Wavetek 801 Bedienungsanleitung Seite 2
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SECTION
1
GENERAL DESCRIPTION
1.1 THE MODEL 801
double pulse controlled by delay control. Double pulse at
all outputs except sync.
The Model 801 is a 50 MHz general purpose laboratory pulse
generator. The instrument gives you full control in primary
pulse triggering and shaping plus simultaneous TTL, ECL,
ECL
and sync pulses. The primary pulse output has control-
lability in offset and independent rise/fall durations, as well
as pulse width, pulse delay and a choice of positive, negative
or complementary outputs. The TTL, ECL and
ECL
are of
fixed levels and rise times that are standard for use with
compatible devices. The primary pulse has minimum rise
and fall times of 7 ns and a maximum of 250 ms.
External Width: External signal at trigger input and trigger
level control determine output pulse width and period as
shown.
TRIGGER LEVEL WINDOW
TRIGGER LE
The output is
+20
volts with
5Oa
source impedance which
provides
+lO
volts into a
5Oa
load. Upper and lower pulse
levels are fully adjustable through
+20
volts.
External triggering can be set to any point of the rising or
trailing edge of the trigger signal. Single pulses or pulse pairs
may be triggered; pulse width may be trigger controlled;
continuous pulses may be gated and a precise number of
pulses may be triggered for a ‘burst’ output. Manual and
external triggering is indicated by an LED on the front panel
for rapid visual set of trigger level.
Trigger Burst:
External trigger starts internal gate (delay
time) for pulse burst (1 to 100 pulse range) as shown.
TRIGGER LEVEL
TRIGGER
+
I
1.2 SPECIFICATIONS
‘DELAY TIME’ GATE
-I
I
1.2.1
Versatility
Five Simultaneous Pulse Outputs
Fixed level ECL,
m,
with variable amplitude
available over a 5 Hz to
to 20 ns periods).
TTL and sync pulses and a pulse
and variable rise/fall times. Pulses
50 MHz frequency range (200 ms
PULSE
BURST OUTPUT
hlnn
1.2.2
Pulse Outputs
Operational Modes
Continuous: Generator
frequency.
oscillates continuously at selected
Triggered: Generator quiescent until triggered by external
signal or front control, then generates one pulse.
Gated: As triggered mode, except generator oscillates for
the duration of the external signal.
Double
Pulse: Continuous, trigger and gate, as above,
except
two pulses for
each period. Space between pulses of
Variable Amplitude Pulse
Upper and lower pulse levels are independently adjustable.
Pulse dynamic range
is
*2OV
into an open circuit from the
5052 source. The pulse is 20V p-p maximum,
1V
p-p mini-
mum. Into a
5Os1
termination, dynamic range is
+lOV,
maximum pulse 1OV p-p, minimum pulse
0.5V
p-p.
Overshoot and ringing is less than
*(5%
of amplitude setting
+100
mV) into 5Oa load.
Preshoot is less than
+(5%
of amplitude setting
+100
mV)
into
5Oa load.
l-l
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