Tektronix TLA 720, Service Manual

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TLA 720 Benchtop Chassis and TLA 7XM Expansion Chassis Service Manual
1–1
Benchtop Chassis Specifications
This chapter provides a general description of the benchtop chassis. A selected
list of specification tables beginning on page 1–3 that will aid you in servicing.
Product Description
The benchtop chassis is designed to be used as part of the TLA 700 Series Logic
Analyzer family. The benchtop chassis is an intelligent 13-slot chassis, with
intelligent cooling for installed modules, and a high quality auto-configurable
backplane.
The power supply input line capacity is 1450 Watts, with 872 Watts usable by
the TLA 700 Series instrument modules at any given time.
The power supply plugs directly into the rear of the chassis and has no cables to
disconnect. Because of this design, you can replace the power supply in a short
amount of time. The power supply automatically accommodates for the
appropriate input voltage and frequency; therefore, their is no mechanical switch
required to select the correct line voltage and frequency.
The benchtop chassis accommodates both exclusively digital applications (using
the logic analyzer module), and exclusively analog applications (using the DSO
module), as well as combinations of both digital and analog.
The benchtop chassis provides optimal cooling for all installed modules. The
chassis uses an intelligent, adaptive cooling scheme to efficiently remove heat
while maintaining quiet operation. When you set the blower to variable speed
(default), the chassis automatically adjusts the blower speed to keep the
temperature rise above the modules to approximately 10
°
C or less. Using a rear
panel switch, you can set the blower to full speed to provide maximum cooling
at all times.
Air is exhausted at the sides of the chassis allowing you to stack the expansion
chassis with the benchtop chassis or other rackmount equipment. You do not
have to to worry about restricting any airflow out of the top of the chassis or
creating a chimney effect.
Card guides and airflow shutters automatically direct air to only those slots
containing modules and empty slots are shut off. The chassis directs airflow
across each installed module from the bottom to the top of each slot. Baffles
balance the airflow from the front to back and across occupied slots in the
chassis.
Power Supply
Intelligent Cooling