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CHAPTER 5
Troubleshooting and Alignment Procedures
Equipment Needed for Troubleshooting and Alignment:
•
42067 Extender Card (optional, but easier to align with)
•
AC Voltmeter
•
DC Ammeter
•
Alignment Tool
•
Signal Generator
Alignment of the system has been performed at the factory. Please try the
unit first before attempting the alignment procedures. No adjustment should
be necessary since levels are set at the factory per customer's specifications
at time of order.
Attachment A (shipped inside the chassis) lists all levels and impedances for
the system.
The 2-Wire line that will be used with the system should be
connected to the system during the alignment process.
When a signal generator is inserted into a signal path, that port may be
double terminated.
generator with a high impedance AC voltmeter. When the signal generator
is connected to the input port, set the level to that specified by Attachment
A as read on the AC voltmeter.
When taking output level readings, the AC voltmeter will be either
terminated or bridged. If it is unknown whether an output reading should be
a terminated or bridged measurement, compare the two readings. If a 3.5
dBm difference is noted, the bridged measurement is correct. If a 6 dBm
difference is noted, the terminated measurement is correct.
41675 Switched Network Interface Alignment Procedure
1.
Remove front panel.
2.
Turn power OFF (flip the toggle switch to the right).
3.
Remove 41675 Switched Network Interface module and insert the
42067 Extender Card in its place.
4.
Set Switch SW1 so that only Position 4 is closed for the time-out period
of 8 minutes.
TROUBLESHOOTING and ALIGNMENT
If the unit is not working, it may need to be aligned.
To insure correct test tone levels, bridge the signal
O
1
2
N
SW1
9
3
4
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