Agilent-technologies E4438C Manual do Utilizador Página 87
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Performance Tests
Dual Arbitrary Waveform Generator Check
3-39
Dual Arbitrary Waveform Generator Check
This check verifies the functionality of the dual arbitrary waveform generator. A triangular waveform is
downloaded into the signal generator and then output to the rear-panel I and Q outputs. An oscilloscope is
used to monitor the rear-panel I and Q outputs.
NOTE This is not a performance test. This check is only provided to ensure that the dual arbitrary
waveform generator is operational. The results are verified visually on the oscilloscope, and
there is no data that is automatically logged or that can be printed out.
Recommended Equipment
• An oscilloscope with 2 input channels (for example, an Agilent 54610B digital oscilloscope)
Equipment Setup
Figure 3-35 Dual Arbitrary Waveform Generator Check Setup
Procedure
1. Connect the test equipment as shown. The oscilloscope is not connected to GPIB; this allows for the use of
most general 2-channel oscilloscopes.
2. Set the oscilloscope to display both Channel 1 and Channel 2. Set the oscilloscope to trigger on Channel 1.
The recommended settings are:
• Vertical Scale: 500 mV/div
• Timebase: 5 microseconds/div
3. Verify that Channel 1 and Channel 2 are both displaying triangular waveforms approximately 180 degrees
- 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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