Tektronix 47E5A User Manual

Product: 465B OPERATORS Change Reference: ---~M~3::..::9:..:.7...::4~6 ___ _
Date: 12-11-80
For interlaced video signals, the TV FIELD trigger signals may start the A
SWeep on either Field 1 or Field 2 ("even" or "odd" fields respectively in
CCIR System B terminology). Trigger signal selection is accomplished with the
A TRIGGER SIDPE switch.
When the A TRIGGER COUPLING switch is set to either TV FIELD or TV LINE
(see Figure 34), the A TRIGGER SOURCE switch selects the source of the
signals to be processed in the Sync Separator. '!his includes NORM (composite
vertical signal), CH 1, CH 2, EXT, or EXT/10. (LINE source is not a usable
function with TV FIELD or TV LINE coupling.)
With the A TRIGGER COUPLING switch set to either TV FIElD or TV LINE, the
selected sync output from the Sync Separator is automatically applied to the A
SWeep TRIGGER circuit for use as the triggering signal for the A SWeep. For
the B SWeep, the horizontal-sync signal (line-rate sync) from the Sync
Separator is fed only to the TV LINE position of the B TRIGGER SOURCE switch
to be selected at the option of the user.
Option 05 circuitry requires sync-negative composite video for proper
operation. '!his signal polarity is used with most standard broadcast systems
employing 405 to 819 lines at 50- or 60-Hz field rates and with closed-circuit
systems having up to 1201 lines at a 60-Hz field rate. Sync-positive video
may be used as discussed later under "Operation of the Sync Separator."
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Tektronix 47E5A Specifications

General

Brand	Tektronix
Model	47E5A
Category	Measuring Instruments
Language	English