BRUEL & KJAER 1022 Instructions And Applications page 8

COMPRESSOR INPUT:
COMPRESSOR VOLTAGE:
LOAD:
MATCHING IMPEDANCE:
ATTENUATOR:
ATTENUATOR OUTPUT:
MECHANICAL DRIVE
CONNECTION:
8
For connection of the signal from the
regulating transducer when automatic
regulation of the B.F.O. output is re-
quired. Input impedance
25
kU Maxi-
mum range of regulation 50 dB.
Logarithmic potentiometer for control
of the output voltage of the instrument,
when compressor loop is applied.
Output terminals of variable output im-
pedance. Controlled by Matching Im-
pedance knob. The right-hand terminal
is grounded.
6-60-600-6000il
indicates the mini-
mum load impedance for each switch
position. Another position feeds the
output through the Attenuator.
When "Matching Impedance" is set to
"Att" the output signal can be attenuat-
ed in ten accurate steps of 10 dB. The
other values indicated by the knob posi-
tions refer to the RMS voltage (mV)
available at full scale meter deflection.
Output signal fed through this socket
when "Matching Impedance" set to
"Att". A grounding socket is placed be-
side it.
Located on both sides of the instrument
are sockets for the connection of an ex-
ternal mechanical drive for automatic
frequency sweep. The shaft connection
fits the Flexible Drive Shaft UB 0041
which forms the mechanical link be-
tween the B.F.O. and the Level Recor-
der 2305.