Agilent Technologies HP8648A Manuale Utente Pagina 108
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FM Receivers
107
On the Test Set using the knob and data entry keys:
15 Set AFGen1 To 20% of the Receiver’s maximum frequency deviation
(1 kHz for Receivers with specified maximum frequency deviation of
5 kHz).
16 Select AC Level.
17 Press the REF SET key.
18 Change AFGen1 Freq from 300 Hz to 3 kHz while observing AC Level
Meter.
Frequency Response is displayed on the screen as AC Level in relative dB
(from 300Hz to 3 kHz) as shown.
NOTE: The audio response should not vary more than +2 to −8 dB (Receiver’s with
loudspeakers) or +1 to −3 dB (Receivers with headphones or feed-line) from
a standard 6 dB per octave de-emphasis curve over the frequency range of
300 to 3000 Hz.
Audio Fre-
quency
Response
To Screen
RX TEST
AC Level
Filter 1
<20Hz HPF
Filter 2
15kHz HPF
Atten Hold
On/Off
Ext Load R
8.00
Ω
RF GEN
RF ANL
AF ANL
SCOPE
SPEC ANL
ENCODER
DECODER
RADIO INT
More
dB
dB
-7.61
SINAD
RF Gen Freq
145.280000
MHz
Amplitude
-47.0
uV
Output Port
RF Out/Dupl
AFGen1 Freq
3.0000
kHz
AFGen2 Freq
1.0000
kHz
AFGen2 To
Off
FM
00.07 24
Ref
AFGen1 To
1.00
kHz
FM
- 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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