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SM5060-2
User Manual
setting . The set frequency N (DC voltage not included) can be selected at will.
o
Computation N = N + A.U
U = (N-N )/A
:
or
o
o
N
N
o
= digit display without voltage U ;
= digit display including
voltage U
U
A
= ± voltage at the FM input.
;
= 740 (digits per volt).
It should be noted that only the displayed digits are valid; the decimal point is not
taken into consideration (e.g. 100.0 1000 digit). The max. frequency (2 MHz)
cannot and "000" should not be exceeded. Any zeros preceding the decimal point
are dropped.
Limits :
N = 3000
N = 300
If the highest displayed number is
and the smallest
, then
o
U
+3.6 V
will be
max. The frequency increases by a factor of 10.If the smallest
displayed number is
(lower number are possible, but inaccurate) and the
N = 30
highest
, then
will be
The frequency changes by a factor of
N = 3000
U
- 4 V max.
o
100.The frequency change is linear as a function of the voltage
and has the same
U
value in all ranges.
This mode can be used in applications where the periodically required frequencies
are to be set , This will eliminate the repetitive setting of frequency from front panel
via FREQUENCY set knob.
Instead set the frequency setting knob to min. and fed
the equivalent DC input from VCF (EXT FM in) at the rear panel, the desired
frequency will be available. Using multiple DC voltages , which may be selected by
a switch or electronically switched , may program a set of frequencies. Such
applications exists in production departments , where signals at several specific
frequencies are required for various tests. FSK (Frequency Shift Keying) signals
also may be generated in this manner.
DC Offset
When the switch
OFFSET is depressed, a DC voltage can be superimposed on
the output signal. The maximum offset voltage with open output is ± 5 V. If large DC
offset is added or a large signal is added with DC offset ,make sure that the desired
combination is obtained without clipping. An oscilloscope may be used for proper
setting of DC offset addition.
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