To Perform The Bnc Test - HP 1660E Series Service Manual

Troubleshooting
To perform the
BNC
test
6 Select Stop, and turn off the logic analyzer. Remove the power cable.
The test
will
not immediately stop when Stop is selected; it
will
continue until the current
iteration of the disk test is completed and then stop.
7 Disconnect the disk drive cables. Re-install the hard disk drive onto the disk drive
assembly, and then re-install the disk drive assembly in the logic analyzer.
S Reconnect the disk drive cables and install the cover on the logic analyzer.
9 Connect the hard disk drive cable to the data pins. Do not connect the cable to the
address pins.
To perform the BNC test
Equipment Required
Equipment
Digitizing Oscilloscope
BNC Shorting Cap
BNC Cable
BNC-Banana Adapter
Critical Specification
100 MHz Bandwidth
Recommended
Model/part
HP 54600B
1250-0774
HP8120-1B40
1251-2277
1 Press the Config key.
2 Assign pods I and 2 to Machine
1.
To assign the pod field, select the pods 1 and 2 field, then select Machine 1 in the pop-up
menu.
3 In the Analyzer I box, select the Type field. Select Timing in the pop-up menu.
4 Set up the trigger menu.
a Press the Trig key. Select Clear Trigger All.
b Select Arming Control.
In
the Arming Control pop-up menu, select the field labeled
Run, then select Port
In.
Press the Done key.
5 Attach a BNC shorting cap to the External Trigger Input on the rear panel of the
logic analyzer.
6 Using a BNC cable, connect the External Trigger Output to the oscilloscope
channell input. Set the oscilloscope to Trigger On and measure TIL voltage levels.
7 Press the RUN front panel key.
The warning "MACHINE 1 Waiting on level 1"
will
appear.
S Remove the shorting cap from the rear panel External Trigger input BNC.
9 The warning will go away and the oscilloscope will display a positive-going TIL
pulse.
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