Wavetek 171 - Page 7

GCV
(Generator
Controlled Voltage) Output
0
to
+2V
(nominal,
open circuit)
proportional to
frequency
of
main generator. Output
impedance
600ft.
VCG
(Voltage
Controlled
Generator)
Input
In function
generator
mode only, VCG
voltage as
well
as
dial
settings
select
generator
frequency.
Frequency may be
dc-programmed
'or
ac-modulated by
external
0 to
2V signal.
Input
impedance
is
2
kft. VCG
input can change
generator
output 1000:1
in function
generator
mode
on
all ranges
(limited by a
minimum
VCG frequency of
0.1 Hz).
VCG Input
Signal
Bandwidth: 100 kHz.
VCG
Slew Rate:
0.1 V/ps.
External
Reference
Input
1
MHz
sine or
square
wave external
reference clock
signal
of
1
Vrms
to
10
Vrms.
5
kft input
impedance.
Reference Output
TTL
level
1
MHz pulse train output
when in the
synthesizer
mode.
Optional
TTL buffer
circuit
provides high power
TTL com-
patible
signal capable of
driving
load
impedances as low as
50ft.
1.2.2
Operating
Modes
Synthesizer
Operates as a
synthesizer
with function
generator outputs
locked
to
the
synthesizer
frequency.
The frequency
is deter-
mined
by
the
frequency
multiplier switch
and the digital
switch
settings. The
digital switch is
operable from 0.1000
and 1.9999
on all
ranges above the X 1
range.
Voltage
Controlled
Generator (VCG)
Operates
as a
conventional
VCG.
The frequency
is controlled
by the
dial, multiplier
switch and external VCG
voltage on
all
ranges.
1.2.3
Horizontal Precision
Synthesizer
Operation
Accuracy:
0.005% of setting.
Stability:
1
ppm per degree
C.
Internal
Frequency Standard:
4 MHz
crystal with
an aging
rate of
20
ppm per year.
Locking
Time:
Within 10% of
final
frequency in < 100
ms;
within 0.01% of final
frequency
on X IK, X
10K, X 100K
and X
1M
ranges
in < 300 ms, X
100
in < 2s, X 10
in < 20s.
Dial/VCG
Operation
Dial Accuracy: ±3%
of
full
scale
for
0.1 Hz to
200
kHz;
±
5%
of
full
scale
for 200
kHz to 2
MHz.
Time Symmetry
±1% on
all
ranges
except
X
1M
range.
1.2.4
Vertical
Precision
Amplitude
Change
With
Frequency (Sine)
Less
than
±0.1 dB
on
all ranges
thru
X
100K.
Less
than
±0.5 dB on X
1M range.
1.2.5
Waveform
Purity
Harmonic
Distortion
Less
than 0.5% to
20
kHz (typically
0.2%).
Less
than 1.0% to 200
kHz
(typically
0.5%).
All harmonics 30
dB
below
fundamental on X 1M range.
Spurious
Signals
Typically 70
dB
below
fundamental
to
20
kHz
and 40 dB
below
fundamental to 2
MHz (in synthesizer mode
only).
Integrated
Signal to
Phase
Noise
Typically 30 dB to 200
kHz
measured
over ±15 kHz band-
width excluding
carrier
±10 Hz (in
synthesizer mode only).
Square
Wave Rise and
Fall Time
Less
than 75 ns.
Triangle
Linearity
Greater
than
99% to
200
kHz.
TTL Pulse Rise and
Fall Time
Less than 25
ns
(15
ns typical).
1.2.6
Environmental
Specifications
apply
at 25°C ±5°C.
Instrument
will operate
from
0°C to +50°C.
1.2.7
Mechanical
Dimensions
1 1% in./28.6
cm wide;5!4 in. /13.3cm
high; 10% in./27.3
cm
deep.
Weight
8.5
lb/3.85 kg net; 12
lb/5.5 kg
shipping.
1.2.8
Power
90
to
1 10V, 105 to 125V,
180 to
220V or 210 to
250V; 50
to
400
Hz;
less
than 18 watts.
NOTE
AH
specifications
apply when
frequency
dial
is
between 0.
1 and 2.0
or digital switch
is
between
0.
1000
and
1.9999,
amplitude is at 10V
p-p
and
output is
from the
50Q, BNC
into
a
500.
load.
1-2