Ranger
RCI-2970
Documentation Project
CBTricks.com
RX Alignment
RX Alignment Locations
| SETTINGS | CONNECTION |
ADJUST
|
ADJUST FOR |
| AM/FM
RF & IF SENSITIVITY: Put mode selector on FM, RF gain fully clockwise, Clarifier at 12 o'clock, frequency at 28.0300 MHz. |
Connect
an FM signal generator to the antenna connector. Set modulation for ±3
kHz, output level at 0.5uV. Connect a SINAD meter to the external speaker jack, volume control at about 10 o'clock. Connect an oscilloscope with a X10 probe to the Cathode of D12. Set sweep selector for 1uS per division and vertical input selector for 10mV per division. |
L8
|
Adjust for best SINAD reading and least distorted waveform on scope. Do not try tuning this coil for maximum, as this will result in degraded receiver performance. |
|
L9,
L11
L12, L13 L14, L4 L3, L5 and L6 |
Adjust for maximum on scope. Reduce generator level if necessary, so as not to exceed vertical height on scope. | ||
|
L5
L6 |
Adjust for best SINAD | ||
| FM
DETECTOR: Mode FM. Set FM RF Generator to 26.965 MHz 0.5uV deviated 3 KHz with 1KHz audio tone. Reduce VOLUME as required. |
L7
|
Adjust for maximum audio output. | |
| SSB
IF SENSITIVITY: Put mode selector on LSB. |
Signal
generator to 28.0290 MHz, modulation off, output level at .5uV. Adjust Clarifier
for best SINAD reading. Connect oscilloscope same as above. |
L15
L16 |
Adjust for maximum on scope. |
| SSB
S-METER: Set mode to USB. Increase RF Generator output to 26.966 MHz100uV (-67 dBm) unmodulated. Set Squelch fully counterclockwise. |
RF Generator to ANT Jack |
VR2
|
Adjust for “S-9” meter reading. |
| AM/FM
S-METER: Set mode to AM. RF Generator output to 100uV unmodulated. Set Squelch fully counterclockwise. |
Same as above |
VR1
|
Adjust for “S-9” meter reading. |
| AM/FM
SQUELCH RANGE: Increase RF Generator output to 10mV. Set Squelch Control fully clockwise. |
Same as above |
VR3
|
Adjust to the squelch just closes. |
| SSB
SQUELCH RANGE: Set mode to USB. |
Same as above |
VR4
|
Adjust to the squelch just closes. |
| NOISE
BLANKER: Set radio to 26.975MHz Set mode to AM. Set RF generator output to 26.965MHz at 1000uV unmodulated. Set NOISE BLANKER switch to “ON”. |
Connect DC Voltmeter to TP1 (Cathode of D2) |
L1,
L2
|
Adjust for maximum DC voltage. |
Disclaimer: Although the greatest care has been taken while compiling these documents,
we cannot guarantee that the instructions will work on every radio presented.