•DC Power Supply
•RF Signal Generator
•RF Test Accessory
•AC Power Source
•AC Power Analyzer
•TV and Video
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The ADA400A Differential Preamplifier allows direct oscilloscope measurements of very low amplitude voltages and signals which are not ground referenced. The high impedance of both inputs eliminates the need to add additional ground points in the DUT, thereby avoiding circulating currents which disturb the measurement or the circuit.
The high gain and extremely high common mode rejection provide usable measurements of voltages as low as 5 µV, even in high noise environments. Selectable bandwidth limiting reduces normal mode noise from digital logic, switch mode power supplies and line frequency sources. Adjustable differential offset allows the user to null out transducer bridge bias and galvanic potential from the test setup. An "infinite impedance" mode can be selected in the two highest gain ranges allowing accurate measurements of signals with high source impedance.
The ADA400A is powered directly from TDS400, TDS500, TDS600, TDS700, TDS5000, TDS7000 (TekProbe), TDS7000 (TekConnect w/TCA-1Meg) oscilloscopes. It may also be powered by a 1103 Probe Power Supply.
Includes: 070-9164-00 Instruction Manual, 159-0024-00 Spare Input Fuses (2).
Gain: X100, X10, X1, X0.1
CMRR: >/=100,000:1 DC - 10 kHz
Bandwidth Limits: 100 Hz, 3 kHz, 100 kHz, Full (>/=1 MHz)
Input Impedance: 1 MΩ in parallel with approx. 50 pF (infinity Ω selectable in 100X and 10X gains)
Noise: Typically = 30 µV RMS @ X100 Gain (Referred to Input)
|Gain||CM Range||Differential Range*||MAX Offset|
|100||±10 V||0.1 V||±1.0 V|
|10||±10 V||1 V||±1.0 V|
|1||±40 V||10 V||±40 V|
|0.1||±40 V||80 V||±40 V|
|* For higher voltages, attenuating probes may be used, but CMRR performance will be degraded.|
Tektronix ADA400A High-Gain Differential Preamplifier
100X, 10X, 1X, 0.1X. MSO/DPO2000 Series requires TekVPI external power adapter (119-7465-01); one per oscilloscope.
|TEVET Price $1,880|
1103 TekProbe Power Supply
(For non-TekProbe BNC scopes)
|TEVET Price $2,280|
SILV200 Silver Care 200
Five years extended warranty coverage
|TEVET Price $260|