YOKOGAWA DLM2000 Series, Руководство по эксплуатации

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2-20
IM 710105-03E
Logic Signal Input Ports
Connect the logic probe (701980/701981/701988/701989) to the logic signal input port.
M Ω
4 3 LOGIC 2 1
1 / 20 pF 150 Vrms 50 Ω 5 Vrms, 10 Vpk
Logic signal input port
About the Logic Probe
The logic probe (701980/701981/701988/701989) is designed exclusively for the logic
signal input ports of the DLM2000. Use the connection lead (accessory) to connect to the
point of measurement. Do not alter the connection lead, as it may cause the lead from
satisfying the specifications.
Each port has 8 lines of logic input terminals. You can set the threshold level from the
DLM2000 menu.
Recommended probes: 701988/701989 (can be connected even when the DLM2000 is
turned on)
Compatible probes: 701980/701981 (can be connected when the DLM2000 is turned off)
Logic Input Specifications When Used on the DLM2000
Item When using the 701989 When using the 701988
Maximum toggle
frequency 1
250 MHz 100 MHz
Number of inputs 8
Maximum input voltage
2
±40 V (DC + ACpeak) or 28 Vrms ±42 V (DC + ACpeak) or 29 Vrms
Input range ±6 V ±40 V
Maximum sample rate
1.25 GS/s (interleave mode OFF)
Threshold level ±6 V (resolution: 0.05 V) ±40 V (resolution: 0.05 V)
Threshold accuracy
1
± (100 mV + 3% of setting)
Minimum input voltage
1
300 mVp-p 500 mVp-p
Input impedance Approx. 100 kΩ, approx. 3 pF
(Typical)
3
Approx. 1 MΩ, approx. 10 pF
(Typical)
3
Preset threshold levels CMOS (5 V) = 2.5 V, CMOS (3.3 V) = 1.65 V, CMOS (2.5 V) = 1.25 V,
CMOS (1.8 V) = 0.9 V, and ECL = –1.3 V
1 Under standard operating conditions (see section 5.11) after warm-up.
2 For frequencies up to 1 kHz.
3 Typical values are typical or mean values. They are not strictly guaranteed.
2.6 Connecting Logic Probes