Specifications

1-57
Troubleshooting
Troubleshooting Assembly–Level Problems
1301 Internal Pulse Generator Clock
1. Using an oscilloscope, measure P131–91 for a 10 MHz signal at 3.5 V
pp
.
• If the signal is good, replace the A11 Pulse/Analog Modulation Generator.
2. If the signal is bad, check P41–7.
• If the signal is good on P41–7, replace the A31 Motherboard.
• If the signal is bad on P41–7, replace the A7 Reference.
1302 Output
• Replace A11 Pulse/Analog Modulation Generator.
1303 Voltage Ref DAC
• Replace A11 Pulse/Analog Modulation Generator.
1304 20 GHz Pulse
• Replace A11 Pulse/Analog Modulation Generator.
1305 Not Used
1306 Standard 3 GHz Pulse
• Replace A11 Pulse/Analog Modulation Generator.
1307 High Performance 3 GHz Pulse
• Replace A11 Pulse/Analog Modulation Generator.
1308 Numeric Synthesizer
• Replace A11 Pulse/Analog Modulation Generator.
1309 Function Generator Channel 1
• Replace A11 Pulse/Analog Modulation Generator.
1310 Function Generator Channel 2
• Replace A11 Pulse/Analog Modulation Generator.
1311 Frequency Modulator
• Replace A11 Pulse/Analog Modulation Generator.
1312 Low Frequency Out
• Replace A11 Pulse/Analog Modulation Generator.