Tektronix 7B92 Instruction Manual page 8

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Operating Information-7B92 Service
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CONNECTORS
DUAL TIME BASE
Fig. 1·2. Fr o nt·panel co ntro ls and co nnec to rs.
CO UPLING . Four pushbutton switches to select trigger
coupling . Selected coupling is indicated by lighted push ·
button.
AC. Rejects DC and attenuates AC signals below
about 30 hertz . Accepts signals between 30 hertz and
500 megahertz.
AC LF RE J . Rejects DC and attenuates signals below
about 30 kilohert z. Accepts signals between 30 kilohertz
and 500 megahertz .
AC H F R EJ. Rejects DC and attenuates signals above
50 kilohertz. Accepts signals from 30 hertz to 50
kilohertz.
DC . Accepts all signals from DC to 500 megahertz.
Scan ... b y OUlsourcl!-Oplions
->
SOURCE . Four pushbutton switches that select the trig·
gering source. Selected source is indicated by lighted
pushbutton.
INT . T rigger signal obtained internally from vertical
unit by way of associated oscilloscope.
LI NE. Trigger signal obtained internal ly from a
sample of the line voltage applied to the associated
oscilloscope.
EXT. Trigger signal obtained from an external signal
applied to the MA IN TRIG IN connector.
EXT
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10. T rigger signal obtained from an external
signal applied to the MAIN I N connector . In this
position the external signal is attenuated 10 times before
it is applied to the trigger circuit.
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