- 2 -
SPECIFICATIONS
A
GENERAL
Model PPR-125
Channels 40
Frequency Range
26.965 ~ 27.405 MHz
Emission AM
Frequency Control
Phase-Lock-loop (PLL) Synthesizer
Frequency Stability
0.001%
Temperature Range
-30
C to +50
C
Antenna Impedance
50 Ohms
Antenna Connectors
Standard SO-239 type
Input Voltage
13.8V DC
Size
7- 3/8” (W) x 8- 3/4” (D) x 2- 1/4” (H)
Weight 4.2
lbs.
TRANSMITTER
RF Power Output
4W
Spurious Emission
-60 dB
Audio Distortion
10%
Frequency Response
300 to 2500 Hz
Microphone Dynamic
RECEIVER
Sensitivity for 10 dB (S+N)/N
< 1.0 uV
Squelch Sensitivity
< 0.5 uV
Image Rejection
More than 65 dB
AGC Figure of Merit
100 mV for 10dB Change in Audio Output
Audio Power Output
3W @ 10% Distortion
Audio Response
300 to 2500 Hz
(SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE)
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INSTALLATION
A
LOCATION
Plan the location of the transceiver and microphone bracket before starting the
installation. Select a location that is convenient for operation and does not interfere with
the drive or passengers in the automobiles, the transceiver is usually mounted the dash
panel with the microphone bracket beside it.
MOUNTING THE RADIO
The transceiver is supplied with a universal mounting bracket. When mounting the
bracket and radio to your car, make sure it is mechanically strong. Also provide a good
electrical connection to the chassis of the vehicle. Proceed as follows to mount the
transceiver:
1.
After you have determined the most convenient location in your vehicle, hold the
transceiver with mounting bracket in the exact location desired. If nothing will
interfere with mounting it in the desired position remove the mounting bolts. Before
drilling the holes, make sure nothing will interfere with the installation of the
mounting bolts.
2.
Connect the antenna cable plug to the standard receptacle on the rear panel. Most
transceiver antennas are terminated with a type PL-259 plug and mate with the
receptacle.
3.
Connect the red DC power input wire (with the fuse) to +13.8V DC. This wire
extends from the rear panel. In automobile installation, +13.8V DC is usually obtained
from the accessory contact on the ignition switch. This prevent the set being left on
accidentally when the driver leaves the car and also permits operating the unit without
the engine running. Locate the accessory contact on most ignition switches by tracing
the power wire from the AM broadcast receiver in the car.
4.
Connect the black lead to –13.8V DC. This is usually the chassis of the car. Any
convenient location with good electrical contact (remove paint) may be used.
5.
Mount the microphone bracket on the right side of the transceiver, using two screws
supplied. When mounting in an automobile, place the bracket under the dash so that
microphone is readily accessible.