Ranger Communications Texas Ranger TR-127DX, Service Manual

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1.0 GENERAL
Model TR-127GK, TR-127DX
Channels 40
Frequency Range
26.965 – 27.405 MHz
Emission Modes AM
Frequency Control Phase Lock Loop (PLL) synthesizer
Frequency Stability 0.001 %
Operating Temperature Range
-30
°
C to +50
°
C
Antenna Impedance 50 Ohms
Input Voltage 13.8V DC
Antenna Connector Standard SO-239 type
Dimensions 7 1/4”(W) x 9”(D) x 2 1/4”(H)
Weight 3.4 lbs.
1.1 TRANSMITTER
RF Power Output AM : 4 watts
RF Transmit Modes AM
Spurious Emissions - 60dB
Audio Frequency Response 300 to 2500 Hz
Microphone Dynamic
Output Indicators
Meter shows incoming signal strength, RF output
power, and SWR level. Transmit LED glows red
when transmitter is in operation.
1.2 RECEIVER
Sensitivity For 10dB S/N
< 1.0
µ
V
IF Frequency AM: 10.695 MHz 1st IF, 455 KHz 2nd IF
Image Rejection - 50dB
Adjacent Channel Selectivity - 60dB
RF Gain Control 45dB adjustable for optimum signal reception
Automatic Gain Control (AGC) Figure Of Merit 100mV for 10dB Change in Audio Output
Squelch
Adjustable; threshold less than 0.5
µ
V
Noise Blanker RF type
Audio Output Power 2.5W @ 10% THD
Audio Frequency Response 300 to 2500 Hz
Built-in Speaker 8 Ohms, 4 Watts
External Speaker (Not Supplied) 8 Ohms, 4 Watts
(SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE)
TR-127GK/DX CHAPTER 1
SPECIFICATIONS