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4. ADJUSTMENT
4-13
4.3.2 Suppressing
interference
Input
Up to two interfering equipment can be connected to the interference rejection circuit in the
transceiver unit via EX KP IN 1 or EX KP IN 2 port. This circuit receives the keying pulse
(KP) from the interfering equipment to reject interference.
H
C
TP2
TB-4
EKP1
EKP2
9
16
CR14
[EKP1]
Photo
Coupler
Flip
Flop
Circuit
H
C
TP4
CR15
S1
[EKP2]
11
12
PCN (66P3924)
Photo
Coupler
Interference rejection circuit
Check of keying pulse
The following keying pulse is required from the interfering equipment.
0 V
less than 1 V
5 to 15V
Keying pulse needed
If the level is out of the ratings or KP output circuit is not provided, take the measures
shown on the next two pages to prevent equipment malfunction.
Buffer circuit for positive-going KP
5 to 15V
CI-8810
2K
H
C
TB4
Interfering
Equipment
Additional Circuit
Interference
Rejector
KP out
Approx.
300
Approx.
300
Содержание CI-88
Страница 4: ...ii SYSTEM CONFIGURATIONS System configuration ...
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Страница 67: ...Takahashi T Y Hatai D 5 ...
Страница 68: ...D 6 19 Mar 2015 H MAKI ...
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