Ranger TR-127GK/DX - Manual (Page 13)

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4.1.2 TRANSMITTER ALIGNMENT
ITEM U.U.T. SETTING
ADJUST
POINT
MEASUREMENT
TX Power Set radio to CH 19 AM TX mode.
Connect RF Power Meter to antenna jack. L26, L27,
L18 MAX > 4W
Balance Power
Between CH. 1 - 40
AM TX Power Set radio to CH 19 AM TX mode. L14 3.8 W
RF Power
Meter Set radio to CH 19 AM TX mode.
Set S/RF /SWR/CAL Switch to S/RF position.
VR5 For a needle reading
of between green and
red area on TX PWR
scale.
AM TX
Modulation
Set radio to CH 19 AM TX mode.
AF signal 30mV, 1 KHz to microphone.
Set MIC Gain fully clockwise.
VR4
For a needle reading
of 90% on the
external modulation
meter.
ANT LED
Set radio to CH 19 AM TX mode.
Connect 150 ohms load to antenna jack
VR6
Adjust very slowly
until ANT LED just
light on.
4.1.3 RECEIVER ALIGNMENT
ITEM U.U.T. SETTING
ADJUST
POINT
MEASUREMENT
AM Sensitivity Set radio to CH 19 AM RX mode.
Set RF GAIN fully clockwise.
Set SQ fully counter-clockwise.
Set VOL Control at 2 o’clock.
Connect RF SG to antenna jack
Frequency 27.185 MHz, 1uV. Mod 30%.
L4, L5,L6,L7,
L8, L9,
L20,L2, L3
VR1
Audio Output > 2V
S/N > 10 dB.
Set radio to CH 40 AM RX mode.
RF SG setting 27.405 MHz.
Set radio to CH 1 AM RX mode.
RF SG setting 26.965 MHz.
L4,L5
For Balance Between
CH 1 and CH 40.
NB Adjust Set radio to CH 19 AM RX mode
RF SG setting 27.205 MHz,
100uV. Mod 30%.
Set switch to NB position.
Connect Oscilloscope to D1 cathode.
L1
Adjust for max.
AM Squelch Set radio to CH 19 AM RX mode.
Set SQ Control fully clockwise.
RF SG setting 27.185 MHz, 1mV. Mod 30%.
VR3 Adjust very slowly
until squelch just
closes.
AM S-Meter Set radio to CH 19 AM RX mode.
RF SG setting 27.185 MHz, 100uV. Mod 30%.
VR2 For a reading of “9”
on the “S” scale.