Tektronix 2445, Instruction Manual

Page: 19 / 351

Specification—2445 Service
Table 1-1 (cont)
Characteristics
Performance Requirements
Z-AXIS INPUT
Sensitivity
Dc to 2 MHz
Positive voltage decreases intensity; +2 V blanks a maximum-
intensity trace.
2 MHz to 20 MHz +2 V modulates a normal-intensity trace.3
Input Resistance 9 k£2 ±10%.a
Maximum Input Voltage ^
±25 V peak; 25 V p-p ac at 10 kHz or less.3
SIGNAL OUTPUTS
CALIBRATO R (A SEC/DIV switch set to 1 ms
per division)
Voltage
1 M£2 Load 0.4 V ±1%.
50 £2 Load 0.2 V±1.5% .3
Current (short-circuit load) 8 mA ±1.5%.a
Repetition Period
Two times the A SEC/DIV switch setting w ithin the range o f 200 ns
to 200 ms.
Accuracy
±0.1% during sweep time.
Symmetry Duration o f high portion of output cycle is 50% o f output period
± (lesser o f 500 ns or 25% o f period).3
Jitter o f Pulse Period or Pulse Width
10 ns or less.3
CH 2 SIG NAL OUT
O utput Voltage 20 mV per division ±10% into 1 M£2;
10 mV per division ±10% into 50 £2.
Offset
±5 mV into 50 £2, when dc balance has been performed w ithin
±5°C o f the operating temperature.
A GATE OUT and B GATE OUT
O utput Voltage
2.4 V to 5 V positive-going pulse, starting at 0 V to 0.4 V.
O utput Drive
Will supply 400 juA during H 1 state; w ill sink 2 mA during LO state.3
Perform ance Requirement not checked in manual.
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