Agilent Technologies 8133A Instrukcja Obsługi Strona 171
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Theory of Operation 8
16800 Series Portable Logic Analyzers Service Guide 171
Power supply
The frame uses two modular power supplies to provide the six
DC voltage rails: - 12 V, +12 V, - 5 V, +5 V, - 3.3 V, +3.3 V. These rails
use remote sensing to maintain .01% load regulation. The
module slots are limited to 100 W each and the instrument as a
whole to 600 W.
The frame has a "soft" power on/off algorithm. Pressing the
power switch notifies the CPU to either wake up or power
down. The CPU then in turn drives the signal line which
actually turns the supplies on or off. A PLD monitors this
process and will force a power down after approximately two
minutes if the CPU does not respond. The small portion of
circuitry involved in this process is powered from an auxiliary
+5 V which is always present as long as the instrument is
plugged in. Additional logic monitors the voltage levels on the
six rails and will also cause an immediate power down if any
one drops below about 90% of regulation. Power down can also
be caused by an over temperature sense circuit. In this case, the
PLD notifies the CPU, the user receives a warning window, and
a soft power down is started. Again, the PLD will force a power
down if the CPU does not soft power down in about two
minutes.
PCI board
The PCI Board plugs into a CPU motherboard PCI slot,
providing the interface between the CPU motherboard and the
logic analyzer. On the PCI board is a PCI bridge chip used to
provide an electrical interface between the CPU PCI slot bus
and the two PCI devices located on the Module Interface Board.
A TI2050A PCI bridge chip is used to connect to the primary
PCI bus on the CPU motherboard connector and provides a
secondary PCI bus, which is connected via an 80- pin
high- density cable from this PCI board to the Module Interface
Board.
MIB (Module Interface Board)
Top level function
The MIB contains all of the logic analyzer frame specific
hardware. This includes all circuits necessary to interface with
measurement modules, interface with the front panel knob and
keys, monitor frame functions, and interface to the CPU
motherboard via the PCI board. It also performs power
distribution and numerous interconnects.
- Agilent 16800 Series 1
- Portable Logic Analyzers 1
- Model Comparison 3
- Features, Logic Acquisition 3
- Features, Mainframe 4
- Features, Pattern Generator 4
- Supplied Accessories 4
- Optional Accessories: 4
- Service Strategy 4
- In this Service Guide 6
- 4 Calibrating and Adjusting 8
- 7 Replaceable Parts 10
- 8 Theory of Operation 10
- Contents 11
- General Information 13
- Accessories 14
- Specifications 15
- Characteristics 16
- Non-Operating Environment 17
- Dimensions 18
- Recommended Test Equipment 19
- 1 General Information 20
- Preparing for Use 21
- To inspect the logic analyzer 22
- To apply power 22
- To clean the instrument 23
- To start the user interface 23
- To test the logic analyzer 23
- 2 Preparing for Use 24
- Testing Performance 25
- To perform the power-up tests 26
- Logic Analyzer Test Strategy 27
- 3 Testing Performance 28
- Testing Performance 3 31
- Equipment Required 34
- Perform System Self-Tests 36
- Set Up the Test Equipment 37
- Connect the Test Equipment 39
- Deskew the oscilloscope 42
- Set the 8133A pulse width 43
- Configure the Logic Analyzer 45
- Run eye finder 49
- To re-align a stray channel 50
- Test Pod 1 in 250 Mb/s Mode 52
- Test Pod 2 in 250 Mb/s Mode 57
- Test the remaining pods 59
- Test Pod 1 in 500 Mb/s Mode 60
- Test Pod 2 in 500 Mb/s Mode 64
- Conclude the State Mode Tests 66
- Performance Test Record 68
- Calibrating and Adjusting 69
- Calibration Strategy 70
- Troubleshooting 71
- Try , and then 75
- Power Supplies 84
- To run the self-tests 88
- Bit#: 39 - 16 15 - 8 7 - 0 92
- Clock Test 93
- Simple RAM Test 93
- RAM Persistence Test 94
- Marching Bits RAM Test 94
- Wait Test 94
- Instruction Interrupt Test 95
- To exit the test system 96
- 5 Troubleshooting 100
- Set up the test equipment 101
- Connect the test equipment 101
- Threshold 102
- Troubleshooting 5 109
- Clock Frequency of 100 MHz 111
- Click Run Rep 111
- Replacing Assemblies 113
- Replacement Strategy 114
- Tools Required 114
- To save the license file 115
- To power off the system 116
- Replacing Assemblies 6 117
- 6 Replacing Assemblies 118
- 600 watt power supply 119
- Secondary power supply 120
- 60 mm fan 144
- 92 mm fans 145
- Returning Assemblies 148
- FRAGILE 149
- Replaceable Parts 151
- Ordering Replaceable Parts 152
- System Replaceable Parts List 155
- Replaceable Parts 7 159
- • A — Assembly 163
- • MP — Mechanical Part 163
- • W — Cable 163
- Theory of Operation 167
- System Block Level Theory 168
- Module Interface Board (MIB) 169
- CPU Subsystem 170
- PCI board 171
- MIB (Module Interface Board) 171
- Module Bus FPGA(s) 172
- I/O FPGA 172
- Theory of Operation 8 173
- Front Panel Assembly 174
- Power Up Routine 175
- Product install 178
- Software recovery methods 178
- Self Test 179
- Comparators 181
- Acquisition IC 181
- Master/Expander Connectors 182
- Instruction Memory 183
- Data Memory 183
- Output Driver 184
- Clock Circuit 184
- CPU Interface 184
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