Avtech AV-1002-C-KMP2 Instructions Manual page 10

OPE G TRUCTIO
POWER Switch
The POWER pushbutton switch applies AC prime power the the primaries of the trans-
former, turning the instrument on. The pushbutton lamp (#382 type) is connected to the
+ 15V DC supply.
INT/EXT Switch
In the "INT" position the instrument is internally triggered and the "SYNC OUT/TRIG IN"
connector provides a SYNC output, which allows one to trigger other instruments, such
as oscilloscopes. In the "EXT" position the instrument is triggered by a TTL level input pulse
on the "SYNC OUT/TRIG IN" connector, or by pressing the "SINGLE PULSE" pushbutton.
SINGLE PULSE Pushbutton
The "SINGLE PULSE" pushbutton will trigger the instrument manually for one cycle of
output, when the "INT/EXT" switch is in the "EXT" position. Otherwise, the pushbutton has
no effect.
SYNC OUT/TRIG IN Connector
When in the "INT/EXT" switch is in the "INT" position, this connector supplies a SYNC
output, that can be used to trigger other equipment, particularly oscilloscopes. This signal
leads the main output by a duration set by the "DELAY" controls, and has an approximate
amplitude of - 2V in 50Q, or- 4V into 1MQ, with a pulse width of about 10ns. When the
switch is in the "EXT" position, the external trigger is applied to this connector. This input
presents a high impedance (greater than 1kQ). Should an input impedance of 50Q be
required, it must be added manually at the input.
GATE Input
The GATE input will suppress the triggering of the instrument if grounded, or taken to a
TTL LOW level (i.e. 0 to 0.8V). If it is left open, or taken to a TTL HIGH level (i.e. + 2.4V to
5.0V), normal triggering will occur. This connector has a high input impedance (greater
than 1kQ.)
REPETITION RATE Controls
The rotary switch marked "RANGE" selects the pulse repetition rate for the internally
triggered mode. The vernier (labeled "MIN - MAX" provides continuously variable control
of each range. There are seven ranges and the instrument is set to the rate indicated on
the front panel when the vernier is in the "MAX" position.