Hameg HM8030-5 Bedienungsanleitung Seite 13

of the mainframe HM8001. Remove both screws
on rear panel and, holding case firmly in place, pull
chassis forward out of case. When later replacing
the case, care should be taken to ensure that it
properly fits under the edges of the front and rear
frames. After removal of the two screws at the rear
of the module, both chassis covers can be lifted.
When reclosing the module, care should be taken
that the guides engage correctly with the front
chassis.
Provided that all hints given in the operating
instructions of the HM8001 Mainframe were
followed especially for the selection of the correct
mains voltage start of operation consists practically
of inserting the module into the right or left opening
of the mainframe. The following precautions should
be observed:
Before exchanging the module, the mainframe
must be switched off. A small circle (o) is now
(7-segment LED) 4-digit frequency
meter. LED indicators for Hz and kHz.
(push button)
Activates internal wobbulation. Selection of start
frequency, stop frequency and sweep time.
(adjusting knob)
Continuous and linear frequency fine adjustment, with
the setting range from 0.095 to 1.1, overlapping the
ranges selected with
(2 pushbuttons)
Frequency range selection from 0.05Hz to 5MHz in 8
decade steps.
(LED s)
Indication of selected function.
(pushbutton)
Mode selection: Triangle, Sine, Square, Off.
(BNC connector)
This short-circuit-proof output supplies a square signal
in synchronism with the output signal. It is TTL
compa-tible and has a duty-factor of approx. 50%.
(adjusting knob)
Sous réserve de modifications / Reservado el derecho de modificación
revealed on the red power button in the front centre
of the mainframe.
If the BNC sockets at the rear panel of the
HM8001 unit were in use before, the BNC cables
should be disconnected from the basic unit for
safety reasons. Slide in the new module until the
end position is reached.
Before being locked in place, the cabinet of the
instrument is not connected to the protective earth
terminal (banana plug above the mainframe
multipoint connector). In this case, no test signal
must be applied to the input terminals of the module.
Generally, the HM8001 set must be turned on
and in full operating condition, before applying any
test signal. If a failure of the measuring equipment
is detected, no further measurements should be
performed. Before switching off the unit or
exchanging a module, the instrument must be
disconnected from the test circuit.
Adjustment of the positive or negative offset voltage.
This DC voltage can be superimposed on the output
signal. The max. offset voltage is ±5V (o.c.) or ±2.5V
respectively when terminated with 50 Ω.
(pushbutton)
Activates the offset function.
Ω Ω Ω Ω Ω
(BNC connector)
Short-circuit-proof signal output of the generator. The
output impedance is 50Ω, and the max. output
amplitude is 20Vpp (o.c.) or 10Vpp respectively when
terminated with 50Ω.
(pushbutton)
Two fixed attenuators, 20dB each. They can be used
separately. When both pushbuttons are activated, a
total attenuation of 40dB results. Including the
amplitude control (14), the max. attenuation amounts
to 60dB (factor 1000).
(adjusting knob)Continuous
adjustment of the output amplitude from 0 to - 20dB.
Ω