I am currently trying to resolve an 07 error in an HP 8662A signal generator. Working on this unit there are power levels shown on the circuit diagrams for the various frequencies generated in the unit. When for example I look at the Service Sheet D? as a starting point the power levels quoted in table 8-218 are measured low when I look at the signal via an Advantest R3465 SA. On the list of test equipment for troubleshooting and calibrating the 8662A it lists an HP power meter and sensor. Also it is obvious that there are other signals at lower power levels detected by the SA take for instance the 10/20 MHz input to A6A4J1. When getting the 10 MHz signal there is a strong but lower magnitude signal at 20 MHz. But when the input is at 20 MHz there is almost nothing at 10 MHz. So my question is when measuring the power levels should I be using my HP 437 power meter to establish the signal level or are the power levels quoted purely for the signal at the frequency being measured. When there are multiple signals present my 437 will obviously read higher than the SA. Any help on this is appreciated.
John Proctor
VK2DLP
