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PicoScope 4444 standard kit

PicoScope 4444 standard kit
PicoScope 4444 standard kit PicoScope 4444 standard kit PicoScope 4444 standard kit PicoScope 4444 standard kit
Produttore: Pico Technology
Codice Prodotto: PQ073
Disponibilità: In magazzino
Prezzo IVA esclusa: 1.395,00€
Qtà:  
   - O -   
PicoScope 4444 standard kit High-resolution differential oscilloscope with three PicoConnect 441 1:1 passive differential voltage probes and one TA271 single-ended D9-BNC adaptor
 
4 true differential inputs
Flexible 12- or 14-bit resolution
20 MHz bandwidth
Up to 400 MS/s sampling rate
256 MS capture memory
High common-mode rejection ratio
Balanced high-impedance inputs for a low circuit load
Intelligent probe interface
Measure differential signals with a single channel
Measure non-ground-referenced signals
Reject common-mode voltages in electronic and biomedical applications
Safely probe single and 3-phase voltages with 1000 V CAT III probes
Measure power drawn by mobile and IoT devices
 
The PicoScope 4444: a new standard in differential measurement
With four true differential inputs, 12- to 14-bit resolution and wide differential and common-mode voltage ranges, the PicoScope 4444 and its accessories offer accurate and detailed measurement for a multitude of applications.
The two key accessories are the new PicoConnectTM differential voltage probes. We have used 9-pin D-type connectors to create a true differential probe interface. These Pico D9 connectors also allow the PicoScope software to automatically identify the probe and select the appropriate display settings.
The TA271 and TA299 adaptors allow you to use the PicoScope 4444 with traditional BNC-connected accessories.
 
1:1 differential probes
With most oscilloscopes, just connecting to the signal of interest can be very frustrating when one of the connection points has to be grounded. With the PicoConnect 441 1:1 differential voltage probe, the PicoScope 4444 high-resolution differential oscilloscope allows the freedom to connect to and visualize signals that are off-limits to a grounded-input oscilloscope. Connect directly to current-sensing resistors and differential signals, or across non-grounded components in a signal path.
The PicoConnect 441 probe does not attenuate your signal and is well suited to numerous electronics applications, as well as biomedical and other scientific research, as it allows high-speed high-resolution measurements on signals between ±10 mV and ±50 V in the presence of common- mode voltages and noise.
 
 
Why make differential measurements?
While you can make a wide variety of measurements with an ordinary ground-referenced scope, there are some circumstances where that just won’t work.


 
Common-mode voltages are unwanted signals that are applied equally to both measurement terminals in your probing system. The circuit above consists of a signal source (purple) with AC and DC components producing a total output of VSIG, which we wish to measure. However, the circuit also contains an unwanted voltage source (green) that also has AC and DC components adding up to VCM, a common-mode voltage. This situation is quite common, for example when probing high-side drivers in amplifiers and power supplies.
As the diagram above shows, probing this circuit with a single-ended scope results in a distorted waveform (VSUM) on the display. We cannot simply connect the probe ground to the negative terminal of VSIG, as that would short-circuit VCM to ground through the oscilloscope, possibly causing a circuit malfunction or damage to the instrument. We need a measuring system that can safely detect VSIG and ignore VCM.
The solution, as shown below, is to connect a differential scope input across the positive and negative terminals of the signal source. The differential input does not measure VCM, only VSIG, so VSIG is what you see on the oscilloscope display.

 
Differential scopes can measure the AC or DC voltage between two points connected to the positive and negative leads, when neither of the points is grounded. This enables them to take measurements where single-ended scopes can’t, for example at voltages that are much higher than ground potential. The resulting measurements focus exclusively on the potential difference between the probes.
 
Why use the PicoScope 4444 differential oscilloscope?
There are, of course, plenty of differential probes available, all with similar inconveniences: bulky interface boxes, missing or flat batteries, snaking power leads... The PicoScope 4444 uses specially designed passive voltage probes that have smaller and lighter (or no) interface boxes. The PicoScope 4444 has high resolution and deep memory and lets you make multiple differential measurements at the same time, while never occupying more than one power socket. Its intelligent probe interface automatically configures the PicoScope display to your probes, so you don’t have to.
True differential measurements in high resolution
The PicoScope 4444’s four D9 inputs allow you to make true differential measurements. The maximum input range at full scale is ±50 V (±1000 V using the PicoConnect 442 1000 V CAT III probe), and the maximum common-mode range is also ±50 V (also ±1000 V with the PicoConnect 442 probe). You can set the scope to measure at resolutions of 12 or 14 bits, far better than the 8-bit resolution typical of many oscilloscopes. The deep capture memory (up to 256 million samples shared by the active channels) is another advantage, allowing you to carry out long captures without lowering the sampling rate.
The two images below show a sine wave with a sawtooth interference pattern, displayed on an 8-bit PicoScope 2208B (left) and a PicoScope 4444 in 12-bit mode (right). The PicoScope 2208B has greater bandwidth and a faster sampling rate than the PicoScope 4444, but fails to resolve the fine detail of the signal. The 12-bit resolution of the PicoScope 4444 offers 16 times as much vertical detail, and its deeper capture memory of 256 MS gives it greater horizontal resolution, too.



PicoConnect 441 probe: measure from millivolts to ±50 V


 
The PicoConnect 441 is a general-purpose passive differential probe with no attenuation and
20 MHz bandwidth, precisely measuring voltages on ranges from ±10 mV to ±50 V. The probe
is fitted with a ground reference clip, as well as the usual positive and negative leads, to eliminate unknown common mode voltage differences between the probe and the device under test (DUT). It uses unshrouded 4 mm banana leads, so is compatible with a wide range of test probes: it comes with a pair of sprung hook probes.
This probe is ideal for anyone needing to make lower-amplitude, precision measurements in a wide range of applications. You can also use it to measure the differential outputs of differential serial buses such as CAN or RS-485.

TA271 D9-BNC adaptor


 
The TA271 D9-BNC adaptor lets you use traditional differential voltage probes and current probes, and make single-ended measurements with a ground-referenced probe. It is also essential when using the TA325 and TA326 current probes.
Vertical
  Oscilloscope specifications Specifications with PicoConnect 442 1000 V CAT III probe
Input channels 4 channels 4 channels
Analog bandwidth (–3 dB) 20 MHz with D9 to BNC adaptors
15 MHz with PicoConnect 441 probe
10 MHz
Rise time (calculated) 17.5 ns with D9 to BNC adaptors
23 ns with PicoConnect 441 probe
35 ns
Bandwidth limit 100 kHz or 1 MHz (selectable) 100 kHz or 1 MHz (selectable)
Vertical resolution, 12-bit mode 12 bits on most input ranges
11 bits on ±10 mV range
12 bits
Vertical resolution, 14-bit mode 14 bits on most input ranges
13 bits on ±20 mV range
12 bits on ±10 mV range
14 bits
Enhanced vertical resolution
12-bit mode
16 bits on most input ranges
15 bits on ±10 mV range
16 bits
Enhanced vertical resolution
14-bit mode
18 bits on most input ranges
17 bits on ±20 mV range
16 bits on ±10 mV range
18 bits
Input type Differential
9-pin D-subminiature, female
Differential
9-pin D-subminiature, female
Input characteristics 1 MΩ ±1%, in parallel with 17.5 pF ±1 pF (each differential input to ground).
< 1 pF difference between ranges.
16.7 MΩ ±1%, in parallel with 9.3 pF ±1 pF (each differential input to ground)
Input coupling AC/DC AC/DC
Input sensitivity
(10 vertical divisions)
2 mV/div to 10 V/div ±0.5 V/div to ±200 V/div
Input ranges (full scale) ±10 mV, ±20 mV, ±50 mV, ±100 mV, ±200 mV, ±500 mV,
±1 V, ±2 V, ±5 V, ±10 V, ±20 V, ±50 V
±2.5 V, ±5 V, ±12.5 V, ±25 V, ±50 V, ±125 V, ±250 V, ±500 V, ±1000 V
Input common mode range ±5 V on ±10 mV to ±500 mV ranges
±50 V on ±1 V to ±50 V ranges
±125 V on ±2.5 V to ±12.5 V ranges
±1000 V on ±25 V to ±1000 V ranges
DC accuracy (10 kHz) ±1% of full scale ±500 µV ±3% of full scale ±12.5 mV
Analog offset range ±250 mV on ±10 mV to ±500 mV ranges
±2.5 V on ±1 V to ±5 V ranges
±25 V on ±10 V to ±50 V ranges

±6.25 V on ±2.5 V to ±12.5 V ranges
±62.5 V on ±25 V to ±125 V ranges
±625 V on ±250 V to ±1000 V ranges

Analog offset accuracy 1% of offset setting in addition to basic DC accuracy 1% of offset setting in addition to basic DC accuracy
Overvoltage protection ±100 V DC + AC peak (any differential input to ground)
±100 V DC + AC peak (between differential inputs)
CAT III 1000V
 
Horizontal
Maximum sampling rate (real-time)
12-bit mode
1 channel: 400 MS/s
2 channels: 200 MS/s
3 or 4 channels: 100 MS/s
Maximum sampling rate (real time)
14-bit mode
50 MS/s
Maximum sampling rate (USB streaming) 10 MS/s
Shortest real-time collection time, 12-bit mode

50 ns (5 ns/div)

Shortest real-time collection time, 14-bit mode

200 ns (20 ns/div)

Longest real-time collection time 50000 s (5000 s/div)
Capture memory (block mode) 256 MS shared between active channels
Capture memory (USB streaming mode) 100 MS (shared between active channels)
Waveform buffers 10000
Collection time accuracy ±50 ppm (5 ppm/year aging)
Sample jitter 3 ps RMS typical
ADC sampling Simultaneous sampling on all enabled channels
Dynamic performance (typical)
  Oscilloscope specifications Specifications with PicoConnect 442 1000 V CAT III probe
Crosstalk 2000:1 (DC to 20 MHz) 2000:1 (DC to 10 MHz)
Harmonic distortion at 100 kHz, 90% FSD < –70 dB on ±50 mV ranges and higher
< –60 dB on ±10 mV and ±20 mV ranges
< –70 dB
SFDR > 70 dB > 70 dB
ADC ENOB, 12-bit mode 10.8 bits 10.8 bits
ADC ENOB, 14-bit mode 11.8 bits 11.8 bits
Noise < 180 µV RMS on ±10 mV range < 5 mV RMS on ±2.5 V range
Bandwidth flatness (+0.1 dB, –3 dB) DC to full bandwidth (+0.1 dB, –3 dB) DC to full bandwidth
Common mode rejection ratio 60 dB typical, DC to 1 MHz 55 dB typical, DC to 1 MHz
Triggering
Source Any input channel
Trigger modes None, auto, repeat, single, rapid
Advanced triggers Edge, window, pulse width, window pulse width, dropout, window dropout, interval, runt, logic
Trigger sensitivity Digital triggering provides up to 1 LSB accuracy up to full bandwidth
Maximum pre-trigger Up to 100% of capture size
Trigger time-delay range Up to 4 billion samples
Trigger rearm time in rapid trigger mode < 2 µs on fastest timebase
Max. waveforms in rapid trigger mode 10000 waveforms in a 12 ms burst
Probe compensation pins
Output level 4 V peak
Output impedance 610 Ω
Output waveforms Square wave
Output frequency 1 kHz
Overvoltage protection ±10 V


see full specs on the data sheet view/download PDF data sheet

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