I don't know if gating is implemented, but HP/Agilent made/makes an FFT audio frequency analyzer. It has bandwidth to 100 kHz. It is really a scope with an FFT capability, and because of that speed is not limited by rbw.
> From: [email protected] > Reply-To: [email protected] > Date: Fri, 19 Mar 2004 14:11:06 -0500 > To: [email protected] > Subject: More on Gated Measurements > > > The gating function of the Agilent analyzers has a "set up" limitation, > i.e., a minimum setting of the RBW for a given width signal. This > limitation is due to the time required for the resolution-bandwidth filters > to fully charge before the gate comes on. The relationship is set up time > (SUT) > 2/RBW. > > For a 1.5 ms burst, > > SUT > 2/RBW, or RBW > 2/SUT > in this case, RBW > 2/1.5 ms; that is RBW >1300 Hz. > > To be able to see a signal 1 kHz away, I need to use a RBW < 300 Hz. Due to > the design of the RBW filters, this is not possible with an Agilent > analyzer. Does anyone know if any other brand of analyzer implement the RBW > filters differently so this is not an issue? > > Best regards, > > Don Umbdenstock > Sensormatic > > -----Original Message----- > From: [email protected] [mailto:[email protected]] > Sent: Thursday, March 18, 2004 6:21 PM > To: [email protected] > Subject: Gated measurements > > > > Does anyone know of equipment that can perform a gated measurement of a > burst of 50 kHz, 1.5 ms duration with a 50 Hz rep rate. > > The equipment that I currently have can perform gating with RBW greater than > 1 kHz. I need to use an RBW of 200-300 Hz to determine characteristics of > interest 1 kHz away from my 50 kHz signal. The setup time is not compatible > with the RBW. > > Have I bumped into the laws of physics or the design limitation of the piece > of equipment? I am currently working with an Agilent E7401A with gating > option 1D6. > > Any experiences related to gated measurements would be appreciated. > > Best regards, > > Don Umbdenstock > Sensormatic > > ------------------------------------------- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > Visit our web site at: http://www.ieee-pses.org/ > > To cancel your subscription, send mail to: > [email protected] > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Ron Pickard: [email protected] > Dave Heald: [email protected] > > For policy questions, send mail to: > Richard Nute: [email protected] > Jim Bacher: [email protected] > > All emc-pstc postings are archived and searchable on the web at: > http://www.ieeecommunities.org/emc-pstc > > ------------------------------------------- > This message is from the IEEE EMC Society Product Safety > Technical Committee emc-pstc discussion list. > > Visit our web site at: http://www.ieee-pses.org/ > > To cancel your subscription, send mail to: > [email protected] > with the single line: > unsubscribe emc-pstc > > For help, send mail to the list administrators: > Ron Pickard: [email protected] > Dave Heald: [email protected] > > For policy questions, send mail to: > Richard Nute: [email protected] > Jim Bacher: [email protected] > > All emc-pstc postings are archived and searchable on the web at: > http://www.ieeecommunities.org/emc-pstc > This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ieee-pses.org/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
