Tascam M-300 Series, Operation & Maintenance Manual

Page: 75 / 167

1 . LEVEL SETTING AND OPERATION CHECK
"0 dB" reference voltages:
0 dBV is referenced to 1 Vrms.
0 dBm/0 dBu is referenced to 0.775 Vrms.
1 - 1 .
MASTER FADERS AND POTS
Connect a -10 dBV, 1 kHz signal to the mput
jacks l isted in the table, and by adjusting the
MASTE R faders and MASTER pots of the
channels being checked, confirm that the
relative outputs provide nominal output level
signals.
Input Jacks Controls
PGM 1
PGM 2 PGM Master Faders between
7-8
PGM J
on the scale
PGM 4
Stereo Master Fader L between
7-8
on the scale
R
Stereo Master Fader R between
SUB IN
7-8
on the s c a l e
L and
R
MONO Master Fader between
7-8
on the scale
EFF E F F ECT M
a
st e
r
Pot
AUX 1 AUX 1 Master Pot
AUX 2 AUX 2 Master Pot
AUX J* AUX 3 Master Pot
AUX 4*
AUX 4 Master Pot
EXT SOLO SOLO level pot
EXT 1 and EXT 2 in the
MONitor select
switch
rack
EXT IN
1
(L
&
R)
MONITOR level pot
EXT IN 2 (L
&
R)
PHONES level pot
•
M-31 2/M-320 only.
1-2.
VU METERS
Check that the VU meters indicate "0 VU"
when PGM OUT ( 1 -4) and STEREO OUT
(L & R) provide the nominal level readings. I f
the meters do not indicate "0 VU", adjust VRs
with a slot blade screwdriver inserted into an
access hole located above each meter.
1
-
1
Output Jacks Output Nominal
Levels
PGM OUT 1
PGM OUT 2
+4 dBm at XLR connectors
PGM OUT 3
-1 0
dBV
at
RCA
phone jacks
PGM OUT
4
STEREO OUT L
+4 dBm at XLR connectors
-10 dBV at RCA phone
STEREO OUT R
jacks (stereo)
0 dBu at
1
/4" phone
MONO OUT
jack (mono)
E F F ECT OUTPUT
AUX 1 OUTPUT
0 dBu at 1 /4" phone jacks
AUX 2 OUTPUT -10 dBV at RCA phono jacks
AUX 3 OUTPUT
AUX 4 OUTPUT
SOLO OUT
-10 dBV
MON OUT L & R
0 dBu 1/4" phone jacks
- 1 0 dBV at RCA phono jacks
Headphone
output
Max.
level 1 .5 W
+
1 .5
W
(8
ohm impedance)
1-3.
PEAK LEOS
Peak LEOs are preset to l ight at +1 1 VU and
extinguish at +8.5 VU.
I ncrease the input level by 1 1 dB from -10 dBV
to +1 dBV without altering the settings in
paragraph 1 -1 and check to see that the peak
LEOs light at a +1 1 VU reading.