Specifications
1-14
CSA7404B, TDS7704B, TDS7404B, TDS7254B & TDS7154B Service Manual
Table 1- 3: Horizontal and acquisition system specifications (Cont.)
Characteristic Description
Update rate, maximum Fast Acquisition on: 400,000 waveforms per second
Fast Acquisition off: 60 waveforms per second
n Internal time-base reference frequency 10 MHz 2.5 ppm over any ≥100 ms interval. Aging <1 ppm per year
n Long term sample rate and delay time
accuracy
±2.5 ppm over any ≥100 ms interval. Aging <1 ppm per year
Aperture uncertainty, typical Short term:
≤2 ps rm s, records having duration ≤100 ms.
≤800 fs rms, records having duration ≤10 s
Long term:
≤15 parts per trillion rms, records having duration ≤1 minute
Time base delay time range 5nsto250s
n Delta time measurement accuracy For a single channel, with signal amplitude > 5 divisions, reference level set at 50%,
interpolation set to sin(x)/x, with risetime >1.4×T
s
and <4×T
s
or 150 ps (whichever
is greater) and acquired ≥10 mV/Div, where T
s
is the sample period. RMS
specification is typical.
Conditions Accuracy
Single shot signal, Sample acquisition
mode, Full bandwidth
± (0.06/sample rate +2.5 ppm ×
| reading | ) RMS
± (0.3/sampl e rate +2.5 ppm ×
| reading |) peak
Average acquisition mode, >100 aver-
ages, Full bandwidth
± (4 ps +2.5 ppm × | reading | ) peak
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