B&K Precision 2190B Instrukcja Obsługi Pobierz pdf (Strona 12)

TV-H:

Used for triggering from television horizontal sync

pulses. Also servesas hi-pass (lowfrequency reject)

trigger coupling.

LINE:

Signal derived from input line voltage (50/60 Hz)

becomes trigger.

29. TRIGger LEVEL/PULL (–) SLOPE Control.

TRIGger LEVEL:

Trigger level adjustment; determines the point on

the triggering waveform where the sweep is trig-

gered. Rotation in the (–) direction (counterclock-

wise) selects more negative triggering point;

rotation in the (+) direction (clockwise) selects

more positive triggering point.

PULL (—) SLOPE:

Two-position push-pull switch. The “in” position

selects a positive-goingslope and the “out” position

selectsa negative-goingslope as triggering point for

main sweep.

30. EXTernal TRIGger Jack. External trigger input for

single- and dual-trace operation.

REAR PANEL CONTROLS (not shown)

31. Fuse Holder/Line Voltage Selector. Contains fuse

and selects line voltage.

32. Power Cord Receptacle.

33. CH 2 (Y) SIGNAL OUTPUT Jack. Output terminal

where sample of channel 2 signal is available. Ampli-

tude of output is nominally 50 mV per division of

vertical deflection seen on CRT when terminated into

50 Ω. Output impedance is 50 Ω.

34. Z-Axis Input Jack. Input jack for intensity modula-

tion of CRT electron beam. TTL compatible (5 V p-p

sensitivity). Positive levels increase intensity.

35. Handle/Tilt Stand.

36. Feet/Cord Wrap.

CONTROLS AND INDICATORS

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 23 24

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B&K Precision 2190B Instrukcja Obsługi Strona 12