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T
h e negative outpu t fro m IC1 also turns off 02, t hu s
rem ovi ng t h e s h ort on pin 7 of ti m e r IC2 . Th is allows the
timer to operate ας an ατ t αΙιΙπ ι>sειΙΙαΙο r, T h e
οιι f ΙιιιΙ ,
pin 3
π 1 Ις 2, t h en varies between 0 a nd 7 volts . Thm causes 03,
t
h e LF D driver, to τιιιιρΙγ
ιαα r πηι
inlermitten r ly in t h e
έ r πη t- p anel UNLEVE I ED light, causi n g it to flas h .
After t h e RF overloa
d
i5
rem πν .λ , Ις 1 Call be nnilMhcd by
mome n ta r ily
r
emoving AC power fro m th e inst u rmenl .
O
PER ATIO N
C
HE C K
T h e followi n g procedure is reco mm en d ed to insure propp.i
operation of t h e protection
d
evice . Th e top cove r mu st
b
e
rem ove d fro m
t
h e i n str um e n t .
Wit h
t
h e i n str um e n t operati ng
n
o r mally i n t h e C W m od e,
set t he ουτρυτ level to 1 5
d
β m . Connect α 50 o h m detector
to t h e output of t h e sig n al generator- T h e DC output of
t
he
d
etecto r
sh oul d
be
m
onitore d
on
α
s
u itable
oscilloscope. Set the output frertuency to 100 MHz .
Th e circuitry in
t h e Μ 35-1 is ch ec k ed
b
y pushing the
m
o
m
entary switch located nn ιπςι of Ιιω module-
T h is
switc h lowers t h e t r i p level of th e module . W h ile holding
down t h e s
w
kc h , slowly
ricrea τ e t h e output οΙ lhv unit
using t h e O UT PUT VERN I ER u ntil t h e Μ 35-1 trips . Τ h ίτ
causes
t h e
circuit
brea k e r
to
open
and
latc h ,
t h e
UN L E V ELE D
ligh t to flesh,
and the detected output
displayed oil
the
η s ειΙΙοsr πυe to go to zero .
ihe circuit
b
reaker can then
h
π reset by momentarily ηιηη im η t h e AC .
P
OW ER switc h off . The Μ 35-1
s
h oul d h ave tripped at 17 .5
dB m tl
d
8 .
Perform t h e sam e rest at 500 MHz . It sho u l d
t h en tri p at
all
output level οι 410.5
d
βm α 2
d
0 .
8/3-2
'J2
F
ig ιι re 8/3-1 .
β l ο c " Πίαη r ασ
T
h e above procedure, w h ile not α com p lete performance
c h ec k ,
ι 5 considered
a d e qu ate
f
or
most applications-
Λι 1 ι 1 ίιιιιιι ;ιΙ Ιο s1 τ r ιιιι Ιιι " ρι r ι ( π rm ικ 1 οαλ rtsirr! ι 1
F<κ rικ : ιιης 9 π ,
insertion loss and VSWR
can
he checked in the same
manner ω . ιυιν Ιια "m νπ
d
evice .
Also, if αναίΙαΙιΙο ,
.
ι high
power RF ~ ίΓριαΙ s ιιιι rr ο., set . far an out pu t of slig htly ιινπι .1
W
ran
be ιιω
d
in verify circ u it
b
rea k er operation,
M
AI NT EN AN CE
The only m αίηιρηαη ce for the AF circu it
b
rea k er is pern d ic
t π s ιίηη in ί " ^,ιι r ε -ts πρε r ατίοπ .
If α malfunction πε c ιι r" , σ
trou b le can he localized and repaired wit h th e aid of th e
t h ewy of operation and t h e sc he m atic . If the
p
ro blem is α
d
efective m0nr r ο r
d
iode, ca r e s h oul d be o b serve d to kee p
lead Ιρηρι 1, αηλ position t h e sa m e
as the original diode .
Option 3 can
be facto r y or fiel d installe d
T
h e f οΙΙιιωπιρ
pr oced u re s h ou ld
b
e followe d for field i nstallatio n . Install
t h e Μ 35- Ι module in th e location shown in
F
igu r e 813-2
and se ειιπ"
vi ι h the 6-32 hold-dπωη screw .
Remove
t
h
e Ιιυπι
R F rιιιΙί "tιί cal λ e, 1 ιν 1 αηd " e μιαεe wit
h
Wl Α
an d W 1 β w
h
ic h will route t h e RF
o
u t pu t sig n al Ι h r ιι t h e
M 3 5 1
m ηιΙιιί e
R π t ηιιυιι , in, ιηπ d ιιΙ e should be tested by the pToceduirt
d
e ι ., λι `d πι ί7 ρειατίοπ
C
h ec k .
OPTION 3 FI EL D
I
N STA LL ATIO
N
KIT
ι tι
Γ
,
ί
ou
r
v
ur
/
ΤΟ r
R
O
N
7't
-4
NrL
l
R!-
Ο
d
ΤΟυΓ 6ΟΝΝ (6
ΤΟ
-
ξ
)
ΤΟ F40Nr
-~
N6 L
<iNLr
V
r
L L
laNr
ΟΤ y
ΓιΓ S ΓΓi ΙΡΤΙΟΝ
P
A R T NO
1
R F C ί r ειιί t
B
rea k er Module
M35 1
1
RF Ca b le
WIA
Ι
RF Ca
b
le
WIB
1
6 .32 κ 5! 1 6 Screw
2810-17-6105
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