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Table 3-1.
Controls and Indicators (cont.)
CONTROL/INDICATOR
LEVEL
1
HI LED
NOR LED
LOW LED
LEVEL
2
HI LED
NOR LED
LOW LED
MARK and SPACE
displays
FREQ/ Af switches
MARK and SPACE LEDS
(above mark and
space displays)
FUNCTION
Indicates input
1
level.
Level greater than 0 dBm.
Level between 0 dBm and -20
Level less than -20 dBm.
Indicates input 2 level.
Level
Level
Level
greater than 0 dBm.
between
0
dBm and -20
less than -20 dBm.
N 0 T E
Level indicators
correspond to setting
of input switch.
dBm.
dBm.
Each may display a number from 0 to
199 and
when multiplied
by Af is
equal to the tone frequency.
Leading
zeros are blanked.
The units and
tens
digits
are
blanked
if
the
corresponding
phase
locked loop is
out of lock.
Three switches for
each tone, one
corresponding
to
each
digit
displayed.
Pushing
switch
down
decrements one digit.
Pushing the
switch
up
increments
one
digit.
Wraparound from zero to nine and from
nine to zero is included for units
and tens.
Wraparound from zero to
one and one to zero is included for
the hundreds digit.
Indicate keying of mark and space
tones.
3-2
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