™ ANALOG
RECEIVER
INSTRUCTION MANUAL
IFAR-30
ANALOG
RECEIVER
1. DESCRIPTION
1.1
The IFAR-30isa variable
frequency
(5-25 Hz)tosing
le
analog (4-20
ma
typical) receiver.
The
IFAR-30 accepts
a variable frequency
input
from a
matching
transmitter
and
converts it to a 4-20masignal.
1.2 The IFAR-30
is available in
narrow
and
broad
band
channel
spacings af 100 Hz, 120 Hz, 170 Hz, 240 Hz,
and 340
Hz.
The operating
frequency
of
the unit
is
rl'C;termined by two
plug-in
modules. an IF-10
filter
and
10-30descriminator. The operating
frequency
is visually
disJ)layed on the front panel in the
cutoutofthe IFAR-
30.
2.
SPECIFICATIONS
INPUT: Variable
frequency
(5-25 Hz).
OUTPUT:
Currentorvoltage (4-20 ma standard
into
500
ohm
load).
ACCURACY:±0.1
% at room temperature.
± 0.5% at extreme
temperature
points.
SENSITIVITY:
Continuously
adjustable to -40 DBM
INPUT
IMPEDANCE: 600 ohms
nominal
with
rising
characteristics
outofpassband.
POWER REQU1REMENT:
± 12 Vdc; 105
mao
max.
PROTECTION:
1/2
amp
fuse located internally.
TEMPERATURE
RANGE:
-30°C
to +70°C
WEIGHT:
Approximately
3 Ibs.
3.
FEATURES
3.1
Sensitivity
Adjustment-A
potentiometer
located on
the front panel allows the IFAR-30 to be operated with
a wide range
of
input levels.
3.2 Test
Socket-A
TEST socket located on the front
panel of the IFAR-30 provides the user access to the
following important measurements
without
disengaging
the
unit from the system:
PIN NUMBER FUNCTION
1 and 2 Tone
input
3 Positive sideaf12 Vdc power supply
4 Negative side
af12Vdc power supply
3.3 Span
Adjustment-A
Span adjustment aJlows the user
ta calibrate the receiver for
100%
tuli scale (20 ma).
3.4 Offset
Adjustment-An
offset adjustment allows the
user to calibrate the receiver
for0%full scale(4ma).
3.5 Carrier
Relay-A
carrier relay ensures transmitterl
receiver continuity.
R1-
r{'3
s-
'),5>
II%.
o--....
3-(.S"'''Cl--~Vl':1
j
....
k
__
.::.I.
/~/J.JT
4.
INSTALLATION
4.1
Electrical
lnstallation-AII
wiringisdone externally
through
the rear connectorasfollows:
TERMINAL SIGNAL
1
+12
Vdc
2 -12 Vdc
3
& 4 Tone Jnput
7 Analog Output
(+)
8 Analog Output (-)
13
N.C. Carrier Relay
14
A.
Carrier Relay
15 N.O. Carrier Relay
4.2
Sensitivity
Adjustment-Sensitivity
Adjustment
ProcedureAsFollows:
a)
With transmitter
of
matching frequency on-line,
rotate
pot
on faceplate
counter-clockwise
until
carrier
relay de-energizes.
b) Rotate pot clockwise until carrier relay energizes.
4.3 Span
Adjustment-
The
Span adjustmentisas
follaws:
a)
Input a25Hz
signal ta the receiveratTP1.
b)
Observe the
autputafthe receiver at terminals 7(+)
and 8(-) with a multimeter.
c) Adjust pot
R10
until the multimeter indicates20mao
4.4
Offset
Adjustment-
The offset adjustment procedure
isasfollows:
a)
Input a 5Hzsignal ta the receiver at
TP1.
b)
Observe the
outputafthe
receiver at terminals 7(+)
and
8(-) with a multimeter.
c) Adjust pot
R13
until the multimeter indicates 4
mao
5. ORDERING INFORMATION
5.1
When ordering please specify:
1.
Madel
Number-Center
Frequency-Shift,
Le.
IFAR-30-1775-25 would specify a MadeIIFAR-30
receiving at the center frequency af 1775 Hz with
a shift ta 1800
Hz
ta receive Mark and a shift ta
1750
Hz
ta recelve Space. (±25Hz shift)
2.
Special FeaturesorOptions
5.2
Refer ta Table 5-2
for
complete Iist af available
frequencies.
3.000
5:000
5.2.18
8
2;181
1
8
,
...,.
r--'\JI
Kl
U4
~.
0:: U
CX
I'\JI
r'\JI
t'oo..
_
•
•
•
~
Q
~O:O~O
e~
DO~.
~
IR
D~
•
Q
Dl
1
.J
lr~
C9
-.
U
UU3
C6
'U5
R13
RECOMMENDED LEVELS
DBM RMS VOLTS
(600,u)
o 0.78
-3
0.55
Table
5~1.
Suggested
Multiple
Tone Transmitter Output
Levels
WHEN INFOAMATION15NOT
AVAILABLE FROM
TElEPHONE
CO.
NUMBER OF
TONE
CHANNELS
ON LINE
1
2
Table 5-2.
3
4
5
6 ta 7
8 ta 10
12
ta 16
17 ta
25
-5
-6
-7
-8
-10
-12
-13
0.45
0.40
0.35
0.30
0.25
0.20
0.17
o
z
4i
c
c
(Q
.r:.
o
Channel Center
Frequency
(Hz)
Series
35
Half
Band
or
Width
25
30
42
60
85
Channel
Spaclng
(Hz)
100 120
170
240
340
Baud
Rate
50
60
80 120
170
-01
365
420
425
480
850
-02
465
540
595
720
1190
-03
565
660
765
960
1530
-
-04
665
780
935
1200
1870
-05
765
900
1105 1440
2210
-06 865
1020
1275
1680
2550
-07
965
1140 1445
1920
2890
-08
1075
1260
1615
2160
3230
-09
1175 1380 1785
2400
-10
1275 1500
1955
2640
I
--
-11
1375
1620
2125
2880
-12
1475
1740
2295
3120
-13
1575
1860
2465
3360
-14
1675 1980
2635
-15
1775
2100 2805
-16 1875
2220
2975
-17
2000
2340
3145
--
-18 2100 2460
3315
-19
2200
2580
3485
-20
2300
2700
-21
2400 2820
-22
2500
2940
-23
2600
3060
-24
2700
3180
-25
2800
3300
-
-26
2900
3420
-27
3000
-28
3100
-29
3200
-30
3300
-31
3400
-32
3500
INIVEN
™
5 Columbia Rd. Somerville,
NJ
08876
908-722-3770 FAX 908-722-5461 800-526-3984
o
n-<
c
;Q
",.
.....
€.
1)
'"
,...
;a
i>
A
~{»):.
"-r-
, I
r-
Oll>!
o
Nt\JO
~~D
t.,.~ClI
~ll.~
~~~
'"
Itl
z
r------:..,.....-i~E:}
s
}CEN
RELAY
CONiACTS
..
ta
;::;
l"'
V'l
~
'-
....
c
.....
<.c
I
......
ooj
~
I\J
:It
rv
i
1
=
0
•
.....
:n
:f
<
II
•
Loading...