Tektronix 2445, Instruction Manual

Page: 18 / 351

Specification—2445 Service
Table 1-1 (cont)
Characteristics
Performance Requirements
HORIZONTAL DEFLECTION SYSTEM (cont)
Timing Accuracy (A SEC/DIV switch set to 1 s per
division)
Add ±2% of time interval to all accuracy specifications.
Timing Accuracy (SEC/DIV VAR control out of
detent)
Add 2% o f time interval to the A and B Sweep Accuracy
specification.
Timing Accuracy (—15°C to +15°C and +35°C
to +55°C)
Add ±0.2% o f time interval to all A t and delay specifications. Add
±0.5% o f time interval to A and B Sweep accuracy specifications.3
A t Readout Resolution Greater o f either 20 ps or 0.025% o f fu ll scale.8
A t Range ± 10 times the A SEC/DIV switch setting.8
Delay Pickoff Jitter
Within 0.004% (one part or less in 25,000) o f the maximum
available delay, plus 100 ps.
Delay Time Position Range 0 to 9.95 times the A SEC/DIV switch setting. Main sweep triggering
event is observable on delayed sweep w ith zero delay setting.3
X-Y Operation
X-Axis Deflection Factor
Range Same as Channel 1 8
Accuracy Same as Channel 1.
Variable Range Same as Channel I . 8
X-Axis Bandwidth
Dc to 3 MHz.
Input R and C Same as Channel I . 8
Phase Difference Between X and Y w ith Normal
Bandwidth 1° or less from dc to 1 MHz;
3° or less from 1 MHz to 2 MHz.
X-Axis Low-Frequency Linearity
0.2 division or less compression or expansion o f a two-division,
center-screen signal when positioned w ithin the display area.
CURSOR AND FRONT-PANEL DISPLAY
Cursor Position Range
Delta Volts (AV)
A t least the center 7.6 vertical divisions.
Delta Time (At)
A t Iscist
lm
6 center 9.8 horizontal divisions.
Minimum Setup Time Required to Maintain
Front-panel Settings at Power-down 10 seconds or less.8
1-7
“Performance Requirement not checked in manual.