Front Panel Connections; Signal Output; Trigger Input; Trigger Output - Hameg HMF2525 Handbuch

7 Front panel connections

7.1 Signal Output

Fig. 7.1: Outputs on the front panel
The signal output of the HMF2525 / HMF2550 has an impedance
of 50Ω and can be turned on or off with the key OUTPUT
output is short-circuit proof and protected against short-term
applied voltages of up to ± 15V (DC and AC peak).

7.2 Trigger Input

The HMF2525/2550 offers different operating modes. In addition
to the standard mode „free-running" (continuous), signals may
be generated triggered or gated. The selection is performed in
the BURST or SWEEP modes. After turn-on the instrument will
be in the free-running mode.
In gated mode the output signal will be gated by a signal
applied to the TRIG INPUT connector
operating mode is asynchronous. The phase of the output signal
can be any when gated because the signal will be continuously
generated. If the gate signal is HIGH (TTL) the output will be
activated, if it is LOW it will be off.
In triggered mode the trigger is also applied to the TRIG INPUT
connector . A trigger signal may be also a command TRG sent
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via the interface. This operating mode is synchronous, i.e. the
triggered signal will start at its beginning i.e. at zero. One or
several periods will be generated depending on the length of
the trigger signal. This way bursts may be generated, but the
number of cycles per burst is not programmable.
In case the sweep function is activated, a trigger will generate
just one sweep, after completion the function generator will
wait for the next trigger. During the waiting period the signal
frequency will be equal to the start frequency.
Fig. 7.2: Output signal controlled by a GATE signal
. The
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on the front panel. This
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F r o n t p a n e l c o n n e c t i o n s

7.3 Trigger output

The HMF2525/2550 can also generate a trigger signal in sweep
mode when the swept frequency reaches a preset marker frequen-
cy, this trigger is available at the TRIG OUTPUT connector

7.4 USB connector

The USB connector on the front allows software updates of the
HMF2525 / HMF2550 fi rmware as well as entering arbitrary
functions in the CSV format.
.
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Subject to change without notice