Tektronix 485 Operator's Handbook Manual page 9

VARIABLE (CAL IN}
CH1 VOLTS/DIV
AMD Ber
CH2 POLARITY
E 3
Come
& DALY WHEN femme.
HORDES LOCKED
NORM 4 TRIGGER
HOLDOFF
MECREASE
A TRIGGERING
COUPLING SOURCE
ac
INT
EXT TRIG
AY,
LUNE
MM
SU SVAMS MAS
TEKTRONIA, INC.
23. Input Selector Switch, CH 1 and CH 2
AC
Capacitively couples input signal to vertical amplifier,
GND
Grounds the amplifier input and permits precharging the AC
input coupling capacitor. 50 2 termination is disconnected in
the 50 2 mode.
DC
Signal is directly coupled to the vertical amplifier.
Operating Instructions—485 Operators
Input CH 1 OR Y Connector and CH 2 OR X Connector
BNC connectors for applying external signals. Included are
concentric coding rings for probes with scale factor and identify
switching.
POSITION Controls, CH 1 and CH 2
Vertically position the display. In X-Y mode, CH 1 control
positions in the Y axis and the CH 2 control positions in the X
axis.
CH 2 POLARITY Switch
+UP and INVERT slide selector provides for inverting CH 2
display.