Specifications


The VXR-7000repeater is providedwith a25-pin
DB-25Ffemaleconnectorforinterconnectionstoac-
cessories. Use a DB-25M25-pin male connector to
connectaccessories tothe repeater.The pinson the
accessory connectorare explained in detail as fol-
lows:
Pin1:
GND
 Chassisground for alllogic levelsand power
supplyreturn.
Pin2:
+13.8 V

[
PowerSupply
]
 Thispinprovides13.8Volts,1.0A,regulatedDC
fromtherepeatersupply.Usea1Afuseintheex-
ternaldevice’sDClinetopreventdamagetothe
repeater.
Pin3:
TX AF IN

[
AnalogTransmierInput
]

(
Voice Band: 300 ~ 3,000 Hz
)
 Inputimpedanceisapprox.600Ω.Thisaudiois
injected beforethe splaerlter stage, soexcess
signalinputlevelsareclipped.
 Use shielded cableto connect to thispin, and
connecttheshieldto
GND
.
Pin4:
TONE IN

[
TransmierInput
]

(
Sub-audible Band: 6 ~ 250 Hz
)
 Theinputishighimpedance(approx.22kΩ).In-
jectingtoohigh avoltageherecauses over-devi-
ationofCTCSSorDCS,degradingperformance.
Useshieldedcabletoconnecttothispin,connect-
ingtheshieldto
GND
.
Pin5:
N.C.

(
No connection.
)
Pin6:
DISC OUT

[
AnalogOutput
]

(
Wide-Band: 0 ~ 3,000 Hz
)
 Received signals withstandarddeviationpro-
duceapprox.1V
p-p
audioatthispin.Theoutput
impedanceisapprox.600Ω,andisextractedbe-
fore the de-emphasis and squelch circuitry. Use
shieldedcabletoconnecttothispin,andconnect
theshieldto
GND
.
Pin7:
GND
 Chassisground for alllogic levelsand power
supplyreturn.
Pin8:
RSSI

[
AnalogOutput
]
 ADCvoltageproportionaltothestrengthofthe
signal currently being received (eceiver ignal
trengthndicator)isprovidedonthispin. This
lowimpedanceoutputisgeneratedbythereceiv-
erIFsub-systemandbueredbyaninternalop-
amp.Typicalvoltagesaregraphedasfollows:
Pin9:
COAX. SW

[
LogicOutput
(
ActiveLow
)]
 This outputis intended forcontrolling anexter-
nal coaxial switching relay. It is an open collec-
tor output which cansink approx. 10mA when
active. This signal only switches if therepeater
has beenprogrammed for“” mode. If
programmedfor“”, thesignalremains
open(highimpedance)atalltime.
Pin10:
N.C.

(
No connection.
)
Pin11:
NSQ DET
 This is an open-collector,active-low output ca-
pableofsinkingabout10mA.Itindicatesthatthe
receiversquelchisopen.Ifthesquelchcontrolis
properlyset,thisindicatesacarrieronthereceiv-
erchannel.
Pin12:
EXT PTT
 This input isinternallypulled up to 5 VDC.
When pulled low byanexternal device, it keys
therepeatertransmierwhiletherepeaterisop-
eratinginthe“”mode.Avoidvoltageinex-
cessof5Vonthispin,orinternaldamagetothe
microprocessor onthe repeater CNTL Unit may
result.

ACC Jack
DB-25 Pin Numbering
0
(dB )μ
0.5
1.0
1.5
2.0
2.5
-60 -70 -80 -90 -100 -110 -120
(DC V)
Input Signal Level
RSSI Output Voltage