Nagra IV-S User manual

CHAPTER I"INSTRUCTION MANUAL"
TABLE OF CONTENTS
Please refer to your instruction manual:
May 1991
•
•
Nagra IV-S
Nagra IV-S TIME CODE
No 20 06 004 161
No 20 06 007 161

June 1988
CHAPTER I"INSTRUCTION MANUAL"
TABLE OF CONTENTS
Page No.
1.1 Introduction I1.1-1
1.2 Power supply:
1.2-1
External power supply
1.2-1
1.3 Danger of reverse polarization
1.3-1
1.4 Controls: Description and use 1.4-1 to
1.4-8
1.5 Connectors 1.5-1 to
1.5-4
1.6 Tape speed and standard selection
1.6-1
1.7 Loading atape on the recorder
1.7-1
1.8 First time operation: 1.8-1 to
1.8-2
Recording 1.8-1
Recording with microphone 1.8-1
Recording a line signal
1.8-2
Playingback a recorded tape
1.8-2
Working with headphones 1.8-2
1.9
Specifications 1.9-1 to 1.9-5

1.1 INTRODUCTION
The Nagra IV-S was introduced originally in 1971. It is a portable 6.35 mm (1 /4") analogue audio
tape recorder designed for high quality music recording, cinema and television applications.
Many mechanical and electronicmodifications have been made to the machine sin
ce its release, to
adapt it according to modern day requirements. Despite all these modifications, the machine
remainsremarkably similar to the original. The last major development was made in 1964 when the
SMPTE IEBU 80 bits centre-track time code was added.
The Nagra
IV- S can be delivered in three different v er sions all of which are available in eith er NAB
or CCIR equalization. These versions are as follows:
N05-L SP
N05-L
N05-T C
Non pilot
Pilot
Time code
Each version has three speeds: 38 crtvs, 19
cmJ s and 9.5 c mJs (15, 7i and 3 -1 ips) with the
following standards: NAB, CCIR and NAGRAMASTER (at 15 ips only).
The Nagra IV
-S is a stereo recorder with two 2 mm audio tracks (2.75 mm tracks on the
NQ8-lSP non-pilot machines) and a central track for pilot or time code uses, depending on the
machine type.
The two audio channels may be used with either the two internal mi cr ophone pre-amplifiers
(switchable between Dynamic, T power and Phantom power) or with a current line input. via the
QCSE cable. The two potentiometers on the front panel may be mechanically "GANGE
D" together
for easier
co ntrol, by moving the small white lever located on the green control.
The NAGRA
IV-S also contains a switchable limit er , a built-in l oudspeaker ,prov ision f or
connection to an external noise reduction system and an internal reference generator for line up,
and calibration purposes.
Optionally the machine may
be fitted with either the NAGRASYNC pilot option or the SMPTElEBU
80 bits time code option.
The machine may also be powered from either an external supply
ATN-3 or internal batteries.
(See page I 1.2
-1 ).
The
IV-S may also be used with the DGB 10" reel adaptor, to allow the use of larger reels f or
longer recording and playback.
June 1988 I 1.1-1

1.2 POWER SUPPLY
All models of the NAGRA IV- S may be powered by an external power supply (ATN -3) or
alternatively by internal batteries. The I V-S will accept voltages ranging from -, 1 V to -3 0 V with
peaks of up to -3 5 V.
The batteries are placed in the bott om of the machine and the polarity is marked inside the
compartment which is opened by turning the two fasteners with a screwdriver or a small co in. All
the batteriesMUST be orientated in the same direction as indicated on the base of the battery
compartment.
The NAGRA
IV-S houses twelve 1.5 V ce lls having a maximum diameter of 33.5 mm and a length
of between 59 .5 and 62.5 mm. The cells manufactured under the following standards are generally
acceptable: CEI R-200. ASA "D " and L9D .
It is important to remember that corrosive material can leak out of flat batteries, causing severe
damage to the recorder, and therefore it is recommended not to leave batteries in the
ma chine
during periods of storage.
The external supply is led into the machine via connector (48) on the right-hand side of the
machine. Rechargeable batteries may also
be used and can be charged using the ATN-3 C (order
no 14376) which includes the charger circuitry.
To check the state of the batteries or the external supply, set modulometer switch (12) to the
MSA TT
Mposition: in this case the red needle of the modulometer indicates the battery voltage on
the (volts Icell) scale and the green needle indicates the voltage needed by the motor.The
difference between these two readings shows the battery reserve.
When the power supplied to the machine is insufficient for normal operation of the recorder, the
rotary indicator "SPEED AND POWER" on the front panel of the machine will turn bla
ck . The
IV-S will function when the power is as low as 12 V (at 15 ips 138 cm/s) and down to as low as
10.5 V at the lower speeds. (These figures correspond to a machine in perfe
ct condition and
working at room temperature).
NOTE :Time Code machines will stop recording Time code when the batteriesbecome flat
before the audio recording is affected.
When using an external supply, selector switch (3) must
be in the "EXT" position. It mu st be in the
"SA TT "position when internal batteries are in use. It is not necessary to r em ove the batteries
when working with an external supply (and vi ce versa).
NOTE: For information on power supply to the time code circuits of the
IV-S TC refer to page
IV6 .1 -1 .
EXTERNAL POWER SUPPLY
On the right-hand side of the machine there is a 6 pin Tuchel-type T 3403 connector marked
"POWER PACK". The
co rresponding plug is the T 3400 /1 .
The connections are as follows:
pin 1 =Battery negative
pin 2 - Chassis (positive)
pin 3 =Pilot playba
ck output
pin 4 =Speed correction signal input
pin 5 =Negative external supply
pin 6 =-1 a vstabilized output.
June 1988 I1.2-1

1.3 DANGER OF REVERSE POLARIZATION
A reverse polarized power supply (negative to the chassis) WILL damage the machine. To reduce
the risk of serious damage a diode is placed in parall~ with the supply which will be short-circuited
in the event 01 reverse polarization. tf such an event occurs with normal "dry cells".they will be
raptdty exhausted and no further damage will oc cur.
On the other hand. certain accumulators are capable 01supplying suttictenl curr en t (in exc es s of 8
amperes) s uch that the intemal wiring of the machine will become hot enough to ca use its
insulation to decompose .This wil lthen Iiberats hydrochloric acKf gas which causes considerable
corrosion. " thi shappens,contact your nearest NAGRA agent immediat~y .
June 1988 I 1.
3- 1

NAGRA
IV-S TC
24 26 ® ® 28
23
19 18 17 15 16 14 12
13
50
11 4321

1.4 CONTROLS: DESCRIPTION AND USE
FRONT
PANEL
1. TAPE I DIRECT SWITCH (line and phones)
Wh en in "TAPE" pos ition, the signal is reproduced dire ctly fr om the tape.
When in "DIRECT" position, there are two posibilmes:
A. When recording. the signal is available before arriving on the tape.
B. When playing back. the signal may be adjusted by means of the level co ntrols and
co r rec ted by filter swi tc h (13).
2. TAPE I DIRECT (snap switch)
This switch affects the meter in the same way that the previous switch affects the outputs. Thus
when it is held to the left, the meterwill display the WOFF TAPE" signal whereas normally it
displays the "DIRE CT" signal.
3. POWER
SELECTION SWITCH (EXT IBATT)
The NAGRA
IV-S may be powered by either internal batteries or by an external source whi ch may
be sel ec ted using this switch. See also the "POWER SUPPLY" section of this chapter. (Page
11.2 -1).
4. MAIN FUNCTION SELECTOR (six position rotary)
STOP
TEST
RECORD
RECORD
(no limiter)
PLAYBACK
PLAYBACK
(with loudspe ak er)
June 1988
Stops the machine completely from any function. and will slightly move the
pinch wheel away from the capstan to prevent a flat being ca
us ed on the pin ch
roller. In this mode no circuits are powered (with the exception of the RAM and
REAL TIME CLOCK in machines fitted with SMPTE /EBU
lim e co de). See
section IV "TIME CODE AND PILOT" of this manual for further details.
Will power all circuits and allow level adjustment by means of rever co ntrols (6)
and (7). In this mode the motor is n ot powered. All indications of the
modulometer will be of the DIRECT input, irrespective of the position of tape I
dire ct switch (1).
Is the first of the two RECORD positions and corresponds to REC ORD WITH
LIMITER where the recording level is limited to
-+ 4dB. This level remains
constant when the input level is between
-+ 4dB and -+ 10 dB . Thus in this
position tape saturation cannot occur and distortion is avoided.
The limiter is inactivated in this position so that recordings that should be
saturated can be made. (e.g. Gun shots or explosio
ns ).
Is the first
of the two playback possibilities and corresponds to playback of the
tape to the headphones and line outputs only.
This position is exactly as above, only it allows monitoring via the internal
loudspeaker at the same time. This is also the only position of the main
function selector that permits the FAST FORWARD fu
nc tion to be perfor me d
(see page I 1.4--6).
I1.4-1

5. LIGHT (push button)
When pressed, the modulometer (and time code display on T.C. machines) Will be illuminated as
long as the button is pressed, providing there is sufficient power available to the machine.If this
button is pressed and then turned to the right the lamps will remain "ON" . This button is active
when the main function selector is in any position other than" STOP".
6. LEVEL CONTROL (rlght-green-lower track)
7. LEVEL CONTROL (Ieft-red-opper track)
These are the main level controls for the two audio channels. They may be linked (ganged) by
means of the small white lever situated on the left-hand knob (green) which activates a friction
clut ch . The 200 pbar point on each channel corresponds to an accoustic pressure of 200 pb ar on
the capsule of a 200 Ohm dynamic microphone having a 0.2 mV/lJbar sensitivity. In this case the
modulometer reading should be 0dB.
8. REFERENCE OSCILLATOR (push button)
On the lower edge of the front panel, between the left and right level control potentiometers.there
is the reference generator push button. When this button is pressed, a co mposite 1 .1 Khz signal
with a 10 Khz 9th harmonic at a level of approximately -8 dB is injected into the "DIRECT" chain
of the recorder.
The modulometer will show -8 dB. It is useful to record a short burst of this signal at the beginning
of each reel of tape so as to enable the level of the playback chain to be accurately calibrated
before the real recording is made. This also permits adjustment of the record head azimuth in the
field without test equiptment. At this point the subject of print-through should be mentioned. After a
certain period of time, a recording may be copied (at reduced level) onto adjacent turns of a tape
on a reel. This produces a perceptible echo during the silences preceeding or following astrong
sound.
It is thus recommended to leave a pause of two or three tums of tape after recording the "REF "
signal.
9. MIKES I LINE SWITCH
This three position switch is the main input selection switch. It allows the operator to sele ct
between MIG or LINE input on both channels simultaneously or " LI NE" input on channel 2 (right)
and simultaneously "MI C" input on channel 1 (left). The upper position allows "LINE" inputs to
both channels via connector (41), and the other positions allow selection between "MIC" inputs
(36) and (37).
10. NRS I NORMAL SWITCH
This switch allows the use of an external noise reduction system when connected to the lV-S via
connector (42).
When an external "NRS" system is not being used, this switch should remain in "NORMAL".
June 1988 I1.4-2

11. MONO I ST HS /STEREO SWITCH
This switch is used to select the mode
01 the audio outputs. The position 01 this swi tc h ma y only
be changed by means
of a small screwdriver, to prevent accidental modification while using the
recorder. and it selects the mode 01 the .. DIRECT" chain.
MONO
STEREO
STHS
The input of each channel is fed 10 the output of both chan ne ls.
Each input is connected to its
cor responding output.
(Stereo high se
ns itivity): As for "STEREO "but the sensitivi ty is 6 dB higher. This
position is useful when
the recording source level is very low. However.it mu st
be noted that certain characteristics of the recorder such as signa l-to-oois e
ratio and cr osstalk are not quite as good in this mode .
12. MOOULOMETER MODE SELECTION SWITCH
This is a six position rotary switch allowing different information to be displayed on the
mod ulometer .
Each position is discnbed be low:
PILOT FREaUENC Y
The red needle indfcates on the pilot scale of the modulometer the frequency of the pil ot signal
'rom +4% to -4 %, as determined by the QFMS frequency meier (if fined),between the pital
signal either recorded or played back and the internal crystal or the external pil ot reference signal
via con
nect or (44).(There will be no reading if lhe QFMS option is not lin ed).
The green needle indicates on the dB s caJe the audio channel which has the highest recording
sevet ,
DELTA l!
The red needle indicates on the %scale between 0 and 100%,the groove depth of arecord made
from recorded signals in accordance with NAB weighting, thus a 100% reading co rresponds to a
50 pm vertical
dev iation of the cutting stylus.
The green needle gives the same indication as f
or pilot frequency.
LEVEL
The red needle indicates the "DIREC T" or the "R ECORDING" level of the left cha nn el (1 ) in dB.
T
he green needle indicates the "DIRECT" or the "RECORDI NG" level of the right channel (2) in
dB.
BATT
The red needle indicates on the volt Icell scale tbe battery voltage.
T he greenneedle indicates the voltage required by the motor.
The difference between the two readingsshows the battery reserve.
TC I PILOT PLA YOACK
The red needle gives the sa me indication as lor pilot freqoe nc y.
The green needle indicates on the %scale the level of the signal recorded or played back on the
FM tr ac k. A deviation of 100% correspoods to an actual freque nc y deviation 0140 % .
On tIme code machines. the green needle indicates the time code playback jevet.
M (MOTOR)
The red n eed~ indicates on the %seale the current through the mo tor. A reading of 100%
corresponds to a current of 250 rnA through the mo lor .
The green
needle gives t he same indication as in t he pilot playback position.
June 1988 I 1.4-3

13. FILTER SWITCH
This is a six position rotary switch affecting both channels.
FLAT The machine has a linear frequency response between 20 and 20000 Hz (Direct
chain).
MUSIC A high pass filter is put in the direct chain, which has a response of -3 dB at 40
Hz.
M+LFA
SPEECH
S+LFA
ROLL OFF
This puts the MUSIC filter and LOW FREQUENCY ATTENUATION of -7 dB at
40 Hz and
-3 dB at 400 Hz into the direct chain.
This puts a high pass filter of
-3 dB at 80 Hz into the direct chain.
This corresponds to the SPEECH filter and LOW FREQUENCY ATTENUATION
of
-7.5 dB at 80 Hz and -3 dB at 400 Hz.
This position gives the direct chain strong low frequency attenuation,
-10 dB at
100 Hz and
-3 dB at 400 Hz.
14. MODULOMETER
This two needle meter is the visual indication of many functions and levels of the machine. The
modulometer displays information according to the position of mode selector switch (12). All IV-S
modulometers are fitted with two small lamps which will light up the display when switch (5) is
pressed. The right-hand lamp will also light up the time code display, when the keyboard is out, via
a small lens in the bottom of the modulometer on the time code version of the recorder.
The modulometer has 4 scales:
1. Recording level in dB
2. Frequency deviation in %
3. Groove depth and motor supply current
4. Battery voltage (volts / cell)
15. TC IPILOT INDICATOR
This rotary "SASS" type indicator shows a white segment when the frequency (in the case of a
pilot machine) and the amplitude of the time code / pilot signal are correct.
NOTE: This only indicates the presence of a correct signal being fed to, or coming from the
head, and does not guarantee correct recording of the signal. This should be checked
by switching the modulometer to TC / PILOT playback (this does not function in the
RECORD mode). In the case of a time code machine, the signal should also be verified
by means of the display on the keyboard, because both the previous methods will show
a signal even though the time code generator may have been stopped and the same
time code will be recorded over and over again.
This indicator functions in all modes other than test.
June 1988 I
1.4-4

16. SPEED AND POWER INDICATOR
This rotary "SASS" type indicator gives a quick visual indication that the machine is functioning
correctly and will indicate a while segment when this is the case. and will tum black whenever any
of the lollowing conditions occur:
- Power
suPP'Y voltage (batteries or elClem aJ )becomes insufficient for correct operation of
t be ma ch ine.
-The mo tor cu rrent reaches its maximum limit. in this case voltage and speed stabilizer
cir
cu it A22. requires the motor to run faster. but this is not possible because the automatic
current limiter circuit has been activated. (If this
oc cu rs during normal operation. then
contact yournearest NAGRA
agent)
-Tachometric WOW and fl UTTER is out of tolerance. (Contact NAGRA agent).
Thus. when a white segment is indicated,
the operator can be absolutety sure that the power
supply is sufficient, that the
mo lor current is correct, and that the tape speed is within tolerance.
17. HEADPHONES OUTPUT
This 1/4" jack type socket (type 297) is the headphones output socketaccepting headphon es with
an impedance of anything from 25 Ohm to 600 Ohm. (Optimum value is 2 00 Oh m).
18. HEAOPHONES VOLUME CONTROL
This small potentiometer is adjustable using a screwdriver and adj us ts the level led to
headphones output connector (17).
Position 1 is the minimum and position 6 is the maximum.
19. HEAOPHONES MOOE SELECTOR
This is a six position rotary switch allowing the operator to select the signal which is sent to the
headphones connector. It selects between CUE channel (FM centre track), left audio channel, right
audio channel, mono or stereo. The first position of the selector is "OFF".
June 1988 I 1.4-5

TAPE DECK
20 .TAPE SPEED AND STANDARD SELECTOR
This is a four position r ot ary switch permitting the selection of the speed and standard of the IV- S
in both r
ec ord and playback.
Possible settings are:
3 -1 Ip S(9.525 cm /s) NA B/CCIR
7t IpS (19 .05c m/s) NAB /CCIR
15 IpS (38.1D cm /s) NAB /CCIR
15 IpS (38. 10c mls) NA GRAMA STER
F or best quality recordings the 15 ips speed is rec omm ended. The 15 ips NAB ICCIR position is
chosen when the recorded tape is to be played back on any machine other than a NA GRA
T·AUDIO or NA GRA IV - S.
Howev er ,when this is n ot the case it is recommended to use the NAGRAMASTER position whi ch
has a different equalization and gives a bett or signa l- t o-n oise ratio.
For normal recordings. the 7tips speed is supplied. The 3i- ips speed is available for those cases
where the length of recording time of the tape is m
or e critical than the actual quality of t he
rec or ding.
21. BIAS SELECTOR
This switch makes it possible for the operator to modify the bias voltage using a s ma ll screwdriver
when recording on special tapes tor which the machine has n
ot been calibrated. Each pos ition of
this switch corresponds to a bias variation of S%.
22. PLAYBACK EaUAlIZA TION SELECTOR
This switch (also adjustable with a small screwdriver) offers the possibility to reproduce tapes
recorded using the CCIR standard equalization on a machine that has been
ca librated to the NAB
standard eq
ua lization, and vice versa.
23. REWIND AND FAST FORWARD SWITCH
REWIND
REW. 444
FAST FORWARD
~~~::'N~
is possible with main selector (4) in any position other t ha n STOP ,
assu
mi ng pinch roller lever (32) is in the fully open position.
is possible only with main function selector (4) in the playback (with
loudspeaker) position and pi
nc h roll er lever (32) fully engaged.
The
ce ntral position of this switch is OFF and ttus is the position that the switch should be in
whenev
er the machine is not required to spool. Keeping it in this position will prevent accidental
spooling of t
he tape when opening the pinch roller gate or playing back a rec or ded tape through
the internal loudspeaker.
24. &34. TAPE REELS
The IV- S can be used with reels up to a maximum diameter of S" (127 mm ) with the ptexi-qfass lid
closed, or up to 7" (178
mm ) with the lid open. However, if the aSE T option is fitted to the
machine the
7" (178 mm) reels may be used with the lid closed.
If it is necessary to use reels of up to 10" (2S4
mm ), then the aGB large reel adapt er may be
used. See chapter V of this manual.
June 1888 I
1.4-6

25. &33. TENSION ROLLERS
These two rollerskeep the tape tension constant and ensure correct tape ha ndling and
pos itioning. During normaluse neither of these two rollers should be at ei ther e nd of its travel. If
this is the case refer to the MECHANICAL CALIBRATION section of this manual (section
II Serv i ce
manual, page II 2. 3- 1).
The two roll
er s can be replaced by either the OT IM or OLEN tape measuring rollers. T he OTIM is
supplied in t
he place of the tak e-u preel te ns ion roller as standard equip me nt. OLEN Instead of
OTIM optional. (
To be stated when or de ring).
26 .ERASE HEAD
This is a full track erase head. It means that it is not possible to record o ne channel on the IV- S
while preserving the original recording on the other channel. This also includes the
ce ntre track
wh
et h er Time Code or FM pilot.
27. STROBOSCOPE ROLLER
This roller comes in two versions: 50 Hz (CCIR machines) and 60 Hz (N AB machines). Using this
roller, it is possible to ch
ec k that the machine is running at the correct speed, eit he r in record or
playback. This works at all speeds and uses the stroboscopic effect when
ev er a ma ins po we red
lamp is shone upon it. When at the correct speed, t
he bars on the roll er should appear stationary.
28. RECORDING HEAD
Two channel audio recording head.
29. TIME CODE I PILOT HEAD
Centre track head used for both recording and playback, of FM pilot, CUE and SMPTE I EBU time
code,
acco rding to the type of machine.
30. PLAYBACK HEAD
Two channel audio playback head.
31. CAPSTAN SHAFT
Tape main drive.
32. PINCH WHEEL AND TAPE GUIDE CONTROL LEVER
This lev er engages and disengages the ta pe from the heads and mot or capstan shaft. It also
moves the stroboscope roller and mobile tape guide In and out, to allow easy loading of the tape.
Wh en it is in t he open position, rapid rewinding is possible. (This lever should neve r be left in the
openposition for long periods of time as this may cause a
"FLAT " on the capstan sha lt "0 "ring).
33. TAPE TENSION ROLLER (OR TIMER) (s •• 25)
34.
TAKE-UP REEL (s ee 24)
June 1988 I1.4-7

35. EQUALIZATION ADJUSTMENT POINT (aee Chapter II eervtce manual)
POSITIONS 36 TO 09 SEE CONNECTORS (Pages I 1.5-1 to 1. 1.5-31
50. KEYBOARD
This is the small sJide-out control panel for the IV -S time code machines. It allows sening and
mod ihcation of all lime code functions (except frame rate). For further d el ails see "TIME CO DE
AND PILOT"section IV
of this manual.
51. LIQUID CRYSTAL DISPLAY
This is the display tor time code, user bits and status of the IV-S TC (See"TIME COD E AND
PILOT" section IV of this manual).
52. CONTROL KEYS
These eleven keys allow the operator to modify all time code fu nc tions ex cep t fra me rate (see
" TIME CODE AND PILO
T-sec tion IV 0' this manual).
June 1988 I
1.0-8

1.5 CONNECTORS
;
e
-
- -
•
""'"
- --
.-
_. -
.-
•
':- ~ ~ (r---------;::: = ;;;;;;-:: = ~ :-~
"""'"'
i "'; -=l
••
42
41
31
36 38
36 . MIKES (RIGHT) (Channel 2)
CCIR NAB
1=I np ut signal Ground
2+3=Balan
ce d signal Input
37. MIKES (LEFT) (Chan ne l 1)
Id enti ca l to No 36 above , but for the ot he r chan ne l.
38. SIX
DYN 50
DYN 200
+12
+48
- 12
T
POSITION MICROPHONE TYPE SE LECTOR , channel 2 (right)
=Dy nam ic microphone impedance 50 Ohm 0 .1 mV I lJ bar (1 mVl pal sensitivi ty
= Dy na mic microphone im peda nc e200 Ohm 0.2 mV Jpbar (2mVipa ) s ens itivi ty
= Condenser mi crophone. 1rnV :J.lba r (lOmV/pa) sensl tlvitv +12 V phantom pow er ing
= Co n de nser micr ophone . 1 mVllJbar (10 mVt pa) se ns itIvi ty +48 V phantom po wering
=Con de nser microphone, 1 rn Vl lJbar (l Om V/pa) sensitivity - 12 V phant om po we ring
=Condenser mi cr op hone, 1. 5m Vl IJbar ( l5m Vipa) sensillvlty +12 V T po wering
(Tona de rsoeisuoq since 1984)
June 1988 I1.5
-'

39. SIX POSITION MICROPHONE TYPE SELECTOR, channel 1(left)
(Identical to No 38) except for the other channel.
40 .MIKES PHASE: Phase Inverter for channel 1(left) mlc Input
This can be used to invert the phase of the left channel.
41 .INPUTS
line inputs connector. (Both channels)
1= Channel 2(right) input: impedance variable from ato 5 kOhm
(0 to 10 kOhm when switch
11 is in the ST.HS position).
Current drive with minimum source impedance 47 kOhm.
Current to obtain 0 dB at max. sensitivity is 7.8
llA ·
2= -10G : -10 V stabilized voltage output; maximum current 100
mA for all - 10 V terminals
3=Channel 1 (left) input. Identical to pin 1
7=GROUN
D: For input signals
42. EXT. NRS
(External noise reduction system): Connection to external NRS. Output and input voltage 56 0 mV
for 0dB.
1=EXT. NRS. output, channel 2 (right)
2=- 10G : - 10V stabilized output. Imax = 100
mA
3=EXT. NRS. output, channel 1 (left)
5=EXT. NRS. input, channel 1 (left). Minimum impedance
4
7k Ohm
6= EXT. NRS. input, channel 2 (right). Minimum impedance
47 kOhm
7= GROUND : Ground for input signals
43. OUTPUTS
li ne output connector.
1=Channel 2 (right) output: output voltage 1 V at 0 dB. Mini
mum
impedance load 500 Ohm.
2=-1 0G :
-10 V stabilized voltage output. I max =100 rnA
3=Channel 1 (left) output. Identical to pin 1
4=V unstab: Unstabilized power supply voltage
5=- 1DR stabilized voltage available in record only.
I max =100 mA
6= STOP. In put for motor stop co ntrol. Connect to - 10 V to stop
the motor
7= GROUND
June 1988 I
1.6-2

CC~
e!
II
48
44 .PILOT
Pilot signal i nput for pilot track.
1=: GROUND
2=Clapper : Reference oscillator or crystal pilot generator input
3::: X -TAL : 50 or 60 Hz internal gene rator output
4=Pilot in : Pilot signal input
45 . LINE OUTPUT (right) : Channel 2 (right) output on banana plugs.
46. LINE OUTPUT (left) : Channel l (left) output on banana plugs.
47. CUE
Connec to r for recording and playback of the pilot track:
1=Sync reference
2=- 10 V stabilized voltage output
3=Pilot output
4=Speed correction input
5=- 10 V FM
co nn ect to - 10 V 10 activate modulat or
6=Cue output
7 = GROU ND
June 1988 I 1
.5-3