HP 8648 A/B/C/D - Changpuak.ch

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Contents-6 5. Service Shipping Your Instrument Back to Hewlett-Packard . . . 5-l Recommended Test Equipment . . . . . . . . . . . . 5-2 Post-Repair . . . . . . . . . . . . . . . . . . . . . . 5-5 Safety Notes . . . . . . . . . . . . . . . . . . . . . 5-8 5a. Theory of Operation Introduction . . . . . . . . . . . . . . . . . . . . . 5a-1 Overview . . . . . . . . . . . . . . . . . . . . . 5a-3 Al Front Panel . . . . . . . . . . . . . . . . . . . 5a-3 A2 Power Supply . . . . . . . . . . . . . . . . . . 5a-5 A3 Motherboard . . . . . . . . . . . . . . . . . . 5a-5 A4 Reference . . . . . . . . . . . . . . . . . . . 5a-6 A5 Sig Gen Synth . . . . . . . . . . . . . . . . . . 5a-6 A6 Output (HP 8648A) . . . . . . . . . . . . . . . 5a-7 A6 Output (HP 8648B/C/D) . . . . . . . . . . . . . 5a-7 A7 Attenuator (HP 8648A) . . . . . . . . . . . . . 5a-7 A10 Frequency Extension (HP 8648B/C/D) . . . . . . 5a-8 Al 1 Attenuator (HP 8648B/C/D) . . . . . . . . . . . 5a-8 Al2 Reverse Power Protection (HP 8648B/C/D) . . . . 5a-8 Al3 Pulse Modulator (HP 8648B/C/D Option lE6) . . . 5a-9 Al4 Modulation Generator (Option lE2) . . . . . . . 5a-9 A30 Pager Encoder (HP 8648A Option 1EP) . . . . . 5a-9 5b. Troubleshooting Information Introduction . . . . . . . . . . . . . . . . . . . . . 5b-1 Troubleshooting Checklist . . . . . . . . . . . . . . . 5b-2 AC Mains (line) Fuse Removal . . . . . . . . . . . . . 5b-3 lb Remove the Fuse . . . . . . . . . . . . . . . . 5b-3 Modulation Test Points and Power Supply LEDs . . . . . 5b-4 Power Supply Distribution . . . . . . . . . . . . . . 5b-5 Block Diagrams . . . . . . . . . . . . . . . . . . . . 5b-7 5~. Service Error Messages 6. Replaceable Parts Introduction . . . . . . . . . . . . . . . . . . . . . 6-l Assembly Replacements . . . . . . . . . . . . . . . 6-l 7. Adjustments Test Equipment . . . . . . . . . . . . . . . . . . . . 7-l Equipment Setup for Automated Tests . . . . . . . . 7-l Test Point Extender . . . . . . . . . . . . . . . . . 7-2 Manual Adjustments . . . . . . . . . . . . . . . . . 7-3 Internal Reference Oscillator Adjustment . . . . . . . 7-4 Pager Encoder Timebase Frequency Adjustment . . . 7-6 Automated Adjustments . . . . . . . . . . . . . . . . 7-8 AM Level and Distortion . . . . . . . . . . . . . . 7-9 AM Level . . . . . . . . . . . . . . . . . . . . . 7-11 Detector Offset . . . . . . . . . . . . . . . . . . . 7-13 Output Level . . . . . . . . . . . . . . . . . . . . 7-14 AM Level: FE . . . . . . . . . . . . . . . . . . . 7-15 Predistortion and Detector Offset . . . . . . . . . . 7-17 Prelevel . . . . . . . . . . . . . . . . . . . . . . 7-18 Output Level: Frequency Extension Calibration . . . 7-19
AM Modulator . . . . . . . . . . . . . . . . . . . Time Base DAC . . . . . . . . . . . . . . . . . . . Motherboard Audio Path . . . . . . . . . . . . . . DCFM . . . . . . . . . . . . . . . . . . . . . . . Audio Generator . . . . . . . . . . . . . . . . . . HF Power Level Accuracy . . . . . . . . . . . . . . LF Output Level . . . . . . . . . . . . . . . . . . LF Power Level Accuracy . . . . . . . . . . . . . . FSK Deviation . . . . . . . . . . . . . . . . . . . Filter Path . . . . . . . . . . . . . . . . . . . . . Service Support Software . . . . . . . . . . . . . . . Required Test Equipment . . . . . . . . . . . . . . Installing the Software . . . . . . . . . . . . . . . Running the Service Support Software . . . . . . . . Starting the Software . . . . . . . . . . . . . . . Identifying the DUT . . . . . . . . . . . . . . . Selecting the Performance Test or Adjustments and the Test. . . . . . . . . . . . . . . . . . . . Defining the Location where the Test Results are Saved . . . . . . . . . . . . . . . . . . . . Running the Tests and Adjustments . . . . . . . . Reviewing the Test and Adjustment Results . . . . Printing the Test and Adjustment Results . . . . . . Exiting the Software . . . . . . . . . . . . . . . Support Software Administration . . . . . . . . . . Software Configuration . . . . . . . . . . . . . . The User Configuration . . . . . . . . . . . . . The Administration Configuration . . . . . . . . Adding Test Equipment . . . . . . . . . . . . . . Removing Test Equipment . . . . . . . . . . . . . Editing Test Equipment . . . . . . . . . . . . . . Adding Device Drivers . . . . . . . . . . . . . . Removing Device Drivers . . . . . . . . . . . . . Adding Test Drivers . . . . . . . . . . . . . . . . Removing Test Drivers . . . . . . . . . . . . . . Adding Datapacks . . . . . . . . . . . . . . . . Removing Datapacks . . . . . . . . . . . . . . . Motherboard Repair Utility . . . . . . . . . . . . . Reading Information from the A3 Motherboard . . . Storing Information in the A3 Motherboard . . . . 8. Performance Tests Calibration Cycle . . . . . . . . . . . . . . . . . . . Required Test Equipment . . . . . . . . . . . . . . . Performance Test Descriptions . . . . . . . . . . . . . FM Accuracy Performance Test . . . . . . . . . . . FM Accuracy Performance Test (Option lE2 Only) . . FM Distortion Performance Test . . . . . . . . . . . AM Accuracy Performance Test . . . . . . . . . . . AM Accuracy Performance Test (Option lE2 only) . . AM Distortion Performance Test . . . . . . . . . . . Phase Modulation Distortion Performance Test . . . . Residual FM Performance Test . . . . . . . . . . . . Harmonics Performance Test . . . . . . . . . . . . Spurious Performance Test . . . . . . . . . . . . . 7-20 7-22 7-23 7-25 7-26 7-27 7-30 7-31 7-33 7-34 7-35 7-35 7-36 7-42 7-42 7-43 7-44 7-46 7-47 7-47 7-49 7-49 7-50 7-50 7-50 7-50 7-51 7-54 7-55 7-56 7-59 7-60 7-62 7-63 7-65 7-66 7-68 7-70 8-l 8-2 8-5 8-6 8-8 8-10 8-12 8-13 8-14 8-15 8-17 8-19 8-20 Contents-7
Page 1 and 2: Operation and Service Guide HP 8648
Page 3 and 4: Certification Warranty Hewlett-Pack
Page 5 and 6: Instrument Support Center Hewlett-P
Page 7 and 8: General Safety Considerations Warni
Page 9 and 10: Contents 1. Operation Quick Overvie
Page 11 and 12: Message During Servicing . . . . .
Page 13: POWer Subsystem . . . . . . . . . .
Page 17 and 18: Figures 2-l. HP 8648 Status Registe
Page 19 and 20: 7-68. Using the Open Dialog Box to
Page 21 and 22: 8-29. AM Accuracy Performance Test
Page 23 and 24: Operation “Operation” contains
Page 25 and 26: The following table describes the p
Page 27 and 28: 7. Modulation Source Press CMOD ON/
Page 29 and 30: Operation Examples This section pro
Page 31 and 32: Turn on the RF Output 3. Press C-1
Page 33 and 34: Using the Increment 3. Enter a freq
Page 35 and 36: Saving Instrument In this ten step
Page 37 and 38: egseq9.dw la-l 0 Operation Examples
Page 39 and 40: I Deleting a Register In this examp
Page 41 and 42: Renumbering the In this example, yo
Page 43 and 44: Inserting a Register in In this exa
Page 45 and 46: Offsetting the RF Output from a Ref
Page 47 and 48: la-20 Operation Examples 6. Change
Page 49 and 50: la-22 Operation Examples Adjusting
Page 51 and 52: Setting the Modulated 2. Press the
Page 53 and 54: Setting Up Pager The following step
Page 55 and 56: Selecting the Data 3. Set DATA RATE
Page 57 and 58: Selecting the Pager Capcode (Addres
Page 59 and 60: Selecting the Roaming 11. Set ROAMI
Page 61 and 62: Frequency/Amplitude Frequency and A
Page 63 and 64: Function Function hmckeys.drw 1. FR
Page 65 and 66:
Function Setting Up the Pager Encod
Page 67 and 68:
Function Setting the Format The for
Page 69 and 70:
Function lb-10 Operation Reference
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Page 73 and 74:
Page 75 and 76:
Page 77 and 78:
Function I- / I I / 1’gMRl 0 non
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Function 1 b-22 Operation Reference
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Page 85 and 86:
Page 87 and 88:
Page 89 and 90:
Page 91 and 92:
Function mmiii\ FREQUENCY 1 b-32 Op
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Function PN15 Setting the Data Rate
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Pulse Modulation Pulse Modulation N
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Increment Set Increment Set 1 b-38
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1 b-40 Operation Reference 2. Backs
Page 101 and 102:
Instrument Preset lb-42 Operation R
Page 103 and 104:
Instrument Preset 1 b-44 Operation
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Memory Memory The memory keys allow
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Memory 3. Register Recall The recal
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Modulation Source Modulation Source
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Modulation Source Note 5. EXT AC EX
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RF output RF Output 1. RF ON/OFF Pr
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Rear Panel Operation Rear Panel 1.
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Remote Interface Remote Interface (
Page 119 and 120:
Memory Interface Memory Interface (
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Operation Messages Front Panel Oper
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011 017 Amplitude exceeds ATTN HOLD
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HP-IB - Command Errors -101 -102 -1
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HP-IB Execution Errors HP-IB Device
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HP-IB Programming Background This s
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Programming Examples Examples are p
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Programming Pager 188 I~IJTF’IJT
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Command Statement Description Query
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%ble 2-1. Programming Command State
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‘Ihble 2-1. Programming Command S
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Ftwer6e Pwmr UnspecMed Amplkde Ext.
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Example: Generate a Service Request
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Unspecified Power This instrument p
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Line 50 Clears all status registers
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ABORt Subsystem ABORt (Option 1EP O
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Note FM Subsystem To set or change
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PAGing Subsystem [SOURceI (Option 1
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The contents of data to be filled i
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Note The data to be sent by the :DE
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[SOURce] : PAGing C : FORMatI :{FLE
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[SOURceI : PAGing C : FORMat] :
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[SOURceI :PAGing [:FORMat] :(FLEXIF
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PM Subsystem [SOURceI :PM [:DEViati
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STATUS Subsystem STATUS :QUEStionab
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Changing Parameters While Encoding
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HP-IB Capabilities The instrument i
Page 173 and 174:
HP 8656157 Compatible Language The
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9-0~till Code* RC RL RP RO Rl R2 R3
Page 177 and 178:
Installation Unpacking Your 1. Unpa
Page 179 and 180:
Replacing the Fuse If a fuse failur
Page 181 and 182:
Turning On the Signal Generator Con
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Specifications Options This chapter
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output 10 MHZ, typically > 0.5 Vm l
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Nonharmonics (2 5 kHz offset, < + 4
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Resolution < 2001 MHz 2 2001 MHz De
Page 191 and 192:
Environmental Operating temperature
Page 193 and 194:
output Front Panel BNC Nominally 1
Page 195 and 196:
Regulatory Information IS0 9002 Com
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Service Ship]ping Your This chapter
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Instrument rrequency Counter +equen
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Post-Repair ‘able 5-2. Adjustment
Page 203 and 204:
‘Ihble 5-3. Adjustments and Perfo
Page 205 and 206:
Theory of Operation Introduction Us
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Overview The HP 8648A/B/C/D signal
Page 209 and 210:
A2 Power Supply The power supply is
Page 211 and 212:
A6 Output (HP 8648A) The output ass
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A 13 Pulse Modulator (HP 8648B/C/D
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Troubleshooting Checklist 0 Li Ll D
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Modulation Test Points and Power Su
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jA30 PAGER ENCODER (OPT 1EP) ! ,~,
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502 Service Error Messages 506 Desc
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5c-4 Service Error Messages 512 Des
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Page 230 and 231:
Page 232 and 233:
Replaceable Parts Introduction Asse
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Al AlAl AlA AlA AlA AlJl AlMPl 41MP
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w14 WI5 W16 w17 Wl8 Item able 6-1.
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I ,I/.” All MI-LO LIP12 I MP25 Fi
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A10 All Al2 Al3 Al4 Bl Fl MPl MP2 M
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Adjustments This chapter documents
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2 Crimp , Connector ( 6 ) &Pin Conn
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Internal Reference Oscillator Adjus
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Pager Encoder Timebase Frequency Ad
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AM Level and Distortion HP 86488 On
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AM Level HP 8648B/C/D Only Descript
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Detector Offset HP 8648A Only Descr
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AM Level: FE HP 8648B/C/D Only (Not
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Predistortion and Detector Offset H
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Output Level: Frequency Extension C
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A3 Motherboard Figure 7-21. Locatio
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Motherboard Audio Path All HP 8648A
Page 266 and 267:
DCFM All HP 8648A/B/C/D Description
Page 268 and 269:
HF Power Level Accuracy All HP 8648
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1 \ # I J @g@ ggjJ;o P~EEB~B~QH 6dB
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LF Power Level Accuracy All HP 8648
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FSK Deviation Option 1EP Only FSK D
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Service Support Software The Servic
Page 278 and 279:
4. Continue with the setup by selec
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Note 8. Continue with the setup by
Page 282 and 283:
emember, you must restart MS Window
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2. Once the User Information dialog
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d. Select the Add button to add the
Page 288 and 289:
Running the Tests and Adjustments ,
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Printing the Test and Adjustment Re
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. In the Password field (item 2), t
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in measurements using the power sen
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Editing Test Equipment Editing of t
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j&tapsckt... Test Equipment... Prin
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Removing Device Drivers Removal of
Page 302 and 303:
Figure 7-63. Adding a Test Driver U
Page 304 and 305:
Adding Datapacks The addition of da
Page 306 and 307:
Removing Datapacks Removal of datap
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HP-IB Address In the HP8648 Motherb
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FhRud hth Ih* PDllam 0°C 1 you ham
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Caution “lea tdaMtion , RoEoed -
Page 314 and 315:
Performance lksts Calibration Cycle
Page 316 and 317:
HP 438 Power Meter Instrumentation
Page 318 and 319:
Performance Tkst Descriptions The p
Page 320 and 321:
Connect the Test Equipment Note Con
Page 322 and 323:
HP 8648B/C/D Option lE2 Only Connec
Page 324 and 325:
‘l&t Record HP 8648BKYD Only Conn
Page 326 and 327:
AM Accuracy Performance Tkst (Optio
Page 328 and 329:
Phase Modulation Distortion Perform
Page 330 and 331:
Residual FM Performance Test Connec
Page 332 and 333:
Harmonics Performance Tkst Connect
Page 334 and 335:
DC FM Frequency Error Performance T
Page 336 and 337:
Configure the HP 8648 1. Turn the R
Page 338 and 339:
‘I&ble 8-1. High Power Level Accu
Page 340 and 341:
Pulse Modulation Rise Time Performa
Page 342 and 343:
Pager Encoder Timebase Accuracy Per
Page 344 and 345:
Note FSK Deviation Accuracy Perform
Page 346 and 347:
Symbol 0 0 0=0-Q Marker Desired Dev
Page 348 and 349:
Internal Timebase: Aging Rate Perfo
Page 350 and 351:
Measure the Phase Change Time Note
Page 352 and 353:
Power Level Accuracy Performance Te
Page 354 and 355:
HP 8648A ‘l&t Record ‘lhble 8-3
Page 356 and 357:
‘able 8-5. FM Accuracy Performanc
Page 358 and 359:
‘Ihble 8-7. FM Distortion Perform
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Amplitude (am) -6 HP 8648A Test Rec
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EIP 8648A Test Record Table 8-9. AM
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RF Frequency HP 8648A (MW 10 100 24
Page 366 and 367:
Amplitude WW 4 -6 ‘able 8-14. Spu
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HP 8648A Test Record Note If the au
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EIP 8648A Test Record ‘able 8-16.
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Frequency NW 999.9 HP 8648A Test Re
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HP 8648B ‘I&t Record ‘able 8-20
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RF Frequency HP 8648B WW 1500 1500
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HP 8648B Test Record ‘Ihble 8-26.
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HP 8648B Test Record ‘I’kble 8-
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BP 8648B Test Record ‘Ihble 8-29.
Page 384 and 385:
IIP 8648B Test Record ‘Ihble 8-31
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‘Ihble 8-35. Spurious Performance
Page 388 and 389:
EIP 8648B Test Record Note If the a
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Frequency WW 400 HP 8648B Test Reco
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HP 8648B Test Record ‘able 8-37.
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HP 8648B Test Record If the automat
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HP 8648B Test Record ‘Ihble S-43.
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HP 8648C Test Record I%ble 8-46. HP
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HP 8648C Test Record 8-88 Performan
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FIP 8648C Test Record E-90 Performa
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HP 8648C Test Record 8-l 00 Perform
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HP 8648C Test Record E-102 Performa
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HP 8648C Test Record E-104 Performa
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BP 8648C Test Record Note If the au
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IIP 8648C Test Record E-108 Perform
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ElP 8648D Test Record ‘Ihble 8-71
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HP 8648D Test Record I I I I 1500 1
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HP 8648D Test Record RF Frequency H
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HP 8648D Test Record 8-l 16 Perform
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EIP 8648D Test Record 8-l 18 Perfor
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HP 8648D Test Record 8.120 Performa
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EIP 8648D Test Record 8-l 24 Perfor
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HP 8648D Test Record 8-128 Performa
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HP 8648D Test Record 8.130 Performa
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Supplemental Verification Tksts The
Page 446 and 447:
CW Frequency Accuracy Supplemental
Page 448 and 449:
Page 450 and 451:
Page 452 and 453:
Test Record 9 kHz RF’ Level Accur
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Index A Al theory of operation, 5a-
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computer requirements, 7-35 configu
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INT 1 kHz, lb-51 INT 400 Hz, lb-51
Page 460 and 461:
HP 8648B/C/D, 5-5 power, 3-2 cable,
Page 462 and 463:
T service information, 5-l support
Page 464:
U uninstalling the software, 7-41 u
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HP 8648 A/B/C/D - Changpuak.ch

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