[R-390] W. RF Alignment (All 65)

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W. RF Alignment
___ 01 Install a 600 ohm resistor on the line level output.
___ 02 Place a meter and 600 ohm load on the Local Audio output TS 585
___ 03 Connect the generator to the receiver's balanced antenna input
___ 04 Place a DC meter on the diode load
___ 05 Turn the receiver on and allow it to warm up for 1 hour
___ 06 Turn the signal generator on and allow it to warm up for 1 hour
___ 07 Set the R390 or R390A Function switch to "MGC
___ 08 Set the R390 or R390A Bandwidth to 2kc
___ 09 Set the R390 or R390A RF gain full CW (Clock Wise)
___ 10 Set the R390 or R390A AF line gain full CW
___ 11 Set the Line Meter range switch to + 10
___ 12 Set the R390 or R390A AF local gain full CW
___ 13 Set the R390 or R390A BFO off
___ 14 Set the Audio response to wide
___ 15 Set the Limiter to off
___ 16 Set the receiver and generator to the same frequency of choice
___ 17 Rock the generator for a peak in to the band pass
___ 18 Set the initial generator output to 10uv
___ 19 Set the generator modulation level to at 30% 400 Hz or 1 KHz
___ 20 Use the Ant Trim to peak the receiver
___ 21 Reduce the signal generator RF output for -7 volts DC

___ 22 Use 550 for L213, L224-1,, L224-2 Slugs 1st Octave
___ 23 Use 950 for C201-B, C230-1, C230-2 Caps 1st Octave
___ 24 Use 1,100 for L215-1, L215-2, L215-3 Slugs 2nd Octave
___ 25 Use 1,100 for C291-1, C291-2, C291-3 Caps 2nd Variable IF
___ 26 Use 1,250 for L232-1, L232-2, L232-3 Slugs 1st Variable IF
___ 27 Use 1,900 for L233-1, L233-2, L233-3 Slugs 2nd Variable IF
___ 28 Use 1,900 for C205-B, C233-1, C233-2 Caps 2nd Octave
___ 29 Use 2,250 for L217, L226-1, L226-3 Slugs 3rd Octave
___ 30 Use 3,800 for C209B, C236-1, C26-2 Caps 3rd Octave
___ 31 Use 4,400 for L219, L227-1, L227-2 Slugs 4th Octave
___ 32 Use 7,250 for C283-1, C283-2, C283-3 Caps 1st Variable IF
___ 33 Use 7,600 for C213B, C239-1, C239-2 Caps 4th Octave
___ 34 Use 8,800 for L221, L227-1, L227-2 Slugs 5th Octave
___ 35 Use 15,200 for C217B, C242-1, C242-2 Caps 5th Octave
___ 36 Use 17,600 for L223, L229-1, L229-2 Slugs 6th Octave
___ 37 Use 30,400 for C221B, C241-1, C241-2 Caps 6th Octave

___ 38 Observe 27 DB (17 Volts AC) on the Local Audio
___ 39 This should also be 450 milliwatts on the Local Audio
___ 40 Observe + 10 on the Line Meter (0 VU + 10 switch)
___ 41 Set the signal generator to CW
___ 42 The Meter on the Local Level should drop 20 DB
___ 43 The Line Meter should drop 20 DB
___ 44 The signal generator RF level should be less than 3 micro volts
___ 45 Record the frequency and the output of the generator in micro volts
___ 46 This value is the 20 DB S/N + N receiver level at this frequency
___ 47 This is the relative receiver noise floor level at this frequency

___ 48 Use the following check the mechanical filters at one frequency
___ 49 Set BANDWIDTH KC switch S501 to position 1.
___ 50 Adjust the signal generator output for -5 volts on the diode load
___ 51 Tune the KILOCYCLE CHANGE to one side of the center
___ frequency until the multi-meter reads 2.5 volts.
___ 52 Note the frequency indicated on the receiver frequency counter.
___ 53 Tune the receiver KILOCYCLE CHANGE control to the other side
___ of the center frequency until the meter reads 2.5 volts.
___ 54 Note the frequency indicated on the receiver frequency counter
___ 55 Subtract the lower from the higher of the two values
___ 56 This is the receiver bandwidth for 1 Kilohertz Band Width 0.8 to 1.3
___ 57 Set BANDWIDTH KC switch S501 to 2 KHz position
___ 58 Repeat steps 50 through 55 for the 2 KHz band width 1.9 to 2.3
___ 59 Set BANDWIDTH KC switch S501 to 4 KHz position
___ 60 Repeat steps 50 through 55 for the 4 KHz band width 3.6 to 4.4
___ 61 Set BANDWIDTH KC switch S501 to 8 KHz position
___ 62 Repeat steps 50 through 55 for the 8 KHz band width 7.5 or more
___ 63 Set BANDWIDTH KC switch S501 to 16 KHz position
___ 64 Repeat steps 50 through 55 for the 16 KHz band width 12 or more
___ 65 No bandwidth test is required for 0.1 KC setting.
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