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Instek GDS-840C
250 Mhz Digital Oscilloscope
Front View
Rear View
Click images to enlarge
Model pictured is GDS-820C w/GPIB
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Features:
- 150MHz/250MHz Bandwidth with either Color or Monochrome LCD Display
- 125k Long Memory and 12 Division Horizontal Display
- 25Gsa/s Sampling Rate for Repetitive Waveforms
- Advance Trigger: Pulse Width, TV-Line, Event Delay and Time Delay
- GO-No Go, Learn Mode and Auto Setup Sequence
- FFT Function
- Built-in Help Menu, Multi-Language and PC Software
- 3 Year Warranty
- NIST Certification
GRA-405
Rack Mount, 19",4U
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GRA-405
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GRA-405
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GSC-005
Soft Carrying Case
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GTP-150A
10:1 DC - 150MHz
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Description
New Bench-Mark of Mainstream DSO
GDS-820/GDS-840 series DSO, at 150MHz/ 250MHz bandwidth with color or Mono LCD display, are designed and built to meet the demands of a modern DSO in the main stream market today. The unmatched performance, user-friendly design and versatile interface make GDS-820/840 a very useful equipment for most of the applications in various fields.
Superior DSO Performance
With Equivalent Time Sampling Technique, GDS-820/840 series perform up to 25G S/s sampling capability and provide high resolution of 40ps for repetitive waveforms. Comparing with 1GS/s and 2GS/s sampling DSOs, GDS-820/840 gives higher or equal sampling rate and longer record length of a transient signal at the same time-base because of its 125K long memory. Furthermore, this series offer an alternative to view the signal with 12 horizontal divisions, which matches long memory applications! GDS-820/840 advanced trigger functions, such as Pulse Width, TV Line, Event-Delay, and Time-Delay, offer a very strong trigger capability that could only be found in a high-end DSO!
Valued Plus Features The FFT function converts a captured waveform from time domain into frequency domain. The Go-No Go function gives an instant view of the performance of a DUT or provides an easy way to baby-sit the abnormal event of a signal. The Learn Mode and Auto Setup Sequence function let the user complete his ATE test procedures without software programming. With almost everything you could expect from a DSO, GDS-820/840 provides you with the best solution for waveform measurements at a surprisingly affordable price.
User-friendly Design
The straightforward operation of GDS-820/840 lets the user get started with DSO measurements right after the power-on! The Auto-Set function enables the DSO to automatically adjust the set-up and display the waveform in a proper way! The on-screen Help Manu tells you the operation information you need. Besides, 15 auto measurement functions of GDS-820/840 give you direct readouts of most of the frequently measured parameters!
Versatile Interface GDS-820/840 series (except GDS-820) provide various kinds of interface including USB, RS-232 and Printer Port as standard, and GPIB as optional. With USB and software, you can quickly send the signal from DSO to PC within a very short time. This enables the nearly synchronous waveform displays on both the DSO and the PC screen.
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Models, Options, & Accessories
| Model |
Description |
List Price |
Sale Price |
| GDS-820 |
150MHz, digitizing - Discontinued - replaced by Instek GDS-820C |
| GDS-820C |
Digital Osilloscope - 150MHz, 100MS/s with RS-232, color display |
$1295.00 |
| $1074.85 |  |
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| GDS-820CGP |
Digital Oscilloscope, 150MHz, 100MS/s with RS-232, color display, with GPIB |
$1535.00 |
| $1274.05 | |
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| GDS-820S |
Digital Osilloscope - 150MHz, 100MS/s with RS-232,USB,Printer Port,Go/No Go output - Discontinued - replaced by Instek GDS-820C |
| GDS-820SGP |
Digital Oscilloscope, 150MHz, 100MS/s with RS-232, monochrome display, with GPIB |
$1335.00 |
| $1108.05 | |
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| GDS-840C |
Digital Osilloscope - 250MHz, 100MS/s with RS-232, color display |
$1895.00 |
| $1572.85 | |
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| GDS-840CGP |
Digital Oscilloscope, 250MHz, 100MS/s with RS-232, color display, with GPIB |
$2135.00 |
| $1772.05 | |
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| GDS-840S |
Digital Osilloscope - 250MHz, 100MS/s with RS-232,USB,Printer Port,Go/No Go output |
$1895.00 |
| $1705.50 | |
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| GDS-840SGP |
Digital Oscilloscope, 250MHz, 100MS/s with RS-232, monochrome display, with GPIB |
$1835.00 |
| $1523.05 | |
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| Model |
Accessories |
List Price |
Sale Price |
| GRA-405 |
Rack Mount for GDS-820/840/2000 Series |
$250.00 |
| $225.00 | |
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| GSC-005 |
Carrying Case for GDS-800/2000 Series |
$90.00 |
| $81.00 | |
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Click here to download the Instek GDS-800 series manual (PDF)
Click here to download the Instek GDS-800 series programming guide (PDF)
Screenshots
Click images to enlarge
| 25GS/s ET Sampling Rate and 125k Memory |
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| The encoded signal from a car-door remote controller |
The same signal is acquired at 2500 points record length only |
The same signal is acquired at a total 125000 points record length |
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| 12 Division Horizontal Display |
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The conventional 10 division horizontal display |
The extra 12 division horizontal display |
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| 15 Auto Measurements and Simultaneous ΔT/ΔV Cursors |
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Displaying 10 Auto-Measurement data simultaneously |
Operating vertical and horizontal cursor measurements simultaneously |
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| Advanced Trigger Functions |
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Pulse width trigger |
Video signal trigger |
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| FFT Function |
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FFT Function for AM signal |
FFT Function for Square Waveform signals |
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| Frequency Adjustable Probe Calibration Signal |
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| Frequency at 1kHz, Duty Cycle at 50% |
Frequency at 1kHz, Duty Cycle at 30% (for GDS-806/810 series only) |
Frequency at 1kHz, Duty Cycle at 80% (for GDS-806/810 series only) |
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| Go / NoGo Mode |
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| Video Signal Waveform |
Go Waveform |
NoGo Waveform |
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| Multi-Language |
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| Multi-Language |
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Specifications
| Model |
GDS-820 |
GDS-820S |
GDS-820C |
GDS-840S |
GDS-840C |
| Display System |
| Display Device |
Mono (320*240) 5.7" LCD |
Mono (320*240) 5.7" LCD |
Color (320*240) 5.7" LCD |
Mono (320*240) 5.7" LCD |
Color (320*240) 5.7" LCD |
| Display Contrast |
Adjustable |
| Waveform Display Graticule |
8 x 10 division |
| Display Mode |
Dot, Vector, Accumulate |
| Vertical System |
| Bandwidth |
DC~150MHz |
DC~250MHz |
| Channels |
2 |
| Resolution |
8-Bit |
| Sensitivity |
2mV/div to 5V/div |
| Accuracy |
±3? |
| Rise Time |
<2.3ns |
<1.4ns |
| Input Coupling |
AC, DC & Ground |
| Input Impedance |
1MΩ ±2Ω, ~22pF |
| Polarity |
Normal & Invert |
| Maximum Voltage Between Signal and Common at input BNC |
300V (DC+AC peak), CATII |
| Waveform Signal Process |
CH1-CH2, CH1+CH2, FFT |
| Offset Range |
2mV/div ~ 50mV/div: ±0.5V ; 100mV/div ~ 500mV/div: ±5V ; 1V/div ~ 5V/div: ±50V |
| Bandwidth Limit |
20MHz (-3dB) |
| Horizontal System |
| Range |
1ns/div ~ 10s/div (1-2-5 increments) |
| Modes |
MAIN, WINDOW, WINDOW ZOOM, ROLL, X-Y |
| Accuracy |
±0.01? |
| Delay Range |
Pre-trigger: 10 div maximum ; Post-trigger: 500 div |
| Signal Acquisition System |
| Real-time Sample Rate |
100MSa/s maximum on each channel |
| Equivalent Sample Rate |
25GSa/s maximum on each channel |
| Record Length |
125k/CH |
| Peak Detection |
10ns (10μs/div ~ 5s/div) |
| Acquisition Mode |
Sample, Peak Detect, Average |
| Average |
2, 4, 8, 16, 32, 64, 128, 256 |
| Trigger System |
| Sources |
CH1, CH2, LINE, EXT. |
| Modes |
Auto-Level,AUTO,NORMAL,SINGLE,TV,Time-delay,Event-delay |
| Coupling |
AC, DC, LF Reject, HF Reject, Noise Reject |
| Sensitivity |
DC ~ 25MHz: Approx. 0.35div or 3.5mV
25MHz ~ 100MH : Approx. 1.5div or 10mV |
DC ~ 25MHz: Approx. 0.35div or 3.5mV |
| 25MHz ~ 250MHz |
Approx. 1.5div or 10mV |
| External Trigger |
| Range |
±15V |
| Sensitivity |
DC ~ 30MHz: ~ 50mV
30MHz ~ 100MHz: ~ 100mV |
DC ~ 30MHz: ~ 50mV
30MHz ~ 100MHz: ~ 100mV
150MHz ~ 250MHz: ~ 150mV |
| Input Impedance |
1MΩ ±2Ω, ~ 22pF |
| Maximum Input |
300V (DC+AC peak), CATII |
| X-Y Mode |
| X-Axis Input / Y-Axis Input |
Channel 1 / Channel 2 |
| Phase shift |
±3°at 100kHz |
| Cursors and Measurement |
| Automated Voltage Measurement |
Vpp,Vamp,Vavg,Vrms,Vhi,Vlo,Vmax,Vmin |
| Automated Time Measurement |
Freq, Period, Rise Time, Fall Time, Positive Width, Negative Width, Duty Cycle |
| Cursors Measurement |
Voltage difference between cursors (?V)
Time difference between cursors (?T)
Frequency difference between cursors (1/?T) |
| Frequency Counter |
| Readout Resolution |
6 digits |
| Accuracy |
±50ppm |
| Range |
AC Coupled, 10Hz minimum to rated bandwidth |
| Signal Source |
All available trigger source except the Pulse Width & Video Trigger mode |
| Control Panel Functions |
| Autoset |
"Autoset" can adjust Vertical, Horizontal and Trigger level automatically |
| Save/Recall |
Up to 15 sets of measurement conditions can be saved and recalled |
| Waveform Trace Save/Recall |
2 sets of waveform can be saved and recalled |
| Interface |
| RS-232 Interface |
N/A |
Standard |
| GPIB Interface |
N/A |
Option |
| Printer Port |
N/A |
Standard |
| USB Port |
N/A |
Standard |
| Misc |
| Power Source |
100V ~ 240V AC 48Hz ~ 63Hz, auto selection |
| Accessories |
Instruction manual x 1, Power cord x 1, Probe x 2 |
| Dimensions & Weight |
254D×142H×310W (mm), Approx. 4.1kg |
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