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The KL-900B Analog Communication
System is a comprehensive and self-contained system based on
the 144 MHz VHF Transceiver suitable for anyone engaged in
Analog Communication experiments. The purpose of the system is
to enable the student to acquire a clear experimental view of
the concepts and a familiarization with the operative aspects of
the work in the Telecommunication Laboratory.
FEATURES
a
144MHz VHF FM Tranceiver Trainer.
a
2 modules form basis for over 9 fully
documented experiments.
a
Includes Experiment and Instructor's
Manual.
ANALOGUE
COMMUNICATION MODULES
2 analog communication
modules (KL-93051 and KL-93052) are included in the
KL-900B system, as follows:
|
General Characteristics |
|
Frequency Range |
144-146 or 144-148MHz |
|
PLL Range |
130-170MHz |
|
Modulation Type |
F3 |
|
Channel Setting Step |
5, 10, 12.5, 20, 25, 50kHz |
|
Antenna Impedance |
50ohm |
|
Squelch Sensitivity |
0.16uVmax |
|
Audio Output |
250mW |
|
Maximum Offset |
+/-5kHz |
|
1st IF Signal |
21.8MHz |
|
2nd IF Signal |
455kHz |
|
Keypad Functions |
|
SQL |
To eliminate the "ZA"
noise on FM |
|
Volume |
Power switch/volume
control |
|
TX/RX LED |
Signal transmitter/receiver
indicator (red transmitter, green transceiver) |
|
Channel |
Chennel selector |
|
MS Socket |
External microphone or
speaker |
|
Function Key |
|
|
PTT |
Exchange transmitting and
receiving function |
ACCESSORIES
An accessories kit is included with the
KL-900B system, as follows:
KL-98002:
-
AC power cord:
1 piece
-
Experiment
manual: 1piece
-
Instructors
manual: 1 piece
-
VHF FM
Tranceiver: 1 set
LIST OF EXPERIMENTS
-
Analogue Communications System Introduction
-
Hardware Reset
-
Knowing SET
Frequency
-
Knowing 2
Function Operation
-
Knowing SET Key
Function
- Microphone Amplifier
-
Active Filter
Circuit on the Microphone Amplifier
-
Low Pass Filter
Circuit on the Microphone Amplifier
-
Measuring the
Frequency Response of the Passive High-Pass Filter
-
Measuring the
Frequency Response of the Active Low-Pass Filter
- Phase-Lock Loop (PLL) Circuits
-
Observe the
MB1504 Phase-Lock Detector Characteristics
-
Measuring the
Lock Timing
-
Measuring the
LM565 Phase-Lock Circuit Characteristics
-
Measuring the
LM565 Phase-Lock Circuit Gain Factor
- Voltage Controlled Oscillator
(VCO) Circuit
-
Measuring the
VCO Gain of the Transceiver
-
Measuring the
VCO Noise
-
Measuring the
VCO Gain of the Receiver
-
VCO Circuit
Simulation
- Power Amplifier
-
Gain Frequency
Response of the Transceiver System
-
Measuring the
Automatic Gain Control Loop (APC) of the Power Amplifier
- RF Amplifier
-
Measuring the
Linear Frequency Response of the RF Amplifier
-
Measuring the
Non-Linear Frequency Response of the RF Amplifier
-
Band-Pass
Filter Circuit Simulation
-
Low Noise
Amplifier Circuit Simulation
-
RF Amplifier
Circuit Simulation
- Mixer and IF Circuit
-
Measuring the
Mixer Exchange Gain
-
Measuring the
Gain of the Crystal Filter and the IF Amplifier
-
Mixer Circuit
Simulation
- FM Demodulation Circuit
-
Measuring the
IF Gain and Interrupt Loss of the FM Demodulation IC
-
Measuring the
Noise Strength of the FM Demodulation IC
-
Measuring the
Phase Detector Demodulation of the FM Demodulation IC
- Audio Amplifier
-
Measuring the
Power of the Audio Amplifier
-
Measuring the
Noise Ratio of the Receiver Circuit
-
Measuring the
Frequency Response of the Audio Amplifier
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