Test & Measuring Equipment Part 12: Signal Generators (6)

58 TEST & MEASURING EQUIPMENT EE Decembe 19 8 Thandar TG502 The Thandar TG502 represents an in- termediate step between the low-cost 2 MHz signal sources and the vastly more expensive synthesized generators that start at around £1500. The price of the TG502 is £495. The TG502 is one of a family of three: the TG501 is a basic model, priced at £325, while the TG503 priced at £545, provides pulse generator as well as all the other facilities of the TG502. The TG502 is connected to the mains by a standard IEC socket. The mains voltage may be 100-120-220-240 V: selec- tion is by means of interchangeable taps on the mains transformer. Main generator. The continuously vari- able output frequency is read from a lin- ear/logarithmic scale that covers a range of 1000:1 and 10,000:1 respectively. The frequency range is specified as 5 mHz to 5 MHz, although the review model ex- tended up to 6.3 MHz. The accuracy of the vernier control is fairly good, except at the mid-point of the scale w...