Tektronix 492 - Page 24

Do
not
exceed mixer input
limits . Refer
to the
external mixer
operating
instructions at the
end of
the
General
Operating
Information
part of this
section
.
34
CAUTION
2-12
PEAKING . This
control varies
mixer
bias for
external mixers
in the EXT
MIXER mode .
If the
492
has a
preselector (
Option 1 ) , the
control also
adjusts the
preselector
filter
tracking for
the 1.7 to
21
GHz frequency
range (
Bands
2-5
) .
In
both
cases
it is
adjusted
for
maximum signal
amplitude . Refer to External Mixer Operation for
more
detailed
instructions .
Rear
Panel ( Fig .
2-2
)
1
EXT IN HORIZ / TRIG . Dc coupled input for
horizontal drive voltages and ac coupled for
trigger
signal .
A to
+10 volt
ramp
produces
full
sweep . 0.5 to
50 volt peak
signals are
required for
trigger (
0.1 us
minimum
pulse width ) , 15
Hz to
1
MHz .
Selection as to
HORIZ
or
TRIG mode
depends
on
front
panel
TRIGGERING
and
TIME / DIV selections .
2
3
5
4
VERT (
output
) . Source
of a
signal
that
is
0.5 V for
each division of display .
6
PROBE POWER . Provides operating voltage
(
± 15 V and
+5 V )
for
active probes ,
such as
TEKTRONIX P6056 or P6021 . Refer to probe
instruction
manuals for
operating procedures .
7
HORIZ
(
output ) .
Source
of a
signal
that is 0.5
V
for each division of display .
PEN
LIFT . TTL
compatible
, nominal
+5 V
provid
ed
to lift the
pen of a
chart
recorder .
10
MHz IF (
+20
dBm max ) .
Access to
the 10
MHz
IF
signal
.
Output
level
is
about
-10
dBm
with a
full
screen
signal at -30
dBm reference
level
,
maximum
output is
+20 dBm .
J104
ACCESSORY
.
Possible
future
applications
for
the
492 may use
this connector
.
492
Operator's
Handbook