NEC TTS 58AXPJ User manual

NORTHEAST ELECTRONICS CORPORATION
P.O. BOX 649- CONCORD, N.H. 03301
{603) 224-7466
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INSTRUCTION MANUAL
/ / LONG Lr· I:J""\D .
L.... Lc ~~ IPMENT TESTING ANNEXE
t (I L. MoDEl tts~a~~;t ~
0
ST_,
'~- - and MODEl 58BXPJ
PHASE JITTER
MEASURING SETS
ISSUE 1
NORTHEAST ELECTRONICS CORPORATION
P.O. BOX 649- CONCORD, N.H. 03301
PRINTED IN USA APR
1970

PROPRIETARY NOTICE
The information contained in this publication is the property
of Northeast Electronics Corporation and may not be reproduced
or used for manufacturing purposes or disclosed to third parties
without the written permission of Northeast Electronics Corpor -
ation.
WARRANTY
NEG warrants all products manufactured or sold by NEG to
be free from defects in materials and workmanship , subject to
the following terms and provisions.
NEG's obligations under this warranty are limited to repair- ·
ing, adjusting, or replacing at our option, with reasonable prompt-
ness, any NEG product which shall with in twelve (12) months after
delivery to the original purchaser, and after normal and proper us-
age, prove to be defective on NEG inspection, provided that the
purchaser shall hav e reasonably inspected products when received
and notified NEG of any apparent defects discovered within fifteen
(15) days of receipt of shipment. NEG shall not be liable for any
manufacturing costs of the buyer, lost profits or good will of the
buyer' or any other special or consequential damages susta ined
or expenses incurred by the buye;r by reason of the use or sale
of any defective NEG product.
No products may be returned to NEG except with our written
permission. After receiving NEG factory authorization, material
requiring repair or replacement should be sent prepaid to the fac-
tory accompanied by a written statement setting forth as complete-
ly as possible the defects and the conditions under which they occur-
re d. Material de liv ered by NEG sha ll not be considered defective
if it satisfactorily fulfills the buyer's performance requirements
and/or is in accordanc e wi~h · ap'proved samples. NEG's obligations
on perfor~ance of product:>. delivered shall be limited to comply-
ing with specifications accompanying a purchase order or wl.th pub-
lished specifications on standard catalog items. This warranty does
not extend to any NEG products which have been subject to misuse,
neglect, accidents or improper installation or applications, nor
shall it extend to units · which have been repaired or substantially
altere _d outside the NEG factory, nor to any associated instruments,
equipments or apparatus. This warranty is in lieu of all other war-
ranties, express or implied.
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Section
1
2
3
4
5
6
7
TTS 58AXPJ
Model 58BXPJ
TABLE OF CONTENTS
Title
GENERAL DESCRIPTION
SPECIFICATIONS
OPERATING INSTRUCTIONS
CIRCUIT DESCRIPTION
MAINTENANCE AND CALIBRATI ON
ELECTRONIC PARTS LIST
SCHEMA TIC DIAGRAMS
Page
1-1
2-1
3-1
4-1
5-1
6-1
7-1

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TTS 58AXPJ
Model 58BXPJ
Section 1
SECTION 1
DESCRIPTION
1. 1 GENERAL DESCRIPTION. The
Model 58BXPJ is an accessory unit to be
used in conjunction with the Model 58B
Impulse Counter and Noise Measuring Set .
It mounts in the cover and derives its
power from the Model 58B unit. A power
cord permanently attached to the Model
58BXPJ is stored in the cord compartment .
1. 2 The Model 58BXPJ will me . asure
the peak to peak phase jitter, in degrees
of a 1000Hz signal. The phase jitter is
read on a self-contained meter with a 1°
0
to 100 log scale .
1. 3 Input line connections are made to
the tip-ring-sleeve binding posts or a jack
for a 310 type plug. A DIAL jack and
switchable hold coil are provided for dial-
ing through . Line bridging or 750n ter-
mination is provided . The input is balanced
and DC blocked for lOOV. A set of binding
posts and a jack for a 310 type plug are
provided for connecting the Model 58BXPJ
output circuit to the Model 58B line input
for impulsive phase hit measurement . A
conversion chart from dBrn to degrees for
phase hits is supplied.
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TTS 58AXPJ
Model 58BXPJ
Se ction 2
SECTION 2
SPECIFICATIONS
TTS 58AXPJ, Model 58BXPJ and Model
58BXPJR
INPUT SIGNAL LEVEL REQUIREMENTS:
INPUT IMPEDANCE:
INPUT BALANCE:
INPUT DC BLOCKING :
HOLD CIRCUIT:
OPERATING TEST FREQUENCY :
OPERATING TEMPERATURE RANGE:
METER SCALE CALIBRATION:
METER READING ACCURACY:
PHASE HITS OUTPUT:
POWER REQUIREMENTS:
Model TTS 58AXPJ:
Models 58BXPJ and 58BXPJR :
Model TTS 58AXPJ:
Model 58BXPJR:
Model 58BXPJ:
-30 dBm to +10 dBm
Terminated, 750 n +1 Oo/o
Bridging ~ 15Kn.@ lKhz
> 70 dB@ 1Khz
> 90 dB@ 50 Hz
Input blocked for l 00 Vdc
D. C. Resistance approximately 490r2
1000Hz .±_lOo/o
0° <C- 50° C, 32° F - l20°F
0 0
Log Scale, l to 100 peak to peak
.±. 1 Oo/o .±. l 0 of reading
Factory Calibrated for 0. 7V peak in
0 .
12 H2load@ * 50 peak phase shift,
for use with NEC TTS SSA or Model 58B .
US VAC -230 VAC, 50Hz/400Hz
approximately 0 . 4 watts. Appro . xima tely
2. 5 watts total w hen supplying power
to TTS 58A.
+12 Vdc, +SV de derived from Models
58B or 58BR.
TTS 58A Cover Accessory Size:
14" w X 8" H X 4 7/16 .
Weight: 9 pounds
Rack Mounted Unit
Size: 5 7 /32" x 19" Rack Panel 6" D
Weight : 7 pounds
Model 58B Cover Accessory
Size: 14 t W x 9 3/8" H x 4" D
Weight: 8. 5 pounds
2-1

Section 2
2-2
50
~
Q
3
2
0
5
20
5
TTS 58AXPJ
Model 58BXPJ .
!lf 10
1/
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1/
1/
50 60 70 80 90
IMPULSE SENSITIVITY (D&RN)
I-PATCH O UTPUT OF 58BXPJ
TO 586 liNE INPUT
2- SET 588 IMPEDANCE TO
600n &RDG
3- SET 588 NETWORK SWITCH
TO EXT
4- SET DESIRED IMPULSE
SENSITIVITY
7
6
ON
l 2
Figure 3-l Front Panel Controls
f
310
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\.__ OUTPUT . TO 588 __/
NORTHEAST ElECTRONICS CORP.
CONCORD , N.H ., U.S.A.
MEAS . NOISE
l.
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TTS 58AXPJ
Model 58BXPJ
SECTION 3
Section 3
OPERATING INSTRUCTIONS
3. 1
FRONT PANEL CONTROLS (Refer to Fig . 3-1).
Name of Control
1. FUNCTION
2 . BRDG -TERM
3 . HOLD-NO HOLD
4 . MEAS . NOISE-MEAS . PHASE
5 . ADJUST FOR MINIMUM/READ
(SWITCH)
6 . ADJUST FOR MINIMUM
(CONTROL)
7 . POWER- ON- OFF
8.
Function
Switches the TIP -RING input line
terminals to the DIAL jack or to
the set input \2~1ance transformer.
Provides for bridging or termina-
ing a circu i t .
Provides for connecting a hold coil
across the TIP-RING terminals of
the incoming line
Switches the TIP -RING input line
terminals to the input circuit of the
phase jitter set or to the OUTPUT
TIP-RING termbals when in the
MEAS-NOISE position
Selects a faster time constant for locking
on frequency _ when in the ADJUST FOR MIN.
position .
Provides the means for frequency
locking the phase jitter set to the
test signal frequency .
Power Switch
Jacks are provided for 310 plugs
for the LINE , DIAL and OUTPUT
circuits In addition binding posts
are provided . for the LINE and OUT-
PUT circuits
3-1

Sec~ion 3
TTS 58AXPJ
Model 58BXPJ
3.2
/
3-2
SECTION 3
OPERATION
a. Model58BXPJ: Open compartment
door and pull out power cord perma-
nently attached to Model 58BXPJ .
b .
Model 58BXPJR : Connect and
secure connector end of cable to the
Model 58BXPJR receptical located
on rear . (Cable is supplied with the
Model 58BXPJR) .
c. .TTS 58AXPJ : Connect AC power
cord to commercial power outlet.
IMPORTANT
Internal 115/230 V ac sel-
ector switch is set to 115 V
ac at factory. For 230 V
ac operation, set must be
removed from case and
slide switch activated to
desir ed position.
d . Model 58BXPJ, Model 58BXPJR:
Insert 310 plug on other end of cable
into 58B jack designated 58BXPJ
power. In the case of the Model
58BR, the power jack is available
on . rear of set as well as on front
panel .
e. Turn power switch on .
TTS 58AXPJ: If used with TTS58A
Impuls e Counter, patch between 310
jack designated TTS 58A power
located on TTS 58AXPJ front panel
to TTS 58A 310 POWER jack desig-
nated -48V POWER . Negative
voltage appears on the tip and sleeve
is ground in all cases . This feature
provides for operating the TTS 58A
off commercial power if desired .
f .
Apply power to the TTS 58A.
Model 58B or Model 58BR .
(See Model 58B, Model 58BR or
TTS 58A operating instructions.)
3. 3 Connect the external line to b e tested
to the 310 LINE jack or to the TIP -RING-
SLEEVE binding post of the phase measuring
set.
3. 4 If the connection is to be dialed:
a. Connect a dial or tepephone
3.5
set to the 310 jack designated DIAL .
b. Place FUNCTION switch to DIAL
position . (This transfers the LI NE
terminals to the DIAL jack) .
c. Activate toggle switches for
desired functions i.e. TERM, HOLD,
MEAS. PHASE.
d . Dial the desired number .
e
When line connection has been
established, place FUNCTION
switch to TEST (1000Hz) position .
NOTE :
Test frequency dialed .
must be 1000H z ±10% .
f. The dial may now be remov ed .
The internal hold circuit will main-
tain the connection .
TO MEASURE PHASE JITTER
a. With . the switch in the READ
position, slowly rotate the control
R30, (located near the meter) over
it
1 s
entire range until frequency
lock is indicated and then carefully
adjust for minimum reading. Read
phase jitter in peak to peak degrees
directly on meter .
NOTE:
Frequency lock is indicated
when meter reads on scale .
If unable to adjust for frequency
loc k, follow steps (b) and (c).
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TTS 58AXPJ
Model 58BXPJ
b . WithREAD switchintheADJUST
FOR MINIMUM position, slowlv
adjust control for minimum meter
readin~ (~~·t. <1 ~,.- ,,_t./l,C(_,J;_(/~(/ ~ / t:J />-j=')
c . Place switch in the READ position
and readjust for minimum reading· ~
Read phase jitter in peak to peak
degrees directly on meter .
3 . 6
TO MEASURE PHASE SHIFT DUE
TO IMPULSE.
a . Patch cord between phase mea-
suring set TIP-RING binding posts
or jack for 310 plug designated
OUTPUT and the LINE input of the
IMPULSE COUNTER (58B, 58BR,
TTS 58A, etc.)
Section 3
c. Set Model58B front panel controls
as follows:
1. Turnbutton switch to MEAS.
position.
2. Depress pushbuttons for
600r.l BRDG and BAL XFMR.
3. NETWORK switch set to
EXT . position.
4. Set BLANKING INTER VAL
for desired count rate, between
4 pps to 100 pps.
5. Set SELECTOR switch to
Channel A .
6 .
Set MIN . . LEVEL control
(IMPULSE NOISE) and INCRE-
MENT control to sensitivity
corresponding to desired span
of degrees to be measured.
(See Table 3-2)
b. TTS 58A: Set front panel controls
as follows:
3 . 7 Adjust for minimum reading as
outlined in paragraph 3. 5 a . and b . above .
1 .
INPUT switch set to 60.0 r.l
2. Place BRDG- TERM switch
to BRDG position .
3;
WTG switch set to EXT
position
4. Connect strap bE;)tween IN
and OUT binding posts
5. Set channels A, B, and C
sensitivity controls and main
sensitivity control to cover
desired span of degrees to be
measured. (See Table 3-1)
TABLE 3-1
Main Sens. Control Channel Sens. Controls
70
70
70
Min. Level
(Impulse Noise dBrn)
70
70
70
70
c
B
A
10
6
0
TABLE 3-2
Increment
Thresh. Level
12
8
4
0
NOTE :
Peak to peak phase jitter
reading on meter must be
below the span of interest .
when making phase hits
measurements.
Channel Sens .
Corresponding
Phase Hits
80 dBrn
76 dBrn
70 dBrn
Channel
Sens .
D
-82 dBrn
C-78 dBrn
B-74 dBrn
A-70 dBrn
Corresponding
Phase Hits
zo
0
12.5
0
80
5
0
3-3