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A.F.C.:
.
FREQUENCY RESPONSE:
"Linear"
"Selective"
"Bandwidth Comp."
METER AND RECORDER:
"Analyzer"
"B.F.O."
FREQUENCY SCALE:
Automatic Frequency Control phase
detector circuit. The A. F .C. is active
only in the four lower bandwidths (3.16
to 100Hz), see section 5.5.
The input signal is not filtered and the
response is flat
±
0.5 dB between 2Hz
to 200kHz.
The input signal is filtered either by the
analyzer or by an external filter.
Allows bandwidth compensation for
power spectral density measurements.
Compensation
...1.
B
=
Bandwidth
JB'
(Hz).
If the button is depressed, the output
signal voltage from the analyzer is indi-
cated on the meter. The output of the
analyzer is fed to the RECORDER out-
put:
If the button is depressed, the output
signal voltage from the B.F.O. is indi-
cated on the meter. The meter full scale
deflection is indicated by the position
of the B.F.O. ATTENUATOR switch.
The output voltage is fed to the RE-
CORDER output:
The outer scale is logarithmic and ex-
tends over 3 decades from 20Hz to
20kHz (see also FREQUENCY SCALE
RANGE SWITCH).
The inner scale is linear from 0 Hz to
20kHz.
11
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