Tektronix 3 Series Hybrid Domain Oscilloscope

Tektronix 3 Series Hybrid Domain Oscilloscope

Core specification parameters (clarify instrument capability boundaries)

1. Model differences and overall architecture

The 3 series MDO oscilloscopes are divided into two categories: MDO32 (2-channel analog) and MDO34 (4-channel analog), with the same core architecture: "analog channel+digital channel (3-MSO option)+arbitrary function generator (3-AFG option)+spectrum analyzer" four in one, supporting synchronous observation of mixed domain signals (such as analog voltage+digital logic+RF signal).

Model Analog Channel Number Digital Channel Number (3-MSO) AFG Output (3-AFG) Spectrometer Channel Special Design

MDO32 2, 16, 1, 1 front panel with Aux In (external trigger)

MDO34 4 Road 16 Road 1 Road 1 Road No Aux In

2. Analog channel specifications (core measurement capability)

The analog channel is the foundation of an oscilloscope, and its parameters directly determine the voltage, bandwidth, and sampling accuracy. The document uses a large number of tables to clarify the differences between different bandwidth models (100MHz/200MHz/350MHz/500MHz/1GHz):

(1) Input and coupling characteristics

Input coupling: Supports AC and DC coupling, with a lower limit frequency of<10Hz (1M Ω) for AC coupling. When using a 10X probe, the lower limit is reduced by 10 times (<1Hz);

Input impedance: optional 1M Ω (± 1%, typical capacitance 13pF ± 2pF) or 50 Ω (± 1%), 1M Ω is suitable for high impedance signals (such as sensor output), and 50 Ω is suitable for RF/high-speed signals (matching transmission line impedance);

Maximum input voltage:

1M Ω DC coupling: 300VRMS (installation category II), derating at 20dB/decade for 4.5MHz-45MHz, derating at 14dB for 45MHz-450MHz, 5VRMS for>450MHz;

50 Ω: 5VRMS (peak value ≤± 20V, distortion factor DF ≤ 6.25%), although there is overvoltage protection, the pulse signal may damage the terminal resistance due to "detection delay".

(2) Bandwidth and sampling capability

Bandwidth: Bandwidth is strongly correlated with "vertical gear (V/div)", taking the 1GHz model as an example:

10mV/div-1V/div：DC-1.00GHz；

5mV/div-9.98mV/div：DC-500MHz；

2mV/div-4.98mV/div：DC-350MHz；

1mV/div-1.99mV/div：DC-150MHz。

Sampling rate:

1-2 channels enabled: up to 5GS/s (1GHz model), 2.5GS/s (≤ 500MHz model);

3-4 channels enabled: up to 2.5GS/s (all models);

The sampling rate varies with time/div, such as 2.5GS/s for 1ns/div and 100S/s for 1000s/div.

Record length: 1K-10M optional, with a maximum of 10M for 1 channel and 10M still supported for 4 channels, meeting the requirements for long-term signal acquisition (such as recording 2ms of signal at 10M point @ 5GS/s).

(3) Vertical accuracy index

DC gain accuracy:

1mV/div: ± 2.5%, with an additional 0.1% for every ℃ above 30 ℃;

2mV/div: ± 2.0%, with an additional 0.1% for every ℃ above 30 ℃;

5mV/div and above: ± 1.5%, with an additional 0.1% for every ℃ above 30 ℃.

DC balance: measures the signal offset at zero input, under 50 Ω DC coupling:

1mV/div：0.5div；

2mV/div：0.25div；

10mV/div and above: 0.2div;

When the temperature is above 40 ℃, an additional 0.01div is added for each ℃.

Noise level: Sampling mode, 50 Ω full bandwidth, 100mV/div gear:

1GHz model: 1.98mV (typical), 3.1mV (guaranteed);

100MHz model: 1.38mV (typical), 2.85mV (guaranteed).

3. Digital channel specifications (3-MSO option)

When configuring the 3-MSO option, the instrument supports 16 digital channels (D0-D15), suitable for synchronous observation of digital logic signals (such as FPGA, MCU pins):

Input characteristics: Input impedance 101k Ω (typical), input capacitance 8pF (typical), minimum signal 500mVpp, maximum signal+30V/-20V;

Timing accuracy: Skew (offset) between channels ≤ 500ps, minimum timing resolution of 2ns, minimum detectable pulse of 2.0ns (P6316 probe is required, and all 8 grounded channels are connected);

Threshold voltage: Range -15V -+25V, accuracy ± [130mV+3% x threshold setting] (SPC needs to be executed).

4. Arbitrary Function Generator (AFG, 3-AFG Options)

Built in 1 AFG, supporting 13 waveforms, can be used as a signal source to output excitation signals:

Waveform and Parameters:

Sine wave: frequency 0.1Hz-50MHz, amplitude 10mVpp-2.5Vpp (50 Ω), 20mVpp-5Vpp (1M Ω);

Square wave: frequency 0.1Hz-25MHz, duty cycle 10% -90%, minimum pulse width 10ns, rise/fall time 5ns (10% -90%);

Arbitrary wave: sampling rate of 250MS/s, recording length of 128k samples;

Accuracy index:

Frequency accuracy: ± 130ppm when ≤ 10kHz, ± 50ppm when>10kHz;

Amplitude accuracy: ± [1.5% x peak to peak value+1.5% x DC offset+1mV] (1kHz);

DC offset range: ± 1.25V (50 Ω), ± 2.5V (1M Ω), accuracy ± [1.5% x offset+1mV].

5. Specification of Spectrum Analyzer

Built in 1-channel spectrum analyzer, supporting RF signal analysis, standard frequency range 9kHz-1GHz, 3-SA3 option extended to 3GHz:

Frequency and bandwidth:

Resolution bandwidth (RBW): 20Hz-150MHz, adjusted in a 1-2-3-5 sequence, with Kaiser window ranging from 30Hz-150MHz;

Center frequency error: ± 10ppm (including aging, calibration, temperature stability, 1-year validity period);

Noise and distortion:

Display average noise level (DANL):<-136dBm/Hz at 5MHz-2GHz (guaranteed),<-140dBm/Hz (typical);