Wavetek 142 Instruction Manual page 8

SYNC OUTPUT
Amplitude
greater
than 4
V
p-p into
open
circuit;
2
V
p-p
into
50 ohms. Square waveform
for
symmetrical
outputs;
rectangular
waveform
for pulse
and ramp
outputs.
Sync
pulse
polarity
is
opposite that of output square wave.
DC OFFSET
Can
be controlled
manually
using the front panel control,
or electronically
by applying an
external voltage. Adjust-
able range
is
±10 Vdc
into
open
circuit (±5
Vdc
into
50-ohm
load)
with peak output,
at
the output,
limited
to
±15 Vdc
into
open
circuit
(±7.5
Vdc
into
50Q). External
offset
sensitivity
is
approximately
—0.4 V/V
with output
connected
to
50-ohm
load.
DC
offset
and output waveform
are attenuated proportionately by the
60 dB
output
attenuator.
1.3.2
Horizontal
Precision
FREQUENCY ACCURACY
(Dial
Accuracy) Symmetrical
Waveforms
0.01
Hz
to
1
MHz
±(1%
of
setting
+ 1%
of
full scale).
1
MHz
to
10
MHz
±(2%
of setting
+
2
%
of
full scale).
VERNIER
Permits frequency adjustment of approximately
1%
of
range.
TIME
SYMMETRY
10
Hz
to
100
kHz
±0.5%
0.01
Hz
to
500 kHz
±1.0%
1.3.3
Voltage-Controlled
Generator
VCG CONTROL RANGE
Up
to
1000:1 frequency change with
external voltage
input.
Upper
frequency
is
limited to
maximum
of selected
range.
Required external
signal for
full
voltage control
is
5 volts
with input impedance
of 5
kf2.
VCG
INPUT
FREQUENCY
VCG
Bandwidth 100
kHz
VCG
Slew Rate
2%
of range/microsecond
VCG
LINEARITY
10
Hz
to
100 kHz ±0.2%
of
full
scale
0.001
Hz
to
1
MHz
±0,5%
of
full scale
1.3.4
Vertical Precision
SINE
WAVE FREQUENCY
RESPONSE
Amplitude change
with frequency
less
than:
0.1
dB
to
100
kHz
0.2
dB
to
1
MHz
2,0
dB
to
10
MHz
STEP
ATTENUATOR ACCURACY
±0.25dB/10dB
STABILITY
Short term ±0.05%
for
10 minutes
Long
term
±0.25%
for
24
hours
Percentages apply to amplitude, frequency, and dc
offset.
AMPLITUDE
SYMMETRY
All
waveforms
(except
pulse) are
symmetrical about ground
within
±1%
of
maximum
peak-to-peak amplitude.
1.3.5 Purity
SINE
WAVE
DISTORTION
10
Hz
to
100
kHz
.
.
.less
than 0.5%
(typically
0.25%)
100
kHz
to
1
MHz
less
than 1.0%
1
MHz
to
10
MHz
. .
all
harmonics
at
least
30 dB down
TRIANGLE LINEARITY
0.002
Hz
to
100
kHz
.
greater
than
99%
by
using the best
straight line
method
SQUARE
WAVE
RISE
AND
FALL
TIME
(terminated
in
50Q
load)
Less than
20
nanoseconds;
limited to
500 V/microsecond.
TOTAL ABERRATIONS
Less
than
5%
1.3.6
Environmental
TEMPERATURE
All specifications
listed,
except
for
stability,
are for
25°C
±5°C. For operation from 0°C
to
55°C,
derate
all
specifications
by
a
factor of
2.
1-2
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