Lesson 2/Learning Event 6
Control
Indicator
Function
PATTERN SELECTOR Selects character or message to be transmitted.
(rotary switch)
SW Pos
Action
REVERSALS
The transmitter generates continuous
alternate marks and spaces at the
selected bit rate.
This test set
cannot measure distortion on reversals;
it
needs
miscellaneous
signals
or
repeated characters.
SELECTED
The transmitter generates a
CHAR
single
character
repeatedly.
The
character is formed by positioning the
MARK-SPACE front panel push button
switches. When pushed in, the pulse is
a mark; when left out, the pulse is a
space.
IDLE CHAR
The transmitter generates a single
character repeatedly to simulate the
idle
condition
of
time-division-
multiplex
transmission.
The
information is selected by internal
slide switches.
TEST
The transmitter generates a
MESSAGE
standard "fox" message.
The
message
contents is programmed by a
plug-in
wired circuit card.
CODE LEVEL
Selects the number of information bits (5 to 8) per
(rotary
character to be transmitted, and determines whether
switch)
the transmitted character is start-stop (asynchronous) or
synchronous.
BAUD RATE
Selects the keying rate, which is determined by the
(rotary
clock divider chain of the data analyzer.
switch )
PERCENT
Determines percentage of distortion that will be
DISTORTION
placed on transmitted signal. Adjustable to a
(notched turn
maximum of 49 percent.
switch)
49
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