Lafayette Petrusse, Owner'S Manual

Page: 10 / 22

Alignm ent Procedure
1 - Measurement Condition
(1) Reference température_____________ ,25°C
(2) Reference humidity________________ 65%
Note: Unless otherwise specified, alignment may be perfor-
med under the room température of 5 ° - 35° C and the
room humidity of 45 - 80%.
3) Power supply______________ AC 110V or 220V ±3%
2 - Test Equipment. All test equipment should be properly
calibrated.
a) 50 Ohms résistive antenna load, 20W.
b) Frequency counter operable in the required frequency
range.
c) HF signal generator operable over 50 kHz to 60 MHz.
d) Synchroschope, 0-100 MHz, high input Z.
e) FM déviation meter.
f) Digital Voltmeter
g) 8 Ohms 5W résistive speaker load.
h) Two audio signal generators, 10 Hz to 20 kHz, atténu­
ative.
i) .RF Wattmeter, 50 ohm/15 watt, thermocoupled.
j) Circuit tester, input impédance 20 kOhm/V.
k) Regulated DC power supply, more than 4A.
l
) Dummy microphone plugs, receiveand transmit mode.
m) VTVM, 0.1 mV measurabie.
3 - PLL Circuit Alignment
A. [10.24 MHz]
Reference Frequency Adjustment
(Check)
1) Connect ferquency counter to pin terminal be-
tween C-78 and C-79.
2} Check counter reads 10.24000 MHz.
3) Tolérance within ±200 Hz is acceptable. Other­
wise, replace X-1 (10.24 MHz).
B. [10.695/10.6925/10.6975 MHz] Adjustment.
1 ) Connect frequency counter to TP-6.
2) 10.695 MHz: Set the mode selector to CW. Adjust
L-26 to 10.695 MHz + 0 ,-1 0 0 Hz.
3) 10.6925 MHz: Reset Mode Selector to USB.
Adjust L-27 to 10.6925 MHz, + 0, -1 0 0 Hz.
4) 10.6975 MHz: Reset Mode Selector to LSB.
Adjust L-28 to 10.6975 MHz, + 0, -1 0 0 Hz.
C. PLL Input Level Adjustment
1) Set the mode selector to AM, and the clarifier
Control to center, and set the band selector to
Position C of CH 19.
2) Connect synchroscope to TP-4 (pin terminal
between the C-82 anu R-107).
3) Adjust L-16 for maximum RF output.
D. [VC 0] Adjustment
1) Set the mode selector to AM, and the clarifier
control to center, and set the band selector to
position E with CH 40.
2) Connect synchroscope to TP-3.
3} Adjust L-18 for maximum RF output.
4} Connect DC Voltmeter to TP-2 .(pin termin
between the R-109 and R-258 from IC-5).
5) Adjust L-17 to DC 5.0+ 0.1 V.
6) Check A band of CH7, must be DC 1.5V minimur
E. [Off -set Frequency] Adjustment >■
1) Connect frequency counter to TP-3 (pin termin
of L-18).
2) Set the Mode Selector to AM, and the Clarifi
Control to center.
3) Set the Band Selector to position C of CH1
4) Adjust L-19 for 16,040 MHz ±50 Hz.
5) Set the mode Selector to USB.
6) Adjust L-20 for 16.0425 MHz±50 Hz.
7) Set the mode Selector to LSB.
8) Adjust L-21 for 16.0375 MHz±50 Hz.
9) Set the mode Selector to LSB. and transmit
station.
10) Adjust VR-15 for 16.0375 MHz ±50 Hz.
4 . - Transmitter Alignment
A. Testset-up
Connect testing unit to the unit as shown:
Dummy Rlug.
**
А1Л1О Input
(АМ/ЛД/&В) (SS
6
)
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