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The
VXR-7000 is a frequency-synthesised, microprocessor-controlled
commercial-grade repeater designed to provide reliable, continuous 2-
way communications over a wide range of environmental conditions.
The
VXR-7000
integrates well into almost any communications system.
Operating from either the
AC line or 12-V DC source, the VXR-7000 provides up to 50 watts
(standard) and 100 or 200 watts optional power
output. The low power
consumption of the VXR-7000 provides the capability of extended
operation from batteries in the event of power failure, and automatic
switching is provided to shift from the AC to DC supply for
uninterrupted communications. The DC power terminals provide a constant
trickle-current to keep rechargeable batteries in top condition.
Designed for easy installation in EIA-Standard 19-inch rack mount
cabinets, the VXR-7000's ragged construction utilises high-grade
components throughout.
Standard features include
automatic time-out and hang-up delay timers, plus everything needed for
operation as a full-duplex (or semi-duplex) base station transceiver.
CTCSS encoder / decoder for tone squelch operation is built in.
Internal-fit Cavity
duplexers are available for the VXR-7000.
The VXR-7000 offers
highly flexible system configuration by dealer- programming. This allows
customising the repeater to your specific network, and changing system
configuration as your requirements change. Programming is accomplished
using an external IBM PC or compatible computer with the CE-7 software
and VPL-1 connection cable, with all data stored in EEPROM in the
repeater. The VXR-7000 can be re-programmed in seconds, and once programmed, channel data is stored permanently, without
the need for battery backup.
|
inside-underneath view showing (optional) duplexer
25 or 50 Watt unit as desk-top unit |
| GENERAL |
VHF |
UHF |
| Frequency
Range: |
(A)
134 - 147 MHz
(B) 146 - 160 MHz
(BS-1) 156 - 168 MHz
(C) 164 - 174 MHz |
(A)
400 - 420 MHz
(C) 430 - 450 MHz
(D) 450 - 470 MHz
(E) 470 - 490 MHz
(F) 490 - 512 MHz |
| Maximum Channel Spread
(w/o degradation): |
2 MHz |
20 / 22
MHz |
| Number of Channels: |
99 |
| Channel Spacing: |
12.5
kHz, 20 kHz, 25 kHz |
| Frequency Stability: |
±2
ppm (Built-in TCXO) |
| Emission Type: |
F3E |
| Voltage Requirement: |
AC100
/ 117 / 220 / 234 V (50 / 60 Hz) DC 12.8 V neg ground |
| Current
Consumption: |
AC
160 VA max (25W output, standby 30 VA max
DC 6.0 A max (25W output), standby
500 mA max |
| Operating Temperature
Range: |
-30°C
- +60°C (-22°F - 140°F) |
| Duty Cycle: |
continuous |
| Dimensions (WHD
approx.): |
375
x 275 x 110 |
| Weight (approx.): |
12Kg
(26.5 lbs.) |
| RECEIVER |
|
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| Circuit Type: |
Double
Conversion superheterodyne |
| Intermediate
Frequencies: |
21.6
MHz & 455 kHz |
47.9
MHz & 455 kHz |
| Sensitivity: |
0.50
µV for 12 dB SINAD |
| Audio Response
Characteristic: |
750
µS de-emphasis |
| Spurious Rejection: |
better
than 75 dB |
| Adjacent Channel
Selectivity: |
better
than 70 dB |
| Intermodulation
Response: |
better
than 70 dB |
| Receiver S/N Ratio: |
better
than 40 dB |
| TRANSMITTER |
|
|
| RF Power Output: |
50
Watts standard or 100 or 200 options
(continuous delay) |
| FM Noise: |
better
than -40 dB @ 1 kHz |
| Modulations System: |
Direct
frequency modulation |
| Maximum Deviation: |
±2.5kH\
(12.5 kHz spacing), ±4.0 kHz (20 kHz spacing), ±5 kHz (25 kHz
spacing) |
| Transmit Activation
System: |
Carrier
or remote control |
| Audio Response
Characteristic: |
6
- dB / octave pre-emphasis from 300 Hz - 3 kHz (=1.0/-3.0 dB) |
| Audio Distortion: |
Less
than 5% @ 1 kHz |
| Spurious Emission: |
better
than 80 dB (below carrier) |
| Transmit Delay Time: |
100
ms |
| Line Audio Input: |
-10
dBm ±3 dB |
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