Potomac Instruments FIM-21 - Page 9

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SECTION
1.
GENERAL
DESCRIPTION
(Cont.)
Table
l -
2.
Specifications:
Type FlN-41
Field
Str
ength
Meter
Frequency Range:
Field
Strength
Rang
e:
Accuracy
of
Calibration
:
Accuracy
of
Range
Attenuator
:
Selectivity
Bandwidth (6
db);
IF
Rejection
:
Image
Rejection:
Adjacent Channel
Rejection:
Harmonic Measurement:
Panel
M
eter:
Antenna:
Audio
Outputs:
Recorder
Output:
Lights
:
Batteries
:
1-3
. 54
MHz
-
5.0
MHz
in
two bands
Band
11
A
11
•
535 -
1.61
MHz
Band
11
B
11
1.58
-
5.0
MHz
10
microvolts
pe
r
meter
to
10
volts
per
meter
1
percent,
referenced
to
NBS
Standard
Field
2
percent
over
entire
FI
range
and
t
uning
band
7
KHz
nominal
with
multi-pole
hybrid
filter
75 db
mini.nn.un
80
db
(min.)
at
540
KHz
decreasing
to
50 db
(min.)
at
4.8
MHz
50
db
minimum
10
KHz
above and below
tuned
station
Capable
of
measuring
harmonics
in
excess
of
80 db below fundamental
4
11
mirrored
scale,
logarithmic
grad-
uations
1
to
10
and
linear
db
.
scale;
taut
band meter movement,
2%
linearity
Shielded
loop,
integral
part
of
hinged
cover
Front
panel
loud
speaker,
weather
treated
cone - headphone
jack,
high
and
low
Z
(disconnects
speaker
)
0.4
to
4
volts
DC
proportional
to
field
st
rength
for
each
attenuator
range,
2000
ohm
source
resistance
Frequency
dial
and m
eter
with
panel
switch
for
night
use
Standard
1-1/2
volt
C-
Zn
11
D
11
cells
or
l-1/2
volt.
Alkal...ine
cells
for
extended
life
at
very
low
tempera-
tures
(
six
req..uired)