Uniden PB010, Руководство по обслуживанию

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ALIGNMENT PROCEDURE
NOTES: PBOIO = Cobra 148GTL-DX, Superstar 360FM.
PC999 = President Grant.
PB042 = President Jackson.
n/a = not applicable.
I . P L L SYNTHESIZER ALIGNMENT
Required test equipment:
1. 0-5 MHz oscilloscope.
2. Digital DC Voltmeter.
3. Frequency counter, DC - 30 MHz, 25 mV sensitivity
STEP PRESET
PB010 PC99 9 PB042
CONDITIONS
PROCEDURE PROCEDURE
PROCEDURE
1. RX Mode, AM.
MID Band, Ch. 19. MID Band, Ch. 19.
' C Band, Ch. 19.
Clarifier control(s)
Connect 'scope to TP4 Connect 'scope to TP4
n/a
at center detent.
(top bare lead of R124) (top bare lead of R121)
Adjust L17 for max. Adjust L17 for max.
(0.9V p-p typical) (0.9V p-p typical)
2. Same as Step 1, except: Connect DC .voltmeter
Connect DC voltmeter Connect DC voltmeter
Switch to Ch. 40. to TP2 (top bare lead
to TP2 (top bare lead to TP2 (top bare lead
of R126). Adjust L18 or R127). Adjust L18
of R 122). Adjust L12
for 5.40 V D C . for 4.85 VDC.
for 5.40 VDC.
3.
Same as Step 1. Connect 'scope to TP3
Connect 'scope to TP3 Connect 'scope to TP3
(top bare lead of R84) . (bare jumper JP47).
(top bare lead of R73).
Adjust L19 for max. Adjust L19 for max. Adjust L13 for max.
(1.0V p-p typical.) (1.0V p-p typical.)
(2.8V p-p typical.)
4. Return to Ch . 19.
OFFSET ADJUSTMENTS: These are the same for each chassis, except that
Clarifier control(s)
the PC999 will require two sets as described, sińce it has 2 crystals.
at center detent.
Remove 'scope from TP3 and attach Frequency Counter to this point now.
AM: Adjust L21 for
Adjust L25 MID band & Adjust L14 for
16.4900 MHz.
L22 LOW band for
16.4900 MHz.
16.4900 MHz.
USB:
Adjust L22 for Adjust L26 MID band & Adjust L15 for
16.4925 M H z . L23 LOW band for
16.4925 MHz.
16.4925 MHz.
LSB :
Adjust L23 for Adjust L27 MID band & Adjust L16 for
16.4875 MHz
L24 LOW band for
16.4875 MHz.
16.4875 MHz.
5.
Switch to LSB, TX Mode.
Adjust VR6 for Adjust VR6 for
Adjust VR6 for
16.4875 MHz. 16.4875 MHz.
16.4875 MHz.
6.
Return to RX Mode.
CARRIER OSCILLATOR OFFSETS: These are the same for every chassis. For
AM, it will not be possible to read the 10.695 MHz signal directly as
it is with USB or LSB/CW. Therefore, the easiest AM adjustment will be
to tune the appropriate AM coil in the TX Mode for exact center channel
frequency. If the 16 MHz adjustment of Step 4 was properly made, the
AM Offset will automatically be 10.695 MHz as required. For USB and
LSB/CW, the adjustment can be made in the RX mode.
USB:
Connect Freq. Counter
Connect Freq. Counter
Connect Freq. Counter
to TP6 (bare top lead to TP6 .(bare top lead
to TP4 (bare top lead
of R6 0 ) . Adjust L38
of R60). Adjust L29
of R105). Adjust L23
for 10.6925 MHz.
for 10.6925 M H z . for 10.6925 MHz.
LSB/CW:
Adjust L39 for
Adjust L30 for
Adjust L24 for
10.6975 MHz.
10.6975 MHz. 10.6975 MHz.
AM :
TX Mode. Adjust L37
TX
Mode.
Adjust L20
TX Mode. Adjust L22
for 27.1850 MHz.
for 27.1850 MHz.
for 27.1850 MHz.