Triggering System; Table 3: Triggering System - Tektronix TPS2000B Series Service Manual

Specifications
Table 2: Time base system (cont.)
Characteristic
Position Range
Delta Time Measurement Accuracy
(Full Bandwidth)

Triggering System

Table 3: Triggering system

Characteristic
Holdoff Range
External Trigger Input Impedance
External Trigger Maximum Input
Voltage
External Trigger Maximum Float
Voltage
4
Description
2.5 ns/div to 10 ns/div: (-4 div× s/div) to 20 ms
25 ns/div to 100 ms/div: (-4 div × s/div) to 50 ms
250 μs/div to 10 s/div: (-4 div × s/div) to 50 s
25 s/div to 50 s/div: (-4 div× s/div) to 250 s
Conditions
Single-shot, sample mode
>16 averages
The limits apply for signals having amplitude > 5 divisions, slew rate at the measurement
points of > 2.0 divisions/ns, and acquired > 10 mV/Div.
Sample interval is the time between the samples in the waveform record.
Description
500 ns to 10 s
The ability to set large values of Holdoff is limited by the difficulty in adjusting the Holdoff
at Sec/Div settings less than 100 ms/div. This is because Holdoff cannot be set in Scan
Mode, which begins at 100 ms/div when Trigger Mode is AUTO. By adjusting Trigger Mode
to NORMAL, the Scan Mode operation is turned off, and Holdoff can be adjusted at larger
Sec/Div settings.
1 M ±2% in parallel with 20 pF ±3 pF
300 V CAT 1 and CAT II
RMS
150 V CAT III
RMS
At front panel connector, signal input to BNC shell, 300 V
100 kHz to 13 V peak AC at 3 MHz and above.
Based upon sinusoidal or DC input signal. For nonsinusoidal waveforms, peak value must be
less than 420 V. Excursion above 300 V should be less than 100 ms duration. RMS signal level
must be limited to 300 V. If these values are exceeded, damage to the instrument may result.
Input is rated 300 V CAT II, signal to floating common.
Rated 600 V CAT II.
Instrument chassis is normally considered to be at earth ground.
Between instrument chassis and BNC shell
TPS2000B Series Digital Storage Oscilloscopes Service Manual
Accuracy
±(1 sample interval + 100 ppm × |reading|
+ 0.6 ns)
±(1 sample interval + 100 ppm × |reading|
+ 0.4 ns)
; derate at 20 dB/decade above
RMS