Philips PM 5132 Instruction Manual page 17

3.2.4,
15
Setting the internal sweep
— pushbutton STD BY / CONT must be set to STD BY
— adjust the sweep period with the knob PERIOD
Starting a single sweep is done by pressing the pushbutton TRIG once, the continuous sweep is
realized by setting the pushbutton STD BY / CONT to CONT. In addition to this a sweep action
can be started by a triggering pulse at the SWEEP TRIG INPUT socket. Starting criterion is the
negative edge e.g. of a TTL signal.
The SWEEP OUT socket at the rear side provides the instantaneous sweep voltage corresponding
to a distinct signal frequency for controfling an oscilloscope or x - y plotter. The voltage to frequen-
cy relationship is linear, a sweep-voltage of O V represents f+, 7. 4 sweep voltage of +5 V fstor:
Further control elements for manual controlling are the HOLD pushbutton to stop the sweep imme-
diately and RESET for resetting to fstant during the sweep.
Note: Before executing an internal sweep, disconnect all cables from the SWEEP INPUT socket.
This input is not switched off during an internal sweep.
Utric
SWEEP
TRIG
INPUT
t
f
'stop
ere fstop™ dial reading . muiltiptied by the
factor of the frequency
eis range selector
9
fstaRT 7 adiustment of FREQUENCY
Hz
ht knob
START START FREQ
sweep
range selector SWEEP PERIOD
and knob PERIOD
time
SWEEP
OUT Internal Sweep
Diagram of a sweep period with the sweep
output-voltage SWEEP OUT and the
triggering signal SWEEP TRIG INPUT.