Studio Technologies 47A - Manual (Page 25)

Model 47A User Guide Issue 1, September 2014
Studio Technologies, Inc. Page 25
function has been disabled. They will then
be aware of the potential noise issues and
be ready to make corrections should a
problem arise.
Factory Test
Back-panel DIP switch 4 allows a factory
test mode to be enabled. During normal
operation DIP switch 4 should remain in its
off (down) position. When DIP switch 4 is in
its on (up) position factory mode is active
(enabled). Enabling this mode will result in
the following operating condition: during an
auto null sequence the associated 4-wire
output channel will remain active. This will
allow the tones associated with the nulling
process to be present on the 4-wire output.
While not appropriate during actual Model
47A use, it is interesting to “hear” the null-
ing process take place. But unless directed
by factory personnel DIP switch 4 should
remain in its off (down) position.
Technical Notes
Software Version Display
A special Model 47A power-up sequence
allows the unit’s software version number
to be displayed. This is useful when work-
ing with factory personnel on application
support and troubleshooting situations.
The five meter LEDs associated with FROM
4-wire channel 1 of interface 1 are used
to display the major release number with
a range of 1 through 5. The five meter
LEDs associated with TO 4-wire channel
1 of interface 1 are used to display the
release sub-number which again ranges
from 1 through 5. Refer to Figure 11 for a
detailed view of the meter LEDs and the
corresponding software version numbering
scheme. The Model 47A’s initial software
release is version 1.1 which is represented
by the –18 LEDs of each meter column
being lit.
Figure 11. Detail of front panel showing the status LEDs that display the software version. In this
example, the software version is 1.1.
Major Release Number Release Sub-Number
O 4 .4 O
O 3 .3 O
O 2 .2 O
 1 .1 