Studio Technologies 93 - Manual (Page 5)

Model 93 User Guide Issue 1, January 2008
Studio Technologies, Inc. Page 5
Introduction
The Model 93 is designed to test the integrity
of W1-type cable assemblies. Widely used
by the audio industry, “W1s” provide twelve
balanced signal pairs, each with an individu-
al shield. For live production and broadcast
applications it’s critical that all signal paths
are fully functional. But without specialized
test equipment it’s impossible to confirm W1
performance. The Model 93 accomplishes
this task in a simple-to-use but technically
sophisticated manner—it’s far from just a
continuity checker. Under software control,
the internal microcontroller-based circuitry
independently tests each signal pin for
connectivity, opens, and shorts. The Model
93 can ensure that the value of a produc-
tion company’s significant investment in W1
cable assemblies is maximized. When two
Model 93 units are used together they can
prove invaluable for facilities that include
permanently installed W1 cabling.
For operator convenience, testing can be
selected from among two formats: channel
mode or pin mode. Channel mode is pro-
vided specifically for field applications where
Figure 1. Model 93 Top View
testing is most effective when oriented
toward how a W1 is actually used. Pin mode
is oriented toward supporting technical
personnel who are responsible for fabricat-
ing or repairing cable assemblies. In both
modes solid-state displays indicate which
channel or pin is being tested, along with
the test result. For ease of use the Model
93 supports both automatic and manual
testing. The unit is housed in a rugged
aluminum enclosure and is constructed for
reliable “field” performance where abuse is
often a way of life. An internal rechargeable
battery provides the operating power.
When the Model 93’s channel mode is
selected, testing is organized as twelve
signal channels. Two of the display digits
indicate which channel is currently being
tested. The display digits, depending on
which mode is selected, can also display
the test results. The results can include ALL
OK and FAIL, as well as a number of error
codes. The codes allow conditions such as
open shields or pins, crossed signal pairs,
or short circuits to be displayed. In the pin
test mode, all 39 pins associated with the