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equipment:sig-gens [2015/11/21 11:30]
tggzzz created
equipment:sig-gens [2019/05/12 23:12]
felix.h ↷ Page moved from sig-gens to equipment:sig-gens
Line 1: Line 1:
 ===== Signal Generators ===== ===== Signal Generators =====
  
-There are several simple sine/triangle/square wave signal generators, with adjustible peak-to-peak voltage and voltage offset. Frequency range is up to a couple of MHz, but at those frequencies the waveform is less than perfect. Their main use is for audio frequencies circuits and mechantronic circuits.+==== Simple Audio ==== 
 +There are several simple sine/triangle/square wave signal generators, with adjustible peak-to-peak voltage and voltage offset and duty cycle / symmetry. Their main use is for audio frequencies circuits and mechantronic circuits. 
  
-These are all based around the classic ICL8038, which is effectively a 555 timer with some wave shaping. Consequently the sine waves are noticably distorted at the peaks, and they are unsuitable for serious audiophile purposes.+Frequency range is up to a couple of %%MHz%%, but at those frequencies the waveform is less than perfect. With most, the front panel controls give a vague indication of the operating frequency, but if accuracy is required then measure it with a scope or the [[frequency-counters|frequency counter]]. The Levell contains its own internal frequency meter. 
 + 
 +The sig gens are all based around the classic ICL8038, which is effectively a 555 timer with some wave shaping. Consequently the sine waves are noticably distorted at the peaks, and they are unsuitable for serious audiophile purposes. 
 + 
 +{{test_equipment:siggen8038.jpg?direct&200}} {{test_equipment:siggen-levell.jpg?direct&200}} {{test_equipment:siggen-peakSpike.jpg?direct&200}} 
 + 
 + 
 + 
 +==== TV Pattern Generator / RF ==== 
 + 
 +We have a PAL/NTSC TV pattern generator with outputs: 
 +  * SCART 
 +  * composite video 
 +  * RF, carrier frequency from 38-890MHz, which covers the IF, VHF and UHF bands. Can set channel or frequency 
 + 
 +It is unlikely that those "obsolete" TV signals will be useful, so the main use of the device is likely to be: 
 +  * a "complex" waveform useful when learning how to use an oscilloscope 
 +  * an RF signal generator, albeit only a modulated signal not a sine wave 
 +  * when testing an old TV or monitor 
 + 
 +{{test_equipment:siggen-tvPattern.jpg?direct&200}}
  • equipment/sig-gens
  • Last modified: 22 months ago
  • by tggzzz