BRUEL & KJAER 2010 Instructions And Applications page 17

FILTER SENSITIVITY
ADJUSTMENTS:
POL. VOLTAGE:
EXT. INSERT VOLTAGE:
TO 2020:
EXT. FILTER:
"To lnput"/"To Output"
FREQUENCY CONTROL
VOLTAGE:
Six screwdriver operated potentiometers
for adjustment of the transmission level
of the filters. (See Preliminary adjust-
ments and calibration, Section 3.1.4).
Sockets for measurement of polariza-
tion voltage. Measurement should be
made with an external D.C. voltmeter
having a rating of at least 20 kQ/Volt.
The ground socket is on the right.
Sockets for input signal from external
generator for insert voltage calibration
of condenser microphones. Load imped-
ance 10 kQ. The socket on the left is
ground.
These sockets supply control voltages of
120kHz, and 100- 120kHz for the
B
&
K Heterodyne Slave Filter
Type 2020. The output impedances are
100
n,
and the output levels are
approximately 200 mV. Only the scale
factor "x 1" on the 2010 is usable. (See
Section 6.3).
These sockets are for connection to an
external filter and accept the standard
B & K plugs JP 01 01. The input imped-
ance is approx. 150 kQ, the output
impedance is less than 25
n.
The input socket ("In") is for connec-
tion of a DC voltage between 0 and
10 Volts for control of the V.C.O. when
the External voltage mode ("Ext.
Volt") is chosen on the SWEEP CON-
TROL (front panel). The output socket
("Out") delivers:
15