Tascam M-300 Series, Руководство по эксплуатации и техническому обслуживанию

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7) Mic Pad
(30
dB)
With
T R I M-MIC
set as in paragraph 1 - 4. 6).
press the mic pad switch, labeled 30 dB. I ncrease
the input level by 30 dB to compensate the
inserted 30 dB pad. Confirm that the output
level at D.OUT is -10 dBV ±2 dB. After check­
ing, reset the input level to nominal -60 dBV
and the mic pad switch to the "off" position.
8) OL (Overload) I ndicator
(MIC I N
->
INSERT Send Contact)
With T R IM-MIC set as in paragraph 1 -4. 6),
increase the
MIC IN
level and confirm that the
O L
indicator turns on at + 1 7 dBV at the I
N
­
SERT Send Contact and turns off at +13 dBV.
I
N S
E
R T
T
R S
T - Tip, send signal
R - Ring, receive signal
S - Sleeve, ground
SEND
9) Channel Assign Switches and PAN Controls
(MIC I N -> PGM OUT 1 - 4, STEREO OUT·
PUT L
&
R )
Checking the PGM OUTs ( 1 ·4) and STEREO
OUTPUTs ( L & R) should be performed with
the MIC IN circuits set as in paragraph 1 -4. 6).
Confirm that nominal output levels are obtained
1
-
7
(+4 dBm at XLR connectors, -10 dBV at
RCA
phono jacks) when
PAN
is turned fully left
(assignment to ODD PGM/STEREO L busses)
and fully right (assignment to
EVEN PGM/
STEREO R
busses). Also, confirm that the read­
ings decrease 1.5 - 3.5 dB from nominal level
when
PAN is
set
to
the center position.
L R
ODD
EVEN
1 -5.
MON(itor) OUT L
&
R
With the output level at STE REO OUT L & R,
EXT IN
1 &
2, MONO OUT, E F F ECT OUT­
PUT, AUX OUTPUT 1
-
4 (AUX 3, 4 on 312
and 320 only) set as in paragraph 1 - 1 , confirm
that each of those output signals appears at the
MON OUT
jacks when the relative MON select
switches are pressed. Use the MONITOR level
control for a 0 dBu read ing at 1 /4" phone jacks
and -10 dBV at RCA phono jacks. When the
PF L
and
A
F
L
switches are depressed, the
monitor signals above are interrupted and the
channel signal and the PGM signal, respectively,
are sent to the
MON
OUT jacks passing through
the
SOLO
level control.
Indicators Monitor Sources
PFL LED lights red.
Pre input .fader
PFL
E F F ECT RTN input
SOLO LED lights red.
EXT SOLO input
AFL
AFL LED
lights red.
PGM OUT 1-4
SOLO LED lightsred.
Confirm that all the monitor signals are inter­
rupted when the T /B (TalkBack) switch on
M-312/M320 is depressed.