House de Kris
04-14-2006, 11:30 AM
Recently an AK member (DKak) sent me a few digital audio cables to measure. This time I grabbed a 1.5 foot Canare LV-61S cable with BNC/BNC terminations. I have no idea about the cost of this cable, or the claims made by the manufacturer, or if it was even homemade. Attached are a couple pictures of the network analyzer measurements. The cable came supplied with a directional arrow on it, and I respected this for the measurement.
RESULTS
Two pictures are presented, first one with raw data, then followed by a smoothed picture. The center screen reference is at -3dB with 3dB/div. Marker (1) is at the -3dB point, marker (3) was going to be set to the -10dB point, but there isn't that much loss even at the top frequency that I chose to use which is 15GHz. Marker (2) was just randomly placed at 11GHz for no good reason. In the future I will make it a point to put markers at the -1dB, -3dB, and -10dB points since these are common loss points when considering bandwidth. If we define bandwidth as the -3dB point, then this is easily a 7.5GHz cable.
This is the first DKak cable I've measured with the network analyzer, and it is a screamer. He's got some other cables on loan to me that appear, from the external construction details, to be able to beat this cable. Can't wait to get around to measuring them. My TDRs are still being fixed, when they are returned, I will add time domain measurements to these frequency domain measurements.
More to come later.
RESULTS
Two pictures are presented, first one with raw data, then followed by a smoothed picture. The center screen reference is at -3dB with 3dB/div. Marker (1) is at the -3dB point, marker (3) was going to be set to the -10dB point, but there isn't that much loss even at the top frequency that I chose to use which is 15GHz. Marker (2) was just randomly placed at 11GHz for no good reason. In the future I will make it a point to put markers at the -1dB, -3dB, and -10dB points since these are common loss points when considering bandwidth. If we define bandwidth as the -3dB point, then this is easily a 7.5GHz cable.
This is the first DKak cable I've measured with the network analyzer, and it is a screamer. He's got some other cables on loan to me that appear, from the external construction details, to be able to beat this cable. Can't wait to get around to measuring them. My TDRs are still being fixed, when they are returned, I will add time domain measurements to these frequency domain measurements.
More to come later.