Studio Technologies 92 - Manual (Page 16)

Issue 1, December 2006 Model 92 User Guide
Page 16 Studio Technologies, Inc.
OK result. This will identify that the fanout’s
XLR connector has been labeled with the
incorrect channel number. After channel 1
has been tested remove its associated male
XLR connector from the Model 92 and in
its place connect the connector associated
with channel 2. Use the manual channel
select buttons to select channel 2 for test-
ing. Repeat this process for all twelve of the
fanout’s channels.
Note that in the FK37-F to XLR-M cable
mode only channel mode is available. In
addition, the auto test and continuous auto
test sequences are not available. Also, the
Model 92 doesn’t directly support fanouts
that contain a mixture of male and female
XLR connectors. In this case the use of
gender changers or “turn arounds” is
recommended.
System Mode: Local
Cable Mode: XLR to XLR
In the XLR to XLR cable mode the Model 92
allows testing of standard audio cables that
use a 3-pin male XLR connector on one end
and a 3-pin female XLR connector on the
other. Begin by plugging the cable’s female
connector into the Model 92’s male connec-
tor, located on the left side of the unit. The
cable’s male connector should mate with
the female connector located on the right
side of the Model 92. Testing can take place
in either the channel mode or the pin mode.
In the channel mode the left two display
digits will always show XL, indicating that
the XLR to XLR cable mode is active. The
right two digits will either show OK or one or
more of the nine error codes.
In the pin mode the light indicating that
XLR to XLR mode is active will also flash. In
this mode the left two digits will display the
pin selected for testing. The exact text will
be X1, X2, or X3, indicating XLR connector
pins 1, 2, or 3. The up and down buttons
are used to select the desired pin. The right
two digits will show the pin or pins that are
connected to the pin selected for testing.
Repeat testing of the cable, when in chan-
nel mode, or the specific pin, when in the
pin mode, will take place. The displayed
results will refresh with each test cycle.
Master/Slave Mode Operation
A challenge is encountered when testing
cable assemblies where both ends can’t
be physically connected to one Model 92.
This occurs in cases such as where DT12s
are permanently installed in stadiums and
arenas, or when portable cabling has been
“run” and can’t be accessed easily. Using
two Model 92 units, virtually any DT12 cable
assembly, fan out, or even 3-pin XLR cables
can be tested.
The master/slave mode is created in the
Model 92’s hardware and software so that
the unit’s functions are “split” into a send-
test-signals portion and a receive-test-
signals portion. A communications link is
established between two Model 92 units,
allowing the two functions, send and re-
ceive, to work together. The data passing
in each direction on the data link effectively
“couples” the two Model 92 units into one.
One unit is designated as “master” and co-
ordinates the activities of a test. The “slave”
unit follows the commands of the master,
performing the actions requested and re-
turning test results as required.
Master/slave testing operation is quite easy
to initiate and use. But the flexibility pro-
vided by the Model 92’s multiple operating
modes can be a bit tricky to get one’s head
around. While this user guide will document
the basic “hows and whys” of master/slave