Iniven IFAR-30 User manual

™ANALOG
RECEIVER
INSTRUCTION MANUAL
IFAR-30
ANALOG
RECEIVER
1. DESCRIPTION
1.1 The IFAR-30 is avariable frequency (5-25 Hz) to sing le
analog (4-20 ma typical) receiver. The IFAR-30 accepts
avariable frequency
input from a matching transmitter
and converts it to a4-20 ma signal.
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. Theoperating
frequency is visually
disJ)layed on the front panel in the cutout of the IFAR-
30.
2. SPECIFICATIONS
INPUT: Variable frequency (5-25 Hz).
OUTPUT:
Current or voltage (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 out of passband.
POWER REQU1REMENT: ±12 Vdc; 105
mao max.
PROTECTION: 1/2 amp fuse located internally.
TEMPERATURE RANGE: -30°C to +70°C
WEIGHT:
Approximately 3Ibs.

3. FEATURES
3.1 Sensitivity Adjustment-A potentiometer located on
the front panel allows the IFAR-30 to be operated with
awide 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
1and 2Tone input
3Positive side af 12 Vdc power supply
4Negative side
af 12 Vdc power supply
3.3 Span
Adjustment-A Span adjustmentaJlows 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
for 0% full scale (4 ma).
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 wiring is done externally
through the rear connector as follows:
TERMINAL SIGNAL
1 +12 Vdc
2-12 Vdc
3&4Tone Jnput
7Analog Output (+)
8Analog Output (-)
13 N.C. Carrier Relay
14 A. Carrier Relay
15 N.O. Carrier Relay
4.2
Sensitivity Adjustment-Sensitivity Adjustment
Procedure As Follows:
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 adjustment is as follaws:
a) Input a 25 Hz signal ta the receiver at TP1.
b) Observe the autput af the receiver at terminals 7(+)
and 8(-) with amultimeter.
c) Adjust pot
R10 until the multimeter indicates 20 mao
4.4 Offset Adjustment- The offset adjustment procedure
is as follows:
a) Input a 5 Hz signal ta the receiver at TP1.
b) Observe the output af the receiver at terminals 7(+)
and 8(-) with amultimeter.
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 aMadeIIFAR-30
receiving at the center frequency af 1775 Hz with
ashift ta 1800
Hz ta receive Mark and ashift ta
1750
Hz ta recelve Space. (±25Hz shift)
2. Special Features or Options
5.2 Refer ta Table 5-2 for complete Iist af available
frequencies.
3.000
5:000
5.2.18
8
2;181
18,
...,.
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)
o0.78
-3 0.55
Table 5~1. Suggested Multiple Tone Transmitter Output
Levels
WHEN INFOAMATION 15 NOT AVAILABLE FROM TElEPHONE CO.
NUMBER OF
TONE
CHANNELS
ON LINE
1
2
Table 5-2.
3
4
5
6ta 7
8ta 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
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z
4i
c
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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
™5Columbia Rd. Somerville,
NJ 08876
908-722-3770 FAX [phone]

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