Radiometric devices >> selective voltmeters, voltage disturbance recorders and instrumentation antennas

FMA11

43 999 RUB
21 120 UAH
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Antenna FMA11. Is designedto measure the field intensity (FMA 11, FMA-11)
 
Antenna FMA11 is a combination of the frame and whip antenna, designed to measure the field strength and use with a frequencies range from 0.009 MHz to 30MHz. In combination with a selective voltmeter type SMV 11, it is used in sets for measurement of radio disturbance and useful field intensity at the specified frequency range.
 
 Technical characteristics
 
Type of antenna - is a combination of frame and vertical whip antennas, converted by selective framing device in order to adjust  antenna frame or pin;
Antenna
s frame quantity  - 2;
Characteristics of the antenna pin - the pin with a fixed length;
FMA11
Frequency range - from 0.009 MHz to 30 MHz
Switchable subranges for frame, pin antenna and corresponding antennas frame:
 
 
   
frame 1
frame 2
0.009 MHz -0.021 MHz
1.6 MHz -4.01 MHz
0.02 MHz -0.041 MHz
4.0 MHz -10.01 MHz
0.04 MHz -0.081 MHz
10.0 MHz -17.51 MHz
0.08 MHz -0.151 MHz
17.5 MHz -30.0 MHz
0.15 MHz -0.31 MHz
-
0.30 MHz -0.61 MHz
-
0.60 MHz -1.61 MHz
-
 
Switching sub-bands frequency is an automatic switching, carried by a selective type microvoltmeter SMV 11 through the connecting cable which dependson receivers frequency;

Directional characteristics FMA11: 
 
- Frame antenna:
     The horizontal directional pattern - corresponds to the diagram of magnetic field orientation;
     Symmetry (ratio of maximum to minimum voltage
of the receiver in the horizontal pattern) -> 20 dB;
 
 
 - Whip Antenna:
The horizontal directional pattern - circular (undirected characteristic);
Setting the direction of receiving frame antenna –
is provided manually by turning the frame on the device to configure;
Setting range - gradually from 0 º to 360 º;
Indication - graduated scale division of 5 °;
    Output parameters
of FMA11:
The nominal value of output impedance - Z = 50 cm;
The reflection coefficient - | r | ≤ 0,33;
Type of connection –
high friquency socket 3/7 (2 separate outputs for frame and pin antennas);
Characteristics of FMA11intensityfieldmeasurements:     
Intensity field values received in dB (mkV ∙ m-1 as the sum of measured voltages in dB / mkV / on a consistent antennas output and correction factor K [dB (m-1)] which depends on frequency;
     Correction Factor:
   Calibration Terms:
-
Frame antenna - the coefficient K is valid for a maximum of the directivity (the main direction of receiver). Calibration is realized normaly by certain field intensity:
Е = Zo∙H (Zo=377 ohm)
E [dB (m
kV ∙ m-1)] = H [dB (mkV m-1)]+51.5 dB;
- Whip antenna - K factor is valid for thedevices measuring according to CISPR-issue 1A (for calibration in near-field: a joint antennas arrangement and a receiver antenna should be located  on a metal table 1x1m areawith the heighthigher than the base of antenna 1.2 m);
Coefficient task is counted with the help of correction cards and included into the set scopes for each antenna to theintensity field;
Guaranteed values
​​FMA11:
 
 
CoefficientK withselectedfrequencies
Frame antenna
Whip antenna
10 kHz
62.2 dB ±1 dB
59.8 dB ±1 dB
400 kHz
45.0 dB ±1 dB
43.0 dB ±1 dB
30 MHz
29.8 dB ±1 dB
13.0 dB ±1 dB
 
The minimal measured field strength on selective microvoltmeter SMV 11 – is obtained as the sum of the minimum measured voltage U [dB (mkV)] on selective microvoltmeter SMV 11 for the appropriate bandwidth and the type of measured results, as well as frequency-dependent coefficient K [dB (m-1)] , which should be selected from thefield intensitycalibration table;
Typical values ​​with selected frequencies:
-
Indication type AV 1, sinusoidal signals, the additional measurement error caused bythe intrinsic noise
 
      
≤1 dB
Frame antenna
Whip antenna
9kHz, V = 200Hz
53 dB = 450mkV/ m
50 dB = 320mkV/ m
150k Hz, V = 200Hz
31 dB = 35mkV/ m
27 dB = 22mkV/ m
30MHz, V = 200Hz
10 dB = 3.2mkV/ m
-7 dB = 0.45mkV/ m
 
- indication type QR, sinusoidal signals, the additional measurement error caused bythe intrinsic noise
 
 
≤1 dB
Frame antenna
Whip antenna
9 kHz, V = 200 Hz
53 dB = 450 mkV/ m
50 dB = 320 mkV/ m
150 kHz, V = 200 Hz
36 dB = 63 mkV/ m
32 dB = 40 mkV/ m
150 kHz, V = 9 kHz
49 dB = 280 mkV/ m
46 dB = 200 mkV/ m
30МHz, В = 9 kHz
30 dB = 32 mkV/ m
13 dB = 4.5 mkV/ m
 
Max field strength measurement FMA11:
- indication
type AV1
 
 
sinusoidal signals
Frame antenna
Whip antenna
9 kHz -30МHz
V=200 Hz
130 dB =3.2V/m
130 dB =3.2V/m
 
- indicationtype QP
 
sinusoidal signals
Frame antenna
Whip antenna
9 kHz -150 kHz
V=200 Hz
130 dB =3.2 V/m
130 dB =3.2 V/m
150 kHz -17.5МHz
V=9 kHz
130 dB =3.2 V/m
130 dB =3.2 V/m
17.5МHz -30МHz
V=9 kHz
130 dB дБ=3.2 V/m
120 dB =1 V/m
 
   
The measurementfieldintensity accuracy error of antenna FMA11with selective microvoltmeter SMV 11 (mode "whip antenna" for the measuring device only, issue 1A);
The basic
accuracy error in the value of the reflection coefficient of the receivers input impedance | r | ≤ 0,1 (high-frequency attenuation ≥ 10 dB) at temperature  23 ° C ± 2 ° C - ± 2,0 dB;
Basic accuracy error depanding on temperature - ± 0,3 dB/10 ° C;
Additional error in the value of the reflection coefficient of the
receivers input impedance | r | ≤ 0,33 - ± 1,0 dB;
      
 
 Power supply FMA11:
 Protective low voltage from selective microvoltmeter SMV 11 - 15 V-0. 5V;
 Power consumption - 1W;
 Control signals for frequencyswitching:
     Type of signal:
- Binary coded control signal isparallel 4 bits;
The signal level - lower from 0V to 2V,
higherfrom 13V to 15V;
 
Work Time duration of FMA 11:
-
for electronic modules - continuous operation time, subjected to climatic conditions;
Ambient temperature range - 25 º C. .. +45 ° C;
Related extreme
temperatures in the natural climatic conditions (temperature / humidity) - +30 º C/95%;
Rated wind velocity with a tripod SMV 11 and height antenna location 1.2 m - ≤ 60km / h without special actions, up to 120km / h with a further strengthening of the tripod on the ground surface;
    Dimensions:
Setting device  – 325x325x200mm;
Diameter of the frame - 600mm;
Length of the antenna
s pin - 1m;
Weight:
Setting device  - 2 frames, an whip antenna - 14kg.

Photos FMA11

FMA11 device image.
FMA11 device image.
FMA11 accessories and spare parts.
FMA11 accessories and spare parts.
FMA11 front view.
FMA11 front view.
FMA11 side view.
FMA11 side view.
FMA11 overhead view.
FMA11 overhead view.
FMA11 bottom view.
FMA11 bottom view.
FMA11 drawing.
FMA11 drawing.


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