Data Sheet Chapter 5

4-6 kW UHF Translator Chapter 5, Detailed Alignment Procedures
837B, Rev. 0 5-4
5.0.9 (A11-A2) (Optional) SAW
Filter/Amplifier Board (1035-1211;
Appendix D)
Mounted in: The (A11) IF Filter/ALC
Enclosure (1265-1105).
This board is used for additional adjacent
Channel rejection only if needed and may
not be part of the Tray.
The board contains no tuning
adjustments. The Jumpers W1 and W2
on J4 and J5 are placed for Attenuator In
or Attenuator Out as needed to give the
same output level at J2 as was at J1.
5.0.10 (A2) ±12V Power Supply
Board (1092-1206; Appendix D)
This board contains no adjustments.
Note
: If the (Optional) Frequency
Corrector Kit is part of the tray, perform
the following adjustments. If the
Frequency Corrector Kit is not part of the
tray, the tray is aligned and ready for
normal operation.
5.0.11 (A15) (Optional) IF Carrier
Oscillator Board (1100-1206;
Appendix D)
1. Monitor J3 with a Spectrum
Analyzer and observe the 38.9
MHz Visual IF signal at +5 dBm.
2. Connect a Frequency Counter to J2
on the board or to J9 on the Front
Panel and adjust C17 for 38.9
MHz.
3. Connect a Frequency Counter to J1
and check for the 50 kHz signal.
Adjust C17, if needed, to attain
the 50 kHz frequency. Remove
the Jack on J5. DS2 the Unlock
Indicator should light. Replace the
Jack onto J5.
5.0.12 (A13) (Optional) IF Filter/
Limiter Board (1109-1001; Appendix
D)
1. Monitor the Aural Notch Test
Output of the board at J5 and
move the Jumper W1 on Jack J4 to
between Pins 2 & 3, Test Position.
Adjust C17 to the Aural IF
Frequency, then adjust R10 to
eliminate or minimize the Aural IF
signal. Move the Jumper W1 on
Jack J4 back to between Pins 1 &
2, Operate Position.
2. Monitor the IF CW Output of the
board at J6 with an Oscilloscope
and adjust R12 and C21 for
maximum Video Signal or connect
a Spectrum Analyzer, in Zero
Span, to J6 and adjust R12 and
C21 for Minimum Video Signal
amplitude ripple on the displayed
signal.
3. Adjust R15 for +3 dBm or
Maximum output level if +3 dBm
cannot be attained.
5.0.13 (A14) (Optional) IF PLL Board
(1109-1002; Appendix D)
Check that the Red LED DS1, Unlock
Indicator, located on the board is not lit.
If DS1 is lit, follow the alignment
procedure for setting up the VCXO
Channel Oscillator using R9 on the IF PLL
Board to set up the AFC Voltage for the
Frequency of the VCXO. If it is still lit,
check the 50 kHz reference output of the
(A15) IF Carrier Oven Oscillator. If
needed, follow the alignment procedure
for the IF Carrier Oven Oscillator Board.
5.0.14 (A16) (Optional) IF Amplifier
Board, High Gain (1197-1126;
Appendix D)
This board contains no customer
adjustments. The amplified IF output
from the IF Filter/ALC Board connects to
the IF Filter Limiter Board.