Wavetek 171 - Page 7

GCV
(Generator
Controlled Voltage)
Output
0
to
+2V
(nominal,
open
circuit)
proportional
to
frequency
of
main generator.
Output
impedance 600!2.
VCG
(Voltage Controlled
Generatpr)
Input
In
function
generator mode
only,
VCG
voltage
as
well
as
dial
settings
select
generator frequency. Frequency may be
de-programmed
'or
ac-modulated by
external 0
to
2V
signal.
Input
impedance
is
2
kil.
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
/µs.
External
Reference
Input
1 MHz sine
or
square wave
external
reference
clock
.signal
of
1 Vrms
to
10
Vrms. 5
kil
input
impedance.
Reference
Output
TTL
level
1
MHz pulse train
output
when
in
the synthesizer
mode.
Optional
TIL
buffer
circuit
provides high
power
TIL
com-
patible signal capable
of
driving load impedances
as
low
as
son.
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
1
K,
X
lOK,
X
lOOK
and
X
lM ranges
in<
300
ms,
X
100
in<
2s,
X
10
in<
20s.
DialNCG
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
al
I
ranges
except
X
1 M range.
1-2
1.2.4
Vertical
Precision
Amplitude Change With Frequency
(Sine)
Less
than
±0.1 dB on
all
ranges thru X
lOOK.
Less than
±0.5
dB
on
X
lM 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
1 M 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
11%
in./28.6 cm
wide;5%
in./13.3
cm high;
10:Y..
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
110V,
105
to
125V,
180
to
220V
or
210
to
250V;
SO
to
400
Hz; less than 18 watts.
NOTE
All
specifications
apply
when frequency dial
is
between
0.
1 and
2.0
or
digi
ta/
switch
is
between
0.1000
and 1.9999, amplitude
is
at
10V
p-p and
output
is
from the
50!2
BNC
into
a
50!2
load.