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1
SECTION
GENERAL DESCRiPTION
1.1
THE MODELS 180 AND 180LF
The Wavetek Model 180 Sweep/Function Generator is a
precision source of sine, triangle, and square waveforms.
Frequency of the waveforms is manually and remotely
variable from 0.1 Hz to 2 MHz. The generator can repeti
tively sweep from one frequency to a higher frequency,
with controllable rate and range of sweep. Amplitude of
the waveforms is variable from 10V peak-to-peak into 50f2
down to 30 mV p-p. DC reference of the waveforms can be
offset positively and negatively.
A
voltage representing generator frequency, a fixed
amplitude pulse train of that frequency, and a voltage ramp
representing frequency sweep rate are provided as front
panel outputs.
The Wavetek Model 180LF (Low Frequency) Sweep/Func
tion Generator is identical to the Model 180 except for
frequency range: 0.01 Hz to 200 kHz.
1.2
SPECIFICATIONS
The specifications (available waveforms, frequencies, and
amplitudes), operating modes, precision (accuracy), and
purity (quality) are listed in the following paragraphs.
1.2.1
Versatility
Output Signals
Sine % , triangle
ramp ^ and DC.
square
""Lj , TTL pulse J~L
Control
Generator operates in continuous and sweep modes. Fre
quency controlled manually or with external voltage.
Frequency Range
0.1 Hz to 2 MHz (180); 0.01 Hz to 200 kHz (180LF).
Operating Frequency Ranges
Model 180:
XI
0.1 Hz to 2 Hz
X 10
0.1 Hz to 20 Hz
X100
0.2 Hz to 200 Hz
X IK
2 Hz to 2 kHz
XIOK
20 Hz to 20 kHz
X 100K
200 Hz to 200 kHz
X 1M
2 kHz to 2 MHz
Model 180LF:
X.I
0.01 Hz to 0.2 Hz
X I
0.01 Hz to 2 Hz
X 10
0.02 Hz to 20 Hz
X100
0.2 Hz to 200 Hz
X IK
2 Hz to 2 kHz
X10K
20 Hz to 20 kHz
X 100K
200 Hz to 200 kHz
Main Output
Sine, triangle and square waveforms and DC are selectable.
HI (0 dB) and LO (-20 dS) BNC outputs are available for
simultaneous usage; outputs may be varied to HI (—30dB)
and LO (—50 dB) by amplitude control. HI output provides
20V peak-to-peak max open circuit (10V peak-to-peak max
into 50n load). LO output provides IV peak-to-peak max
into 50n load. Both output impedances are 50^2.
DC Offset and DC Output
DC offset of waveform and DC output selectable and variable
through HI and LO BNC outputs. HI output ±10V max
(±5V into 50n load) as offset or Vdc output. LO output
±1V max into 50n load as offset or Vdc output. Waveform
offset limited to ±10 Vp HI and ±1 Vp LO (both open
circuit voltages).
Pulse Output
TTL pulse (50% duty cycle) at generator frequency. Drives
up to 20 TTL loads.
GCV Output
0 to +2V (nominal, open circuit) proportional to frequency
of main generator. Output impedance 600J2.
VCG — Voltage Controlled Generator Input
VCG voltage as well as control settings select generator
frequency. Frequency may be dc-programmed or ac-mod-
ulated by external 0 to 2V signal. Input impedance is 2 kS7.
VCG input can change generator output 1000:1 on all
ranges except X 10 Hz and X 1 Hz ranges (Model 180) and
X 1 Hz and X .1 Hz (Model 180LF).
VCG Input Signal Bandwidth; 100 kHz.
VCG Slew Rate: O.IVZ/JS.
1-1
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