Modulation Input - HP 8340A Operating Manual

Model8340A
DESCRIPTION
The external pulse or am
two BNC connectors.
PANEL LAYOUT
FUNCTIONS
PULSE MODULATION INPUT is TTL
maximum selected
dB RF on/off ratio). The pulse r
>80
applications, 100 Hz
leveled in t h
e extended bandwidth mode ([SHIFT] [AM]).
the electrical requirements of the
effects on the RF output The da m
MODULATION INPUT accepts a -1 volt to + 1 vol
AM
kHz (3 dB bandwidth). With
is unaffected; at -1 volts input the RF is shut off, and at + 1 volts input the RF output is
100% (6 dB) higher than the
between the reference p
frequency). The on ( 0 volt input) to off( -1 volt input) ratio is a function of power level and
fr q u ncy but is always greater than 20 dB. The a m
e e
,
linearly as the AM
e l
le t r ic requirements of
c a
output D a ma g level for this inpu
e
litude modulation sig
p
(@)
co
RF p o w e r output, while a TTL l
e p e t
to 5 MHz w h en internally leveled, or 1 kHz to 5 MHz w
PULSE
g levels for this input arc> + 12 volts
e
a
an AM i n p u t
reference level (hence
o wer level and the maximum power level available at that
input changes from -1 to + 1 volts. Table 1-1
input, and
the AM
t is � + 12 volts or�
Figure 3-15.
Scans by HB9HCA and HB9FSX
ls
na applied
are
(@)
PULSE
AM
m p �tible; a TTL high input
o w input causes m
i on frequency is <le to 20 MHz in non-leveled
it
Table 1-1 (Specifications) details
modulation n ut, and e
i p
signal, at a frequency of de to 100
t
ofO volts, the RF output level (the
there.must be� 6 dB of
l ude of the RF output changes
p i
t
xpl ai the subsequent e ff
ns
e
12 volts.
-

Modulation Input

Op r at ng Information
e i
to the HP 8340A these
at
( > +2 volts) causes
i n im u m RF output (
h n in t er n al l y
e
plains the s u b
x se quent
-20 volts.
or�
r e fe rence level)
h eadroom
(Specifications) lists all
e c s on he RF
t t
3-29