Agilent-technologies E4438C Manual do Utilizador Página 80
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Performance Tests
Burst Modulation On/Off Ratio
3-32
Burst Modulation On/Off Ratio
This automated test verifies the burst modulation on/off ratio. The signal generator is configured for an
external burst input. The spectrum analyzer measures the RF output power with and without the external
burst applied. The power difference is the on/off ratio.
Recommended Equipment
• Agilent 8563EC Option 001 spectrum analyzer
• Agilent 8491A/B Option 010 fixed attenuator (10 dB)
• Agilent 33120A function generator
Equipment Setup
Figure 3-29 Burst Modulation On/Off Ratio Setup
- Calibration Guide 1
- Contents 10
- 1 Getting Started 11
- Overview of Getting Started 12
- Confirming Equipment 13
- Software Configuration 17
- Starting the Software 32
- Identifying the DUT 33
- Exiting the Software 39
- Getting Started 40
- 2 Required Equipment 41
- Table 2-1 Required Equipment 43
- 3 Performance Tests 49
- Overview of Performance Tests 50
- Running Performance Tests 52
- Recommended Equipment 57
- Equipment Setup 57
- Equipment Setups 58
- Performance Tests 59
- FM Frequency Response 61
- AM Frequency Response 62
- Residual FM 66
- Figure 3-17 Residual FM 67
- Power Level Accuracy 69
- Timebase Aging Rate 72
- (Option 402 Only) 76
- Pulse Modulation On/Off Ratio 79
- Burst Modulation On/Off Ratio 80
- CDMA Adjacent Channel Power 81
- WCDMA Adjacent Channel Power 82
- (Option 400) 82
- Phase Noise and Residual FM 83
- Measuring Residual FM 86
- GSM Loopback BER Check 89
- (Option 300 Only) 89
- Performance Test Records 90
- 4 Adjustments 93
- Overview of Adjustments 94
- Adjustment Relationships 97
- Analog Bus ADC Calibration 100
- Pretune Calibration 101
- Internal Source Calibration 102
- Description 103
- Required Test Equipment 103
- Procedure 103
- Timebase DAC Calibration 106
- FM Path Offset Calibration 108
- FM Out-of-Band Calibration 113
- FM/PM Out-of-Band Calibration 114
- DCFM Calibration 116
- Burst Modulator Calibration 119
- Prelevel Calibration 120
- VBLO Mixer Bias Calibration 121
- ALC Calibration 124
- Adjustments 130
- Power Search Calibration 131
- AM Gain Calibration 132
- I/Q Impairment Calibration 134
- Index I-1 137
- I-2 Index 138
- Index I-3 139
- I-4 Index 140
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