Lesson 2/Learning Event 8
Control
Indicator
Function
UNITS
Circuit works in conjunction with SYNC-START-STOP toggle
INTERVALS
switch.
This control arranges the circuit to receive
(rotary
start-stop telegraph code signals having from 7 to 16
switch)
pulses. With Baudot code signals, the control remains on
switch position 7.
INPUT
Selects the type of signal to be measured.
SELECT
SW Pos
Action
POLAR
Arranges analyzer for
20-
or
30-ma
polar input signals.
20 MA NEUT
Arranges analyzer
for
20-ma
neutral
input signals.
60 MA NEUT
Arranges analyzer
for
60-ma
neutral
input signals.
HIGH V
Arranges analyzer for 130-volt polar
input signal.
MED V
Arranges analyzer
for
48-volt
polar
input signal.
LOW V
Arranges analyzes for 5- to 20-volt
polar input signal.
INPUT
Indicates condition of input signal. When illuminated, a
(lamp)
mark is being received; when unlit, a space is being
received; when blinking, a telegraph signal is being
received.
SW Pos
Action
FILTER
IN
Removes transient impulses that may be
(2-position
present on extremely noisy lines.
toggle
switch)
OUT
Removes the filter from analyzer input
Filter must be removed
when
analyzer
is
receiving
data
signals because of the band-limiting
effect of the filter.
54
Previous Page
