columbia, Costa Rica, Cuba
Dominican Republic
Ecuador, El Salvador
French West Indies
Guam, Guatemala, Guyana
Haiti, Honduras
Jamaica
Korea
Laos, Le eward and Windward Is., Liberia
Mexico, Midway Islands
Nicaragua
Other Pacific Islands
Panama, Philippines, Puerto Rico
Saudi Arabia (115V,127V), Suriname
Taiwan, Tobago, Trinidad, Trust Territories of Pacific Islands
Turks Island
United States
Venezuela, Vietnam, Virgin Islands of the US
Wake Island
Chapter 1 29
Table 1-5
JIS C 8303, 100 V
Earth
Ground
LineNeutral
Earth
Ground
Line
Neutral
Earth
Ground
Line
Neutral
Preface
Power Cables
Plug Type Plug Descriptions
male/female
Straight/Straight
Straight/90
Used in the following locations
Japan
Table 1-6
Plug Type Plug Descriptions
male/female
90/Straight
90/90
Straight/Straight
Agilent Part #
(cable &plug)
8120-4754
8120-4754
Agilent Part #
(cable &plug)
8120-2956
8120-2957
8120-3997
Cable Descriptions
90 inches, dark gray
90 inches, dark gray
Cable Descriptions
79 inches, gray
79 inches, gray
79 inches, gray
Used in the following locations
Denmark
Greenland
Table 1-7
Plug Type Plug Descriptions
male/female
Straight/Straight
Straight/90
Used in the following locations
Botswana
India
Lesotho
Agilent Part #
(cable &plug)
8120-4211
8120-4600
Cable Descriptions
79 inches, mint gray
79 inches, mint gray
Malawi
30 S:\agilent\8924e\ALR\book\chapters\preface.fm
Table 1-7
Line
Neutral
Earth
Ground
Earth
Ground
Line
Neutral
Preface
Power Cables
Plug Type Plug Descriptions
male/female
South-West Africa (Namibia), Swaziland
Zambia, Zimbabwe
Table 1-8
Plug Type Plug Descriptions
male/female
Straight/Straight
Straight/Straight
Straight/90
Straight/90
Used in the following locations
System Cabinets
Table 1-9
Agilent Part #
(cable &plug)
Agilent Part #
(cable &plug)
8120-1860
8120-1575
8120-2191
8120-4379
Cable Descriptions
Cable Descriptions
60 inches, jade gray
30 inches, jade gray
60 inches, jade gray
15.5 inches, jade gray
Plug Type Plug Descriptions
male/female
90/Straight
90/90
Used in the following locations
Bahrain, British Indian Ocean Terr., Brunei
Canton, Cyprus
Enderbury Island, Equatorial Guinea
Falkland Islands, French Pacific Islands
Gambia, Ghana, Gibraltar, Guinea
Hong Kong
Ireland
Kenya, Kuwait
Agilent Part #
(cable &plug)
8120-1351
8120-1703
Cable Descriptions
90 inches, mint gray
90 inches, mint gray
Macao, Malaysia, Mauritius
Chapter 1 31
Table 1-9
Line
Neutral
Earth
Ground
Preface
Power Cables
Plug Type Plug Descriptions
male/female
Agilent Part #
(cable &plug)
Cable Descriptions
Nigeria
Qatar
Seychelles, Sierra Leone, Singapore, Southern Asia, Southern Pacific Islands, St. Helena, Sudan
Tanzania
Uganda, United Arab Emirates, United Kingdom
Yeman (Aden & Sana)
Table 1-10
Plug Type Plug Descriptions
male/female
Straight/Straight
Straight/90
Agilent Part #
(cable &plug)
8120-1369
8120-0696
Cable Descriptions
79 inches, gray
80 inches, gray
Used in the following locations
Argentina, Australia
China (People’s Republic)
New Zealand
Papua New Guin ea
Uruguay
Western Samoa
32 S:\agilent\8924e\ALR\book\chapters\preface.fm
Figure 1-1
ATTENTION
Static Sensitive
Devices
This instrument was constructed in an ESD (electro-static discharge) protected environment. This is
because most of the semi conductor devices used in this instrument are susceptible to damage by
static discharge.
Depending on the magnitude of the charge, device substrates can be punctured or destroyed by
contact or mere pr oximity of a s tatic char ge. The r e sult can cause degradat ion of device performance,
early failure, or immediate destruction.
Preface
Power Cables
These charges are generated in numerous ways such as simple contact, separation of materials, and
normal motions of persons working with static sensitive devices.
When handling or servicing equipment containing static sensitive devices, adequate precaution s must
be taken to prevent device damage or destruction.
Only those who are thoroughly familiar with industry accepted techniques for handling static
sensitive devices should attempt to service circuitry with these devices.
In all instances, measures must be taken to prevent static charge build-up on work surfaces and
persons handling the devices.
Chapter 1 33
Preface
Power Cables
34 S:\agilent\8924e\ALR\book\chapters\preface.fm
2 Introduction
This manual explains how to repair and calibrate the Agilent
Technologies 8924C/E CDMA Mobile Station Test Set; called “the Test
Set” throughout this manual.
35
Introduction
Test Set Description
Test Set Description
Several analog and digital test instruments are integrated into one
package to te st Code Divis i on Multiple Access (CDMA) digital cellular
telephones and several types of analog telephones ( suc h as AMPS,
NAMPS, and T ACS ). Some of the instrument functions in the Test Set
include:
• Synthesized AM, FM, and IQ modulation signal generator
• AM, FM, and IQ modulation analyzer
• Duplex offset generator
• SSB demo d u l ato r
• RF and audio power meters
• Audio and RF frequency counter and RF frequency error meter
• AC and DC voltmeter
• Oscilloscope
• Spectrum analyzer and tracking generator (optional on Agilent
8924E)
• Signaling encoder and decoder
• DC current meter
Some of these functions are dire ctly replaceable as semblies (such as the
spectrum analyzer); some functions are digitally derived from other
assemblies (such as the oscilloscope). There are about 40 replaceable
assemblies - mo st l y plu g -i n pr i n te d circuit boards.
Most instrument functions can be cont rolled by front-panel (local)
controls and by remote commands ( using a c onnected controll er). Power
on/off, volume, and squelch controls cannot be accessed remotely.
Controls are grouped together on display screens that are usually
associated with a specific task (suc h as making a call to a CDMA mobile
phone).
An Instrument BASIC (IB ASIC) c omputer is als o built int o the Test Set
to allow automated operation without using an external controller. This
computer also has the ability to be a system controller to other tes t
system instruments. Refer to the Test Set’s User’s Guide for information
on using the IBASIC computer (also referred to as the IBASIC
controller).
36
S:\agilent\8924e\ALR\book\chapters\intro.fm
Front & Rear Panel Connections
Introduction
Test Set Description
CALL CONTROL
CDMA GENERATOR CONTROL
CDMA CALL CONTROL
Frequency Counter
Spectrum Analyzer*
Receiver
DC Current
Signal Generator
Signaling Encoder
Modulation Analyzer
68020 Host Processor
* optional for Agilent 8924E
ME
SHI
ADRS
CALL ANS
k1’
k1
k2’
k2
k3’
k3
ASSIGN
k4
RELEASE
k5
CELL
CALL
CTRL
SPECTRUM
GEN
CTRL
ENCODER
RF
ANL
AF
ANL
SPEC ANL
RF
GEN
END
CALL
RANGE
RX
TEST
MSRPT
TX
TEST
DECODER
RX
TEST
ACP
TX
TEST
SCOPE
DUPLEX
MSG
PRINTER
HELP
PRINT
REF SET
METER
INCR
INCR
: 10
SET
LO LIMIT HI LIMIT
CURSOR
CONTROL
CANCELSHIFT
I/O CONFIG CONFIG
PREV TESTS
AVG
INCR X10
PUSH TO
SELECT
ON/OFF
SAVE
LOCAL
RECALL
789
456
123
_
+
0
NO
YES
%
ppm
dB
W
µV
HOLD
MEAS
RESET
ENTER
dB
GHz
dBm
%
MHz
V
s
kHz
mV
ms
Hz
µV
Chapter 2 37
Introduction
Theory of Operation
Theory of Operation
The Tes t Set is primarily an RF transceiver that operates in the 30 to
1000 MHz range, and a group of instruments that analyze received
signals. Several modulat ion sources are avai lable for testing a variety of
cellular phones and other types of radios . A modulation analyzer is used
to measure various parameters on the rec eived signal from the
radio-under-test. The oscilloscope and spectrum analyzer provide
additional received signal analysis .
The following information is very general. Refer to Chapter 9, Block
Diagrams, for detailed dra wings for each assembly.
Internal
Operating
System
Instrument
Frequency
References
A 68020 microprocessor acts as the “host” processor of the Test Set. It
receives co m mands from th e fro nt-panel con trols and com m u n i ca tes
directly with almost every assembly inside the Test Set. The host is also
in constant communication with several other microprocessors located
in assemblies throughout the Test Set.
Communications to the GPIB , Serial, and P arallel p orts are through the
Control Interface (A33) assembly to the host processor.
This processor is also the core for the internal IBASIC computer. The
IBASIC computer is used t o load and run var ious sof tw are pac kages f or
automated radio tests. It is also responsible for executing the internal
diagnostic routines used to troubleshoot a failing inst rument.
Most of the Test Set’s internal oscillato rs and c ounters ar e phase- locked
to the signal input from the rear-panel REF INPUT port. This signal is
usually the output of the 10 MHz Oven Oscillator (A38) assembly, also
available on the rear -pane l. The Reference Assembly (A27) is inter nally
connected to the CDMA Reference (A29), which is connected to the
external reference. The CDMA Reference provides the clocks for the
CDMA assemblies, the A WGN (Add itive White Gaussian Noi se) source ,
and the reference for the Reference Assembly. The Reference Assembly
provides the references for the analog ass emblies.
38
If the message“Reference unlocked, check reference connection
and frequency” is displayed on the top of the Test Set’s screen, verify
that a good BNC cable (or factory jumper) is connecte d between the
REF INPUT and 10 MHz OVEN OUT ports. If the message is still
displayed, make sure the External Reference control on the
CONFIGURE screen is set to 10.0000 MHz, and use a frequency
counter to verify the presence and frequency of the 10 MHz Oven’s
Output signal. If an external reference is used, verify that the reference
frequency matches the External Reference setting (±10 ppm), and
that the level is at 0 dbm (±3 dB).
S:\agilent\8924e\ALR\book\chapters\intro.fm
Introduction
Theory of Operation
Rear-Panel
EVEN SEC
Input
External Jumper
Rear-Panel
10 MHz REF
OUTPUT
External CDMA Timing
Reference Input
CDMA Ref (A29)
REF INPUT
10MHz Oven
Oscillator
(A38)
10 MHz
10 MHz
CDMA Clocks to the Receive and Optional DSP Assemblies, Protocol
Processor,
10 MHz
Cell Site Digital assemblies, Cell Site Analog Assembly, and
LO/IF/DEMOD Assembly (A31)
1 MHz to Receiver Synthesizer
Reference Assembly
(A27)
1 MHz to Signal Generator Synthesizer
1 GHz to Output Assembly
20 MHz to Frequency Counter
20 MHz to Spectrum Analyzer
500 MHz to Receiver
10 MHz to Receiver (
SSB & FM Demod)
rear panel.
RF Analysis RF signals connected to the front panel RF IN/OUT port or ANTENNA
IN port go to the Input Assembly (A5). The signal level and RF
frequency are measured, and the level is adjusted using fixed st ep and
variable attenuators.
NOTE Over-power damage!
The ANTENNA IN connector is only used for very low level signals (200
mW or less), and cannot be used for Transmitter (TX) Power
measurements. Exceeding this limit may destroy this assembly! The RF
IN/OUT connector is used to measure direct mobile transmitter power
up to 3.0 Watts.
RF IN/OUT
ANTENNA
IN
The Receiver 1st Mixer Assembly (A19) then mixes the signal with a
local oscillator signal from the Receiver Synthesizer Assembly (A28) to
produce a 114.3 MHz or 614.3 MHz IF signal (depending on the
frequency of the received signal). The signal goes through a bandpass
filter and then to the Receiver Assembly (A30). .
If the IF is 614.3 MHz, the Receiver Assembly then mixes the signal
with a 500 MHz LO signal from the Reference Assembly (A27) to get
the 114.3 MHz IF. If the IF from A28 is already 114.3 MHz, the signal
bypasses this downconversion.
The 114.3 MHz signal divides into two paths.
Input Assembly (A5)
Power
Detector
Receiver 1st Mixer Assembly (A19)
114.3 MH z
486-1026 MHz from
Receiver Synthesizer
Assembly
614.3 MHz
LO/IF Demod Assembly (CDMA Demod)
Receiver Assembly (A30)
114.3 MHz
500 MHz from
Reference Assy
AM, FM, SSB
Demodulation
114.3 MHz
Chapter 2 39
Introduction
Theory of Operation
AM, FM, or SSB
Modulation
Analysis
(Agilent 8924E:
FM only)
For AM, FM, or SSB signals, the 114.3 MHz signal is downconverted to
10.7 MHz and routed through a user-selected IF bandpass filter (15
kHz or 230 kHz) that is centered around the 10.7 MHz IF. AM and SSB
signals are demodulated at this point; FM signals are downconvert ed to
a 700 kHz IF before demodulation. The demodulat ed si gnal is rout ed to
the Audio Analyzer 1 (A35) assembly for audi o frequency filt ering . This
assembly is also connected to the front-panel AUDIO IN connector for
direct audio measurements. Several low- pass and high-pas s filters can
be selected, as well as a C-Message or o ptional CCITT filter. Frequency
and voltage measurements are then made on this signal by the
Measurement Assembly (A37). The signal is then routed to the Audio
Anlayzer 2 (A36) assembly.
The Audio Analyzer 2 assembly routes the signal through a
user-selectable detector. A variable frequency notch filter may also be
selected for SINAD and distortion measurements. The detector’s signal
is then sent to several other assemblies:
• The Measurement Assembly, to measure and display the modulation
level (such as FM deviation) and provide the input to the
oscilloscope.
• The Signaling Source and Analyzer (A15) assembly for signaling
decoding.
Receiver Assembly (A30)
114.3 MHz
IF 10.7 MHz
125 MHz
Audio Analyzer 2 Assembly (A36)
Selectable Detectors
RMS
RMS*SQRT2
Pk+
Pk-
.......
• The rear-panel AU D MONITOR OUTPUT connector f or external use
of the demodulated signal.
• The front-panel control and internal to listen to the demodulated
signal.
15 kHz
IF filters are centered
around 10.7 MHz.
230 kHz
Reference Assembly
Variable Freq.
Notch Filter
10 MHz from
Agilent 8924E: FM Demod Only
AM Demod
SSB Demod
FM Demod
Signaling Source Analyzer
RMS
Detector
AUD MONITOR OUTPUT (Rear panel)
Measurement Assembly
Audio Analyzer 1 Assembly (A35)
Selectable
High-Pass
Filters
DC Volts and
Audio Frequency
Measurements
VOLUME
AUDIO IN
(front panel)
Selectable
Low-Pass
Filters
40
S:\agilent\8924e\ALR\book\chapters\intro.fm
Introduction
Theory of Operation
CDMA Signal
Analysis
The 114.3 MHz IF also goes to the LO/IF Demod (A13) assembly. This
assembly provides a path to the Spectrum Analyzer (A32) for all RF
signals, and also provides down conver sion for CDMA signals.
To do wnconvert the CDMA signal, the 114.3 MHz IF is mixed with a
117.9864 MHz LO to produce a 3.6864 MHz IF. (The LO signal is from
an oscillator that is phase locked to a 10 MHz signal from the CDMA
Reference module.)
The 3.6864 MHz signal goes to the Receiver DSP (A12) assembly, and
also goes through a variable-gain IF Amplifier and an IQ Demodulator.
The demodulator provides I and Q baseband signals to the Cell Site
Digital (A7 & A9) assemblies.
Under control from the Protocol Processor (A6) assembly, the Cell Site
Digital assemblies use the IQ information to set up and maintain calls
to CDMA phones. The Cell Site Digital 1 assembly also furnishes
feedback to the LO/IF/DEMOD assembly to control the level of the
variable-gain IF Amplifier into the demodulator.
The Receive DSP assemblies analyze the 3.6864 MHz signal to make IQ
modulation measurements, such as Rho, Timing Accuracy, Carrier
Feedthrough, and Phase Error.
114.3MHz IF
from Receiver
RF Signal
Generation
LO/IF Demod Assembly (A31)
3.6864 MHz
117.9864 MHz
Demodulator
The Signal Generator Synthesizer (A24) assembly creates a 500-1000
MHz signal. The reference signal for the synthesizer is supplied by the
Reference (A27) assembly . The synthesizer’s frequency is varied using a
divider network in the feedback circuit of the phase locked loop. Any
FM modulation signal (from the Modulation Distribution (A34)
assembly), and the frequency sweep signal for the Spectr um Analyzer
and Tracking Generator, are integrated into this feedback loop. If a
CDMA signal is not being generated, the 500-1000 MHz signal is
passed through the I/Q Modulator (A25) assembly, bypassing the I/Q
modulator.
IQ
IF Gain Control
I data
Q data
To Spectrum Analyzer (A32)
Cell Site Digital Assemblies
IQ Decoding and CDMA Generator
Data Coding
(A7,A9)
Processor (A6)
Receive/DSP Assembly (A12)
CDMA IQ Modulation
Measurements
Protocol
Call Setup and
Control
Chapter 2 41
Introduction
Theory of Operation
IQ Modulation If a CDMA signal is being generated, the signal is I/Q modulated in the
I/Q Modulator assembly, using data from the Cell Site Analog (A8)
assembly. The Cell Site Analog assembly gets its data from the two Cell
Site Digital (A7 & A9) assemblies, which are controlled by the Protoco l
Processor (A6) assembly. Up to eight code channels of CDMA
modulation data and noise may be summed into the IQ modulator at
one time. These channels provide phone paging, synchronization, voice
(traffic) tran smission, and othe r CDMA system functi o n s.
Final Frequency
Conversion and
Leveling
RF and DUPLEX
Outputs
The Output (A26) assembly performs three tasks:
• Mixes or divides the 500-1000 MHz signal to produce signals below
500 MHz (down to 30 MHz). A 1 GHz LO from the Reference (A27)
assembly is used for mixing.
• Provides AM modulation (when selected).
• Controls the signal level out of the assembly using an Automatic
Level Control (ALC) loop.
The signal out of the Output assembly is now at the user-selected
frequency, and contains any modulation that was selected (AM, FM, or
CDMA), or is a continuous wave (CW) signal. The level has been
adjusted to provide the required level (after going through the Input
(A5) assembly).
The Input assembly receives the signal from the output assembly and
routes it to the selected output por t: RF IN/OUT or DUPLEX OUT. The
signal first goes to a variable attenuator for level control. If the
DUPLEX OUT port is selected, th e signal then goes directly to that port
without additional attenuation. I f the RF IN/O UT port is used as an
output, the signal passes through additional attenuation before
reaching the port. This is why a greater signal level can be output
through the DUPLEX OUT port than through the RF IN/OUT port.
42
S:\agilent\8924e\ALR\book\chapters\intro.fm
Introduction
Theory of Operation
1 MHz from
Reference
Assembly
FM Mod. from
Mod. Dist.
Spec. Analyzer
Sweep
500-1000 MHz
Signal Generator Synthesizer (A24)
500-1000 MHz
div/n
Protocol
Processor
(A6)
Cell Site
Digital 1
(A9)
Cell Site
Digital 2
(A7)
4 channels of
1 channel of
Output Assembly (A26)
500-1000 MHz
250-500 MHz
div/2
250 kHz-250 MHz
1 GHz from Reference Assembly
RF Amplitude
Adjust fro m
Host Controller
IQ Modulator Assembly (A25)
I/Q Modulator
AWGN (Noise) from
CDMA Reference
I&Q data
I&Q data
Amplitude
Modulator
Automatic
Level Control
Distribution Assembly.
&
ADC
Summing
RF
Amp
AM from Mod.
Cell Site
Analog (A8)
Input Assembly (A5)
Variable
Attenuator
DUPLEX
OUT
RF IN/OUT
To the Receiver
Assembly
Chapter 2 43
Introduction
Troubleshooting Strategy
Trouble shooting Strategy
You can repair the Test Set yourself or send it to your local Agilent
Customer Service Center. Before starting a repair, you should become
familiar with basic Test Set operation using the User’s Guide .
Troubleshooting relies on built-in diagnostics. Because some diagnos tic
results may be ambiguous, further interpr etation and testing may be
required. There are several diagnostic routines built into the T est Set:
• Power-up s elf-test diagnostics to test controller functioning. These
are automatically run when the instrument is turned on, and can
also be run after the instrument has been on.
• RF (Radio Frequency) assembly diagnostics.
• AF (Audio Frequency) assembly diagnostics.
• Digital assembly diagnostics for CDMA signals.
Troubleshooting hints in this manual include:
chapter 3 , "Troubleshooting"Instructions on how to begin
•
troubleshooting (see ).
• Block diagrams and theory of operation (see
Diagrams"
).
• Detailed information about the built-in diagnostics (see
"Diagnostics Descriptions"
).
chapter 13 , "Block
chapter 16 ,
• Error message explanations (see Appendix A: Error Messages) .
44
S:\agilent\8924e\ALR\book\chapters\intro.fm
Repair Process
Repairing the Test Set consists of:
Introduction
Repair Process
• Ident ifyi n g th e fa u lty assembly (see
chapter 3 , "Troubleshooting")
• Ordering a replacement assembly (see
or chapter 15 , "8924E Replaceable Parts")
Parts"
• Replacing the faulty assembly (see
• Downloading calibration data (see
• Performing periodic calibration (see
• Verifying Test Set performance (see
Verification"
or chapter 8 , "8924E Performance Verification")
chapter 4 , "Repair")
chapter 4 , "Repair")
chapter 5 , "Periodic Adjustments")
chapter 7 , "8924C Performance
chapter 14 , "8924C Replaceable
Chapter 2 45
Introduction
Calibration and Performance Verification
Calibration and Performance Verification
The Tes t Set periodically requires some maintenance to verify that it
meets its published specifications. Periodic Adjustments (calibration)
consists of running several built-in cali bration programs , and should be
performed every year. An external frequency counter and dc voltmeter
are required. (See
The Performance Verification tests in chapters 5 (Agilent 8924C) and 6
(Agilent 8924E) verify that the Test Set performs as indicate d in the
Specifications. These tests should be performed if the Test Set’s
operation is suspect, even though it passes all internal diagnostic
checks. This ident i fies whether a problem actually exists in the Test
Set, or if an application problem exists outside of the Test Set.
Several assemblies, when replaced, require running specific periodic
calibration procedures to crea te calibration factors for that assembly. In
other cases, the ca l i b ration data w il l be in cl u ded with the replacemen t
assembly on a memory card. Instructions that come with the
replacement assembly explain how to downl oad the calibration data.
(This is not considered part of periodic calibration.)
chapter 5 , "Periodic Adjustments").
NOTE When troubles h oo t i n g the Test Set, it is somet i me s de si r a b le to swap a
known-good assembly (perhaps from another Test Set) for a
suspected-fau l t y as se mb l y. If the swapped assembly requires
calibration data, most assemblies will operate well enough with the
original assembly’s calibration data to troubleshoot and run the
diagnostics. However, do not expect the Test Set to meet its
specifications . Also, some assemblies may appear to fail because of the
incorrect ca l i b ration data.
46
S:\agilent\8924e\ALR\book\chapters\intro.fm
Introduction
Hardware and Firmware Enhancements
Hardware and Firmware En h an c e me n t s
The hardware and firmw a re of the Test Set are enhanced on a
continuous basis. If an assembly is replaced, it is recommended that the
firmware be upgraded at the same time. This is important if an
assembly-level repair is performed because e xchange a ssemblies , whic h
may be of a later revision than the one being replaced, may require a
later revision of the firmware to function correctly.
Chapter 2 47
Introduction
Hardware and Firmware Enhancements
48
S:\agilent\8924e\ALR\book\chapters\intro.fm
3 Troubleshooting
This chapter tells how to isolate a problem to the defective assembly.
Troubleshooting is centered around the built-in diagnostics. If
diagnostics can’t identify the faulty assembly, supplementary
information in the form of detailed Block Diagrams , Diagnostics
Descriptions, and descriptions of Error Messages are provided.
49
Troubleshooting
How to Troubleshoot the Test Set
How to Troubleshoot the Test Set
This section expl ains the steps for troubleshooting the Test Set. Document the
result of each step in case you need to contact Agilent Technologies for service
assistance.
NOTE Are you sure a problem exists?
Before troubleshooting the Test Set, you should attempt to duplicate the
problem by performing the application where the suspected failure occurred.
This is especially important if the Test Set is being used in a new application
where misapplication, or incorrect operation of the Test Set may be involved.
If the Test Set fails in an application where it has worked correctly before, and
the unit-under-test is working correct ly, a failure probably exists.
Step 1- Run the Power-up Diagnostic
On power-up, the Test Set runs a Self-Test Diagnostic. Most
of the Test Set’s digital control functions are tested. The
outcome of the test appears on the CRT (if operating) and on
four LEDs under the top cover.
Step 2- Run the Functional Diagnostic Routines
The RF, AF, Miscellaneous, and Digital diagnostic routines
verify the proper operation of most assemblies in th e Test
Set. If a problem is found, the suspected faulty assembly is
indicated, along with the level of confidence that replacing
the indicated module will correct the problem.
Step 3- Run the Periodic Calibration Routines
Operating parameters may drift over extended periods.
Built-in calibration routines adjust certain data latch
settings to assure optimal Test Set operation. Applications
requiring operation at the limits of Test Set’s performance
may fail if the Test Set is not calibrated.
Step 4- Manual Troubleshooting
Suggestions of things to try inc lude: using P erfo rmance T e sts
to verify specified operation, and swapping assemblies.
These steps are illust rat ed on the ne xt page. Instructions for performin g the se
steps are given in this chapter.
50 S:\agilent\8924e\ALR\book\chapters\trouble.fm
Figure 3-1 Troubleshooting Flowchart
If the Test Set powers-up normally, duplicate the application where the problem
exists to determine if the Test Set is not being used properly or is being used
beyond its warranted specifications
Troubleshooting
How to Troubleshoot the Test Set
Does an image
appear on the
display?
Yes
Do Power-up
Diagnostics detect
a failure?
No
Run the Functional
Diagnostic ro ut in es.
Do diagnostics
indicate a fa ilure?
No
Run the automated Periodic
Adjustment/Calibration routine.
Are any problems indicated
while cali brating?
No
Yes
Yes
Refer to figure 3-3, "Trou b l eshooting a Blank Display," on page
59
.
Refer to "Diagnostics Descriptions" on page 525 and the
Error Messages information for probable causes.
If the reported confidence is high, replace the indicated assembly and re-test. If
confidence is medium or low, perform additional checks (detailed in this chapter)
to verify the failure.
Yes
Refer to the Periodic Adjustments Chapter and "Error
Messages" on page 599
for probable causes.
Perform any applicable
performance tests.
Performance
test(s) fail ed?
No
Chapter 3 51
No
Yes
Refer to the Block Diagrams to isolate the failure; replace the suspected
assembly and re-test.
Troubleshooting
How to Troubleshoot the Test Set
Step 1- Run the Power-up Diagnostics
To start troubleshooting:
• Turn on the Test Set to automatically run the power-up diagnostics.
• After power-up, the top line of the Test Set’s display should show copyright
information and the firmware revision code. The second line should display
All self tests passed.
• The CDMA CALL CONTROL screen should be displayed. Two conditions
cause a different screen to be displayed on power-up:
❏ A SAVE/RECALL register named POWERON was saved to
automatically power-up the box in a different state. Press the PRESET
key before proceeding; this will restore the Test Set to the factory
power-up condition.
❏ The Autostart Test Procedure on Power-Up: field is set to On to
automatically run a loaded program. Press the SHIFT key, then press
the CANCEL key to stop the program. Press the PRESET key to restore
the Test Set to the factory power-up condi tio n.
• To turn the autostart function off, press the TESTS key, then select
Execution Cond function (under the SET UP T EST SET: heading). The
autostart function is at the bottom of the screen; turn it Off.
If All self tests passed is displayed, run the Functional Diagnostics to try
to locate the fault.
If the Test Set powers up with an error condition, or if the screen is blank:
"More About Step 1- Run the Power-Up Diagnostic" on page 58
.
See
52 S:\agilent\8924e\ALR\book\chapters\trouble.fm
Troubleshooting
How to Troubleshoot the Test Set
Step 2- Run the Functional Diagnostics
The Functional Diagnostics make measurements that test many internal
circuits. There are four Functional Diagnostics. The Audio, RF, and CDMA
diagnostics can be run in a loop mode (CDMA diagnostics: only single test s are
loopable) after an initial setup. This is useful for trapping intermittent
failures. The fourth diagnostic (Miscellaneous Diagnostics) requires a different
setup for each test.
Functional Diagnostics should pinpoint faults in the AF, RF, and
CDMA-related circuits to the faulty assembly. When a measurement is
out-of-limits, the diagnostics post a message suggesting which assembly to
replace and the certainty (low, medium, or high) of that suggestion. Before
ordering replacement parts (especially when the cert ainty is medium or low) o r
if you have difficulty in understanding or running the Functional Diagnostics,
See "More About Step 2- Run the Functional Diagnostics" on page 60.
Chapter 3 53
NOTE
Troubleshooting
How to Troubleshoot the Test Set
The measurement limits of the Functional Diagnostic tests are valid only at
room temperature; that is, 20 to 25°C or 65 to 75°F.
1. Press the PRESET key.
2. Press the TESTS key.
3. Set the Select Procedure Location: field to ROM.
4. Set the Select Procedure Filename: field to load one of the diagnostic
routines.
• AFDIAGS3 (to run the Audio Diagnostics)
• RFDIAGS3 (to run the RF Diagnostics)
• MSDIAGS3 (to run the Miscellaneous Diagnostics)
• CDMADIAG (to run the CDMA Diagnostics)
5. Under the SET UP TEST SET: area, select Execution Cond to access the
TESTS (Execution Conditions) screen.
6. Set Output Results To:
• Crt to view measurements only on the display.
• Printer to print the test results as well as display them on the CRT.
The printer is configured later in this procedure
7. Under Output Results For:
• Select All to display (and print) all test information.
• Select Failures to only display (and print) failed test points.
8. Under If Unit-Under-Test Fails:
• Select Continue to continue to the next test point.
• Select Stop to pause testing at that point.
9. Under Test Procedure Run Mode:
• Select Continuous to run the tests continuously.
• Select Single Step to pause after each measurement.
10.Under Autostart Test Procedure on Power-Up:, verify that the
setting is Off.
54 S:\agilent\8924e\ALR\book\chapters\trouble.fm
NOTE Configure a Printer
Only perform this next step if you want to print test results to a printer,
otherwise go to step 16.
11.Press the TESTS key to return to the TESTS (Main Menu) screen.
12.Under SET UP TEST SET:, select Printer Setup to access the TESTS
(Printer Setup) screen.
13.Under PRINT SETUP:, select the Model: of printer to use.
14.Set the Printer Port: for the rear-panel connector your printer is
connected to.
If an GPIB printer is used, you need to enter the printer’s two-digit bus
address when the Printer Adrs field appears (Example; enter 01 for bus
address 701). Also, press the SHIFT key, then the PREV key to access the
I\O CONFIGURE screen, and set the Mode field to Control.
15.Under PAGE CONTROL:, set the Lines/Page: and Form Feed (FF at
Start:, and FF at End:) parameters if necessary.
Troubleshooting
How to Troubleshoot the Test Set
Begin Testing 16.Select the Run Test field (or press K1) and wait for the “Loading
program - Enter SHIFT-CANCEL to abort.” message to go away.
17.Choose the test or tests to run by selecting Up or Down to move the pointer
and then choosing Select. When running the Audio, RF, or CDMA
diagnostics for the first time, you should run “All xxx Tests”
(xxx=Audio, RF, or CDMA).
18.Follow the instructions on the screen.
19.As the tests run, you can alter test execution conditions by selecting:
• Loop to run the test continuously.
• Pause to pause the tests.
• Stp Fail (stop-on-failure) to pause the tes ts when a failure is detected.
• Sgl Step (single-step) to pause the test after each measurement.
Chapter 3 55
Troubleshooting
How to Troubleshoot the Test Set
Figure 3-2 Running the Functional Diagnostics
1
2
5
USER
K1
K2
K3
K4
K5
56 S:\agilent\8924e\ALR\book\chapters\trouble.fm
How to Troubleshoot the Test Set
If all Functional Diagnostics pass:
Verify that the Test Set is functioning. Go to step 3 below.
If any Functional Diagnostic fails:
See "More About Step 2- Run the Functional Diagnostics" on page 60.
Step 3 - Verify Test Set Functions
Suggestions:
Troubleshooting
• Run all or a sel ected grou p of the P erforma nce T est s. Se e
Verification
• Run selected Periodic Calibration procedures. See Periodic Adjustments.
or 8924E Performance Verification
8924C Performance
• Swap suspected assemblies with known-good ones. See "Swapping
Known-Good Assemblies" on page 73
.
Chapter 3 57
Troubleshooting
More About Step 1- Run the Power-Up Diagnostic
More About Step 1- Run the Power-Up Diagnostic
If the Test Set powers up with the message:
”All self tests passed.” it is still possible to have the following digital
problems:
• Intermittent failure in any digital assembly.
• Input or output failure on any I/O port of the A14 Host Serial I/O assembly.
• Key failure (other than stuck keys) on the A1 Keyboard.
If all Self-Test Diagnostics pass, and the front-panel keys and knob wo rk, you
can assume that the digital control assemblies work.
If the Test Set powers up with the message:
”One or more se lf-tests faile d. Error code:<he xadecimal erro r
code>”:
details on troubleshooting with the Self-Test Diagnostic.
See "Diagnostics Descriptions," in chapter 16, on page 525 for further
If the Test Set fails to power-up at all:
• If there is no image on the display, see
Display," on page 59
• If an error message appears and remains in the center of the display, or if
the Test Set does not respond to any keys or GPIB commands, the Test Set
may be configured to power-up to a custom procedure (rather than the
default screen) and that procedure may have errors. This feature is
initiated by setting Autostart to On from the TESTS (Execution
Conditions) screen. To correct this fault, turn the power off, then the power
on while holding down the MEAS RESET and Hz keys until an image
appears on the screen. Note: this will erase all existing
programs and Save/Recall settings.
• If the Test Set does not power-up properly, but the fan operates and the
power supply voltages are correct on the Filter regulator (A20) outputs , the
Host Controller (A16) may be failing. It may be possible to run the Self-Test
Diagnostic and rea d the te st re sult s usi ng t he diag nost i c LEDs on the Host
Controller assembly .
for details.
.
See "Diagnostics Descriptions," in chapter 16, on page 525
figure 3-3, "Troubleshooti ng a Blank
58 S:\agilent\8924e\ALR\book\chapters\trouble.fm
More About Step 1- Run the Power-Up Diagnostic
Figure 3-3 Troubleshooting a Blank Display
Power up with
cover on.
Look through the rear panel for a
No
Fan runs?
Yes
lit LED on the Power Supply. If the
LED is not lit, the Power Supply is
faulty or is not getting mains power.
Troubleshooting
Beeps?
Yes
Remove instrument cov er and the
cover over the A16 Host
Controller. Turn power off then
back on.
LEDs DS1 to DS4
on A16 light on
power up?*
LED flash sequence
indicates faulty CRT
Drive (A22)*
No
Power up again. Is
the intensity normal
then fades out?
No
At power down does
the display flash?
No
Yes
No
Yes
No
Remove the instrument cover and the cover over the A16 Host Controller. Turn
power off then back on. Check TP 2 (top edge of A16) for +5V . If +5V is present,
the A16 assembly is faulty.
Controller (A16) or memory
bad (A17).
*The LEDs should all come on immediately after
power up, and then go off several secon ds after a beep is heard.
Replace the CRT Drive (A22) assembly
*The power up diagnostic LED sequenc e
is described in chapter 11 - Diagnostics Descriptions.
Press [SHIFT] [TESTS] [7]
[ENTER].
Faulty interconnect cable or bad
high voltage power supply (A23)
or CRT (A3).
Yes
Check rear-panel
CRT VIDEO
OUTPUT. Video Ok?
Yes
Faulty CRT (A3).
500 mV/div
No
Faulty CRT drive (A22).
500 µ s /d iv
Chapter 3 59
Troubleshooting
More About Step 2- Run the Functional Diagnostics
More About Step 2- Run the Functional
Diagnostics
USER Keys
The numbered control fields in the upper-right corner of the TESTS screens
correspond to the USER keys to the right of the screen.
Frequently Encountered Error Messages
Error messages that appear on the second line of the Test Set’s display
frequently occur while the Functional Diagnostics are running. The most
complete and general list of error messages is in the Error Messages chapter of
the Test Set’s User’s Guide . Some messages relating specifically to
troubleshooting can be found in the Error Messages chapter of this manual.
Some of the messages you can expect to occur while running the Functional
Diagnostics are as foll ows:
Functional Diagnostics measurements commonly generate the message
”Direct latch w rite occu rred. Cy cle po wer when done se rvicing.”
The message appears the first time the diagnostic program directly addresses
a latch. The message sho uld b e ignore d unti l yo u wis h t o make a normal (n ot a
diagnostic) measurement with the Test Set. To clear this message the Test Set
should be turned off and back on again.
The message ”Printer does not respond.” usually indicates that one or
more settings on the TESTS (Printer Setup) screen are set wrong for your
printer . Also, check that the printer’s power is on and that it is correctly cabled.
For GPIB printers make sure the printer is correctly addressed. If a serial
printer is used, you may have to change the serial communication settings on
the I/O CONFIGURE screen (press SHIFT then PREV to get to this screen).
The message times-out after a few seconds, and the output destination is
changed to CRT by the program.
60 S:\agilent\8924e\ALR\book\chapters\trouble.fm
Troubleshooting
More About Step 2- Run the Functional Diagnostics
Some error messages you might encounter when running the Functional
Diagnostics are the following:
”ERROR 173 IN X XXX Activ e/system contr oller re q’d” (where ”XXXX”
represents a line number) indicates that the Test Set’s internal IBASIC
computer must be set as a system controller for some reason. This usually
indicates that the Printer Port field of the TESTS (Printer Setup) screen was
set to GPIB but the Mod e field on the I/O CONFIGURE screen is set to
Talk&Lstn instead of Control. Change the mode setting to Control and run
the diagnostic again.
Timeouts
Certain failures may cause a frequency or voltage reading to timeout, that is,
the time required for the measurement will be unreasonably long. If a timeout
occurs, measurement execution will stop and an error message will be
displayed.
• If frequency or voltage readings have been successfully made before the
timeout, the assembly currently being tested or a multiplexer on the A37
Measurement asse mbly may be at fault.
• If most measurements fail, the A27 Reference assembly may be faulty in
supplying clock signals to the A37 Measurement assembly.
• Re-run the test to see if the timeout is intermittent.
The Four Functional Diagnostics
The Functional Diagnostics are contained in four independent program files.
Before ordering a replacement assembly based on the diagnostics, you should
read the descriptions of the diagnostic tests.
Descriptions"
. See also Block Diagrams.
See chapter 16, "Diagnostics
Chapter 3 61
Troubleshooting
More About Step 2- Run the Functional Diagnostics
Audio Diagnostics (AFDIAGS3)
This program tests the audio functions of the follow ing assemblies:
• A36 Audio Analyzer 2
• A35 Audio Analyzer 1
• A34 Modulation Distribution
• A15 Signalling Source/Analyzer (AF Generators 1 and 2 only)
• A37 Measurement (only a few selected inputs)
After initial cabling, all tests can be run in a loop mode without further
intervention. This makes it easier to catch intermittent failures.
NOTE The measurement limits of the Functional Diagnostic tests are valid only at
room temperature; that is, 20 to 25° or 65 to 75°F.
When a test fails, a diagnosis is given in three parts:
• A diagnostic code.
• The name of the assembly or assemblies most likely to have failed.
• A rating (high, medium, or low) of the confidence of the diagnosis.
Before ordering an assembly based on the diagnosis, you should read the
description of the diagnos tic test and details of the diagnosis based on the
diagnostic code.
See chapter 16, "Diagnostics Descriptions".
62 S:\agilent\8924e\ALR\book\chapters\trouble.fm
Troubleshooting
More About Step 2- Run the Functional Diagnostics
RF Diagnostics (RFDIAGS3)
This program tests the RF functions of the following assemblies:
• A19 Receiver 1st Mixer
• A26 Output
• A24 Signal Generator Synthesizer
• A27 Reference
• A30 Receiver
• A28 Receiver Synthesizer
• A32 Spectrum Analyzer
• A5 Input
Some tests require cabling before the RF Diagnostics can be run; but all
tests can be run in a loop mode without further intervention. Running in
loop mode makes it easier to catch intermittent failures.
Chapter 3 63
Troubleshooting
More About Step 2- Run the Functional Diagnostics
NOTE The measurement limits of the Functional Diagnostic tests are valid only at
room temperature; that is, 20 to 25°C or 65 to 75°F.
When a test fails, a diagnosis is given in two parts:
• The name of the assembly or assemblies most likely to have failed.
• A rating (high, medium, or low) of the confidence of the diagnosis.
The diagnosis given by the RF Diagnostics should be verified by other means
before ordering and replacing parts. This particularly applies to the Spectrum
Analyzer , Receiver, and Receiver Mixer assemblies. Some suggestions for doing
this are as follows:
• Become familiar with the block diagram and theory of operation of the
assemblies in
Block Diagrams.
• Read the description of the diagnostic test in
• Follow the suggestio n s in
this chapter.
Miscellaneous Diagnostics (MSDIAGS3)
This program verifies the following:
• The ability of the A27 Reference to detect the presence of the A29 CDMA
Reference signal and its ability to lock to that signal.
• The integrity of the front-panel RF IN/OUT, DUPLEX OUT, and ANT IN
connectors.
• The Self-Test Diagnostics, and power supply voltages. The Self-Test
Diagnostics are described in detail in
• Serial bus communication
The Miscellaneous Diagnostics cannot be run in a loop mode.
"Further Isolating RF Failures" on page 75 later in
"Diagnostics Descriptions " on pag e 525.
Diagnostics Descriptions.
64 S:\agilent\8924e\ALR\book\chapters\trouble.fm
Troubleshooting
More About Step 2- Run the Functional Diagnostics
CDMA Diagnostics (CDMADIAG)
This program tests the following parameters:
• CDMA Reference (A29): 20MHz VCXO tune voltage and phase-lock status,
19.6608MHz VCXO tune voltage and phase-lock status, and AWGN (noise)
source’s status.
• LO/IF Demod (A31): 117.9864MHz local oscillator (LO) bias and tune
voltage, 3.686MHz IF sense, 114.3MHz IF sense, Spectrum Analyzer path
sense, supply voltages references, and IQ Demodulator LO tune voltage and
sense.
• IQ Modulator (A25): RF Input de tection, IQ output detection, baseband I
and Q detection, I signal gain, various modulator control levels.
• Cell Site Analog (A8): Cell Site 1&2 video DAC references, Cell Site 1 I and
Q gain control DAC voltage, I and Q summing amplifier outputs.
Chapter 3 65
Troubleshooting
More About Step 2- Run the Functional Diagnostics
Troubleshooting Aids
Refer to following table to determine which Diagnostic Tests, Performance
Tests , and Periodic Self Calibration Adjustments apply to an assembly.
Downloading calibration data is discu s sed in "Repair," on page 79.
Table 3-1 Relating Assemblies To Troubleshooting Aids
Ref.
Des.
Assembly
Name
Troubleshooting with
Diagnostics (Chapter 2)
ROM
Performance
Verification
Periodic
Adjustments
Cal
Cal-Data
Needed
After
Repl ?Power-Up
Self
a
Tests
Firmware
Upgrade
PCB_CAL
Channel
No
Power Cal
A1 Keyboard X MS DIAGS3:
No
(Self Test)
A2 Keyboard
No
Filters
A3 CRT No
A4 Attenuator MS DIAGS3:
Yes
(RF In/Out)
A5 Input RF DIAGS3:
(Input)
RF Generator
(Level
Accuracy)
Receiver
b
Mixer
Attenuator
Yes
Generic Cable
A6 Protocol
Processor
A7 Cell Site
Digital 2
A8 Cell Site
Analog
A9 Cell Site
Digital 1
A10 Vocoder
(Option)
A11 DSP
Receiver
(Optional)
A12 DSP
Receiver
X MS DIAGS3:
No
(Self Test)
X MS DIAGS3:
PCB_CAL No
(Self Test)
CDMADIAG
(Cell Site)
Power Sensor
Zero
Yes
PCB_CAL
X MS DIAGS3:
PCB_CAL No
(Self Test)
No
No
66 S:\agilent\8924e\ALR\book\chapters\trouble.fm
More About Step 2- Run the Functional Diagnostics
Table 3-1 Relating Assemblies To Troubleshooting Aids (Continued)
Troubleshooting
Ref.
Des.
Assembly
Name
Troubleshooting with
Diagnostics (Chapter 2)
ROM
Self
a
Tests
A14 Host Serial
I/O Interface
A15 Signaling
Source/
Analyzer
XMSDIAGS3:
(Self Test)
XAFDIAGS3:
(Audio
Frequency
Generators 1
and 2)
A16 Host
Controller
XMSDIAGS3:
(Self Test)
A17 Memory X MSDIAGS3:
(Self Test)
A19 Receiver 1st
Mixer
A20 Filter/
Regulator
RFDIAGS3:
(Receiver)
MSDIAGS3:
(Self Test)
Performance
Verification
Periodic
Adjustments
Cal
Receiver
Mixer
Cal-Data
Needed
After
Repl ?Power-Up
No
No
No
No
Yes
No
A21 Fan No
A22 CRT Drive X MSDIAGS3:
No
(Self Test)
A23 Power
Supply
MSDIAGS3:
(Self Test)
No
Connections
A24 Signal
Generator
Synthesizer
A25 I/Q
Modulator
A26 Output RFDIAGS3:
RFDIAGS3:
(Signal
Generator
Synthesizer)
CDMADIAG
(I/Q Mod)
(Output)
RF Generator:
(Harmonic
and Spurious
Purity)
AF Generator:
(AM
I/Q Mod
PCB_CAL
Attenuator
Generic Cable
Yes
Yes
Yes
Accuracy)
A27 Reference RFDIAGS3:
(Reference)
A28 Receiver
Synthesizer
RFDIAGS3:
(Receiver
RF Generator:
(Residual FM)
RF Analyzer:
(Residual FM)
Timebase
Reference
Yes
Yes
Synthesizer)
Chapter 3 67
Troubleshooting
More About Step 2- Run the Functional Diagnostics
Table 3-1 Relating Assemblies To Troubleshooting Aids (Continued)
Ref.
Des.
Assembly
Name
Troubleshooting with
Diagnostics (Chapter 2)
ROM
Self
a
Tests
A29 CDMA
Reference
CDMADIAG
(CDMA Ref)
A30 Receiver RFDIAGS3:
(Receiver)
A31 LO/IF
Demod
CDMADIAG
(LO/IF
Demod)
A32 Spectrum
Analyzer
(8924E
RFDIAGS3:
(Spectrum
Analyzer)
Option)
A33 Control
Interface
XMSDIAGS3:
(Self Test)
Performance
Verification
RF Analyzer:
(AM Accuracy
and FM
Accuracy)
Spectrum
Analyzer
Periodic
Adjustments
Cal
Power Sensor
Zero
PCB_CAL
Receiver
Mixer
Receiver
Mixer
Receiver
Mixer
Cal-Data
Needed
After
Repl ?Power-Up
Yes
Yes
No
Yes
Yes
A34 Modulation
Distribution
AFDIAGS3:
(Mod
Distribution
Internal
Paths)
AF Generator:
(AC Level
Accuracy)
AF Gen Gain
EXT Mod
Path Gain
Audio
Analyzer
No
Offset
A35 Audio
Analyzer 1
AFDIAGS3:
(Audio
Analyzer 1
Audio
Analyzer
Offset
No
Internal
Paths)
A36 Audio
Analyzer 2
A37 Measuremen
c
t
A38 Oven
Oscillator
XMSDIAGS3:
AFDIAGS3:
(Audio
Analyzer 2)
(Self Test)
AF Analyzer
VFN (a must) Yes
(AC Voltage
Accuracy)
Oscilloscope Voltmeter
Reference
Timebase
Adjust
Yes
No
A39 37-Pin Filter No
A40 Motherboard No
68 S:\agilent\8924e\ALR\book\chapters\trouble.fm
Troubleshooting
More About Step 2- Run the Functional Diagnostics
a. Besides checking the assemblies marked X, the power-up self test checks the serial data
lines which the controller uses to send control s ignals t o and re ceive status si gnals from t he
RF and AF assemblies.
b. Agilent 8924E: Required if Spectrum Analyzer is installed.
c. Measurement checked indirectly by all diagnostics.
Chapter 3 69
Troubleshooting
Step 3- Verify Test Set Functioning
Step 3- Verify Test Set Functioning
See "Locating the Out-of-Lock (OOL) Indicators" on page 70
Out-of-lock (OOL) LEDs light when a phase-locked loop inside an assembly is
failing. The Signal Generator Sy nthesizer (A24), Receiver Synthesizer (A28),
CDMA Reference (A29), and LO/IF Demod (A31) assemblies have these LEDs
mounted close to the top of the modules. The location of each LED is labeled on
the assembly.
Figure 3-4 Locating the Out-of-Lock (OOL) Indicators
RCVR SYNTH
SIG GEN SYNTH
CDMA REFERENCE (2)
LO/IF DEMOD(2)
70 S:\agilent\8924e\ALR\book\chapters\trouble.fm
Troubleshooting
Step 3- Verify Test Set Functioning
Isolating Out-of-Lock Conditions
If more than one OOL indicator is lit.
CDMA Reference and LO/IF Demod: If the CDMA Reference is unlocked, the
LO/IF Demod assembly will be unlocke d, since its reference comes from the
CDMA Reference. Verify that the CDMA Reference (A29) is working correctly
before troubleshooting the LO/IF Demod assembly.
Receiver Synthesizer and Signal Generator Synthesizer: If both assemblies are
unlocked, the Reference (A27) is the probable cause, since it provides the
reference for both assemblies.
CDMA Reference (A29) Unlocked
1. Verify that the rear-panel 10 MHz Oven Out signal is at 10 MHz and at a
level of 0 dBm ±3 dB into 50
2. Connect a BNC cable between the 10 MHz Oven Out and REF IN BNC
connectors.
3. Press the SHIFT key, then press the TESTS key to access the CONFIGURE
screen.
Ω.
4. Set the External Reference field to10.0000 MHz (if not already set).
5. If the OOL indicator is lit on the CDMA Reference (A29) assembly, replace
the assembly and re-test.
LO/IF Demod (A31) Unlocked
This assembly is phase-locked to a signal from the CDMA Reference. If the
CDMA Reference is out-of-lock, troubleshoot that assembly first before
proceeding.
1. Turn the Test Set off.
2. Remove the rear assemblies cover (two assembly pry tools are removed in
the process).
3. Use the pry tools to remove the LO/IF Demod assembly.
4. Turn the Test Set on.
5. V erify that a 10 MHz signal of about 0 dBm is present on pin 19 of J72. This
is the reference signal from the CDMA Reference assembly.
6. If the signal is present, replace the LO/IF Demod assembly.
If the 10 MHz signal is not present, an open or shorted trace on the
Motherboard assembly (A40) may be the cause. Check for continuity between
J72 pin 19 (under the LO/IF Demod assembly) and J69 pin 19 (under the
CDMA Reference assembly), and verify that the trace is not shorted to ground.
Chapter 3 71
Troubleshooting
Step 3- Verify Test Set Functioning
Receiver Synthesizer (A28) Unlocked
1. Turn the Test Set off.
2. Remove the rear assemblies cover (two assembly pry tools are removed in
the process).
3. Use the pry tools to remove the Receiver Synthesizer assembly.
4. Turn the Test Set on.
5. V erify that a 1 MHz signal of about - 1 dBm is present on pin 3 of J40. This
is the reference signal from the Reference assembly.
6. If the signal is present, replace the Receiver Synthesizer assembly.
If the 1 MHz signal is not present, the Reference (A27) assembly is probably
faulty. It is also possible that an open or shorted trace on the Motherboard
assembly (A40) exists. Check for continuity between J40 pin 3 (under the
Receiver Synthesizer) and J34 pin 2 (under the Reference assembly), and
verify that the trace is not shorted to ground.
Signal Generator Synthesizer (A24) Unlocked
1. Turn the Test Set off.
2. Remove the rear assemblies cover (two assembly pry tools are removed in
the process).
3. Use the pry tools to remove the Receiver Synthesizer assembly.
4. Turn the Test Set on.
5. Verify that a 1 MHz signal of
the reference signal from the Reference assembly.
6. If the signal is present, replace the Signal Generator Synthesizer assembly.
If the 1 MHz signal is not present, the Reference (A27) assembly is probably
faulty. It is also possible that an open or shorted trace on the Motherboard
assembly (A40) exists. Check for continuity between J31 pin 3 (under the
Signal Generator Synthesizer) and J34 pin 1 (under the Reference assembly),
and verify that the trace is not shorted to ground.
≥ -20 dBm is present on pin 3 of J31. This is
72 S:\agilent\8924e\ALR\book\chapters\trouble.fm
Troubleshooting
Step 3- Verify Test Set Functioning
Swapping Known-Good Assemblies
Swapping a known-good assembly for a suspected faulty assembly performed
Most swapped assemblies which use calibration data will operate well enough
with the original assembly’s calibration data to troubleshoot and to run the
diagnostics; do not expect the Test Set to meet its spec ifications. Some
assemblies may appear to fail because of incorrect calibration data. It is also
important to keep t rack of the orig inal a ssembl ies in the Test Set. If calibr ation
data is lost, the assembly will have to be sent back to the factory.
Calibration data is generally stored in a socketed EEPROM on the A16 Host
Controller . If the controller is replaced or swapped, the original EEPROM must
be put in the new Test Set’s Controller. Should the EEPROM lose its data, the
entire instrument will require a factory recalibration.
The assemblies that require down-loaded calibration data from a memory card
are:
• A19 Receiver 1st Mixer
• A26 Output
• A24 Signal Generator Sy nthesizer
• A27 Reference
• A30 Receiver
• A28 Receiver Synthesizer
• A32 Spectrum Analyzer (optional in some Test Sets)
• A37 Measurement
• A33 GPIB/RS-232/Current Sense
• A5 Input
• A4 Attenuator
Of these assemblies the A5 Input is the least likely candidate for a successful
assembly swap.
The A32 Spectrum Analyzer may also pose difficulties. To verify operation,
first set the Spectrum Analyzer’s RF Gen controls to Track, and the
Port/Sweep field to Dupl . This directs t he Tracking Generator to the DUPLEX
OUT port. Connect the DUPLEX port to the ANT IN port. Set the Main control
to Ant. Set the Center F req to 501 MHz, and the Span to 1 GHz. You should
see a (roughly) flat line across the screen, varying about 4dB. “Generator
sweep truncated” may appear - but does not indicate a problem.
Chapter 3 73
Troubleshooting
Step 3- Verify Test Set Functioning
Some assemblies require that a periodic calibration procedure be run. These
are:
• A36 Audio Analyzer 2 (variable-frequency notch filter null if present)
• A35 Audio Analyzer 1 (DC offset)
• A34 Modulation Distribution (DC offset, external amplifier gain)
• A27 Reference (time base frequency)
• A37 Measurement (voltage references)
• A29 CDMA Reference
• A31 LO/IF Demod
• A25 IQ Modulator
• A8 Cell Site Analog
For general troubleshooting, these assemblies can generally be swapped
without an immediate need of recalibration.
74 S:\agilent\8924e\ALR\book\chapters\trouble.fm
Troubleshooting
Further Isolating RF Failures
Further Isolating RF Fai lures
Isolating failures in the RF assemblies of the Test Set can be difficult. One
problem is that the RF Diagnostics sometimes use the built-in RF analyzer to
test the built-in RF source, and vice versa. This is necessary to make the
diagnostics self-contained, that is, they run without external equipment.
Before using the helps in this section, run all of the RF Diagnostics (
About Step 2- Run the Func tion al Dia gnos tics, " on page 60
to become familiar with:
• the RF source and an alyzer block diag rams and theory of oper ation in
Diagrams
• the description of the RF and Miscellaneous Diagnostic tests in Diagnostics
Descriptions
Some general-purpose, RF test equipment will be needed:
• RF signal generator
.
). It wi ll al so be h elp fu l
see "More
Block
• RF modulation analyzer or spectrum analyzer.
Isolating Input and Output Failures
If all RF diagnostic test s pass , there could sti ll be a problem with th e input and
output paths (including reverse-power and overpower protection). Run the
Miscellaneous Diagnostics test titled RF Input Output Test. A failure indicates
that the input section or front-panel connection is faulty.
Isolating the RF Analyzer
The RF Analyzer function uses the following assemblies. (Refer to block
diagrams in
Block Diagrams.)
• A5 Input
• A19 Receiver First Mixer
• A30 Receiver 1st
• A28 Receiver Synthesizer
• A32 Spectrum Analyzer
• A29 CDMA Reference and A27 Reference (for downconversion).
Chapter 3 75
Troubleshooting
Further Isolating RF Failures
To isolate an RF Analyzer problem:
• On the Test Set:
• Press PRESET.
• (8924C ONLY) Press the SHIFT key, then press the TESTS key to access
the CONFIGURE screen.
Set the RF Display field to Freq.
Set the RF Offset field to Off.
• (8924C ONLY) Locate the ANLG SCRNS (Analog Screens) group of keys
and press the TX TEST key (to go to the analog TX TEST screen).
Set the Tune Mode to Auto . This enables the Test Set to automatically
tune the receiver to a strong RF signal.
Set the Input Port to RF IN.
• On the external RF signal generator:
Set the frequency to 100 MHz CW.
Set the amplitude to 0 dBm.
Connect the output to the Test Set’s RF IN/OUT connector.
• Set the RF signal generator frequency to 100, 500, and 900 MHz. For each
frequency, the Test Set’s measurements should read as follows:
TX POWER should read approximately 0.001 W for each frequency.
TX FREQUENCY should read 100, 500, and 900 MHz respectively.
Press the SHIFT key, then press the RF GEN key to access the analog
Spectrum Analyzer . Observe the level and frequency of the signal. Press
PREV to return to the TX TEST screen.
76 S:\agilent\8924e\ALR\book\chapters\trouble.fm
Troubleshooting
Further Isolating RF Failures
Refer to the block diagrams in Block Diagrams. The down conversion
frequencies for the three input frequencies are shown in the following table.
Table 3-2
Input
Frequency
(MHz)
First LO
Frequency
(MHz)
IF From
First Mixer
(MHz)
100 714.3 614.3
500 614.3 114.3
900 758.7 114.3
Chapter 3 77
Troubleshooting
Further Isolating RF Failures
Isolating the RF Source
The RF Generator function uses the following assemblies. Refer to the block
diagrams in
• A27 Reference and A29 CDMA Reference
• A24 Signal Generator Sy nthesizer
• A26 Output
• A5 Input
To isolate the RF Source:
• On the Test Set:
• Press PRESET.
• Press the SHIFT key , then press the TESTS key to access the CONFIGURE
screen.
• Set the RF Display field to Freq.
• Set the RF Offset field to Off.
Block Diagrams.
• Locate the ANLG SCRNS group of keys and press the RX TEST key (to go
to the analog RX TEST screen).
• Set RF Gen Freq to 600 MHz.
• Set Amplitude to 0 dBm.
• Set Output Port to Dupl.
• On the external RF modulation analyzer or spectrum analyzer:
• Set the tuning for a 600 MHz, 0 dBm input signal.
• Connect the analyzer’s input to the Test Set’s DUPLEX OUT connector.
• Set the Test Set’s RF Gen Freq to 600, 300, and 150 MHz. For each
frequency, the external RF analyzer should read as follows:
• Power should read approx imat e ly 0.001 W for each freq u ency.
• Frequency should read 600, 300, and 150 MHz respectively.
78 S:\agilent\8924e\ALR\book\chapters\trouble.fm
4 Repair
This chapter contains information needed to remove and rep lace asse mblies in
the Test Set. Some assemblies require calibration data to be downloaded when
replaced (see "Downloading Calibrat ion Data" on page 81).
79
Repair
Before You Start
Before You Start
CAUTION Perform the following procedures only at a static-safe work station. The
printed circuit assemblies in this instrument are sensitive to STATIC
ELECTRICITY DAMAGE. Wear an anti-static wrist strap that is connected to
earth ground.
Recommended Torque
• Screws: Tighten until just snug. Do not to strip threads.
• RF connectors
SMA: 9.0 lb-in. (102 N-cm)
SMC: 6.0 lb-in. (68 N-cm)
Tools
One or more of the following tools may be required to access and remove Test
Set’s assemblies.
TX-10 Torx screwdriver
• TX-15 To rx screwdriver
• Flat-blade screwdriver
• 7-mm socket wrench
• 1/16-inch allen wrench
• 3/16-inch socket wrench
• 1/4 -inch open-end wrench
• 5/16-inch open-end wrench
Ordering Replacement Parts
Lists of replaceable parts and part ord ering information are provi ded in
See chapter 14"8924C Replaceable Parts" or see chapter 15, "8924E Replaceable
-
.
Parts"
80 S:\agilent\8924e\ALR\book\chapters\repair.fm
Repair
Downloading Calibration Data
Downloading Calibration Data
Most assemblies in the Test Set require calibration data. T o ensure t hat
the Test Set remains calibrated after an assembly is replaced, new
calibration data must be downloaded. When required , calibration data
is provided on a PCMCIA memory card that is included with the
replacement assembly. Refer to
which modules require calibration data.
Calibration Data Download Procedure
1. Switch the Test Set’s power off.
2. Remove the faulty assembly.
3. Install the replacement assemb ly.
4. Switch the Test Set’s power on.
5. Insert the memory card.
6. Press the TESTS key.
table 3, "Troubleshooting" on page 49 to see
7. Set the Select Procedure Location: field to Card.
8. Press the K1 key to run the test.
9. Follow the instructions on the screen.
10.Set the Select Procedure Filename: field to: DNLDCAL.
Chapter 4 81
Repair
Locating Assemblies
Locating Assemblies
Figure 4-1 Locating Assemblies
A2 A10 (Future Option)
A9
A8
A7
A6
A17
A14
A12
A15
A16
A11
A13
(Future
Option)
A22
A34
A35
A36
A37
A33
A3
A4
A5
A20
A19
A40
A21
A23
A39
82 S:\agilent\8924e\ALR\book\chapters\repair.fm
A38
A32
A31
A30
A29
A28
A27
A26
A25
A24
MP 52 (Qty 4)
Disassembly and Replacement Procedures
Removing the External Covers
MP 15 (Qty 14)
(9 in.lbs)
MP 53 (Qty 2)
MP 16 (Qty 4)
(21 in.lbs)
MP 49 (Qty 2)
Repair
Locating Assemblies
MP 51
6d50.gif
MP 47 (Qty 2)
Chapter 4 83
MP 38 (Qty 8)
(21 in.lbs)
6d40.gif
Repair
Locating Assemblies
Figure 4-2 Removing the Instrument Cover
MP 46
MP 44
6d30.gif
84 S:\agilent\8924e\ALR\book\chapters\repair.fm
Repair
Locating Assemblies
Removing the Front Panel Assembly: A1, A2, A3, A4, and A5
The front panel assembly consists of the Keyboard (A1), Keyboard
Filters (A2), CR T (A 3 ) Att e n u at o r (A 4) , a n d th e In pu t assembly (A5).
The entire front-panel assembly must be removed before any of the
sub-assemblies ca n be re moved.
The general procedure is:
1. Remove the Power Supply Cover.
2. Disconnect cable W10 from the Output assembly (A26).
3. Disconnect W3 on the Receiver 1st Mixer (A19).
4. Disconnect W7 from the Front Panel Assembly (A41).
5. Remove the four screws attaching the front frame to the chassis, and
move the frame slightly forw ard (to provide room to access
Motherboard cables).
6. Disconnect W1, W5, W6, MP20, MP21, and MP22 from the
Motherboard (A40).
7. Carefully slide the front frame assembly forward until the keyboard
cable (W26) can be disconnected fro m the c h assis bulkhead
connector.
Chapter 4 85
Repair
Locating Assemblies
Figure 4-3 Removing the Power Supply Cover
MP 26
MP 38 (Qty 11)
(21 in.lbs)
6d10-1.gif
86 S:\agilent\8924e\ALR\book\chapters\repair.fm
Cable Connections to A19
TO REMOVE FRONT PANEL
DISCONNECT W3, W 7 AND W10.
Locating Assemblies
(9 in.lbs)
W 10
LOOSEN SCREWS
ON OUTSIDE
TO REMOVE MIXER.
Repair
NEW A19
TO REMOVE A19 DISCONNECT
W 10, W 3, W 21 AND W22.
BACK OUT SCREW S
REMOVE
AND
DISCARD
7d10a.gif
W 7
A19
W 3
W 21
7e20a.gif
W 22
DRESS MIXER WIRE AS
SHOWN, SLIDE MIXER
INTO KEYWAY. USING
SCREWS THAT WERE
PREVIOUSLY LOOSENED
SECURE MIXER (9 in.lbs)
W 21
W 22
7d20c.gif
Chapter 4 87
Repair
Locating Assemblies
Figure 4-4 Front Panel Assembly Connections
MP 30 (Qty 4)
(21 in.lbs)
A 41
J 1
MP 9
MP 10
DISCONNECT MP20-22, W1, W5, AND W6 FROM MOTHERBOARD (W60).
W 27
W 28
W 29
W 1
7d80.gif
W 5
W 6
7d40.gif
88 S:\agilent\8924e\ALR\book\chapters\repair.fm
Figure 4-5 Keyboard
DISCONNECT KEYBOARD HARNESS
Repair
Locating Assemblies
KEYBOARD
HARNESS
7d30.gif
Chapter 4 89
Repair
Locating Assemblies
Replacing Keyboard Filter Assembly (A2)
Figure 4-6 Keyboard Cable Connections
MP 38 (Qty 25)
(21 in.lbs)
MP 54
MP 45
A 2
6c60.gif
90 S:\agilent\8924e\ALR\book\chapters\repair.fm
Figure 4-7 Keyboard Filter Replacement (A2)
Repair
Locating Assemblies
W 20
7c50.gif
7c40.gif
A2
MP 48
(Qty 2)
MP 43
(Qty 2)
(9 in.lbs)
Chapter 4 91
Repair
Locating Assemblies
Front Panel Disassembly
Figure 4-8 Disconnecting A4 and A5 From the Front Frame
MP 35 (Qty 2)
(21 in.lbs)
DICONNECT
(6 in.lbs)
A 4
5d30.gif
MP 35(Qty 2)
(21 in.lbs)
DISCONNECT
MP 39
(21 in.lbs)
W 23
(6 in.lbs)
DISCONNECT
DISCONNECT
W 3
5d20.gif
92 S:\agilent\8924e\ALR\book\chapters\repair.fm
Figure 4-9 Removing A5
WHEN INSTALLING NEW A5 INTO FRONT PANEL, TORQUE LOCKING NUTS (MP 1 0) BEFORE INSTAL LING SCREWS MP35 AND MP39.
A 5
Repair
Locating Assemblies
MP 10 (Qty 2)
(21 in.lbs)
5d50.gif
A 5
W 5
5d50.gif
Chapter 4 93
Repair
Locating Assemblies
Figure 4-10 Cable Routing to the Front Frame
(9 in.lbs)
A5W1
W 1
MP 20
MP 22
MP 21
Figure 4-11 Removing the Display Bezel
M P 41
SWING OUT
PRY UP
MP 41
PULL OUT
A5W1
CABLE CLAMPS
5d40.gif
5d10.gif
94 S:\agilent\8924e\ALR\book\chapters\repair.fm
Figure 4-12 R emoving the Display from the Front Panel
MP 40
MP 41
MP 35
(Qty 4)
(21 in.lbs)
Repair
Locating Assemblies
MP 7
5c90.gif
MP 23(Qty 9)
(9 in.lbs)
MP 6
Chapter 4 95
Repair
Locating Assemblies
Figure 4-13 Removing the Display Assembly from the Bracket
MP 38 (Qty 4)
(21 in.lbs)
5c40.gif
MP 5
A 3
5c30.gif
96 S:\agilent\8924e\ALR\book\chapters\repair.fm
Figure 4-14 Removing the CRT Assembly (A3) from its Shield
MP 36
Repair
Locating Assemblies
5c20.gif
MP 37
W 6
5c10.gif
Chapter 4 97
Repair
Locating Assemblies
Figure 4-15 Identifying Replaceable Front Panel Parts
MP 12
MP 13
MP 2
3d40.gif
MP 8
3d20.gif
W27
W28
MP 17 (Qty 2)
MP 19
(Qty 3)
(21 in.lbs)
W29
MP 1
3d15.gif
98 S:\agilent\8924e\ALR\book\chapters\repair.fm
Figure 4-16 Front Panel Wiring
MP 16
(Qty 2)
(6 in.lbs)
W 1
3c10.gif
Repair
Locating Assemblies
MP 14 (Qty 2)
MP 4
MP 24 (Qty 6)
(9 in.lbs)
MP 15
(Qty 2)
(9 in.lbs)
3c80.gif
MP 11
MP 18 (Qty 2)
A 1
MP 3
3d25.gif
MP 24 (Qty 6)
(9 in.lbs)
3c90.gif
Chapter 4 99
Repair
Locating Assemblies
Figure 4-17 Removing the Power Supply
A 23
MP 15 (Qty 5)
(9 in.lbs)
7c70.gif
A 23
W 4
7c65.gif
100 S:\agilent\8924e\ALR\book\chapters\repair.fm
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