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7
1. General information
1.1.
INTRODUCTION
The L.F. generator produces sine and squarewave signals in the frequency range 9 Hz up to 110 kHz with very
low harmonic distortion. The output voltage is continuously variable and an additional 20 dB attenuation may
be set by means of a pushbutton switch. A second output delivers a squarewave signal which is TTL compatible.
This compact and lightweight instrument is extremely suitable for education and service purposes due to its
simple operation, and because of its low distortion it is ideal for the servicing of H 1-F I equipment.
1.2.
TECHNICAL DATA
General information
The instrument has been
d~signed
and tested in accordance with I EC publication 348 for Class 1 instruments
and has been supplied in a safe condition.
This instruction manual contains information and warnings which must be followed by the purchaser to ensure
safe operation and to maintain the instrument in a safe condition.
Only properties expressed in numerical values, with tolerances stated, are guaranteed by the factory. All
specifications will be met after a warming-up period of 30 minutes in a constant position.
If not stated otherwise, relative tolerances (in p.p.m. or%) relate to the adjusted value.
SPECIFICATIONS
Frequency
Nominal range
Measuring range
Adjustment
Setting error
Short-time drift, within 15 minutes
Long-term drift, within 7 hours
Temperature coefficient
Dependance on mains voltage
(within nominal range)
Wave forms
Outputs
1. Output Z
0
600
n
Connector
Internal resistance
Maximum load
Load resistance
nominal range
-
reference value
9Hz to 110kHz
10 Hz to 100 kHz, divided into four overlapping
sub-ranges
dial with a half-logarithmic scale, and four range-
selector switches; x10 Hz, x100 Hz, x1 kHz, x10 kHz
± 5% ± 1 Hz of the set value
<
500. 10-6
<
1500. 10-6
<
500. 10-6/deg C (500 ppm/deg C)
<
10. 10-6
Sinewave
Squarewave
BNC socket
600rl
Short-circuit proof
~
100rl
6oon
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