Wavetek 193 Instruction Manual page 9

1-1
Frequency Range
0.002 Hz to 20 MHz in nine overlapping decade
ranges with 1% of full scale vernier.
Function Output
Waveforms variable to 30 Vp-p (15 Vp-p into 500).
Waveforms may be attenuated continuously to 80 dB.
500 source impedance.
DC Output and DC Offset
Adjustable between ± 15 Vdc (± 7.5 Vdc into 500)
with signal peak plus dc offset limited to ± 15 Vdc
(± 7.5 Vdc into 500). DC offset and waveform at-
tenuated proportionately 10 dB/step to 70 dB.
Sync Output
TIL level pulse into 500. Duty cycle varies with SYM
control. 500 source impedance.
GCV Output
o
to
+
5V open circuit voltage level proportional to
main generator frequency. 6000 source impedance.
AM -Amplitude Modulation
Either an internal signal (AUX GEN), or external signal
(AM IN), or internal plus external signals (AUX GEN
MODE-AM, main generator FUNC-AM) amplitude
modulates the main generator's sine wave in either
the 0 to 100% AM or suppressed carrier mode.
AM Input: 5 Vp-p gives 100% modulation 10 Vp-p
gives suppressed carrier operation. 6000 input
impedance.
Carrier Level (0 to 100% AM): Adjustable 10 to 50%
of full amplitude at function output.
Carrier Null (Suppressed Carrier AM): Adjustable
± 2% of full amplitude at function output.
VCG-Voltage Controlled Generator
Up to 1000: 1 frequency change with external 0 to
± 5V signal. Upper frequency limited to maximum of
range.
Slew Rate: 2% of range per p,s.
Linearity: ± 0.5% thru X100K range; ±5% on X1M
and X10M.
Impedance: 10 kQ.
Trigger Input
Input Range: 1 Vp-p to ± 10 V.
SEcnON1
GENERAL DESCRIPTION
1.2 SPECIFICATIONS
1.2.1 Main Generator
Waveforms
Selectable sine '\, triangle
I'y,
square
'L ,
AM sineft
and dc.
Symmetry
Symmetry of all waveform outputs is continuously
adjustable from 1:19 to 19:1*. Varying symmetry pro-
vides variable duty-cycle pulses, sawtooth ramps and
distorted sine waves.
Operational Modes
Continuous: Generator runs continuously at selected
frequency.
Triggered: Generator is quiescent until triggered by
external signal or manual trigger, then generates one
complete waveform cycle at selected frequency.
Gated: As triggered mode, except output continues
for duration of gate signal. Last waveform started is
completed,
1.1 THE MODEL 193
The Wavetek Model 193, a 20 MHz Sweep/Modulation
Generator, is a precision source of slne
oo.
triangle
I'y,
square 'L, AM sine ~ and dc. All
waveforms are front panel variable from 0.002 Hz to
20 MHz and can be internally and externally
modulated. Outputs can be continuous, triggered or
gated by an external trigger signal or a front panel
manual trigger switch. The main generator can be
swept, frequency modulated, 0 to 100% amplitude
modulated and suppressed carrier modulated using
the auxiliary generator or an external source. The aux-
iliary generator, in addition to being an internal
modulation generator, can be used as an independent
function generator. Both generators have symmetry
control of waveforms and can be frequency
modulated by an external signal. Each modulation
parameter has a static setup feature to allow its exact
selection. Amplitude of the waveforms is variable
from 30 Vp-p (15 Vp-p into 500) down to 1.5
mVp-p. DC reference of the waveform can be offset
positively or negatively. Maximum 150 mA peak cur-
rent can be continuously varied over an 80 dB range.
A sync output provides a TIL level into 500.