Dear Sir:
I would like to set my 8593E spectrum analyzer (SA) center frequency at a fixed frequency. I do not want this frequency to change when I change the frequency SPAN settings. The internal automatic coupling operations, internal to the SA, auto sets the center frequency when I change the frequency SPAN settings.
Can anyone please show me a simple method to fix the center frequency and then make display monitor adjustments without altering the center frequency?
In order to explicitly answer this question, let me offer an example measurement requirement. Let's say I want to look at a signal at 2 GHz (center frequency = 2 GHz) and observe a display frequency span of 10KHz to 3.999990 GHz. Can you tell me the buttons which need to be pressed to accomplish this task?
Thank you for your time.
I would like to set my 8593E spectrum analyzer (SA) center frequency at a fixed frequency. I do not want this frequency to change when I change the frequency SPAN settings. The internal automatic coupling operations, internal to the SA, auto sets the center frequency when I change the frequency SPAN settings.
Can anyone please show me a simple method to fix the center frequency and then make display monitor adjustments without altering the center frequency?
In order to explicitly answer this question, let me offer an example measurement requirement. Let's say I want to look at a signal at 2 GHz (center frequency = 2 GHz) and observe a display frequency span of 10KHz to 3.999990 GHz. Can you tell me the buttons which need to be pressed to accomplish this task?
Thank you for your time.
In the setup example, you have the center frequency set to 2 GHz with essentially a 4 GHz span. The 8593E has a low band path that operates up to around 2.75 GHz. Frequencies above this point switch into the high band path. There is a physical mechanical switch that when biased properly will switch from low band to high band and vice versa. If the instrument firmware allowed a user to do a sweep from low band to high band, the user would hear that switch on every sweep. Therefore, the firmware has locked this capability out. I believe if the analyzer is in single sweep it would allow a user to use the setup you’re asking about. The attached ESA signal analyzer screen image shows the setup example that is desired. The ESA is able to do a multi-band continuous sweep because those products use an electronic or pin diode switch instead of a mechanical switch, which the 8593E utilizes that would wear out. The ESA also has a band cross or switch point at ~3 GHz as can be seen by the change in the noise floor. Even though the noise floor changes, the signal amplitude would measure accurately.
I believe the only way you can set up an 8593E with the settings desired is to use Single sweep. When a sweep is triggered by pressing the SGL SWP key, you will hear the switch at the band crossing.
Regards -