International Tapetronics Corporation 99B Series User manual

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TECHNICAL MANUAL
SERIES 99B
CARTRIDGE MACHINE
REPRODUCER/RECORDER
iniGRfiRTIOfiAL TAPETROAICS CORPORATOR '
2425 South Main Street Bloomington, Illinois 61701
_OOOOOOOOOO ‘ -_ 0

SERIES 9W
CAR RIDGE MACHENE
REPRODUCER/RECORDER
ECHNICAL MANUAL
(890-0022-000)
IN ERNA IONAL APE RONICS CORPORA ION
2425 South Main • Bloomington, Illinois
elephone: 309/828-1381

©1982 ITC/3M Printed in U. .A.
MADE UNDER ONE OR MORE OF THE
FOLLOWING PATENT
ira &38
3.042JM 4.105.934 4.040.114 4.142.221 4.101.937
D248.333 4,153.018 4.221.316 4.219.167
OTHER PATENT PENDING

PREFACE
HE H C INS RUC ION MANUAL
International Tapetronics Corporation
Manuals are written with the intent of
assisting the reader-user toward a
better understanding of ITC equipment.
Most instruction manuals are seldom
read except at the time of crisis when
equipment malfunction is suspected.
When this happens, the manual is
usually missing, or at best, difficult
to locate. P EASE FIND A CONVENIENT
SPOT TO KEEP THIS MANUA .
We at ITC have tried to produce a
useable manual. But, being human, we
are subject to the frailities of be 
havior. Therefore, should you discov 
er any errors or amissions, or should
you wish to contribute any recommenda 
tions, please send us your comments.
We will be most appreciative.

ABLE OF CON EN S
Page
SECTION I . INTRODUCTION/SPECIFICATIONS
1-1
INSTA ATION AND OPERATION SECTION II.
2-1
3-1 SECTION III.
MECHANICA ADJUSTMENTS
4-1
SECTION IV. MECHANICA DRAWINGS
5-1
E ECTRICA ADJUSTMENTS
SECTION V.
1-1
1-2
A. General Description
B. Specifications ....
A. General ..
B. Reproducer
C. Recorder .
Installation ..............
External Audio Connections .
External Control Connections
Controls and Indicators ....
Operational Options .......
2-1
2-1
2-2
2-5
2-8
3-1
3-1
3-2
3-5
3-5
3-5
3-6
3-6
3-9
3-9
3-1 2
3-12
3-1 3
A.
B.
C.
D.
E.
A.
B.
C.
D.
E.
F.
E.
F.
G.
H.
I .
J.
K.
.
M.
J.
K.
.
M.
N.
A.
Important Considerations ....................
Bo Pressure Roller Shaft/Cross Shaft Clamp Adjust
C. Capstan Shaft (Motor) Positions ...........
D. Pressure Roller Pressure/Solenoid Adjustment .
Solenoid Dampening Adjustment ...............
Cartridge Guidance System Alignment .........
Tape Guide Adjustment .......................
Head Height and Zenith Adjustment ...........
Monophonic Head Azimuth Adjustment ..........
Stereo System Head Azimuth Adjustment .......
Head Replacement ...........................
Recording Head imit Switch Adjustment ......
Splice ocator Sensor Adjustment ............
5-1
• 5-1
5-3
Front Panel of Reproducer with Dimensions-Figure 4-1 ... 4-1
Front Panel of Recorder with Dimensions-Figure 4-2 .... 4-2
Rear View of Reproducer - Figure 4-3 .................. 4-2
Rear View of Recorder - Figure 4-4 .................... 4-2
Top View of Reproducer - Figure 4-5 ................... 4-3
Bottom View of Reproducer - Figure 4-6 ................ 4-4
G. Top View of Recorder - Figure 4-7 ..................... 4-5
H. Bottom View of Recorder - Figure 4-8 .................. 4-6
I. NAB Track Format - Figure 4-9 ......................... 4-7
Expanded View of Playback Deck - Figure 4-10 .......... 4-9
Expanded View of Playback Deck with E SA - Figure 4-11..4-11
Deck and Shield - Figure 4-12 ......................... 4-12
Capstan Motor Assembly - Figure 4-13 .................. 4-12
Solenoid Assembly - Figure 4-14 ....................... 4-12

6-1
D.
F.
G.
I.
J.
K.
.
M.
6-3
6-4
6-4
6-5
6-6
6-7
6-7
6-8
6-9
6-9
6-10
6-1 1
6-1 1
6-12
6-13
6-13
6-19
6-20
6-21
6-14
6-1 5
6-15
6-16
6-16
6-16
6-24
6-25
6-25
6-26
6-26
6-26
6-17
6-17 & 6-18
6-18
6-22
6-22 & 6-23
6-23
SECTION VI. E ECTRICA DRAWINGS
A. Block Diagram Series 99B
B. Servo
1. Schematic, Figure 6-1
2. Component oading and Overlay, Figure 6-2
3. Parts ist . .
C. Play and Cue Amp
1. Schematic, Figure 6-4
2. Parts ist
3. Stereo Component oading and Overlay, Figure 6-5
4. Mono Component oading and Overlay, Figure 6-6 .
E SA Control
1. Schematic, Figure 6-7
2. Component oading and Overlay, Figure 6-8
3. Parts ist
E. Play ogic Control
1. Schematic, Figure 6-9 .........................
2. Component oading and Overlay, Figure 6-10
3. Parts ist
Reproducer Mother Board
1. Schematic, Figure 6-11
2. Component oading and Overlay, Figure 6-12
3. Parts ist
Flexible Switch Board
1. Schematic, Figure 6-13
2. Component oading and Overlay, Figure 6-14
3. Parts ist
H. Play Erase Phase Card
1. Component oading and Overlay, Figure 6-15
2. Schematic, Figure 6-16
3. Parts ist
Record and Meter Amp Card
1. Schematic, Figure 6-17 .........................................................
2. Parts List
3. Component oading and Overlay, Figure 6-18 ....
Record Bias Card.
1. Schematic, Figure 6-19 .........................................................
2. Parts List
3. Component oading and Overlay, Figure 6-20
Record ogic Control
1. Schematic, Figure 6-21 ........................
2. Parts List r
3. Component Loading and Overlay, Figure 6-22 ..........
Record Mother Board
1. Schematic, Figure 6-23 ........................
2. Component oading and Overlay, Figure 6-24
3. Parts ist ................
Record Meter Board
1. Component oading and Overlay, Figure 6-25
2. Schematic, Figure 6-26 .......................
3. Parts ist

Page
N.
7-1
MAINTENANCE
SECTION VII.
8-1
WARRANTY
SECTON VIII.
6-27
6-27
6-28
6-28
6-29
7-1
7-1
7-1
O.
P.
A. General ..
B. Mechanical
C. Electrical
Record Switch Board
1. Schematic, Figure 6-27
2. Parts ist . . .
3. Component oading and Overlay, Figure 6-29
.E.D. Board Component oading and Overlay, Figure 6-29
Record Chassis (Stereo) Parts ist ..............

ILLUSTRATIONS
Figure
Number
Page
Number
2-1
2-2
2-3
2-4
2-5
2-6
2-7
2-8
2- 9
2- 10
3- 1
3-2
3-3
3-4
3-5
3-6
3-7
3-8
3- 9
3- 10
3-11
3-12
3-13
3-14
3-15
3-16
3-17
3- 18
4- 1
4-2
4-3
4-4
4-5
4-6
4-7
4-8
4- 9
4- 10
4-11
4-12
4-13
4-14
5- 1
6- 1
2-1
2-2
2-2
2-2
2-3
2-4
2-4
2-6
2-6
2- 6
3- 1
3-2
3-2
3-3
3-3
3-4
3-5
3-5
3-6
3-7
3-7
3-8
3- 8
3-11
3-12
3-13
3-14
3- 14
4- 1
4-2
4-2
4-2
4-3
4-4
4-5
4-6
4-7
4-8
4- 9
4- 12
4-12
4-12
5- 2
6- 1
Reproducer/Recorder Rack Mount Dimensions
Reproducer Front Panel Dimensions
Reproducer Audio CUtput Connections
Recorder Audio Input Connections
Sample Remote Control Schematic
Reproducer Rear View Connectors ...
Recorder Rear View Connectors ....
Front View Recorder Controls ... .... *
Front View Reproducer Controls .. ..
Recorder Meter and Function Switches ....
Pressure Roller Pressure Gauge
Solenoid inkage ...........
Top View, Solenoid inkage and Cross Shaft Clamp Setup
Correct ocation of Pressure Roller in Deck ......
Correct ocation of Motor and Pressure Roller Shaft ..
Proper Adjustment for Solenoid .... ....
Proper Adjustment for Pressure Roller Pressure
Air Dampening Adjustment
ypical NAB ype AA Cartridge
Proper ocation of Cartridge ....................
Proper Use of Tape Height Gauge .
Azimuth and Zenith Adjustment ...................
Zenith Adjustment .
E SA System Adjustment
Oscilloscope Pattern for Azimuth Adjustments .
Head Seating Placement
Top View Splice ocate Adjustment .
Side View ocate Adjustment ....................
Front Panel of Reproducer with Dimensions .
Front Panel of Recorder with Dimensions
Rear View of Reproducer .
Rear View of Recorder .
Top View of Reproducer .
Bottom View of Reproducer .
Top View of Recorder ........................... -
Bottom View of Recorder .
NAB Track Format - Mono (top) and Stereo (bottom) .
Expanded View of Playback Deck .
Expanded View of Playback Deck with E SA Cations ....
Deck and Shield ...............................
Capstan Motor Assembly
Solenoid Assembly
Motor Control Wave Form for Adjustment
Block Diagram Series 99 b

I USTRATIONS (Continued)
L
Figure
Number
Page
Number
6-1
6-2
6-4
6-5
6-6
6-7
6-8
6-9
6-10
6-11
6-12
6-13
6-14
6-15
6-16
6-17
6-18
6-19
6-20
6-21
6-22
6-23
6-24
6-25
6-26
6-27
6-28
6-29
6-3
6-4
6-5
6-7
6-7
6-8
6-9
6-10
6-11
6-12
6-13
6-14
6-15
6-16
6-16
6-17
6-18
6-19
6-21
6-22
6-23
6-24
6-25
6-26
6-26
6-27
6-28
6-29
Series 99B Servo Schematic ...........................
Series 99B Servo Component oading and Overlay ..........
Play and Cue Amp Card Schematic .......................
Play and Cue Amp Cart Component oading and Overlay (Stereo).
Play and Cue Amp Cart Component oading and Overlay (Mono) ..
E SA Corirol Schematic ...............................
E SA Control Component oading and Overlay ..............
Play ogic Control Schematic .........................
Play ogic Control Component oading and Overlay .........
Reproducer Mother Board Schematics ..........................................
Reproducer Mother Board Component oading and Overlay .....
Flexible Switch Board Schematics ......................
Flexible Switch Board Conponent oading and Overlay ......
Play Erase Phase Card Component oading and Overlay ......
Play Erase Phase Card Schematic .......................
Record and Meter Amp Card Schematic ...................
Record and Meter Amp Card Component oading and Overlay ...
Record Bias Card Schematic ...........................
Record Bias Card Component oading and Overlay ..........
Record ogic Control Card Schematic ...................
Record ogic Control Card Component oading and Overlay ...
Record Mother Board Schematic ........................
Record Mother Board Component oading and Overlay ........
Record Meter Board Component oading and Overlay ........
Record Meter Board Schematic .........................
Record Switch Board Schematic ........................
Record Switch Board Component oading and Overlav ........
.E.D. Board Component oading and Overlay .............

SEC ION I. IN RODUC ION / SPECIFICA IONS
I. introduction / specifications
1-1
realized by
mechanical
interaction between any of the
Steel ball pivots combine with a
to permi t much
The entire head nodule
be relieved without destroying pre 
adjustments thus allowing for
and flexi-
This serves to lower the operating tem 
perature. Faster tape stop time occurs
because less field-to-collapse in the
winding produces faster solenoid plunger
release. This results in minimal tape
overshoot.
The entirely new true, center-pivot
head module is designed with rotational
axis in the exact vertical and horizon 
tal centerline of the heads. Height,
zenith and azimuth adjustments are in 
dependent and individually lock, preven 
ting interaction between any of
three,
longer azimuth pivot
finer tuning,
can
vious adjustments thus
greater interchangeability
bility.
Performance improvements
the previously described
changes can best occur when the tape
cartridge is positioned accurately, con 
sistently, and without distortion to the
cartridge material. ITC, therefore, has
designed a completely new cartridge pos 
itioning system which assures precise,
rigid alignment of tape and head, even
when cartridge insertion is hurried or
somewhat careless.
Electronically, the Series 99B incor 
porates many standard features made pos 
sible by micro-processor technology.
The cue tones which are generated and
detected digitally are crystal refer 
enced for long term frequency stability.
Cue tones include Primary, Secondary and
Tertiary. A two speed (standard 7.5 IPS
and 20.25 IPS high speed cue) crystal
locked DC brushless servo motor dramat 
ically inproves flutter performance and
reduces heat.
A specially designed reproduce head,
coupled with a low inductance recording
head, contribute to frequency response
which equals open reel quality. High
frequency bias (256 kHz) and a unique
bias and program mixing amplifier com 
bine to reduce intermodulation distor 
tion to the point at which the magnetic
A. GENERAL DESCRIP ION
The Series 99B cartridge equipment
from International Tapetronics Corpora 
tion has been designed and built using
the technology available today. Micro 
processor control is the key behind the
innovative standard features of the
Series 99B. ow-noise and BI-FET op-amp
circuits have provided the basis for an
audio system which easily accomodates the
best magnetic tapes of today.
One of the guidelines used during the
development of the Series 99B was the
December, 1975, NAB Standards for car 
tridge tape recordings and reproductions.
The standards outlined therein have been
met and in many cases improved upon.
The Series 99B is built on a nodular
basis in which the playback transport
electronics and the recording electron 
ics are each housed in separate units.
This allows greatest flexibility in
mounting the Series 99B and also makes
the addition of a recorder unit to an
existing reproducer at a later date a
simple task. All sub-assemblies such as
motherboard, amplifiers, control cir 
cuits, power supplies, front and rear
panels, and head assemblies are either
plug or bolt-in place. This feature
makes service convenient and efficient.
Sockets are also used for IC's and tran 
sistors to ease individual component re 
placement.
Mechanically, the Series 99B is built
with the reliability of standards set by
ITC. These include solid 1/2 inch thick
anodized aluminum deck, full swing chain
driven pressure roller assembly, heavy
duty air-damped solenoid, and a preci 
sion micro-adjust head assembly. A long
lasting high adhesion pressure roller
material which pulls better with less
pressure is standard.
Solenoid operation provides for
stable tape travel path, lower operating
temperature, and minimal tape overshoot.
The tape path has greater stability due
to consistent plunger location under all
temperature variations. The coil cur 
rent is also reduced after engagement as
a result of the true positioning feature.

with
Monophonic
Stereophonic
Squelched
74 dB or greater
74 dB or greater
S/N
53 dB or greater
50 dB or greater
B. SPECIFICATIONS
Hum & Noise
58 dB or greater
56 dB or greater
Capstan Motor:
Among pro-
1-2
-18 to - 1 dBm
-10 to + 7 dBm
- 5 to +12 dBm
+ 1 to +18 dBm
Power:
VA.
Reproducer: 0.5%
harmonic distortion,
or less
Record to
*
or less
Measured
1975 NAB
tape and cartridge become the limiting
factors.
Group delay compensation is used in
the recording amplifier to improve
square wave performance and transient
response. Peak indicators which follow
tape saturation are conveniently mounted
in the meters. Meters may be used to
monitor input, output, program and cue
bias and cue playback. These functions
are all selectable from the front panel.
Input monitoring (NORM REC) is automati 
cally switched to output monitoring (PGM
P AY) when the machine is not recording.
The primary cue tone may be recorded at
any time from the front panel 1 kHz cue
control switch.
A new standard feature with Series
99B recorders is CUE ERASE. Selective
erasure of any material on the cue track
is possible using this function. Another
operational feature especially useful in
machine maintenance is the multi-func 
tion test tone generator. A complete
frequency response test can be made in
less that five minutes without taking
the machine out of service . The output
of the tone generator is accessible from
the remote connector for external use.
The RPSE (Stereophonic) and RPME
(Monophonic) units incorporate all the
features of the Series 99B. These in 
clude stereo or mono recording and re 
producing; automatic erase, azimuth
(phase) alignment of the recording head,
and splice location (E SA); brushless DC
servo motor and previously described
features. Variations of these units are
available and may be obtained by con 
tacting ITC Sales Department.
Amplifier Distortion:
or less total
0.1% or less third harmonic distor 
tion. Recorder: 0.5% or less total
harmonic di stortion , 0.1%
third harmonic distortion,
in accordance with the
standard.
System Distortion: 0.8% or less total
harmonic distortion, 0.5%
third harmonic distortion.
playback at +4 VU recording level.
Noise: *, **, ***
IPS (51.4 cm/s). Normal operating
speed may be changed by jumper to
3.75 or 15 IPS (9.5 or 38 cm/s).
Wow & Flutter: Playback: 0.12% or less
DIN weighted. Record/play: 0.15% or
less DIN weighted.
Speed Accuracy: 0.1% maximum deviation.
Rated Output Load Impedance: 600 ohms
balanced. May be strapped for 150
ohms. Measured at 1 kHz in accord 
ance with 1975 NAB standard.
Audio Output Capability: +25 dBm maxi 
mum before clipping. May be strapped
to provide the following operating
ranges without deteriorating the
signal-to-noise ratio.
Preamplifier Hea Room: *****
Reproducer: +25 dB
Recorder: +24 dB
Crosstalk Between Channels: *
gram and cue channels.
120/240 volts AC, 50/60 Hz; 40
800 VA during erase cycle of
E SA equipped units. Selectable taps
for accommodating varying line volt 
age conditions. Taps at 105V, 120V,
210V, 225V, and 240V.
Direct drive, crystal
referenced, brushless DC servo, cap 
stan motor with ceramic shaft and
permanently lubricated ball bearings.
Tape Speed: 7.5 IPS (19 cm/s): High
speed cue standard on models at 20.25

Cue to Program
Program to Program
150 Hz 52 dB
50 dB
40 Hz
1 kHz
50 dB
48 dB
1 kHz
8 kHz
40 dB
45 dB
10 kHz
ease and
Frequency
150 36 dB
Hz
1 kHz
8 kHz
(tape
F).
1-3
(Specification limited for record/play
by noise of tane, NOT electronics.)
Metering:
scale,
to ring:
Cue Track
Erase Depth
Input and output
compatible with
256
for
40 dB
50 dB
(limited by
tape noise )
program
an
in-
20 K ohm bal-
600 ohm and
loads
"A ”
for moni-
( automatic
Record to playback
* +/-1.0
-20 dBm
-10 dBm
0 dBm
+10 dBm
Taut band movement with
Switch selection
Recording input
switching to program playback when
machine is not recording):
playback; program bias; cue bias;
cue playback. Built in ED peak
dicators follow tape saturation.
Bias Amplifier: Crystal referenced
kHz for program track(s), 83 kHz
cue track.
Cue Erase: * ‘ ‘ *'
or detection
kHz or any
NAB size AA
100 milliseconds
movement) .
150 milliseconds (to audio
on) .
Stop ime: 75 millisconds (transport
and electronics). ape travel after
stop signal varies according to type
of cartridge used and length of tape.
Ambient Operating emperature Range:
10° C to 55° C. (50° F to 131°
Square Wave Response: At 1 kHz* phase
distortion compensation in recorder
to minimize overshoot.
ape Capacity:
Start ime:
Frequency Response:
at -14 VU recording level.
dB from 31.5 Hz to 16 kHz.
Equalization: 1975 NAB standard, (50 us)
adjustable for CCIR (70 us). 1964
NAB standard may be accomodated by
strap removal in recorder (3180 us,
50 us). High frequency equalization
control included in recording ampli 
fier, with both high and low fre 
quency controls in reproducer.
Head Configuration: NAB - two
for mono (0.080" track width),
tracks for stereo (0.043"
width) .
other combination,
to cue system are
1975 NAB standards.
Audio Input Impedance:
anced bridging standard.
150 ohm balanced terminating
may be selected by jumper.
Audio Input Capability: +28 dBm @ 0.5%d
HD (recorder). Strappable for the
following mid-range (level control
knob position) sensitivity levels to
facilitate front panel adjustment
optimize signal-to-noise.
tracks
three
for stereo (0.043" track
Separate record and repro 
duce heads permit playback monitoring
while recording.
Cue Signals: NAB - primary (1 kHz), sec 
ondary (150 Hz) and tertiary (8 kHz)
all standard. Open collector tran 
sistor switching for external control
available for 150 Hz and 8 kHz in ac 
cordance with 1975 NAB standard. Op 
tional relays available. Secondary
cue, 150 Hz, and tertiary cue, 8 kHz
may be applied during recording pro 
cess or during playback. 150 Hz and/
or 8 kHz tones are strappable to in 
itiate high-speed cue upon conclusion
of detection of tone (playback or re-
cord/playback mode) . Individual and/
or simultaneous tone generation and
detection are available for 1 kHz,
150 Hz, and 8 kHz.
• Logging Signals: External input to the
cue recording amplifier and external
output from the cue reproducer ampli 
fier are available for recording and
reproducing logging signals at -10 VU
between 3.3 kHz and 6.5 kHz. Exter 
nally applied cue tones are not for
simultaneous generation
with 1 kHz, 150 Hz, 8

Monophonic
and
50 Hz ine
60 Hz ine
Average
Rack
Specification Pending
Peak
Width Height Depth
90 mm
133 mm 216 mm
394 mm
(.354 in)
(5.25 in) (8.5 in)
(15.5 in)
1-4
Add for
Feet
*****Referenced to 160 nW/m as specified
in the 1975 NAB Cartridge Recordings
and Reproductions Standard.
****Referenced from NAB cue tone repro 
duce levels.
Automatic Erase:
Stereophonic*
(Erase mode not intended for contin 
uously repeated operation. )
*A11 measurements made using 3M Scotch 
cart tape and referenced to 1 kHz re 
corded at 250 nW/m, 4 dB higher than
the 160 nW/m reference of the 1975 NAB
Cartridge Recordings and Reproductions
Standard.
***
Audio measurements band limited to
20 Hz to 20 kHz. A
Specification Pending
audio and
Mating con-
Weight: Playback: 13.6 kg (30 pounds),
wi th ELSA 14.1 kg (31 pounds ). Re 
cord! ng amplifier: 6.8 kg (15 pounds).
E SA System:
Splice ocate:** Detect one mil thick
splicing tape thickness minimum,
square and diagonal ended cut.
Automatic Phase Alignment:**
Monophonic: 1.0 dB or less azimuth
loss at 10 kHz.
Stereophonic: +/" 20 degrees or less
difference between left
and right program chan 
nels at 10 kHz ( to be
measured under steady
state conditions after
application of E SA se 
quence) .
Remote Control: All front panel con 
trols and indicators plus cue erase,
1 kHz record and defeat and external
cue tones record input and enable
lines.
External Connectors: X R
latching remote control,
nectors are furnished.
Mounting: Table top mounting,
mount housing optional.
Dimensions (Maximum):
**A11 measurements - 3M Scotchcart AA
cartridge with 3.5 minutes tape load
running at 7.5 IPS.

SECTION II. INSTALLATION AND OPERATION
. IL INS ALLA ION AND OPERA ION
A. INSTALLATION
housing accommodates mount
See Figure
B. EX ERNAL AUDIO CONNEC IONS
(101. Ontm.)
Figure 2-1
2-1
(4 82.60 mm
An appropriate combination of plugs
and sockets is provided with each Series
6 IS/1 e In
(176. 21mm.)
I I 5/32in
” 1""
RACK MOUNT OEPTH FROM
ALLOW 2 ADDITIONAL INCHE (50. 80 mm.)
It is inportant to note that the +
(plus) and - (minus) signs are indica 
tions of proper phase relationships only
and do not reflect DC voltage potential.
It is necessary to connect the + lines
of both channels to the corresponding +
(or equivalent) terminal of the external
source in order to prevent phase rever 
sals.
MOUNTING URFACE I 1 5. 3 9 4 in. ( 391.0 I m m . )
FOR CONNECTOR CLEARANCE.
Adjustments outlined within this
section are made at the factory to a-
chieve optimum performance from Series
99B cartridge machines. At the time of
installation, three adjustments may be
required: program reproduce level, re 
corder input level strap, and internal
test tone generator "0" VU level cali 
bration.
99B machine for connecting audio inputs
and outputs. Refer to Figures 2-6 and
2-7 for proper location of connectors.
Inputs and outputs are balanced; it is
therefore recommended that two-conductor
shielded cable be used for each. Attach
the shield only at either the ma 
chine end or the console to prevent any
potential ground loop. Figure 2-3 shows
a proper method of connection for the
playback output lines. Figure 2-4 illus 
trates the connections required for the
recorder inputs.
Shielded cables are recommended for
all remote audio functions (cue amp out 
put, square wave output, test tone gen 
erator, cue amp input).
The Series 99B machines are design 
ed for table top mounting. Machines,
including recording amplifiers, may be
safely stacked 3 to 4 high if desired.
Vertical space requirement for each
Series 99B machine is 7 inches when rack
mounted in the ITC rack mount housing.
The rack
either two playback units side by side
or one recorder/playback.
2-1 and 2-2 for additional mounting in 
formation.

□ □
UcuTI
m
o
Figure 2-2
C. EXTERNAL CON ROL CONNEC IONS
Additional remotes available are:
rr
n
7)
2 LEFT
+
RIGHT
RIGHT
REPRODUCER AUDIO OUTPUT CONNECTIONS
RECORDER AUDIO INPUT CONNECTIONS
Figure 2-4
Figure 2-3
2-2
2
I
2
I
TO
P2
TO
PI
TO
LOAD
TO
2
5 7/32 In.
(132.56 mm.)
Of
ready
(see
front
lamp
page
A — t-
8 9/16 In.
( 2 17.49 mm.)
panel
is
2-8)
TO
3
2
1 --------- ► GND
NOTE : CONNECT SHIELD
AT ONE END ONLY
(CONSISTENT WITH
STATION WIRING)
---------------- - +
I ------- ► ONO
NOTE : CONNECT SHIELD
AT ONE END ONLY
(CONSISTENT WITH
STATION WIRING)
-►GND
V-*-
l — — ► GND
1. Secon ary cue open collector output —
— pin 40 — 200 ma. switching
FROM
S- AUDIO
SOURCE
All remote control functions are
accessible through one connector, J1,
located on the playback rear panel. Fig 
ure 2-5 illustrates many of the common
remotes used and the proper method for
making the connections.
Insome cases, unshielded lines may
be tolerated for remote switch functions
However, it is recommended that shield
cables be used in all installations.
current (sinking), maximum 25 VDC
open circuit voltage, switches to
ground upon sensing of secondary cue.
2. ertiary cue open collector output —
— pin 37 — switches to ground upon
sensing of tertiary cue.
3. Auxiliary Start Pulse — pin 28 —
momentary (100 msec) pulse to ground
upon start of cartridge — open
collector. May be used to start an
external clock or timer. Maximum 25
VDC open circuit voltage, at 200 ma.
4. Ready Ground — pin 3 — follows
ready lamp function, when lamp is on,
ready ground signal is at ground.
When lamp is off, signal is open
collector. Caution: ready ground
follows condition
ready lamp. If
strapped to flash
ready ground will change states syn 
chronous with front panel ready
All switches shown are momentary
action, single pole. Typical switching
current is 5 ma. DC at a maximum 5 VDC.

SAMP E REMOTE
CONTROL CHEMATIC
0
T ART
REMOTE TART WITCH
©
WITCH COMMON
r
0
RUN
/
I
0
+ O VDC
I
TOP
0
REMOTE TOP WITCH
X--
READY ( TOP)
0
0
+ O VDC
I
0
CUE
Notes
REMOTE CUE WITCH
0
CUE
1.
REMOTE CUE LAMP
' I
I
"cannons" together
2.
0
+ O VDC
3.
0
DIGITAL COMMON
together between other
0
+ O VDC
4.
any
i
0
ECONDARY OPEN COLLECTOR
5.
0
DIGITAL COMMON
6.
0
TERTIARY OPEN COLLECTOR
7.
and
RECORD ET WITCH
0
REMOTE RECORD ET WITCH
0
WITCH COMMON
and
0
RECORO LAMP
REMOTE RECORD ET LAMP
0
+ 30 VDC
0
COMMON
DIGITAL
0
EL A
EL A WITCH
REMOTE
I KHi CUE RECORD
0
I KHi CUE DEFEAT
0
X RECORD
I O Hz
0
X
Figure 2-5
8 KHI RECORD
0
2-3
Use shielded cable runs where pos 
sible.
the electrical
this Technial
REMOTE 150 Hl CUE
RECORD WITCH
I
I
I
I
I
8 KHI ( TERTIARY )
DETECT
I O Hi ( ECONDARY)
DETECT
RELAY WITH
DIODE
ie shields and
only at the machine end.
REMOTE RUH AMP
( RUN GROUN D )
j^i
' v r
02
-o o
32-
o ci-
02
o o
_y
2T
Do not "mix" digital ground, switch
cannon, or audio ground circuits, to
prevent digital or DC ground loops.
For other JI connections not noted
here, refer to the reproducer mother 
board schematic in
drawings section of
Manual.
24 VO T
IN4OO5
REMOTE STOP AMP
(READY GROUND )
~1^
7?/
Keep all switch and lamp circuits
"above" any ground at all points
outside the machine.
Do not tie cannons, shields, or +30
volt lines t *~ ’ ~*' t
machines.*
*For "Daisy Chain" operation, I C recan 
mends the use of the optional plug-in
relays for absolute ground and power
supply isolation between machines
peripheral interface gear.
REMOTE 8 KHI CUE
RECORD WITCH
REMOTE I KHi CUE
RECORD WITCH
REMOTE I KHt CUE
DEFEAT WITCH
Keep all interface cabling segre 
gated fran high-power cables (such
as A.C. runs and speaker leads).

o
HEAD INTERCONNECTION CABLE
TO RECORDER CONNECT HERE
PZ RIGHT
n •••••
Figure 2-6
not to be less than 5K
o
CONTROL INTERCONNECTION CABLE
FROM PLAYBACK CONNECT HERE
I
Figure 2-7
2-4
Tl
POWER
TRAN FORMER
Connect
across
CONTROL INTERCONNECTION
TO REPRODUCER
and logging
recorded on the
©
AUDIO
OUT
RECORD
HEAD
P5
CONTROL
TO RECOR
RECORD
HEAO
P3
INTERCONNECTION CAB E
DER CONNECTS HERE
5)®
JI REMOTE
LINE CORD PLUG IN HERE
output avail -
For monitoring,
HEAD INTERCONNECTION CABLE
FROM PLAYBACK CONNECT HERE
(shield) to
Nominal
pin 8
16) with
(normally open
rangement ) for erasure
information previously
cue track. Active
- switch to
a momentary
contact ar-
of cue tone
connect ground lead
pin 45 — audio ground,
voltage is .5V r.m.s.
b. Square Wave output (analog signal
from tape converted to square
waves) is accessible on pin 44.
This output must be referenced to
the digital ground on pin 48 in
order to prevent interaction with
analog circuitry. Voltage swing
is +15 volts (peak to peak). oad
impedance
ohms.
7. Cue Erase —
ground (pin
switch
lamp. Maximum open circuit voltage
25 VDC, maximum current at 200 ma.
5. External Fade Control — pin 21 —
this is a DC control point for vary 
ing playback output level,
a potentiometer (25K ohms)
+15V and ground (pins 13 and 16),
connect the wiper arm of the poten 
tiometer to pin 21. When the wiper
potential is +15 VDC audio is ON, at
0 VDC audio is OFF. CAUTION — with
potentiometer in OFF position, in 
ternal audio ON circuit is disabled.
Both channels on a stereo machine
are controlled simultaneously with
one potentiometer.
6. Cue Amplifier Outputs:
a. Cue preamplifier
able on pin 11.
©•
© ®
P6 INTERCONNECT

switch
D. CON ROLS AND INDICA ORS
E.
2-5
internal
are
to
Out-
VAC
The
READY
has
Enables the oper-
1 kHz primary cue
as in the
Automatic
On when in a RUN mode.
5. Power Indicator — Red LED located
between the yellow and green cue tone
ED ’ s on the playback front panel.
6. Cue Switch — Used for high speed cue
and audio mute from STOP, START, or
RECORD (cancels record set) modes.
Pressing CUE while in high speed mode
causes audio to turn on for duration
1. Stop Switch — Active when cartridge
is loaded properly. Overrides all
other operations within the machine.
On when cartridge is
Flashes (as sup-
after cartridge
For optional
see
Operational Options.
Active whenever a
a
switch is held. CUE is also used in
conjuction with E SA switch.
7. Cue amp — On when in a CUE mode.
8. ELSA (Erase, Locate Splice, Azimuth) Switch —
Pressed and held in conjunction with
CUE causes automatic cartridge pre 
paration cycle to begin. NOTE: the
E SA switch must be pressed first and
held while the cue switch is pressed.
Pressing only the E SA switch during
any E SA cycle sets up an automatic
stop at the end of that particular
cycle. Simultaneous illumination of
RUN, CUE, and READY AMPS verifies
that the machine has accepted this
command.
Pressing and holding both E SA
and CUE switches until first flash of
the CUE lamp will automatically skip
the automatic azimuth cycle (for erase
and splice locate only). Allowing CUE
lamp to flash twice before releasing
switches will automatically skip the
azimuth and erase cycles (for splice
locate only) .
9. Record Set Switch
the READY mode.
NOTE: IN ORDER TO PREVENT POTENTIA
OPERATIONA PROB EMS, EXTERNA OAD
COMBINED CURRENT DRAIN MUST NOT EX 
CEED 0.2 AMPERES.
2. Ready amp —
1 oaded properly .
plied from factory)
has played and cued .
operation of the Ready function,
SECTION II.
3. Start Switch —
cartridge is loaded properly or in
CUE mode.
4. Run amp —
Active only in
When pressed, exter 
nal audio signals are switched into
the recording amplifier circuit.
Pressing START causes the recording
process to begin.
10. Record Set amp A visual indication
showing that the machine is either
ready to record or in the process of
recording.
11.1 kHz Cue Record —
ator to record a
tone at any desired time
case of editing a tape,
timing of the tone length is control 
led by the micro-processor. The
switch is active in a playback or re 
cording mode. The 1 kHz cue detector
is defeated while switch is depressed.
(See Figures 2-8, 2-9, and 2-10.)
12. 1 kHz Cue Defeat - Active only in a
RECORD preset mode (no tape running —
READY and RECORD lamps on) . When pres 
sed, ED (directly above switch)
latches on as an indication that the 1
kHz cue tone will not record automat 
ically when the cartridge is started.
(See Figures 2-8 through 2-10.)
13. Secondary C e Switch — Active in
either record or playback modes.
Used to record a secondary cue tone
only in playback mode after the
first 1.5 seconds of tape has play 
ed. Erases only when switch is
closed. (RECORDER ON Y).
8. External Cue Tone Record — Other
auxiliary tones may be recorded onto
the cue track by connecting the sig 
nal to pin 2 (cue record input) and
pin 45 (audio ground) and enabling
the cue recording system by switch 
ing pin 26 to ground (pin 16). Nomi 
nal input voltage — 1 VAC r.m.s.
Input impedance approximately 15K
ohms. (RECORDER ON Y) .
9. est one Generator — All
test tone generator frequencies
available at pin 27 referenced
ground at pin 45 (unbalanced),
put level is nominally 2.5
(r.m.s.) into a 600 OHM load,
output is directly coupled to an OP 
AMP, therefore, a slight DC offset
voltage of no more than 20 mv may
occur .

RIGHT METER
PEAK INDICATOR
ECONOA
CUE WITCH
Figure 2-8
FUNCTION ,
ITCHE AND
TART WITCH AND RUN LAMP
POWER INDICATOR
TOP WITCH AND READY LAMP
||CUE ||
s
Figure 2-9
CUE
0000000000 ®
e
5
V
V
Figure 2-10
2-6
ACCE DOOR -
HOWN IN OPEN
PO ITION
^-EL A WITCH
(WORK IN CONJUNCTION WITH CUE WITCH)
I KHZ
CUE
CONTROL
DEC INC
WITCHE
EVEN EGMENT
READOUT INDICATE
TONE GENERATOR FUNCTION
ELECTED
RIGHT CHANNEL INPUT
LEVEL CONTROL
V
METER MONITOR
ELECT WITCHE
1 ‘ lsTQpfl
ARY CUE WITCH
AND LAMP
. — RECORD ET
WITCH AND LAMP
TERTIARY CUE TONE
EN E INDICATOR
ECONDARY CUE TONE
EN E INDICATOR
CUE
ERASE
TONE
GENERATOR
FUNCTION
SE ECT
LEFT PEAK INDICATOR
CUE WITCH AND LAMP
ACCE DOOR TO METER
ADDITIONAL CONTROL W
INDICATOR
LED "ON" -------
INDICATE IKHZ
WILL NOT RECORD'

4
(for fine
6
used
7
2-7
secondary
Jumpers located
tone
and
0 — OFF (readout blank)
1 — 1 kHz at OVD reference level
2 — 1 kHz at -10 dB
3 — 10 kHz at -10 dB
(nodes 2 and 3 may be used for
bias calibration, rough azi 
muth and equalization mainten 
ance) .
Pressing the RECORD switch will
automatically reset modes 5 or 7 to
the beginning step frequency of 50
Hz.
(150 Hz) on the cue track. The sec 
ondary ED (green) on the playback
chassis illuminates and a remote
switching signal occurs upon sensing
of the cue tone. As supplied from
the factory, high speed recue is in 
itiated at the end of secondary cue
tone when the unit is in playback
mode. Jumpers provided on Play
ogic Card to defeat high-speed cue
if desired.
14. Tertiary Cue Switch — Active in
either record or playback modes.
Used to record a tertiary cue tone
(8 kHz). Illumination of the ter 
tiary ED (yellow) on the playback
chassis and a remote switching
signal occurs upon sensing of the
tone. Reproducer can be program 
med (jumper optional) to initate
high-speed recue at the end of ter 
tiary tone rather that
tone, if desired,
on Play ogic Card.
15. Cue Erase Switch —
The reference level of the tone
generator is internally adjustable
as well as variable through the use
of the front panel level controls.
The factory setting of the 1 kHz O
VU reference tone is matched to an
equivalent 0 dBm input signal. To
make optimum useage of the tone gen 
erator reference level it is recom 
mended that the internal level ad 
justment be made to match the buss
reference level commonly used in the
user ’ s application. In this manner,
the front panel level controls can
always be easily recalibrated using
the internal reference tone gener 
ator, eliminating the need to
"patch-in" an external tone oscil 
lator. See Section V for informa 
tion regarding this adjustment.
17. Peak Indicators — ocated on the
lower right hand side of the level
meters, used to indicate peaks
(which the meters cannot follow due
to ballistics) and also to indicate
tape saturation. The peak circuitry
monitors the audio information as it
is fed to the recording head, there 
by, "seeing" the contouring effects
of the amplifier and giving a rela 
tively true indication of when tape
is being saturated. The factory
setting is +8 VU, but may be reset
to almost any desired trip point,
depending on the saturation point on
— 14.5 kHz at -10 dB
azimuth adjustment).
5 — Slow frequency step including
50 Hz, 63 Hz, 125 Hz, 250 Hz,
500 Hz, 1 kHz, 2 kHz, 4 kHz, 8
kHz, 10 kHz, 12.5 kHz, 14.5 kHz
and ends with a continuous 3150
Hz tone for use in measuring
wow and flutter. All tones
(except 3150 Hz) are 8 seconds
long.
Hold — indefinitely holds any
of the frequencies used in
modes 5 or 7.
Same as 5 except duration of
frequencies is 4 seconds each.
Active only in
playback after first 1.5 seconds of
tape travel. This prevents acciden 
tal erasure of primary cue tone
which, if desired, can be erased
when tone appears again at end of
tape. Erases cue track data only
during the time the switch is pres 
sed. See Figure 2-10.
16. Decrement and Increment — Test tone
generator control, active in Record.
Pressing and holding either switch
will automatically clock the seven
segment readout from 1-7 (INC) or
7-1 (DEC). Releasing the switch
stops the clocking, causing the
readout to remain in the selected
mode (number). Starting the trans 
port then causes the selected tone
(tones) to record. The output of the
generator is also accessible through
the remote connector described ear 
lier. The seven functions include: