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ANTENNA SYSTEM TRAINER – 700MHz
MODEL: AST |
INTRODUCTION:
LAB Antenna System Trainer is a versatile trainer. Student can
understand the basic principles of EM theory and the directivity
patterns of various types of antennas.
The fundamental principles of radio waves, and the basic
operating action and characteristics of different types of
antennas can be studied.
TOPICS COVERED :
Study of VSWR (Voltage Standing Wave Ratio).
Study of Impedance.
Study of Antenna gain.
Study of Directional Antenna.
Measurements of Front to Back ratio (FBR)
Study of Radiation pattern: plotting of curve - Manual Rotation.
Study of Polarisation - Discrimination.
SOURCE:
1. RF Signal Generator : 700MHz Range.
2. Isotropic Radiator : 2Nos.
3. Field strength Meter
TYPES OF ANTENNAS: (EACH 1-NO)
4. Dipole Antenna
5. Folded Dipole Antenna
6. Yagi Antenna : 3 Element - Folded Dipole Radiator.
7. Yagi Antenna : 5 Element - Folded Dipole Radiator.
8. Yagi Antenna : 5 Element -Simple Dipole.
9. Yagi Antenna : 3Element -Simple Dipole
10. Yagi Antenna : 7 Element.
11. Ground Plane Antenna
12. Hertz Antenna
13. Zeep line Antenna
14. Slot antenna.
15. Loop Antenna.
16. Rhombus Antenna.
17. Phase array l /4.
18. Phase array l /2.
19. Log Periodic Antenna
20. Helical Antenna
21. Parabolic Antenna
22. Combined Collinear Array.
ACCESSORIES:
23. Stand
24. RF Coaxial Cable
25. Patch cord
26. Carrying case
27. User Manual
28. Cables. |
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CLICK TO ENLARGE |
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Pulse Code Modulation
Transmitter Trainer |
Introduction:
This trainer is a single glass epoxy
printed circuit board with legends neatly screen printed in
multi colour on the front side and all the components are
soldered back side of the PCB to avoid tampering of fixed
components like resistors, capacitors, transistors, diodes,
and variable components like potentiometers are mounted on the
front side of the PCB for making linear measurements.
Features :-
1.
Crystal Controlled Clock
2. On-board Sine wave generator (Synchronized)
3. 2 TDM Analog Channels.
4. PCM Transmitter.
5. Fast and Slow modes for real time operation and data
flow examination.
6. Error check code options (odd-even parity, Hamming
Code).
7. 4 Switched faults allow different Error Check Options.
Technical Specifications
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Crystal Frequency
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12 MHz |
On Board Generators |
1. Adjustable Amplitude Sine
wave generator of 1 & 2KHz freq. (synchronized)
2. Variable Amplitude DC Level (2 Nos) |
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Input Channels
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Two |
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Multiplexing
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Pulse Code Modulation
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Sync Signals |
Pseudo Random Sync. Code
Generator |
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Error Check Code |
Off-Odd-Even-Hamming
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Operating Modes |
Fast
16KHz / channel (approx)
Slow 68MHz / channel (approx) |
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Test Points |
44
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Interconnections |
Sockets |
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Power |
230V 10% 50Hz |
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Accessories Included
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Manual, set of patch wires. |
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TDM-PCM Receiver Trainer
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This trainer is a single glass
epoxy printed circuit board with legends neatly screen printed
in multi colour on the front side and all the components are
soldered back side of the pcb to avoid tampering of fixed
components like resistors, capacitors, transistors, diodes, and
variable components like potentiometers are mounted on the front
side of the PCB for making linear measurements.
Features
1.
Input accepts two channel multiplexed data.
2. On board demultiplexed PCM receiver.
3. On board L.P filter.
4. Fast & slow operation and examination of control signal and
data on LED.
5. On board PLL for clock regeneration.
6. On board sync code detector.
7. Error check code options.
a) Odd or Even parity single bit error detection.
b) Hamming code single bit error detection and correction.
8. 4-switched faults allow different error code option.
Technical Specifications
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Input Channels
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Two time division
Multiplexed Serial Input |
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Demodulation
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Pulse Code
Demodulation |
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Clock
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Regeneration by phase locked loop. Low |
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Low Pass Filter
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Butter worth 4th order 3.4KHz cut off freq. (2nos)
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Operating modes
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Fast - 16
KHz / channel
Slow - 68MHz/channel |
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Error Detection
(single bit) |
off-odd & even parity, hamming code
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Error Correction
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Hamming code |
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Test Points
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56. |
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Interconnections
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2mm Sockets |
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Power
requirements |
230V 10%, 50Hz |
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Accessories
Included |
Manual, Set of
patch wires |
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Data Formatting & Carrier
Modulation Transmitter Trainer |
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Features:
1. On - Board carrier generation circuit (Sine waves
synchronized to transmitter data.)
2. Different data conditioning formats NRZ (L), NRZ (M), RZ,
Biphase (Manchester), Biphase (MRK, AMI, and RB), differentially
encoded dibit pair.
3. FSK, PSK, ASK & QPSK modulation.
4. Variable carrier and modulation off - set.
5. Variable carrier gain.
6. On - Board unipolar to bipolar conversion.
7. On - Board data inverter.
Technical Specifications:
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Data formats |
NRZ (L), NRZ (M), RZ, AMI, RB,
Biphase (Mark)
Differentially encoded dibit pair. |
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Carrier modulation |
FSK, PSK, ASK, QPSK.
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On - Board Carrier |
Sine waves synchronized to
transmitted data at 1.44 MHz, 960 KHz,
(0 - deg. Phase) 960 KHz, (90 deg.phase). |
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Power |
230V 10%, 50Hz |
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Dimensions (mm) |
457 x 445 x 82 |
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Weight |
7Kgs. |
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Accessories included : |
Manual, Set of patch cords.
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NOTE: Refer circuit
diagrams and descriptions provided in the manual.
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Carrier Demodulation and Data
Reformatting Receiver Trainer |
Features:
1. 7 different data reconditioning formats NRZ (M), RZ, AMI, RB
Biphase (Manchester), Biphase (Mark),
differentially encoded dibit to NRZ data.
2. FSK, PSK, ASK & QPSK Carrier Demodulation.
3. Square wave data output.
4. On-Board Biphase Clock recovers circuit.
5. On-Board data squaring circuit and differential decoder.
6. On-Board Butter worth filters - 4'th order (2nos)
Technical Specifications:
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Input : |
From Model I8. |
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Output : |
Data output. |
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Demodulation Options : |
NRZ (M), RZ, AMI, RB, Biphase
(Manchester), Biphase (Mark) differentially encoded dibit
pair to NRZ (L) |
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Carrier Demodulation :
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1. ASK - Rectifier diode. 2.
FSK - PLL detector. 3. PSK- Square loop detector. 4. QPSK
-Fourth power loop detector. |
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Biphase Clock Recover :
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By PLL. |
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Accessories included :
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Manuals, set of patch cords,
line cord. |
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Test point : |
51. |
Power :
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230V +/- 10 % 50 Hz
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Dimension (mm) : |
457 x 445 x 82 |
Weight :
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7 Kg (Approx) |
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