Curriculum
Details
Sample
Activities
SIP353C
AM/CW/SSB Transmitter
SCOPE OF THE STUDY
The AM/CW/SSB Transmitter radiates a modulated signal on 3.57 and 4 MHz. These signals
are modulated by selecting either two tones (750 KHz and 1800 KHz), 5 KHz, or voice
modulation from a built-in microphone. All of the tone oscillators utilize crystal
controlled synthesized circuitry.
A four-crystal lattice filter provides for removal of the upper or lower sideband, with or without carrier suppression.
A unique feature of the Transmitter is the built-in spectrum analyzer which enables the user to observe the RF signal using a frequency domain display. The carrier frequency can be observed before and during carrier suppression. Both sidebands can be observed, or either sideband can be filtered out. The spectrum analyzer section enables the viewer to completely view the characteristics of the carrier and sidebands, eliminating the need for very expensive commercial spectrum analysis test equipment.
The radiated output power is adjustable, so that the transmitter can serve as a generator. Transceiver operation is provided when two SIP353 Transmitters and two SIP329D SSB Receivers are used at one time. Each Transmitter-Receiver set operates on one of the two frequencies.
COURSE TIME: 60 hours
FEATURES
 | Transmitter of Radio Signals, SSB/DSB or AM Modulation; Short Distance Transmission |
| RF Crystal Stabilized Transmitter |
| Operates on Two Frequencies: 3.57 and 4 MHz |
| Upper or Lower Sideband Suppressed Carrier Operation |
| Utilizes Phase-Locked Loop and Crystal-Controlled Synthesizer Circuits for Stabilizing Oscillators |
| Output Power Approximately 60 mW (Minimum Power) |
| Built-in Spectrum Analyzer with Sideband Display |
| Built-in
Sweep Generator |
EXPERIMENTAL TOPICS
- AM/SSB Transmitter Modulation Methods
- Introduction to the AM and SSB Transmitter
- The Percentage of Modulation
- Overmodulation
- The Balanced Diode Modulator
- Balanced Modulation Using an IC
- Internal Structure of the ICI496
- Sideband Filters
- SSB Peak Power
- Heterodyning
- SSB Filtering Using the Phasing Method
- SSB Power Amplifiers
- AM Operation
- The Operation of the Spectrum Analyzer
- The Scanner
- Balance-Mixer/Oscillator NE602
- The NE/SA 604A Amplifier with Receive Signal Strength Indicator
- The Transceiver System
- The Audio Modulator
EQUIPMENT
| SIP353C-1P. SSB/AM Transmitter Panel |
| SIP329BM/353M. Laboratory Manual |
POWER
BASE REQUIRED
(1) S300PSB Power Supply Base
PANEL SPECIFICATIONS
The Transmitter is arranged so that it can be easily studied in the laboratory. All of the controls are readily available and clearly marked. Test points are provided so that the RF Signal, frequency multipliers, and oscillators can be observed.
The Panel is designed to be used with any of the Science Instruments Power Supply Bases, such as the S300PSB, or a Panel Base, S300PB.
The insertion Transmitter Panel is provided with a comprehensive Laboratory Manual (SIP329/353M), which also contains the SSB Receiver.