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Wavetek 148A Instruction Manual page 4

2 0 mhz am/fm/pm generator

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1.2.1 .12
Frequency Precision
Dial Accuracy
(I
of setting + 1 % of full range) on x 100 thru
x 1 M ranges.
(2% of setting + 2% of full range) on
x 10 and x 10M ranges.
Time Symmetry
0.5% on x 100 thru
2.0 on dial.
5% on all other ranges and from 0.02 to 2.0 on dial.
Amplitude Precision
1.2.1 .13
Amplitude Change With Frequency
Sine variation less than:
0.1 dB thru x 1 OOk ranges;
0.5 dB on x 1 M range;
x
3 dB on
10M range.
Step Attenuator Accuracy
0.3 dB per 20 dB step at 2 kHz.
Waveform Characteristics
1.2.1.14
Sine Distortion
<0.5% on x 100 Hz to x 10 kHz.
< 1 .O% on x .01 to x 10 Hz and
All harmonics 30 dB below fundamental on
range.
All harmonics 26 dB below fundamental on
range.
Square Wave Rise/Fall Times
At FUNCTION OUT < 25 ns for 15V p-p into a
Triangle Distortion
Odd harmonics within 15% of correct value to 2 MHz.
Modulation Generator
1.2.2
1.2.2.1
Waveforms
Selectable sine
r a m p M a n d d o w n r a m p M .
Frequency Range
1.2.2.2
0.1 Hz to 100 kHz in three 100:1
,
,
ranges.
Sweep: 0.2 Hz to 200 kHz (2
x .Ol
x
IOOk ranges and from 0.2 to
x
100 kHz ranges.
x
, square
, triangle
x
1.2.2.3
,
about ground. M and
from 0 to + 5V.
thru
1.2.2.4
Voltage control of modulator frequency with sensitivity
of 20% of range per volt. Input impedance is 5
1.2.2.5
Sine Distortion
< 5 %
Time Symmetry
<
from 1 Hz to 10 kHz.
from 0.1 Hz to 100 kHz.
1.2.3 General
1.2.3.1
Short Term:
Long Term:
1.2.3.2
Specifications apply at 25°C
will operate from O°C to 50°C ambient temperatures.
x
1.2.3.3
I MHz
28.6 cm (11
10 MHz
in.) deep.
1.2.3.4
5 kg (11 lb) net; 6.6 kg
load.
1.2.3.5
90 to 105V, 108 to 126V, 198 to 231V and 216 to 252V
selectable; 48 to 400 Hz; less than 40 watts.
, up
Unless otherwise noted, ail specifications
apply from 0.1 to 2.0 on frequency dial
when FUNCTION OUT is at maximum and
at OFF. Symmetry and vernier affect fre-
quency calibration. Maximum possible
asymmetry is a function of frequency
setting).
setting.
Output
and
are fixed level 10V p-p balanced
M
are fixed level 5 Vp
Frequency Modulation (FM IN)
Waveform Characteristics
Stability (for amplitude, dc offset and
frequency)
0.05% for 10 minutes.
for 24 hours.
Environmental
5 ° C ambient Instrument
Dimensions
in.) wide; 13.3 cm (5
Weight
lb) shipping.
Power
NOTE
terminated, with SYMMETRY control
in.) high; 27.3 cm
1-3

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