Kenwood TS-590SG Manual

Also see for TS-590SG: Reference guide Setting manual Setting manual Instruction manual Instruction manual

Contents

RECEPTION 019Figure 1-6 shows the measurements for the third-order dynamic range characteristics of TS-590SG with the distance fromthe interfering signal altered. As a comparison, the results for an existing model, TS-480HX/SAT (up-conversion, 500 MHz,built-in CW filter), are displayed side by side with the readings for TS-590S (*extracted from the QST magazine 2011 Mayissue of product review; reprinted with permission of ARRL).The third-order dynamic range characteristics of the TS-590SG are almost flat up to 2 kHz. The intercept point calculatedfrom these readings is +33 dBm.Measurement Conditions:ReceiveFrequency 14.200 MHzMode CWPass bandwidth 500 HzPRE AMP OFFThe abscissa axis shows the distance from the interfering signal. For example, it represents that at the point of 10 kHz thereceive frequency is 14.200 MHz and two interfering signals of 14.210 MHz and 14.220 MHz are given.The orange line indicates the result of TS-590SG; the mark indicates the result of TS-590S; and the gray line indicatesthe result of TS-480HX/SAT.The dynamic range of all the products exceeds 105 dB with an interfering signal separation of more than 20 kHz. However,as the interfering signal approaches the receive signal, the dynamic range of the up-conversion type TS-480HX/SAT, whichdoes not make use of a roofing filter with a narrow bandwidth, becomes smaller. This is attributable to the deterioration inthe attenuation of the interfering signal due to the wide passband width of the roofing filter.Meanwhile, difference is observed between the TS-590SG and TS-590S particularly when it is close to the receive signalat 2 kHz. This is due to influence from the NB filter immediately after the first mixer. On the TS-590SG, the signal passesthrough the NB filter when the NB is OFF, enabling the full performance of the roofing filter.Note: Measurements of the receive frequency and adjacent bands◆ A different measurement method was adopted, which accounts for the different results between the data of the TS-590Spublished in the catalog and in-depth manual and the ARRL measurements. During measurement of the published datafor the TS-590SG, the same method adopted by ARRL is used for measuring the third-order dynamic range to preventdifferences from arising as a result of the measurement method Figure 1-6 shows the measurements for the TS-590SGbased on random sampling of the mass-produced items. (Data used in the catalog is obtained based on the prototype.) Theoutcome is an example, and does not warrant the performance of the product.