Sony C-48 User manual

CONDENSER MICROPHONE
c-48
OPERATING INSTRUCTIONS pase2,14
Before using the microphone, please read this manual thoroughly
This manual should be retained for f uture reference-
MODE D'EMPLOI pase 0,14
Avant toute op6ration, lire attentivement ce mode d'emploi
Conserver ce manuel pour toute r6f6rence ult6rieure.
BEDIENUNGSANLEITUNG seite 10, 14
Vor lnbetriebnahme lesen Sie bitte diese Bedienungsanleitung
aufmerksam durch. Bewahren Sie diese Anleitung zum spateren
Nachschlagen gut auf.
5
'
Microphone stand is optional.
Le support de microphone est disponible sur option.
Der Mikrofonstander ist gesondert lieferbar. @ 1980 by Sony Corporation
SONY'

FEATU RES
Microphone capsule
The C-48 utilizes two low impedance back-plates in the front and
rear of the diaphragm that can pick up even low level transient
sounds.
Directivity selector switch
Omni-directional, uni-directional and bi-directional characteristics
can be selected as required.
Pad selector switch
This switch reduces the output level of the microphone to prevent
any overload of the impedance translator resulting f rom the pick up
of extremely high level sound sources.
Two-way powering system
The C-48 operates with either an internal battery or an external
power supply.
LED indicator
The LED directivity indicator shows the selected directivity,
whether the power is ON or OFF, and the battery condition.
Microphone construction
By the use of heavy zinc and aluminum die castings in its construc-
tion, the C-48 avoids any resonance effects.
FET amp
This microphone employs a high impedance, low noise FET
amplifier, so even low volume signals can be faithfully reproduced.
TABLE OF CONTENTS
PRECAUTIONS
. The microphone should never be dropped orsubjected to anyex-
cessive shock.
o Keep the microphone away from extremely high temperatures
(above 60'C or 140'F).
o Connect the microphone cable firmly.
a The microphone and recording instruments should be turned on
thirty minutes before they are actually used. This assures stable
performance of the equipment.
.*,
2
3
!
Precautions
Parts identification . .
Powersources and operation..,, .
Battery operation
External power supply
Adiustment of selector switches. .
Tone selector switch
Directivity selector switch
Pad selector switch
Specif ications
Frequency response
Directivity
Dimensions
Block diagram
5
5
14
14
15
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2

PARTS IDENTIFICATION
PAD indicator
Directivity indicator
Tone indicator
Rear cover
Output connector
Tone selector switch
Directivity selector switch
Pad selector switch
Battery compartment
Battery ON/OFF switch
Stand screw socket
a
Cover latch

POWER SOURCES AND OPERATION
Preparation
Attach the microphone to the microhone stand
BATTERY OPERATION
Q Open the rear cover by pushing the two latches.
€) Pull out of the compartment and insert a battery into it'
Observe the battery polarity indicated on the compartment'
Battery
cover
Battery compartment
o
G) Close the compartment by pressing the rear cover.
@ Connect the output connector of the microphone and the input
of the microphone mixer etc. with the microphone cable'
@ Wnen using the microphone, set the battery ON/OFF switch to
ON. The directivity indicator will illuminate. After using the
microphone, remember to set the switch to OFF'
Notes
a An exhausted battery causes noise or harmonic distortiln
When the directivity indicator lights dimly replace the batter!'!" tn
a fresh one.
a lf the microphone is not to be used for a long time, or is operated
on an external powr supply, remove the battery to avoid any
possibility of corrosion.
o ln case of battery leakage, wipe off any deposit in the battery
compartment before installing a new battery.
EXTERNAL POWER SUPPLY
(D Connect the output connector of the microphone and the input
of the external power supply (optional Sony AC'148F or equivalent)'
€) Connect the output of the external power supply and the input of
the microphone mixer etc.
c-48
xLB-3-11C
xLR:3-12C
External power supply
XLR-3-11G MicroPhone
mixer etc.
To an AC outlet
effi*
Note
When using the microphone with the external power supply, if the
battery ON/OFF switch is set to ON, current will be drawn from the
battery. To avoid running down the battery, keep the switch at OFF'
4
TECHNICAL INFORMATION
External power suPPlY system
The C-48 can utilize an external power supply.
This system uses an external DC power source, a standard two"
conductor shielded microphone cable, and the transformer of the
C-48. The external power supply Sony AC-148F (optional) is recom-
mended for this purpose.
ln this form of powering, the supply current (positive potential) is
fed to the center'tap of the power supply transformer. and is con'
ducted symmetrically via the "a" and "b" conductors whose
original f unction is to carry the microphone output signal. After this
current loins at the center of the resistor connected between the
conductors, it tlows from that junction to the m crophone. The
return current (negative potential) llows through the shield. While
the phantom powering DC current is conducted via the audio signal
wires of the microphone, there is no adverse effect on the signal,
since no DC voltage difference exists between the "a" and "b" con'
d uctors.
Th s 3cn/ering svstem ls also usab e v/'i' ::-:' '. ces of
- -'.:-.':: -:.---: :- : -. - : :l '''^:" ^: :' Je
ca-.ea:al '.: z'' a'-^a' .":= -' - :-::':ne such as ::'::'rseT.
dynarc. c'.ccc-. ",:-:-: :ausing noise, inter'i':-:= or
datd. ^.:'.. - _: rn. < _-:
Note
with an external power supply system, never use an unbalanced
microphone cable f or connecting to the microphone.
Cable a
AC.1 48F
Output
Shield
Power supply
transformer
Sound
wave
+
DC power source
Output transformer
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ADJUSTMENT OF SELECTOR SWITCHES SPECIFICATIONS
The tone selector switch, the directivity selector switch and the pad
selector switch are located inside the microphone under the rear
cover.
Pad selector switch
Directivity selector switch
i*Tone selector switch
When changing the settings, be sure to turn off the amplif ier to pre-
vent microphone output noise that could damage the speaker or
create a disturbance.
TONE SELECTOR SWITCH
The tone selector switch adjusts the low frequency response.
V position reduces the response in the low frequency range. When
some room acoustics happen to emphasize low frequencies,
resulting in "boomy" sound pickup, or when a microphone is plac-
ed in close proximity to the source, causing a "proximity" ef fect (a
boosting of the bass response), set the selector switch to V. This
position is preferable for closemiking of voice, and in situations
where air conditioner noise or cthar sources of 'c,.i'f.e:;e1a', are
en co u nt ered .
Generally keep tne se ecior st'i tcn lc l',,1 {or a m-s a sollrce.
-- See Tone, Pad ON frequency response'on page 14.
DIBECTIVITY SELECTOR SWITCH
The desired directivity can be obtain by setting the directivity selec'
tor switch.
When the power is turned on, the directivity indicator will be il-
Iuminated and the directivity in use can be checked.
C : Omni.directional
Sounds from the all directions are picked up with equal level
Q : Uni.directional
Sounds f rom the f ront are emphasized.
8 : Bi-directional
Sounds from the front and the rear are emphasized.
PAD SELECTOR SWITCH
The pad selector switch reduces the output level of the microphone
to prevent any overload of the impedance translator resulting from
the pickup of extremely high level sound sources. Normally set the
selector switch to 0, and when the recording of high sound level is
necessary, set this to 10.
* See "Tone, Pad ON frequency response" on page 14.
General
Type Condenser microphone
Semiconductors 2 junction FETS,
4 transistors,
4 diodes,
3 light-emitting diodes
Battery IEC designation 6F22
Microphone output connector
Cannon XLR-3-12C type
Mounting thread PF f,
Dimensions 54x229x40 mm (w/h/d)
(21/ox91/'x 1sf inches)
Weight approx.5509 (1 lb 4oz)
Finish Satin color coating f inish
Supplied accessories Carrying case
Stand adaptot (PF 1/, to NS %)
Perlormance
Frequency response 30Hz-16,000H2 (See page 14)
Directivity Selectable uni-directional, omni-directional
or bi-directional (See Page 14)
Output impedance 150ohms *2070, balanced
Output level (deviation +2dB)
Open circuit voltage*1: -61.0dB (0.89mV)
Ef f ective output level * 2: -38.8 dBm
*10d8=1V/sbar 1.000H2
*'? 0dB= 1rn!V1 10rbar 1.000Hz
teac.r-'.renaed oad moedance is more
:nan 3 konms.
Power requirements for battery operation
Normal operating voltage: 9V
Minimum operating voltage: approx. 5.5V
Current drain: Less than 5mA (at normal
operating voltage)
Battery life: Approx. 50 hours with Sony
super battery 3-006P
Power requirements for external power operation
Norma operating voltage: 48V
nterna mpedance: 3.4 kohms
Current drain: Less than l mA
Noise Level Signal-to-noise ratio:More than 52dB
(1,000 Hz, 1f bar)
lnherent noise: Less than 22dB SPL
(0dB=2x10apbar)
Wind noise*1: Less than 47dB SPL
lnduction noise from external magnetic
field*2: 0dB SPL/m gauss
* 1 Wind noise is the value measured by applying a wind velocity of 2 mi sec. (6.6 f t./sec.)
from all directions to the microphone. The mean value is taken and converted to the
equivalent input sound ievel. 0dB=2x10-albar
*, The external magnetic field induction noise is measured with the microphone place in
an alternating magnetic f ield of 50 Hz, 1 milligauss. The maximum noise value is taken
and converted to the equivalent input sound level.0dB=2x10aybar
Maximum sound pressure input level (at 1,000H2, 1% distortion)
more than 128dB SPL (Normal)
Dynamic range Approx. 106d8
Envi ron mental temperatures
-20'C to +60'C (-4'F to +140'F) for storage
0"C to +60'C (+32"F to +140"F) for operation
+
5
Design and specifications subject to change without notice

FREQUENCY RESPONSE/
REPONSE EN FREQUENCE/
UeenTRRGUNGSBEREIcH
FREOUENCY RESPONSE
REPONSE EN FREQUENCE
U BERTRAGUNGSBEREIcH
Om n i-direct ional
Omni-directionnel
N ierenfdrmig
DTRECTTVtTY/
DTRECTIVtTE/
RICHTCHARAKTERISTIK
DIFECTIVITY
DIRECTIVlTE
flICHTCHAFAKTERISTIK
0'
15
t6
t5
16
I5'
30' 30'
50
45
50'
-10
-20
-30
+10
60
m-!
- " I -10
83e ro
3P= 30
+10
60
6-!
- o - t0
2P,E-zo
#&= 30
+10
o0
@o!
.s:;-r0
3 B'q
ca!-)n
oco--
ooE
&P=,30
15
s0'
20
Uni'directional
Un i'directionnel
Kugelfdrmig
2a
Bi-directional
Bi-directionnel
Achte116rmig
204
100 200
50 100 200
Frequency in Hz
Fr6quence en Hz
Frequenz in Hz
5k 1 0k 20k
2k 5k
2k 5k 1 0k 20k
lk
105
2A'
135 35'
KugellOrmig
r 50
150
30'
65
r80
0'
180
o'
15
r65
15'
r00Hz I kKz 3kHz
90
o5
20"
30
s00 1k
Frequency in Hz
Frequence en Hz
Frequenz in Hz
500 ]k
Frequency in Hz
Fr6quence en Hz
Frequenz in Hz
75
+10
0
90
7s'.
o
g@ -
.Eco
P3e
oco
ooE
EE' -
100 fz 3 kHz
--- - - 10kH2
Bi.direclional
75'
35
35'
90'
20
30'
30'
Tone, Pad ON
R6glage de tonalit6 et d'att6nuation
Klang-, Dampfungswahler: ON
20.
500 1k 2k
Frequency in Hz
Fr6quence en Hz
Frequenz in Hz
50
0',1
S
\
go"'
sl
)"= t\
14
20 50 1 00 200 5k I 0k 20k
180 65 100 Hz 1 kHz
3kH? 10kHz
60( ,--6o
\_--\ 7 s{l
il
{r
I
]y
A
I
-l
I
X
I
t-
1
'-s -
10

@
@
26a
DrM ENSTONS/DrM ENSTONS/ABM ESSU NG EN
Unit : mm
Unit6 : mm
Einheit : mm
40
34
N
@
1
N
47.5
BLOCK DTAGRAM/SCHEMA DE pRtNClpE/BLOCKSCHALTPLAN
Tone seleclor switch
Selecleur d€tona 1e
K angwahler
FET amp
Amplificaieur FET
FET-VerstArker
Ca.non XLB 3 12C type
Connecleur de sortie
Type Cannon XLB 3,12C
Ausgangsansch uB
Cannon XLR 3 12C Typ
Oulput trans!ormer
Transformateur de so(ie
Ausgan gslra.siormator t--
R
2
J
Circuit board
de c rcuit
Battery 6F22
Pile 6F22
Ballerie 6F22
Swltch
Schalter
R
Directivily seiector switch
S6lecteur de dlreclivit6
Richtcharakleristik-
Wahlschalter
15
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