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H
52005- 301D
three
dia
l
s
from the dBm
valu
e
of input power indicated by the
input
meter
and
its
ran~c
switch
.
Vo
ltage
ou tpu
t
48.
When the output impedance is
arranged
to be GOO
nand
the load matches th
is
value
, the
output
voltage developed across the load is the i nput
vo
ltage
reduced by the
t
ota
l
attenuation
reading
.
The outpu
t
voltage
i
s
therefore
t
he
input voltage
m
u
ltipl
ied by the
appr op
riate factor
(Table
1
)
.
Alternatively, the
output
voltage across a
GOO
n load
can
be determined fro
m
the
dBm value
of
the
out
put read from the meter and dials (Fig. :l)
.
Rat
io down
Voltage
Power
1·0
1·0
·9886
·9772
·9772
·9550
·9661
·9333
·9550
·9120
·9441
·8913
·9333
·8710
·9226
·8511
·9120
·8318
·9016
·8128
·8913
·7943
·871
0
·7586
·8511
·7244
·8318
·6918
·8128
·6607
·7943
·6310
·7762
·6026
·7586
·57
54
·7413
·5495
·7244
·5248
·7079
·5012
-6683
·4467
·6310
·3981
·5957
·3548
·5623
·3162
·5309
·2818
·5012
·251
2
-4467
·1
995
·3981
·1
585
·3548
·1259
·3162
·1000
·2818
·07943
·2512
·06310
·2239
·05012
·1995
·03981
·1778
·03162
Nov.
79
TABL
E
1
Decibel conversion
Decibels
0
·1
·2
·3
·4
·5
·6
·1
·8
·9
1·0
1·2
1·4
1·6
1·8
2·0
2·2
2·4
2·6
2·8
3-0
3·5
4·0
4·5
S·O
S·S
6
7
8
9
1(1
11
12
13
14
tS
Ratio
up
Voltage
1·0
1·012
1·023
1·035
1·047
1·059
1·072
1·084
1·096
1·109
1·122
1·148
1·175
1·202
1·230
1·259
1·
288
1·318
1·349
1·380
1·413
1·496
1·585
1·679
1·778
1·884
1·995
2·239
2·512
2·81
8
3·1
62
3·548
3·981
4·467
5·012
5·623
Power
1·0
1·023
1·047
1·072
1·096
1·122
1·148
1·175
1·202
1·230
1·259
1·318
1·380
1·445
1·514
1·585
1·660
1·738
1·820
1-905
1·995
2·239
2·512
2·818
3·162
3·548
3·981
5·012
6·310
7·943
10·000
12·59
15·85
19·95
25·12
31 ·62
Chap
.
3
Pa~e
9
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