Specifications

 

Pin13:
GND
 Chassisground for alllogic levelsand power
supplyreturn.
Pin14:
GND
 Chassisground for alllogic levelsand power
supplyreturn.
Pin15:
N.C.

(
No connection.
)
Pin16,17,18,&19:
REMOTE CH DATA

[
LogicInputsD3,D2,D1,andD0
](
Active Low
)
 Theseinputsareinternallypulledupto5-VDC.
Whenpulledlowbyanexternaldevice,theyse-
lectoneofthe16pre-programmedrepeateroper-
atingchannels.Thelogictruthtablebelowshows
thecombinationsforselectingall16channels.
 In thetruth table, “1”represents no connection,
and “0” representsaground connection on the
pin.
 Thechannelselectionlogicisnotinhibitedwhile
thetransmieriskeyed:therepeaterwillchange
frequencywheninstructed,evenwhiletransmit-
ting.
 Avoid voltage in excess of 5V on these pins or
internaldamagetothemicroprocessoronthere-
peaterCNTLUnitmayresult.
Pin20:
GND
 Chassisground for alllogic levelsand power
supplyreturn.
Pin21:
A-OUTPUT

[
LogicOutput
](
Active Low
)
 This open collector logic outputis pulled low
when the front panel’s
ACCESSORY
 key is
turnedon.Itcansinkapprox.10mAwhenactive.
Pin22:
RXD LOW

[
DigitalOutputforDATACommunications
]

(
300 ~ 3,000 Hz
)
 Thispinisanoutputforlowspeedreceivingdata
signals, with the data being extracted after the
de-emphasisandlowpasslterstages.
Pin23:
RXD HI
 [DigitalOutputforDATACommunications]
 This pin is an output for high speed receiving
data signals, with the data being extracted im-
mediatelyaerthediscriminatorpriortoanyde-
emphasis).
Pin24:
TXD LOW

[
DigitalInputforDATACommunications
]

(
300 ~ 3,000 Hz
)
 This pin is intended to be used as a low speed
digitaldata signal inputtothe repeater.This
digital data signal is injected beforetransmitter
pre-emphasisandlimitingstage,soexcesssignal
inputlevelsareclipped.
Pin25:
TXD HI

[
DigitalInputfortheDATACommunications
]
 This pin isintended to beused asa high speed
digitaldatasignalinputtotherepeater.Thisdigi-
taldatasignalisinjectedaertransmiersplaer
lterstage.
Channel
Pin 16
(
D3
)
Pin 17
(
D2
)
Pin 18
(
D1
)
Pin 19
(
D0
)
1 1 1 1 1
2 1 1 1 0
3 1 1 0 1
4 1 1 0 0
5 1 0 1 1
6 1 0 1 0
7 1 0 0 1
8 1 0 0 0
9 0 1 1 1
10 0 1 1 0
11 0 1 0 1
12 0 1 0 0
13 0 0 1 1
14 0 0 1 0
15 0 0 0 1
16 0 0 0 0