Chapter 10
525
Synthesizer Section
Unlocked Reference PLL (100 MHz VCXO)
8. If the 100 MHz oscillator is working, the reason for the unlocked
condition is either a problem in the 10 MHz reference or a fault in
the signal path around the loop.
Check 10 MHz
reference to
phase/frequency
detector (steps
9-14)
9. On the spectrum analyzer, press
AUX CTRL
,
REAR PANEL
, and
10
MHz INT
.
10.Check the 10 MHz reference frequency accuracy by connecting a
frequency counter to A15J301 and verify that the reference
frequency is 10 MHz
±
40 Hz after a 5 minute warm-up period.
11.If a 10 MHz signal >1 V peak-to-peak is not present at A15J301,
refer to the "10 MHz Reference" in Chapter 11.
12.Measure the signal at TP301 with an oscilloscope. Refer to function
block M of A15 RF schematic.
13.Measure the signal at U502 pin 11 with an oscilloscope. Refer to
function block X of A15 RF schematic. This signal should be TTL
levels at 10 MHz with a 60 percent duty cycle.
14.If TTL-level signals (approximately 10 MHz) are not present, check
signals backwards through the loop to find a fault in the signal path.
15.Measure the signals at the following test points with an active
probe/spectrum analyzer combination:
16.If an approximately 10 MHz TTL signal is present at U502 pin 11
with 60 percent duty cycle, and the RF portion of the phase-lock loop
is functioning, the fault probably lies in the phase/frequency detector
or the 100 MHz lock loop integrator.
Check
phase/frequency
detector (steps
17-22)
17.Monitor U504 pin 5 and U503 pin 9 with an oscilloscope. These are
the two outputs of the phase/frequency detector. Refer to function
block O of A15 RF schematic.
18.A locked loop will exhibit stable, narrow (approximately 20 ns wide),
and positive-going TTL pulses occurring at a 10 MHz rate at U504
pin 5 and U503 pin 9.
19.If the loop is unlocked, but signals are present on both inputs of the
phase/frequency detector, the output pulses will be superimposed on
each other.
Junction of
100 MHz, +2.5 dBm
±
2 dB
C570 and C571
Junction of R715,
100 MHz,
−
3 dBm
±
2 dB
R716, R567, and R568
U700 pin 3
100 MHz, +16.5 dBm
±
2 dB
U700 pin 1
100 MHz, +8.5 dBm
±
2 dB
Содержание 8560E
Страница 17: ...16 Contents ...
Страница 24: ...23 1 General Information ...
Страница 49: ...48 Chapter1 General Information Sales and Service Offices ...
Страница 50: ...49 2 Adjustment Procedures ...
Страница 67: ...66 Chapter2 Adjustment Procedures 2 Display Adjustment 8560E only Figure 2 3 CRT Adjust Pattern ...
Страница 132: ...131 2a Adjustment Procedures HP 3335A Source not Available ...
Страница 145: ...144 Chapter2 Adjustment Procedures HP 3335A Source not Available 5a DC Log Amplifier Adjustments ...
Страница 146: ...145 3 Assembly Replacement ...
Страница 155: ...154 Chapter3 Assembly Replacement Procedure 2A A1 Front Frame A18 LCD 8560EC Figure 3 2 LCD Assembly Exploded View ...
Страница 178: ...Chapter 3 177 Assembly Replacement Procedure 5 A2 A3 A4 and A5 Assemblies Figure 3 14 HP IB and A1A1 W1 Cable Placement ...
Страница 180: ...Chapter 3 179 Assembly Replacement Procedure 6A A6 Power Supply Assembly 8560EC Figure 3 15 Power Supply Cover ...
Страница 191: ...190 Chapter3 Assembly Replacement Procedure 8 A7 through A13 Assemblies Figure 3 20 Assembly Locations ...
Страница 200: ...Chapter 3 199 Assembly Replacement Procedure 9 A14 and A15 Assemblies Figure 3 26 A14 and A15 Assembly Cables ...
Страница 203: ...202 Chapter3 Assembly Replacement Procedure 10 A16 FADC A17 CRT Driver 8560E Figure 3 28 A16 Cable Routing ...
Страница 210: ...Chapter 3 209 Assembly Replacement Procedure 13 Rear Frame Rear Dress Panel Figure 3 30 A6 Power Supply Cover ...
Страница 215: ...214 Chapter3 Assembly Replacement Procedure 14 W3 Line Switch Cable 8560E Figure 3 33 W3 Cable Connector ...
Страница 224: ...223 4 Replaceable Parts ...
Страница 251: ...250 Chapter4 Replaceable Parts Firmware Dependent Part Numbers ...
Страница 253: ...252 Chapter4 Replaceable Parts Firmware Dependent Part Numbers ...
Страница 255: ...254 Chapter4 Replaceable Parts Firmware Dependent Part Numbers ...
Страница 257: ...256 Chapter4 Replaceable Parts Firmware Dependent Part Numbers ...
Страница 259: ...258 Chapter4 Replaceable Parts Firmware Dependent Part Numbers ...
Страница 261: ...260 Chapter4 Replaceable Parts Firmware Dependent Part Numbers ...
Страница 263: ...262 Chapter4 Replaceable Parts Firmware Dependent Part Numbers ...
Страница 265: ...264 Chapter4 Replaceable Parts Firmware Dependent Part Numbers ...
Страница 267: ...266 Chapter4 Replaceable Parts Firmware Dependent Part Numbers ...
Страница 268: ...267 5 Major Assembly and Cable Locations ...
Страница 272: ...Chapter 5 271 Major Assembly and Cable Locations Introduction Figure 5 2 Top View A2 and A3 Unfolded EC Series ...
Страница 273: ...272 Chapter5 Major Assembly and Cable Locations Introduction Figure 5 3 Top View A2 A3 A4 and A5 Unfolded EC Series ...
Страница 274: ...Chapter 5 273 Major Assembly and Cable Locations Introduction Figure 5 4 Top View A2 Unfolded E Series ...
Страница 275: ...274 Chapter5 Major Assembly and Cable Locations Introduction Figure 5 5 Top View A2 and A3 Unfolded E Series ...
Страница 276: ...Chapter 5 275 Major Assembly and Cable Locations Introduction Figure 5 6 Top View A2 A3 A4 and A5 Unfolded E Series ...
Страница 277: ...276 Chapter5 Major Assembly and Cable Locations Introduction Figure 5 7 Bottom View A15 Unfolded ...
Страница 278: ...Chapter 5 277 Major Assembly and Cable Locations Introduction Figure 5 8 Bottom View A15 and A14 Unfolded ...
Страница 279: ...278 Chapter5 Major Assembly and Cable Locations Introduction Figure 5 9 Front End ...
Страница 281: ...280 Chapter5 Major Assembly and Cable Locations Introduction ...
Страница 282: ...281 6 General Troubleshooting ...
Страница 285: ...284 Chapter6 General Troubleshooting Introduction Figure 6 1 Assembly Test Points ...
Страница 286: ...Chapter 6 285 General Troubleshooting Introduction Figure 6 2 Ribbon Cable Connections 1 of 3 ...
Страница 287: ...286 Chapter6 General Troubleshooting Introduction Figure 6 3 Ribbon Cable Connections 2 of 3 ...
Страница 290: ...Chapter 6 289 General Troubleshooting Introduction Figure 6 5 Service Cal Data Menu ...
Страница 331: ...330 Chapter6 General Troubleshooting Block Diagram Description Figure 6 6 Functional Sections ...
Страница 342: ...Chapter 6 341 General Troubleshooting Block Diagram Description Figure 6 8 Simplified Block Diagram Replace with sj13c ...
Страница 343: ...342 Chapter6 General Troubleshooting Block Diagram Description ...
Страница 345: ...344 Chapter6 General Troubleshooting Block Diagram Description ...
Страница 347: ...346 Chapter6 General Troubleshooting Block Diagram Description ...
Страница 349: ...348 Chapter6 General Troubleshooting Block Diagram Description ...
Страница 351: ...350 Chapter6 General Troubleshooting Block Diagram Description ...
Страница 353: ...352 Chapter6 General Troubleshooting Block Diagram Description ...
Страница 354: ...353 7 ADC Interface Section ...
Страница 403: ...402 Chapter7 ADC Interface Section A16 Assembly Fast ADC Control Circuits 8560E with Option 007 ...
Страница 405: ...404 Chapter7 ADC Interface Section A16 Assembly Fast ADC Control Circuits 8560E with Option 007 ...
Страница 406: ...405 8 IF Section ...
Страница 436: ...Chapter 8 435 IF Section A5 IF Assembly Figure 8 3 IF Adjust Signature ...
Страница 437: ...436 Chapter8 IF Section A5 IF Assembly Figure 8 4 Detailed IF Adjust Signature 1 ...
Страница 438: ...Chapter 8 437 IF Section A5 IF Assembly Figure 8 5 Detailed IF Adjust Signature 2 ...
Страница 439: ...438 Chapter8 IF Section A5 IF Assembly Figure 8 6 Detailed IF Adjust Signature 3 ...
Страница 440: ...Chapter 8 439 IF Section A5 IF Assembly Figure 8 7 Detailed IF Adjust Signature 4 ...
Страница 441: ...440 Chapter8 IF Section A5 IF Assembly Figure 8 8 Detailed IF Adjust Signature 5 ...
Страница 443: ...442 Chapter8 IF Section A5 IF Assembly Figure 8 9 Noisy Signature ...
Страница 444: ...Chapter 8 443 IF Section A5 IF Assembly Figure 8 10 Noise with Correct Shape ...
Страница 445: ...444 Chapter8 IF Section A5 IF Assembly Figure 8 11 Region B Amplitude Variation ...
Страница 447: ...446 Chapter8 IF Section A5 IF Assembly Figure 8 13 Faulty Crystal Short ...
Страница 456: ...Chapter 8 455 IF Section Cal Oscillator Assembly P O A4 Figure 8 16 Output Waveform 10 kHz Resolution Bandwidth ...
Страница 457: ...456 Chapter8 IF Section Cal Oscillator Assembly P O A4 Figure 8 17 Output Waveform 3 kHz Resolution Bandwidth ...
Страница 458: ...Chapter 8 457 IF Section Cal Oscillator Assembly P O A4 Figure 8 18 Output Waveform 1 kHz Resolution Bandwidth ...
Страница 459: ...458 Chapter8 IF Section Cal Oscillator Assembly P O A4 Figure 8 19 Output Waveform 300 Hz Resolution Bandwidth ...
Страница 463: ...462 Chapter8 IF Section Cal Oscillator Assembly P O A4 ...
Страница 465: ...464 Chapter8 IF Section Cal Oscillator Assembly P O A4 ...
Страница 467: ...466 Chapter8 IF Section Cal Oscillator Assembly P O A4 ...
Страница 468: ...Chapter 8 467 IF Section Cal Oscillator Assembly P O A4 Figure 8 22 A5 IF Assembly Block Diagram Replace with sj124e ...
Страница 469: ...468 Chapter8 IF Section Cal Oscillator Assembly P O A4 ...
Страница 470: ...469 9 Controller Section ...
Страница 486: ...Chapter 9 485 Controller Section Display Problems 8560E Figure 9 10 Delta Y Waveform ...
Страница 502: ...Chapter 9 501 Controller Section Keyboard Problems Figure 9 12 A2 Controller Block Diagram E Series replace with sj125e ...
Страница 503: ...502 Chapter9 Controller Section Keyboard Problems ...
Страница 505: ...504 Chapter9 Controller Section Keyboard Problems ...
Страница 506: ...505 10 Synthesizer Section ...
Страница 576: ...Chapter 10 575 Synthesizer Section A21 OCXO Figure 10 14 Frequency Control Block Diagram Replace with sj19c ...
Страница 577: ...576 Chapter10 Synthesizer Section A21 OCXO ...
Страница 579: ...578 Chapter10 Synthesizer Section A21 OCXO ...
Страница 581: ...580 Chapter10 Synthesizer Section A21 OCXO ...
Страница 582: ...581 11 RF Section ...
Страница 598: ...Chapter 11 597 RF Section A14 Frequency Control Assembly Figure 11 2 A7 LODA Drive ...
Страница 617: ...616 Chapter11 RF Section A10 Tracking Generator Option 002 ...
Страница 618: ...617 12 Display Power Supply Section ...
Страница 626: ...Chapter 12 625 Display Power Supply Section CRT Display 8560E Figure 12 4 Power Supply and CRT Block Diagram ...
Страница 651: ...650 Chapter12 Display Power Supply Section A6 Power Supply Assembly ...
Страница 653: ...652 Chapter12 Display Power Supply Section A6 Power Supply Assembly ...
Страница 654: ...653 13 Component Level Information Packets ...
Страница 660: ...Chapter 13 659 Component Level Information Packets Introduction ...