TFT 844 - Page 19

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3.5.11
Peak
Modulation
Peak
modulation
is
directly
read
on
the
peak
light
circuit.
Peak
modulation
can
be
determined
by
adjusting the
thumbwheel
switches
so
that
lights
and
counter
just
come
on
.
3.5.12
3.5.13
Incidental
and
Residual
AM
a. Applysignal of
transmitters
under
test
to
the
RF
INPUT
HI
LEVEL
jack.
b. Adjust
HI
LEVEL
INPUT
SET
until
the
SET
LED
ON
lamp
lights.
c.
Depress
AM
NOISE
function switch.
d.
With
the meter attenuator switches
select
an
attenuation
that
provides a usable reading
on
the
LEFT/TEST
meter.
e.
The
algebraic
sum
of
the selected attenuation
and
the meter readin9
is
the
AM
noise
level.
----NOTE----
THE
AM
NOISE
CAN
BE
READ
FRQ\1
THE
HIGH
LEVEL
RF
INPUT
ONLY.
Multipath
Noise
a. Depress the
MULTIPATH
function switch.
b.
With
the meter attenuation switches
select
an
attenuation
that
provides a usable reading
on
the
LEFT/TEST
meter.
c.
The
algebraic
sum
of the selected attenuation
and
the meter reading
is
the multipath noise
1
eve
1 •
----NOTE----
MULTIPATH
NOISE
CAN
BE
READ
FROM
THE
LOW
LEVEL
RF
INPUT
ONLY.
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