Operating Instructions-Type
1 84
TRIGGER
SELECTOR
H.F. SELECTOR
2-2
Pushbutton selector switches similar to the
MARKER SELECTOR switch select trigger
pu lses for external equipment. These
selected trigger pu lses are in time coinci
dence with the corresponding decade time
markers. They are available at the TRIG
GER OUTPUT connector as positive-going
pulses with a minimum ampl itude of 0.4
volts into 50 n.
Selects 2 ns
(500
MHz) or
5
ns (200 MHz)
sine-wave signal and appl ies either to the
OUTPUT connector directly below the H.F.
SELECTOR switch. Ampl itude of these sine
wave time-marker intervals at the OUTPUT
connector is greater than 0.3 volts into
50 n. When the H.F. SELECTOR switch is
in either of these two positions, the 10 ns
marker interval is disabled.
NOTE
I n order to obtain a sine-wave
signal from the
H.F.
SE LECTOR
MARKER
AMPLI FIER
POWER
Indicator
OVEN Indicator
OUTPUT, a m arker button must
be pushed in to apply power to
the unit.
Time markers from 1
fLS
to
5
s established
by the MARKER SELECTOR pushbutton
switches are available as positive or nega
tive, amplified time markers at the OUT
PUT connector below the switch. The
amplitude of these time ma rkers is greater
than 25 volts into 1 kn.
Power is appl ied when any one of the
MARKER SELECTOR switches is pushed in.
Power is turned off by the POWER OFF
switch. A POWER indicating light will go
on when power is applied.
This indicating light is across the heater
windings in the crystal oven and therefore
mon itors the operation of the thermostat.
It indicates when the heater is on. The
crystal oven power is independent of the
POWER OFF switch.
®
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