Wavetek 143 Instruction Manual page 7

Symmetry
Symmetry of all waveform outputs is continuously adjust·
able from 1: 19 to 19: 1. Varying symmetry provides variable
duty cycle pulses, sawtooth ramps and distorted sine waves.
NOTE
When SYMMETRY control is used, indicated
frequency is divided by approximately 10.
1.2.2 Frequency Precision
Dial Accuracy
±3% of full range from X .01 Hz to X 1 MHz.
±5% of full range on X 10
MHz.
Time Symmetry
Square wave
variation less
than:
± 1
%
from 0.001 Hz to 200 kHz
±0.5% from 20 Hz to 20 kHz
1.2.3
Amplitude Precision
Amplitude Change With Frequency
Sine variation less than:
0.
1
dB for 0.001 Hz to 200 kHz
0.5 dB for 200 kHz to 2 MHz
3.0 dB for 2 to 20 MHz
Step Attenuator Accuracy
0.3 dB per 20 dB step at 2 kHz.
1.2.4
Waveform Characteristics
Sine Distortion
< 0.5% on X 100 Hz to X 10 kHz.
< 1.0% on X .01 to X 10 Hz and X 100 kHz.
All harmonics 34 dB below fundamental on
X
1 MHz.
All harmonics 26 dB below fundamental on X 10 MHz.
1-2
Square Wave Rise/Fall Times
At FUNCTION OUT< 20 ns for 15V p-p output into 50H
load.
1.2.5
General
Stability
Short Term: ±0.05% for 10 minutes.
Long Term: ±0.25% for 24 hours.
Percentages apply to amplitude, frequency and de offset.
Environmental
Specifications apply at 25°C ±5°C. Instrument will operate
from 0°C to 50°C ambient temperatures.
Dimensions
28.6 cm (11 '14 in.) wide; 13.3 cm (15 V. in.) high;
27.3 cm (10% in.) deep.
Weight
5 kg ( 11 lb) net; 6.6 kg ( 14
Y,
lb) shipping.
Power
90 to 105V, 108 to 126V, 198 to 231V and 216 to252V
selectable; 48 to 400 Hz; less than 30 watts.
NOTE
All specifications apply from 10 to 100% of a
selected frequency range, when FUNCTION
OUT is at maximum and 50Q terminated, with
SYMMETRY control at OFF. Symmetry and
vernier affect frequency calibration. Maximum
possible asymmetry is a function of frequency
setting.