Table of Contents
Advertisement
FREQUENCY SCALE RANGE
SWITCH:
FREQUENCY INCREMENT:
FREQUENCY ADJUSTMENT:
SWEEP CONTROL:
12
The central knob enables a mechanical
sweep (manual or external drive) to be
made. The standard weighting network
filters A, 8, C and D, or a linear re-
sponse (2 Hz- 200kHz) may be select-
ed by the scale pointer, unless an exter-
nal filter is selected.
A six position switch which selects
either the linear or logarithmic (inner or
outer) frequency scale, and gives the
choice of three scale factors, x 0.1, x 1
and x 10.
A ten-turn potentiometer which allows
fine adjustment around a selected fre-
quency. Three lights above the knob
indicate whether the actual frequency is
above, below or equal to the frequency
selected on the scale.
A screwdriver operated potentiometer
which allows adjustment of 2, 20, or
200Hz according to scale factor. For
compensation of long term drift of the
V.C.O. at low frequencies, see Sec-
tion 3.1.2.
A three position switch which selects:
a) "Ext. mech".: An external mechani-
cal drive may be used to sweep the
scale.
b) "Manual": The scale may be swept
manually.
c) "Ext. Volt.": The frequency may be
swept by an external voltage connected
at the rear panel socket, FREQUENCY
CONTROL VOLTAGE "In".
Advertisement
Table of Contents
