Yaesu VXR-7000U User manual

VXR-7000U
Operating Manual
YAESU MUSEN CO., LTD.
4-8-8 Nakameguro, Meguro-Ku, Tokyo 153-8644, Japan
YAESU U.S.A.
17210 Edwards Rd., Cerritos, CA 90703, U.S.A.
YAESU EUROPE B.V.
P.O. Box 75525 1118 ZN, Schiphol, The Netherlands
YAESU UK LTD.
Unit 12, Sun Valley Business Park, Winnall Close
Winchester, Hampshire, SO23 0LB, U.K.
YAESU GERMANY GmbH
Am Kronberger Hang 2, D-65824 Schwalbach, Germany
YAESU HK LTD.
11th Floor Tsim Sha Tsui Centre, 66 Mody Rd.,
Tsim Sha Tsui East, Kowloon, Hong Kong
Contents
Introduction
Controls & Connectors
Front Panel
Rear Panel
ACC Connector Port
LINE Interface Port
Installation
Antenna Considerations

VXR-7000U FM REPEATER OPERATING MANUAL 1
AC Power Supply Voltage Selection
DC Power Supply Backup
Equipment Location
Changing Switching Regulator unit AC Mains Jumper Wiring
CE-27 Programming Software Instruction
Channel Data Items
Duplexer Installation
Specifications
Accessories
Introduction
The VXR-7000 is commercial quality 50-watt FM repeater designed to provide reliable, continuous-
duty two-way communications over a wide range of environmental conditions.
Designed to be a stylish base station, with high-grade components utilized throughout, the VXR-7000
utilizes the latest computer-aided design and manufacturing processes to ensure a high level of
reliability for users. Important channel frequency data is stored in EEPROM, and is easily
programmable by a Servicing Technician or Dealer using an IBM compatible personal computer and
the VPL-1 Programming Cable and CE-27 Software.
Please take a few minutes to read this manual carefully. The information presented here will allow you
to derive maximum performance from your VXR-7000. After reading it, keep this manual handy for
quick reference, in case questions arise later on.
Important Note: Internal service work, programming, and accessory installations should only be
performed by your authorized Vertex Dealer. Dangerous conditions and/or possibly illegal operation
may result from improper setup, programming, or internal modifications.
Controls & Connectors
Front Panel
1: POWER Switch
This is the main power switch for the repeater.

VXR-7000U FM REPEATER OPERATING MANUAL 2
2: LED Indicators
AC: This LED glows green during AC operation.
DC: This LED glows yellow during DC operation.
3: MIC Jack
This 8-pin modular jack accepts the microphone input, and provides a standby control line to activate
the transmitter when using the “BASE” mode of operation. This jack also provides a “Hook” control
line, as well as a “Clone Data” line.
4: BASE/REPEATER Switch
This switch toggles the operating mode between the “REPEATER” mode and the “BASE”
transceiver mode. When the “REPEATER” mode is selected, the LED above it glows green. While
in the “BASE” mode (the green LED is off), you can speak into the microphone to use it as a
transceiver. For normal repeater operation, set this switch to the “REPEATER” mode.
5: LOCAL/REMOTE Switch
This switch toggles the control mode between the “REMOTE” mode and “LOCAL” mode. When the
“LOCAL” mode is selected, the LED above it is off, and the repeater operates according to the
control data programmed into the repeater. While in the “REMOTE” mode, the LED glows green,
and the repeater operates according to the control instructions received from an external device
(connected to the ACC jack on the rear panel).
6: MONITOR Switch
This switch selects the “Squelch” (receiver mute) mode. When the green LED above it is off, “Tone”
or “Coded” squelch is active. When you press this switch momentarily, the green LED will glow
steadily; in this condition, only “noise squelch” is active, and any signal present on the channel will
be heard. If you press and hold this switch for more than 2 second, the green LED will blink and the
squelch will open; in this condition, background noise will be heard if no signal is present.
7: ACCESSORY Switch
This switch can be set up for special applications, such as High/Low power selection, as determined
by your Vertex Standard dealer. The LED above it glows green when this function is activated. For
further details, contact your Vertex Standard dealer.
8: VOL Knob
This control knob adjusts the receiver volume level from the front panel speaker. If desired, this
control knob may be set fully counterclockwise when repeater monitoring is not needed.
9: SQL Knob
This control knob selects the noise squelch threshold level. Set it to a position just above the point
where the BUSY lamp goes out when no signal is present.
10: Channel Selector Buttons (^ and v)
Press one of these buttons to select the operating channel.
11: Channel Indicator
This seven-segment LED indicates the operating channel number.
12: ANI Display
The ANI LCD (Liquid Crystal Display) indicates the pre-programmed ANI message according to the
ANI code received.
13: TX/BUSY Indicator
The BUSY indicator glows green when the channel is busy, and the TX indicator glows red when the
repeater is transmitting.
14: ANI RESET Button
(1) ANI
Press this button to clear the message on the ANI display, and turn off the LCD backlight.
(2) ENI
Press this button to turn off the Alert tone.

VXR-7000U FM REPEATER OPERATING MANUAL 3
Press this button again to clear the message on the ANI display, and turn off the LCD backlight.
Rear Panel
1: EXT SP Jack
This 3.5-mm, 2-pin jack provides variable audio output for an external speaker. The audio output
impedance at this jack is 4ohms ~ 16ohms and level varies according to the setting of the front
panel’s VOL control.
2: TX Antenna Jack
This N-type coaxial jack provides the transmitting output signal for connection to the transmitting
antenna or TX jack on the duplexer, if used. The output impedance requirement is 50 W.
3: RX Antenna Jack
This N-type coaxial jack accepts the receiver input signal from the receiving antenna or RX jack on
the duplexer, if used. The input impedance requirement is 50 W.
4: ACC Jack
This DB-25 connector provides a data interface between the microprocessor in the VXR-7000 and
peripheral devices (such as the VX-TRUNK Unit).
5: LINE Jack
This 8-pin modular jack is used for remote control. It provides TX and RX audio, TX keying, and
squelch status output. The TX and RX audio impedance is 600 W.
6: GND Terminal
For best performance and safety, the GND terminal should be connected to a good earth ground using
a short, heavy, braided cable.
7: AC Jack
This receptacle accepts the AC power cord, which should be connected to the AC mains supply or
wall outlet. The AC line voltage must match that for which the repeater is wired.
8: BATT Terminal
These terminal posts accept 12~ 15 VDC for operating the repeater from a battery or other DC
source. When operating from AC mains, a small trickle current is present at these terminals to
maintain battery charge. A battery rated for 12 volts, 55 Ah (minimum) is recommended for short-
term emergency/backup operation.
ACC Connector Port
The VXR-7000 repeater is provided with a 25-pin DB-25F female connector for interconnections to
accessories. 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 follows:
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
external device’s DC line to prevent damage to the repeater.
Pin 3: TX AF IN [Analog Transmitter Input] (Voice Band: 300 ~ 3,000 Hz)
Input impedance is approx. 600 W. This audio is injected before the splatter filter 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 [Transmitter Input] (Sub-audible Band: 6 ~ 250 Hz)
The input is high impedance (approx. 22 ?W). Injecting too high a voltage here causes over-deviation
of CTCSS or DCS, degrading performance. Use shielded cable to connect to this pin, connecting the
shield to GND.

VXR-7000U FM REPEATER OPERATING MANUAL 4
Pin 5: N.C. (No connection.)
Pin 6: DISC OUT [Analog Output] (Wide-Band: 0 ~ 3,000 Hz)
Received signals with standard deviation produce approx. 1 V p-p audio at this pin. The output
impedance is approx. 600 W, and is extracted before 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 (Receiver Signal
Strength Indicator) is provided on this pin. This low impedance output is generated by the receiver IF
sub-system and buffered 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 external coaxial switching relay. It is an open collector
output, which can sink approx. 10 mA when active. This signal only switches if the repeater has been
programmed for “SIMPLEX” mode. If programmed for “DUPLEX” 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 capable 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 receiver
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 transmitter while the repeater is operating in the “BASE” mode. Avoid voltage in excess of
5 V on this pin, or internal damage to the microprocessor on the repeater CNTL Unit may result.
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 select
one of the 16 pre-programmed repeater-operating channels. The logic truth table below shows the
combinations for selecting all 16 channels. In the truth table, “1” represents no connection, and “l”
represents a ground connection on the pin. The channel selection logic is not inhibited while the
transmitter is keyed: the repeater will change frequency when instructed, even while transmitting.
Avoid voltage in excess of 5 V on these pins or internal damage to the microprocessor on the repeater
CNTL Unit may result.
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

VXR-7000U FM REPEATER OPERATING MANUAL 5
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
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 filter 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 immediately
after 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 digital
data signal is injected after transmitter splatter filter stage.
C
LINE Interface Port
The VXR-7000 is provided with an 8-pin modular jack for line interfacing applications. A Western
Electric modular-type RJ45 plug should be used to connect to this jack. The LINE jack pin-out is
shown below.
Note that there are both 4-line and 8-line types of modular plugs. If a 4-line modular plug is used,
only the LINE OUT and LINE IN connections will be made. An 8-line plug is required to access all
lines. In accordance with standard telecommunications interface, the line connections on the LINE
interface jack are impedance balanced, and are described as follows.
Pins 1 & 2: [RX SQ (+), RX SQ (–)]
An opto-isolator is provided to facilitate E (EAR) signaling. The opto-isolator comes on when a
signal exceeding the receiver squelch appears on the receiver channel (with correct CTCSS tone or
DCS code, if enabled). The RX SQ(Œ) pin is the emitter, and RX SQ(+) is the collector.
Pins 3 & 4: [LINE IN (TX Line Audio)]
Analog signals between 300 and 3000 Hz supplied to this pair are fed to the transmitter when the
repeater is set to the BASE mode (the REPEATER LED is turned off) and keyed either by the TX
KEY input signal (see below), or by the EXT PTT signal on pin 12 of the rear panel’s ACC jack.
Standard deviation is obtained with a line level of -10 dBm.
Pins 5 & 6: [LINE OUT (Rx Line Audio)]
Receiver audio is available from this pair, subject to internal CTCSS or DCS decode if the received
signal strength is above the squelch threshold.

VXR-7000U FM REPEATER OPERATING MANUAL 6
As shipped from the factory, a 1-kHz receiver signal with standard deviation gives Œ10 dBm on the
line, but this can be varied by VR4002 and S4001 (on the repeater’s CNTL Unit).
Pins 7 & 8 [TX KEY (+), TX KEY (-)]
An opto-isolator is provided to facilitate M (MIC) signaling. That is, a voltage presented to these
pins turns on the opto-isolator and keys the transmitter.
The TX KEY (+) pin is the anode of the opto-isolator, and RX SQ(Œ) is the cathode of the opto-
isolator.
Installation
Antenna Considerations
Repeater operation without a duplexer requires that two antennas be installed, one for receiving and
one for transmitting, so that the receiving antenna does not absorb energy from the transmitting
antenna. There are a number of ways to do this, depending on the TX/RX frequency separation, and
on the locations available for antenna mounting. If a duplexer is used, a single antenna suffices for
both transmitting and receiving. If using a reduced-size duplexer, a six-cavity model (minimum) is
recommended. Vertex Standard recommends the use of the duplexer. For further details, contact your
Vertex Standard dealer.
Regardless of the above choice, it is of paramount importance that the antenna(s) be mounted as high
and in the clear as possible, preferably within line-of-sight to all repeater users. Furthermore, losses
in the feedline(s) must be minimized, so the feedline(s) should be high quality, and as short as
possible. If a long feedline is necessary, use coaxial “hardline”, cable to reduce losses.
Repeater antennas should have impedance of 50 ohms at the operating frequency. When separate
receives and transmits antennas are used, high-Q narrow-band types may serve to minimize
interaction. However, when a single antenna is used with a duplexer, it should be a low-Q wide-band
type.
NEVER TRANSMIT WITHOUT HAVING A
TRANSMIT ANTENNA CONNECTED TO
THE TX ANTENNA JACK OF THE
REPEATER.
AC Power Supply Voltage Selection
Each repeater is wired for a particular AC mains voltage between 100 and 253 VAC. This should be
indicated by a label near the AC jack on the rear panel. If no label is present, or if the AC voltage on
the label is different from the local AC line, check the wiring inside the Switching Regulator Unit of
the repeater, and change the connections (and label) if necessary, as shown next page.
Changing the AC input voltage wiring also requires changing the fuse on the FILTER Unit if the
voltage is changed from 100 VAC (100-127 VAC) to 200 VAC (207-253 VAC), or vice-versa. Use a
5-amp fuse for 100 VAC, or a 3-amp fuse for the 200 VAC.
DC Power Supply Backup
For uninterrupted operation during power failures, a 12-volt rechargeable type battery (55-Ah or
more recommended) may be connected to the BATT terminal posts on the rear panel. While the
repeater is operating from the AC source, a slight charging current will maintain battery charge. In

VXR-7000U FM REPEATER OPERATING MANUAL 7
the event of an AC power outage, the automatic power control circuit will automatically switch the
repeater to the backup battery, and operation will not be interrupted.
After prolonged operation from the battery, it should be disconnected from the repeater and recharged
separately before re-connecting, as the trickle charge is not sufficient for recharging a completely
discharged battery.
Never reapply AC power to the repeater with a discharged battery connected, as the DC startup
current can damage the repeater and battery.
While operating from a battery or DC supply, the repeater requires approximately 7 amperes at 12
Volts during transmit.
Equipment Location
While the operating temperature range of the repeater is quite broad, the best location is one in which
the air temperature does not approach the extremes of the specified range, and one that does not
change rapidly. Make sure to allow for free airflow around the heatsink on the rear apron at all times.
In warm climates, the repeater should not be sealed in a small closed room.
Protect the repeater from wind and rain, and extremes in temperature or humidity that may shorten
the useful life of the equipment. Try to locate the repeater in an environment that is also comfortable
for service personnel, if possible.
Changing Switching Regulator unit AC Mains Jumper Wiring
Before attempting this jumper wire change, remove the AC power cord from the AC jack on the rear
panel.
*Referring to Figure 1, remove the 14 screws affixing the top and bottom covers of the repeater, and
remove the covers.
*Remove the eight screws affixing the shield cover for the FILTER Unit, and remove the cover (see
Figure 1).
*Disconnect all wires and connectors from the FILTER Unit, then remove the six screws affixing the
Switching Regulator Unit, and remove it (the Switching Regulator Unit is mounted with the FILTER
Unit: Figure 2).
*Referring to Figure 3, remove the four screws and remove the heatsink from the Switching Regulator
Unit.
*Referring to Figure 4, perform the correct jumper wiring on the Switching Regulator Unit for the AC
Mains voltage used in your area (100-127 VAC or 207-253 VAC).
*Replace the heatsink onto the Switching Regulator Unit, then replace the Switching Regulator Unit
onto the chassis, and connect all wires and connectors to the FILTER Unit.
*Replace the AC fuse (FH6001) on the FILTER Unit according to the AC Mains voltage range:
100 VAC (100-127 VAC): 5A
200 VAC (207-253 VAC): 3A.
*Replace the shield cover and replace the top and bottom covers. This completes the wiring change.
Important! : If you change the AC voltage range, you must also change the AC fuse on the FILTER
Unit. Do not replace with a slow-blow type fuse.
CE-27 Programming Software Instruction
With the CE-27 Programming Software, you can quickly and easily program the Vertex VXR-7000
repeater’s channels and configuration from your personal computer. In the event of an accidental
memory failure, repeater memory and configuration data may be re-loaded in a matter of minutes.
The CE-27 Programming Software diskette contains the following files:
. CE-27.EXE
. CE-27.HLP
Before connecting the VXR-7000 for programming, turn off both the computer and the VXR-7000.

VXR-7000U FM REPEATER OPERATING MANUAL 8
Now connect the VPL-1 Connection Cable to the computer’s serial port and the VXR-7000.
Then it will be safe to restart the computer; turning off the equipment during interconnection avoids
the potential for damage to the electronics caused by voltage spikes.
Insert the distribution diskette into your 3.5” drive (after booting DOS), and make a copy of the
diskette; use the distribution diskette for archive purposes, and use the disk copy for programming.
Place the CE-27 (copy) diskette into your 3.5” drive (usually “Drive A”), and log onto this drive by
typing “A:[Enter]”, then load the contents of the CE-27 diskette into a directory named CE27, using
the COPY command (e.g. “COPY A:\*.* C:\CE27”).
Now type “CE27 [Enter]” to start the program. The introductory screen will appear, and you may
press any key to enter the main screen.
Choose the “Help” contents option (F1) from the program’s Menu for assistance with channel
programming or setting of parameters.
Important Note!
Do not work directly with the CE-27
programming diskette. Make a copy of it and
use the copy when programming the VXR-
7000. Keep it and the original distribution
diskette in a safe place in case you need to
make another copy of it later.
Channel Data Items
Ch: Channel Number
This 2-digit number (01 - 16) is used to identify the channel. Channel numbers occur in sequence, and
their order can not be changed.
Rx Freq.: Edit Receive (or simplex) Frequency
Use the [0] - [9] keys to enter the desired channel frequency directly, and press the [ENTER] key.
CTCSS Decoders: Toggle CTCSS Decoder ON/OFF, sets CTCSS Frequency
Press the [SPACE] bar to toggle the CTCSS Decoder ON or OFF, or press the [ENTER] key to
display the TONE SELECT window, from which you may select a CTCSS frequency using the
[Arrow] key; press [ENTER] again to accept the selected tone, or press [ESC] key to cancel.
DCS Decoders: Toggle DCS Decoder ON/OFF, sets DCS Code #
Press the [SPACE] bar to toggle the DCS Decoder ON or OFF, or press the [ENTER] key to display
the CODE SELECT window, from which you may select a DCS code using the [Arrow] key; press
[ENTER] again to accept the selected code, or press the [ESC] key to cancel.
W/N: Wide/Narrow Channel Spacing
This function selects the channel spacing environment in which the VXR-7000 operates.
W (Wide) = 25 kHz Channel Spacing, ±5 kHz Deviation.
N (Narrow) = 12.5 kHz Channel Spacing, ±2.5 kHz Deviation.
Press the [SPACE] bar to select the desired channel spacing environment.
Clk Sft: Enable/disable the CPU Clock Shift
This function is only used to move a spurious response “birdie,” should it fall on a desired operating
frequency.
NSQ Mode: Noise Squelch Mode
This command adjustment mode for the Squelch threshold level.
User = The squelch threshold level is fixed via a programmable parameter (NSQ LV: 0
[min.] ~ 255 [max.]).
Prpgm = The squelch threshold level can be adjusted via front panel SQL knob temporarily.
Press the [SPACE] bar to select the desired NSQ Mode.
NSQ LV: Noise Squelch threshold level
Use the [0] - [9] keys to enter the desired Squelch threshold level directly, and press the [ENTER] key.

VXR-7000U FM REPEATER OPERATING MANUAL 9
This is an arbitrary adjustment value, which must be set experimentally. Available values are 0 (min.)
~ 255 (max.).
Court Blip: Courtesy Blip
When this parameter is set to “on,” this function causes the VXR-7000 to send out a “blip” on the
portable radio frequency each time the portable radio is unkeyed. This provides audible confirmation
to the user that the VXR-7000 was able to receive the transmission from the portable.
Rev Bst: Reverse Burst.
When this parameter is set to “on,” the CTCSS tone signal’s phase is inverted just before the repeater
turns to receive. This allows the portable/mobile station’s CTCSS Decoder to begin switching off, thus
reducing the transition time required.
DCS Typ: DCS Format
This command is effective only when DCS is chosen for squelch control.
A = “Normal” DCS
B = “Inverted” (complement) DCS
Press the [SPACE] bar to select the desired DCS Type.
DDec Type: DCS Decoder Type
This command selects the manner in which DCS is to be decoded.
Fixed = Decodes the type selected in above parameter (DCS Typ: Normal or Inverted).
Auto = Decodes both types (Normal and Inverted).
Press the [SPACE] bar to select the desired DCS Decoder Mode.
Multi Tone: Enable/disable Multi Tone Operation
Press the [SPACE] bar to toggle Multi Tone Operation ON or OFF, or press the [ENTER] key to
display the MULTI TONE SELECT window, from which you may select a CTCSS tone or DCS code
using the [Arrow] key; press [ENTER] again to accept the selected code, or press the [ESC] key to
cancel.
CWID ANI/ENI: Select the Identicate mode
Press the [SPACE] bar to toggle among CW ID, ANI/ENI or OFF. The CW ID or ANI/ENI feature
must be enabled via the dealer programming.
Action Mode: Select the repeater operating mode
Press the [SPACE] bar to toggle between Duplex operation and Simplex operation.
TX Freq.: Edit Transmit Frequency
Use the [0] - [9] keys to enter the desired channel frequency directly, and press the [ENTER] key.
CTCSS Encoders: Toggle CTCSS Encoder ON/OFF, sets CTCSS Frequency
Press the [SPACE] bar to toggle the CTCSS Encoder ON or OFF, or press the [ENTER] key to
display the TONE SELECT window, from which you may select a CTCSS frequency using the
[Arrow] key; press [ENTER] again to accept the selected tone, or press the [ESC] key to cancel.
DCS Encoders: Toggle DCS Encoder ON/OFF, sets DCS Code #
Press the [SPACE] bar to toggle the DCS Encoder ON or OFF, or press the [ENTER] key to display
the CODE SELECT window, from which you may select a DCS code using the [Arrow] key; press
[ENTER] again to accept the selected code, or press the [ESC] key to cancel.
Base TOT: Enable/disable the Time-Out Timer while operating in the “BASE” station mode
Press the [SPACE] bar to toggle the Base TOT feature between yes and no.
The TOT time is determined via dealer programming.
Base Guard: Enable/disable the Base Guard Feature
When this parameter is set to “yes,” the transmitter will be inhibited for a few seconds before the
repeater (in the “BASE” station mode) turns to receive.
The inhibit time is determined via dealer programming.
LOUT: Select the Lock Out Feature
Press the [SPACE] bar to toggle the Lock Out Feature among BCLO, BTLO, or off. BCLO inhibits
transmitting while there is carrier present. BTLO inhibits transmitting while there is carrier present
unless there also is a valid tone present; this allows the operator to respond to a tone-controlled