2-21
IM DLM5058-03EN
Measurement Preparation
2
Logic Input Specifications When Used with the Instrument
The specifications of the 701988 and 701989 are as follows. For details, see page 6-3.
Item When using the 701988 When using the 701989
Maximum toggle frequency
1
100 MHz 250 MHz
Number of input bits 8
Maximum input voltage
2
±42 V (DC + ACpeak) or 29 Vrms ±40 V (DC + ACpeak) or 28 Vrms
Input range ±40 V ±6 V (around the threshold level)
Maximum sample rate
Real-time sampling mode: 1.25 GS/s
3
(1.25 GS/s). Values inside parentheses
are for high resolution mode.
4
Repetitive sampling mode: 250 GS/s
5
Interpolation sampling mode: 250 GS/s (pulse interpolation for logic waveforms)
Threshold level ±40 V (resolution: 0.05 V) ±6 V (resolution: 0.05 V)
Threshold accuracy
1
±(0.1 V + 3% of setting)
Minimum input voltage 500 mVp-p 300 mVp-p
Input impedance Approx. 1 MΩ, approx. 10 pF (Typical)
6
Approx. 100 kΩ, approx. 3 pF (Typical)
6
Preset threshold levels CMOS (5 V) = 2.50 V, CMOS (3.3 V) = 1.65 V, CMOS (2.5 V) = 1.25 V, CMOS
(1.8 V) = 0.90 V, ECL = ‒1.30 V
1 Under standard operating conditions (see section 6.12) after warm-up
2 For frequencies up to 1 kHz.
3 If high resolution mode is off and the sample rate of analog channels is 2.5 GS/s, interpolation (sampling)
mode is used.
4 Resolution only improves for analog waveforms.
5 Repetitive sampling is not possible when the trigger source is set to logic input.
6 Typical values represent typical or average values. They are not guaranteed.
2.6 Connecting Logic Probes
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