Installation
and
Calibration
HP
11757B
Coaxial
Connectors
The
IF
INPUT
and
the
IF
OUTPUT
on
the
fron
t
panel,
and
the
A
UX
IF
OUT
on
the
rear
panel
require
75
BNC
male
mating
connectors
compatible
with
the
sp ecications
of
US
MIL-C-39012.
IF
Input
Signal
The
b est
F
ader
p erformance
is
found
at
IF
INPUT
lev
els
of
08
dBm.
P
erformance
is
v
ery
go
o d
to
03
dBm.
If
y
ou
ha
v
e
a
more
p o
w
erful
signal
use
an
attenuator
b efore
inputting
it
to
the
IF
Input
of
the
F
ader.
If
y
ou
ha
v
e
a
signal
that
is
m
uc
h
w
eak
er
than
08
dBm,
consider
using
an
amplier.
Caution
Do
not
input
p o
w
er
exceeding
+20
dBm
to
the
IF
Input
of
the
F
ader.
This
could
damage
the
instrumen
t.
Error
Pulse
Input
The
error
pulse
input
is
in
ternally
congurable
to
the
follo wing:
ECL
75
(default)
TTL
75
TTL
10k
V
ariable
threshold,
-2
v
olt
termination,
75
V
ariable
threshold,
0
v
olt
termination,
75
V
ariable
threshold,
0
v
olt
termination,
10k
T
o
make
the
appropriate
setting
press
the
4
RADIO
SETUP
5
k
ey
,
and
then
press
4
8
5
un
til
1
ERR
OR
TERM
is
display
ed.
Press
4
ENTER
5
and
use
4
8
5
to
toggle
through
the
options
listed
ab o
v
e.
Press
4
ENTER
5
again
when
y
ou
ha
v
e
the
correct
input
for
y
our
radio.
After
selecting
one
of
the
options
listed
ab o
v
e
and
pressing
4
ENTER
5,
the
selection
1.1
ERR
OR
THR
is
display
ed.
Press
4
ENTER
5
and
c
hange
the
trigger
12
