In addition to scrutinizing a spec sheet, it helps to turn the knobs and push the buttons on a piece of test gear to get a feel for what it can, and cannot, do. That's exactly what I had an opportunity to do with one of Agilent's new 6000 Series scopes. These are the newest additions to the existing 6000 line-up, which we introduced last February here at eeProductCenter. The table shows where the new 100-MHz scopes fit in.
Note that Agilent's competitor Tektronix also offers 100-MHz scopes, namely its TDS3012 and TDS3014Bs. These have 1.25-Gsample/s sample rates, as opposed to the 6000's 2-Gsample/s rate.
They're also limited to a 10-kpoint memory depth, and have only two or four analog channels, with no digital logic inputs. The Tek scopes update at 2600 waveforms/s. As such, it's likely that Tektronix will be compelled to roll out some new products in the near future to compete with Agilent's latest wares.
First Impressions
At the behest of Johnnie Hancock, Agilent's program manager at the company's Electronics Products and Solutions group, I recently drove one of these new instruments. I got my first impression from the front-panel.
For the 6000s, it's clean and relatively easy to decipher and useand the display is striking. The 6000 Series provide 3-D viewing, using a high definition XGA color LCD. It gives you a crisp 768 x 1024 screen area, for a 640 vertical-point x 1000 horizontal-point waveform view.
The TFT (thin film transistor) 6.3-in. LCD provides 256 intensity levels, too, something no other competing oscilloscope presently has. "It's superior to good old analog scope technology," avows Hancock. "There's even an Intensity control knob that lets you control trace detail."
Could this be the ultimate mixed-signal 100-MHz scope? With 16 logic timing channels that handle TTL, CMOS, and ECL, these new 6000 Series scopes, with either two or four analog channels, don't compromise very much.
For starters, they provide reliable triggering across all channels. And, without any special modes, you get a 100,000-waveform/s update rate. Scope vertical resolution is 8 bits, and horizontal timing resolution is within 2.5-ps. The logic channels accept signals to 250-MHz.
With the fast update, you get to see instant responses on-screen, with the ability to visually see things such as jitter, noise, and even infrequent glitches and spurious signals. As Agilent points out, this realtime update rate is more than 27 times faster than that of a typical digital scope in this class.
These scopes have very low dead times between acquisitions, too. If a glitch occurs during a scope's dead time, you'll miss it. By minimizing dead time, you improve the probability of the glitch occurring during acquisition time. With a 100,000 waveform/s update rate, it's unlikely that you'll miss a narrow transient, or a glitch, or distorted edge.

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The 6000 scopes also use analog comparator trigger circuits to eliminate trigger jitter (diagram above), and offer time-qualified pattern triggering.
Deep Memory
As infinite persistence storage scopes, these capabilities are backed by a Megapoint of memory (upgradeable to 2-Mpoints or even 8-Mpoints). Even with just 1-Mpoint of memory, you can capture long non-repeating signals and maintain high sample rates. That lets you rapidly zoom in on a signal's areas of interest.
With the as-supplied standard memory configuration, with the oscilloscope channels turned off, you get 1-Mpoint for one logic analyzer pod, and 500-kpoints for each pod. With the scope channels turned on, you get 312-kpoints for one pod, and 56-kpoints for each pod.
By the way, you can expand the capabilities of any Series 6000 scope at any time. You can upgrade to include 16 timing channel capabilities or choose a memory upgrade. The memory hardware is already in the scope; all you need do is buy the upgrade and turn it on.
Analog And Digital Triggering
You also get a panoply of triggering choices as standard features. Triggering across all four scope channels and 16 logic channels, you can also select a number of serial triggers using a straightforward process to set up serial bus triggers to sift through frames.
Instead of using edge triggering to capture and trace serial data, the scope's serial bus triggering scheme automatically finds the right pattern in long streams of bits. Built-in serial triggering supports LIN (Local Interconnect Network), IsC, USB (Universal Serial Bus), CAN (Control area network), and SPI (Serial Peripheral Interface) triggers.
You also get a variety of dedicated analog TV triggers for capturing baseband HDTV/EDTV signals. The scopes support emerging standards such as 1080i, 1080p, 720p, and 480p as well as standard video triggering. You can trigger on lines within a field, all lines, all fields, and odd or even fields. The system supports NTSC, SECAM, PAL, and PAL-M video.
Connectivity Hooks
The scopes also include, as standard features, a range of connectivity hooks. USB 2.0 is standard, as is IEEE-488.2/GPIB (general Purpose Interface Bus) and 10Base-T/100-Base-T Ethernet. There's even an XGA video output jack. The scopes also feature auto-scaling, probe/channel de-skew capabilities, and trigger hold-off functions.
It's worth noting that some users assume mixed-signal scopes are limited to 8-bit applications. As Hancock emphasizes, that's not typically the case, as most mixed-signal instruments are primarily used to monitor analog and digital I/O around controllers or DSPs, not system buses.
The internal buses of these chips aren't accessible, so evaluating a scope on the number of bits of processing in an internal bus-based design isn't really irrelevant.
Sixteen channels of digital acquisition, along with two to four channels of analog acquisition and triggering, is usually more than enough to monitor and verify the functions of 8-bit and 16-bit controller systems, and even some 32-bit designs. If those types of controller-centric designs are what you’re working on, be sure to take a closer look at these new 100-MHz additions to Agilent’s 6000 Family.
Click here for a datasheet (in Adobe Acrobat .PDF format).
For more info, contact Agilent Technologies Inc., 395 Page Mill Rd., Palo Alto, Calif. 94303. Phone: 800-829-4444. Fax: (650) 752-5300.
Agilent Technologies, (650) 752-5000, www.agilent.com