Crown OC-150A - Quick Summary of OC-150 A Functions; Meter Functionality and Calibration; Meter;Monitor Switch Operation

QUICK SUMMARY
The GrC-15QA is an GIUTPUT Ca3faaTFSBt CENTER. It is conneded in a hi-fi sl/slem
fier(~) and the speaker sys.$.em(s),
P. The meters rgad ~i%.ser VU in dB, ar rms equivalents a4 true peaks, in mEb,
2. Output fmm one, two, or three amplifiers can be monitored on the meters, one at a time, switch selected.
3. Up to three spaker systems, in any combination, are switch-selected fram Amp #1 input
4. From input #2, three headphone outputs are evailable; the rear panel electrostatic strip is direct; front panel
pcks 1 and 2 are switch-selected and fed through the attenuator switch on the rear panel.
Details blow:
A, HOLD BMnE COMTWBCS
O, MmEWMOWfTOR SWITCH
1,2 -deternine haw larag the metem wifl hold a 1 --VUPPEAK - when depressed, meters read
vo!bge reading when in the peak mode. rms eguivalenb af true signal peaks, ira volts,
Variable from rera %a infiniw.
When disengaged, meters act as 'BbU meters.
8, METERS
Meters calibrakd i~ dB,
1,2 -can be used $0 monitor output signal ievels,
eithgr in VU 01" PEAK, Meter scales are
calibrated in dB and volt$, CAUf Never
adjust the mechanical adjust screws on the
meter Branti since they are adjusted as pae
of -$Re calibrathn procedure.
C. HMDPHCJaNE JACKS
1,2 ---connscted through headphone ssiector
switch and the @$%nuator switch to Amp #2
input, tf inbnded for use with Amp WP input,
an external jumper must be used bebeer?
Amp #1 and Amp #2 inputs, $&e Caution,
Page 42
2 --AC hl N E/AU D IO --- when depr~ssed, meters
are connected t:s monitar the AC rine ~~Ibge,
in volts* (The RANGE SWiTCM, E, will have %a
h swit~ hed ts the 146V scale to properly ad -
just the meter sensitiviv for the AC fine,)
When disengaged, the meters are canncctd
to moa itar thc noma f audio pragrams. NOTE:
BOTH metes display the Iina voltage when
AC LINE is dspressed* Additionally, when the
OC-lSQA is connected far 246VAC speratisn,
the two meter readings must be added (or
either meter multiplied by two) far%h@ actual
valtage read irng. St igRt variations ar@ normal
due to circuit bler~nees,