Agilent Technologies HP8648A Manuale Utente Pagina 115
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FM Receivers
114
On the Signal Generator:
17 Set RF Power to ON.
18 Set Output Level to 31.6 mV.
19 Set Output Frequency to lowest frequency being checked (typically
<1 MHz).
20 Set Modulation to internal FM.
21 Set Modulation rate to 400 Hz.
22 Set Modulation Deviation to 3 kHz.
23 Tune the Signal Generator in 1 kHz steps from the minimum to maximum
frequency and note frequencies where SINAD decreases below 12 dB.
❒ If necessary, increase tuning resolution on the Signal Generator and ad-
just as required to locate frequency causing maximum degradation of
the SINAD reading.
24 For each frequency where SINAD is degraded, reduce the Signal Generator
RF output level until SINAD of 12 dB is obtained.
• Record the Signal Generator frequency and level.
25 Repeat step 23and step 24 until all spurious responses are measured.
Calculate the Spurious Response:
26 The minimum result is the calculated spurious response attenuation.
calculated spurious response attenuation
Each Spurious response level recorded in step 25
Amplitude level recorded step 17
- RF Communications Test Set 2
- Application Handbook 2
- Manufacturer’s 4
- Declaration 4
- Herstellerbeschei 4
- Considerations 5
- LIMITATION OF 8
- WARRANTY 8
- EXCLUSIVE 8
- REMEDIES 8
- DECLARATION OF CONFORMITY 9
- Contents 12
- Product Description 26
- Features 27
- Specifications 28
- The Test Set’s Features 29
- DATA FUNCTIONS 33
- CURSOR CONTROL 33
- SQUELCH Control 35
- SSB signals 35
- SCREEN CONTROL 36
- INSTRUMENT STATE 36
- DATA FUNCTIONSUSER DATA 36
- USER DATA 38
- PUSH TO SELECT 40
- Measurements Considerations 44
- Measurement Guideline 1 45
- Measurement Guideline 2 46
- Measurement Guideline 3 47
- Measuring Audio Output Power 48
- Coded Squelch 48
- Measurement Guideline 4 49
- Testing FM Radios 50
- FM Transmitters 53
- 145.280024 59
- 2.03 1.00004 59
- 144.680040 61
- 0.591 1.00007 61
- 145.890058 67
- 0.587 0.10354 67
- Decoder Option 69
- ANSI/EIA-RS-152-C, RS-316-B 75
- 145.279974 76
- 2.05 3.4 76
- FM Receivers 80
- Reference is RS-204D 84
- Test Load 103
- ANSI/EIA/TIA-204D 106
- Testing AM Radios 116
- Introduction 117
- List of Tests 118
- AM Transmitters 119
- SPECTRUM ANALYZER 120
- 28.310075 125
- 18.9 0.99951 125
- 0.169 3.579 125
- 28.310176 128
- 18.3 0.99852 128
- 18.3 12.8 130
- 1000 MHz 131
- 27.064762 135
- 4.58 1.00001 135
- AM Receivers 137
- Set screen 138
- 0.004040 143
- Testing SSB Radios 160
- SSB Transmitters 163
- -0.119 3.579 166
- 28.310885 166
- 19.5 0.16522 166
- SSB Receivers 174
- List of Measurements 190
- Using the Spectrum Analyzer 191
- TRANSMITTER UNDER TEST 192
- ANTENNA 192
- (RF OUTPUT) 192
- Description 197
- Tracking Generator option 201
- Using the Tracking Generator 206
- DEVICE UNDER TEST 207
- AUDIO IN 217
- DUPLEX OUTRF IN/OUT 217
- On the Test Set: 220
- 11636A), and a 50Ω Load 220
- ANT INDUPLEX OUTRF IN/OUT 225
- AUDIO OUTSQUELCHVOLUMEMIC/ACC 227
- DUPLEX TEST 229
- Oscilloscope Measurements 234
- Using the Oscilloscope 236
- Oscilloscope Overview 237
- Configuring for Measurements 244
- References 250
- Manuals 251
- Application Note 252
- Specifications and Standards 253
- HP 8920A Specifications 254
- RF Frequency 256
- Spectral Purity 258
- TDMA Signal Generator 261
- Audio Source Specifications 262
- RF Analyzer Specifications 263
- RF Frequency Measurement 264
- FM Measurement 265
- AM Measurement 266
- SSB Measurement 267
- TDMA Analyzer 268
- AF Analyzer Specifications 269
- Distortion Measurement 270
- SINAD Measurement 270
- Audio Filters 271
- Oscilloscope Specifications 272
- Frequency 273
- Tracking Generator 274
- Adjacent Channel Power 275
- Resolution 275
- Signaling (Option 004) 277
- DC Current Meter (Option 103) 278
- 100 mA) 278
- TCXO (Standard) 280
- (Option 001) 280
- Save/Recall Registers 281
- General Specifications 282
- HP 8920B Specifications 284
- “nominal” 285
- −116 dBc/Hz 288
- DC Current Meter 306
- Remote Programming 307
- Memory Card Specifications 308
- Glossary 312
- Frequency Measurement 320
- , 87, 140 320
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