Type 4280
MODULATION BOARD Type 4280
Type 4280 combines the important modulation methods on one board. An integrated short-circuit-proof signal source and synchronised power supply reduce setup time significantly. The system is designed for combined work with the demodulation board.
- All important modulation methods on one board
- Integrated short-circuit-proof signal source
- Built-in power supply for external setups
- Synchronised carrier and modulation frequencies
- Stable oscilloscope displays through internal supply
- Expandable with demodulation board Type 4281
Modulation methods
The board covers analogue, digital and pulse modulation methods. AM, SSB, FM, PM, PAM, PCM, PFM, PPM, DM, ASK, FSK and PSK can all be set up directly in the lab.
The integrated sources make it easier to compare the different methods under stable measurement conditions.
Lab use
The coupled carrier and modulation signals make reproducible oscilloscope displays possible. This makes the board suitable for beginners as well as more advanced exercises in communication engineering.
In combination with the demodulation board, complete transmission paths can be built and analysed.
- Mains supply
- 230 V AC / 115 V AC (110 V AC); 50 ... 60 Hz; 50 VA
- Output voltages
- +/-15 V / 0.15 A and +5 V / 0.2 A for external transmission paths and noise sources
- Signal source
- Ue ss < 5 V
- Filter range
- band-pass 15 ... 25 kHz; low-pass 0 ... 20 kHz
- Adapter field
- 4 mm to 2 mm sockets
- Board dimensions
- 532 x 297 x 90 mm
- Board weight
- 3.6 kg
- Box dimensions
- 580 x 450 x 155 mm
- Box weight
- 6.8 kg
- Recommended accessories
- Accessory set Type 4280.1, demodulation board Type 4281, transmitter board Type 4282, receiver board Type 4283 and manual V 0131
- Theoretical basics of modulation technology
- Addition and multiplication
- Amplitude modulation and AM-SSB
- Angle modulation methods FM and PM
- Digital modulation methods ASK, FSK and PSK
- Pulse modulation and the sampling theorem
- Pulse code modulation and PCM multiplexing
- Delta modulation
- Solution section and appendix
Taken from the tables of contents of the hps experiment manuals (titles, numbers and pages). All manuals are German; titles are shown in the original language. All manuals and experiments
V 0130 Modulationsverfahren – Modulatoren Manual · 267 pages 36 experiments
Main device of this manual – applies to all experiments View table of contents
- 1 Theoretische Grundlagen der Modulationstechnik p. 3
- 2.1 Der Addierer p. 9
- 2.2 Der Multiplizierer p. 25
- 3.1 Theoretische Einführung p. 33
- 3.2 Modulation an einer nichtlinearen Kennlinie p. 35
- 3.3 Amplitudenmodulation mit einem Multiplizierer p. 45
- 3.4 Spektrum und Bandbreite der AM p. 51
- 3.5 AM-ZSB mit unterdrücktem Träger p. 55
- 3.6 Der Multiplizierer im Gegentaktmodulatorbetrieb p. 57
- 3.7 Der Multiplizierer im Ringmodulatorbetrieb p. 61
- 3.8 Einseitenbandmodulation (ESB) p. 65
- 4.1 Theoretische Einführung p. 73
- 4.2 Erzeugung frequenzmodulierter Signale (FM) p. 75
- 4.3 Messung des Frequenzhubes p. 79
- 4.4 Ermittlung des Modualtionsindexes p. 81
- 4.5 Frequenzspektrum einer FM-Schwingung p. 85
- 4.6 Erzeugung phasenmodulierter Signale (PM) p. 91
- 4.7 Erzeugung pulsfrequenzmodulierter Signale (PFM) p. 101
- 4.8 Erzeugung pulsphasenmodulierter Signale (PPM) p. 105
- 5.1 Theoretische Einführung p. 107
- 5.2 Erzeugung amplitudengetasteter Signale (ASK) p. 115
- 5.3 Spektrum amplitudengetasteter Signale p. 119
- 5.4 Erzeugung frequenzgetasteter Signale (FSK) p. 129
- 5.5 Spektrum frequenzgetasteter Signale p. 131
- 5.6 Erzeugung phasengetasteter Signale (PSK) p. 134
- 5.7 Spektrum phasengetasteter Signale p. 137
- 6.1 Theoretische Einführung p. 143
- 6.2 Erzeugung eines pulsamplitudenmodulierten Signals p. 145
- 6.3 Frequenzspektrum des pulsamplitudenmodulierten Signals p. 151
- 6.4 Erklärung des Abtasttheorems p. 155
- 6.5 Zeitmultiplexverfahren p. 159
- 7.1 Theoretische Einführung p. 165
- 7.2 Versuche am Pulscodemodulator p. 169
- 7.3 PCM-Multiplexbildung p. 173
- 8.1 Theoretische Einführung p. 177
- 8.2 Erzeugung deltamodulierter Signale (DM) p. 179
No experiment matches the filter.
V 0131 Modulationsverfahren – Demodulatoren Manual · 231 pages 0 experiments
Additional device in this manual View table of contents
No experiment matches the filter.
V 0132 Übertragungsstrecken Manual · 96 pages 8 experiments
Additional device in this manual View table of contents
- 2.5 Übertragung von Wechselspannung p. 28
- 2.6 Übertragung von zwei analogen Signalen im Frequenzmultiplex-Betrieb p. 32
- 2.8 Übertragung pulsfrequenzmodulierter Signale p. 43
- 2.9 Übertragung eines PCM-Signals p. 43
- 3.2 Spektrale Empfindlichkeit des Infrarotempfängers p. 54
- 3.4 Abstrahlcharakteristik des Sendemoduls p. 58
- 3.5 Übertragung von Wechselspannung p. 62
- 3.6 Übertragung frequenzmodulierter Signale p. 64
Other sections mentioning this product (1)
No experiment matches the filter.
V 0134.1 Lichtwellenleitertechnik Manual · 125 pages 1 experiment
Mentioned in 1 experiment View table of contents
No experiment matches the filter.