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GENE RAL INFORMATION
This
f
acto r y-in stal led opt ion
requ ires
th e
addition
of
α
P
rog rammab le
Atte nuato r
and
Μ 42
Attenuator
Dr ive
m odule to t h e sta nd ard signa l generato r ,
and pro vid es
remote prog ramming of
t
he
RF
leve l
via
the
rear-p ane l
inpu t
connector
u
sing
8-4-2-1
BCD
con tact
c losu res
o r
ΤΤ I,
signa l s .
The
l
eve l
p rog r amm in g ra nge covers 0 to 90 dB in 10
d
B ste p s .
The 0 dB refe rence point is
set
to
the
desire d
l ev e l
by
t he
instrume nt
front-panel
attenuato rs .
R
emote se lection
of C W
o
r ΑΜ
m
ode
is
also
pro v i d ed
by
a
switch-contact
c l osure or α ΤΤL signal .
R
everse-power
protect ion
i
s
a l so
p rovid e d
by
t hi s
opt ion
to
prevent
damage
to t he in str um en t if DC (100
f
m
ax)
or R F
(50
W
αιαχ )
vol tages are
inadvertently applie d to t he i nstrumen t
BE OUT connector .
NOTE
DC p rotectio n
i
s
not i ncl ud ed on
Mod el 3002,
Du e to
t h e s l ig ht " in sertion loss" and
c
h a n ge
in flatness ca use d
b
y
addition
o f
t
he
Prog r ammable Atte nuato r
to the
instrument, i t will
n
ot be
possible to
obtain
+13
dBm
o
utpu t
at
all
f re qu enc i es,
therefore,
the
maximum
ca l ibrated
ou tpu t
i
s
+12
dBm
w
he n
Option 1 Β
i
s insta ll ed .
T
a b l e
8/ ΙΒ -1
li sts
i
n strume n t
spec if icat i ons whi c h
a
re additions to
or d ev i at i o ns
fr o m
t
he s pecificat io n s
given
in Sectio n
I of
the instrument
instruction manual .
R
e f e r to F i g u re 8/} Β -2
for
l
ocation of
ad d ed ιοαιρυηeπεs .
OPE RAT I N G
I
N STRUCT I O N S
Front-Panel Ope r at ion
OPTION 1B
RF LEVEL
PROG R A MM I N G
F
r ont-pane l operation remains bas ica lly
t
h e sa m e as f o r
α sta ndard inst r ument,
except
t h at
t he
ma x imum
cal ib rated
output
is
+12
d
B m.
H
oweve r ,
any
exte rna l
RF l eve l programming must
be
r
emoved
o
r
t
h e
f ro n t-pane l
i ndi cated
υυιρυ t
l
evel . w ill
b e incorrect .
Al so,
th e exter na l CW/ ΑΜ p r ogrammin g must
h e
set to AM in order for
the front- ρ anel
MODE switch to fun ct i on properly .
REM OTE PR OGRAMM I N G
S i x wires a r e
required to
co n nect t h e
re m ote
programming
sw i tc h es
or
ΤΤΙ .
s
i gn a l s to th e rear-panel
P
ROGRAMING
p
l ug (see Fig u re 8/1 Β-1) :
f
o ur
are
u sed f o r
l eve l
p
r og ramm ing,
one
f or
m
ode sel ect io n (C W
o
r AM), and
one is
common
(ground) .
8-4-2-1
B C D swi tc h
closures
o r
T
TL
s
i gna l s a r e
u
sed
to
select
th e atte n uato r 10 dB ste p s over
α ran ge o f 0 to 90 dB as sh ow n 1η
T
ab le
8/1 Β-2 .
After the pr ogramm ing switches have b ee n
connected to the rea r -pa n e l PR OGRAMIN G
p lu g, the
0 d B
re f e r e n ce po int is set
to th e des ired va lue b y the front-panel
a ε te nuato r s ;
th en , th e 10 d B ste p s a r e
8/1 Β-1
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