Tektronix TDS544A Manuale Utente Scaricare il pdf (Pagina 80)

Performance Tests

Performance Verification Procedures

Press VERTICAL MENU.

If needed, press the main-menu Fine Scale.

Use the keypad to set fine scale to 500 mV (press 500, SHIFT,

m, then ENTER).

Connect another the PAL signal source’s composite signal con-

nector (labelled COMPST on the TSG 121) through a 75 cable

and a 75 terminator to the CH2 input (See Figure 1-34).

BNC T

Connector

Signal

Generator

SG 502

PAL Signal

Source

TSG121

COMPST

Terminator

Cable

Terminator

Figure 1-34: Subsequent 60 Hz Rejection Test Hookup

CONFIRM that the TRIG’D LED stays on and that the waveform

on screen is stable. Stable means the waveform does not move

horizontally or vertically. Also, confirm that the waveform on the

screen has one positive pulse and a number of negative pulses

(See Figure 1-35).

1 2 ... 75 76 77 78 79 80 81 82 83 84 85 ... 113 114

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Tektronix TDS544A Manuale Utente Pagina 80