Wavetek 145 Instruction Manual page 11

Impedance: 10 kQ, 33 pF.
Pulse Width: 25 ns minimum.
Repetition Rate: 10 MHz maximum.
Adjustable Triggered Signal Start/Stop Point (sine and tri-
angle only): Approximately -90° to +90° to 2 MHz.
1.2.3 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
1.2.4 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.
1.2.5 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.
Square Wave Rise/Fall Times
At FUNCTION OUT <20 ns for 15V p-p output into 50Q load.
1.2.6 Pulse Generator
Pulse Outputs
Variable amplitude pulse, and simultaneous fixed ECL, ECL,
TIL and TIL pulses and TIL sync pulse. All outputs can drive
50Q terminations.
Operational Modes
Continuous, triggered and gated plus the following.
Normal Pulse: Adjustable width pulse in phase with sync
signal.
Delayed Pulse: Pulse delayed with respect to normal pulse.
Pulse delay and pulse width adjustable.
Double Pulse: Two pulses for every period. Time between
pulses and pulse width adjustable. Minimum period 100 ns.
1-2
Pulse Period Range
50 ns to 10,000s •in 10 overlapping ranges with approxi-
mately 1 % vernier control.
Pulse Width
25 ns to 1 ms in 5 overlapping ranges with vernier control.
Includes OFF and square wave.
Pulse Delay
50 ns to 10 ms in 6 overlapping ranges with vernier control.
Duty Cycle
Duty cycles to 70% for periods
>
100 ns (< 10 MHz); for
periods < 100 ns
(>
10 MHz) duty cycles are approxi-
mately 50%.
Function Output
Variable to 30V p-p ( 15V p-p into 50QJ. DC offset and
attenuation are same as for function generator.
Pulse Rise/Fall Times
At FUNCTION OUT,< 20 ns for 15V p-p output into 50!1
load.
1.2.7 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 23°C ± 5°C. Instrument will operate
from 0°C to 50°C ambient temperatures.
Dimensions
28.6 cm (111.14 in.) wide; 13.3 cm (5 % in.) high; 27.3 cm
(10%
in.) deep.
Weight
5 kg ( 11 lb) net; 6.6 kg ( 14'/2 lb) shipping.
Power
90 to 105V, 108 to 126V, 198 to 231V and 216 to 252V
selectable; 48 to 400 Hz; less than 30 watts.
NOTE
All specifications apply from 0.1 to 2.0 on fre-
quency dial when FUNCTION OUT output is
at maximum and 50!1 terminated. Function
generator specifications apply when PULSE
WIDTH control is OFF.