Ope, R Ation; General; Synchronization - BRUEL & KJAER 1022 Instructions And Applications

OPERATION OF
THE INSTRUMENT COMBINATIONS
General.
If the instrll!ments are mounted in a rack, all electrical and mechanical
connections are made internally. When the ins truments are used in individual
cabinets, interconnection must be made via control Cable AQ 0002 for remote
control from Level Recorder to Spectrometer and a flexible shaft UB 0040
for the mechanical tuning arrangement for B.F.O. Type 1022. The logarithmic
frequency scale of the B.F.O. 10:22 allows it to be completely synchronized
with the Spectrometer.
Synchronization.
To fully synchronize the three units the following sequence of operation
is recommended. Switch on the power of each instrum· e nt and connect the
RECORDER terminal of the Spectrometer to the INPUT terminal of th e
Level Recorder, then calibrate as follows:-
B.F.O. 1022 Section.
Calibrate the B.F.O. as in "Calibration " under Operation on page 14.
Spectrometer.
1. The control knobs should be set as follows: -
INPUT SWITCH: "Direct"
METER RANGE ~
METER SWITCH:
RANGE MULTIPLIER:
" Ref."
"Fast", "RMS"
" X 1, 0 dB"
FUNCTION SELECTOR: " Linear, 2- 40ooo c/ s"
Control knobs not mentioned may be in any position.
2. The meter should now show a deflection to the red mark on the
scale. Possible deviations being corrected by the potentiometer
marked SENSITIVITY - AMPLIFIER INPUT on the front panel ,
with the aid of a screwdriver.
Level Recorder.
(N.B. In this case a 50 dB potentiometer is used. For other ranges refer
manual for Level Recorder Type 2305).
Set control knobs to the following poSiitions:-
1. POTENTIOMETER RANGE dB to "50".
2. RECTIFIER RESPONSE to " RMS " .
3. LOWER LIMITING FREQUENCY to "20".
4. WRITING SPEED:
50 mm paper: 250 mm /sec. (large figures ).
100 mm paper: 500 mm/sec. (s mall figures).
5. PAPER DRIVE to "stop" and "forward" positions.
6. MOTOR to "on".
7. Set INPUT ATTENUATOR to
" 10".
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