General Description; Specifications - Wavetek 801 Instruction Manual

1.1 THE MODEL 801
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,
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.
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.

1.2 SPECIFICATIONS

1.2.1 Versatility
Five Simultaneous Pulse Outputs
Fixed level ECL, m, TTL and sync pulses and a pulse
and variable rise/fall times. Pulses
with variable amplitude
50 MHz frequency range (200 ms
available over a 5 Hz to
to 20 ns periods).
Operational Modes
Continuous: Generator oscillates continuously at selected
frequency.
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: Conti nuous, trigger and gate, as above,
except two pulses for each period. Space between pulses of

GENERAL DESCRIPTION

double pulse controlled by delay control. Double pulse at
all outputs except sync.
External Width: External signal at trigger input and trigger
level control determine output pulse width and period as
shown.
TRIGGER LEVEL WINDOW
Trigger Burst: External trigger starts internal gate (delay
time) for pulse burst (1 to 100 pulse range) as shown.
TRIGGER
' DELAY TIME' GATE
PULSE BURST OUTPUT
1.2.2 Pulse Outputs
Variable Amplitude Pulse
Upper and lower pulse levels are independently adjustable.
Pulse dynamic range is *2OV into an open circuit from the
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.
1
SECTION
TRIGGER LE
TRIGGER LEVEL
l - l