Difference between revisions of "RA6790~GM"
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| − | ==A4 ALIGNMENT== | + | ==A4 ALIGNMENT<ref>Gary R. Wingerd, Used with permission</ref>== |
===Pre-Settings=== | ===Pre-Settings=== | ||
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| − | ==A7 ALIGNMENT== | + | ==A7 ALIGNMENT<ref>Gary R. Wingerd, Used with permission</ref>== |
#TUNE THE RECEIVER TO 29.999999 MHz. | #TUNE THE RECEIVER TO 29.999999 MHz. | ||
#CONNECT THE POSITIVE LEAD TO DMM TO TP12 AND THE NEGATIVE LEAD TO GROUND. | #CONNECT THE POSITIVE LEAD TO DMM TO TP12 AND THE NEGATIVE LEAD TO GROUND. | ||
| Line 30: | Line 30: | ||
| − | ==A8 ALIGNMENT== | + | ==A8 ALIGNMENT<ref>Gary R. Wingerd, Used with permission</ref>== |
#CONNECT A SIGNAL GENERATOR TO THE RECEIVER AND SET ITS OUTPUT AS FOLLOWS. | #CONNECT A SIGNAL GENERATOR TO THE RECEIVER AND SET ITS OUTPUT AS FOLLOWS. | ||
Revision as of 15:22, 22 August 2014
Contents
A4 ALIGNMENT[1]
Pre-Settings
- -R-39 MID-RANGE
- -R-47 CCW
- -R-105 CW
- -R-119 MID-RANGE
Steps
- INJECT A FREQUENCY OF 455 KHz CW AT A LEVEL OF -68dBm INTO A4J1 AND SELECT AGC SHORT & BANDWIDTH 4 (6.8 KHz FILTER) ON THE RECEIVER.
- ADJUST R-39 FOR -10dBm ON THE SPECTRUM ANALYZER (IF OUTPUT 50 OHMS AT REAR OF THE RECEIVER).
- CHANGE INPUT LEVEL TO -35dBm AND BANDWIDTH 3 (3.2 KHz FILTER) ON THE RECEIVER.
- CONNECT A DMM TO TP9 AND ADJUST R-47 FOR 8.5VDC ON THE DMM.
- SELECT MAN AGC ON THE RECEIVER AND ADJUST IF GAIN POT FOR 8.5VDC ON THE DMM.
- CONNECT A RF VOLTMETER WITH A HIGH-Z PROBE TO TP7.
- ADJUST R-105 UNTIL LEVEL STARTS TO CHANGE ON RF VOLTMETER.
- SELECT AGC SHORT ON THE RECEIVER AND REMOVE THE INPUT SIGNAL TO A4J1. THE DMM IS STILL CONNECTED TO TP9.
- ADJUST R-119 FO 10.0VDC ON THE DMM.
A7 ALIGNMENT[2]
- TUNE THE RECEIVER TO 29.999999 MHz.
- CONNECT THE POSITIVE LEAD TO DMM TO TP12 AND THE NEGATIVE LEAD TO GROUND.
- ADJUST L5 FOR READING OF 13.5VDC ON THE DMM.
- TUNE THE RECEIVER TO 00.500000 MHz.
- VOLTAGE ON DMM SHOULD BE GREATER THAN 3.00VDC.
- CONNECT THE POSITIVE LEAD TO DMM TO TP5 AND THE NEGATIVE LEAD TO GROUND.
- ADJUST R-16 FOR READING OF 5.2VDC ON THE DMM.
A8 ALIGNMENT[3]
- CONNECT A SIGNAL GENERATOR TO THE RECEIVER AND SET ITS OUTPUT AS FOLLOWS.
- FREQUENCY OF 29.999999 MHz & MODE CW.
- SET THE RECEIVER TO 29.999999 MHz, CW, BFO+1KHz AND SHORT AGC.
- CONNECT A FREQUENCY COUNTER TO THE AUDIO OUTPUT.
- ADJUST TCXO Y1 TO 1.000 KHz ON THE FREQUENCY COUNTER.
- CONNECT THE POSITIVE LEAD OF THE DMM TO TP8 AND THE NEGATIVE LEAD TO GROUND.
- RESET BFO ON THE RECEIVER TO 0.00 KHz OR BFO CENTER.
- ADJUST L4 FOR A READING OF 5.00VDC (+/-0.2VDC) ON THE DMM.