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NGT—Checks and adjustments
152
NGT Transceiver System Technical Service Manual
Crystal oven
The crystal oven (drawings
) on the RF/IF PCB (drawing
) is attached to the reference crystal Z1.
The oven should be checked after a warm-up period of five minutes.
The operating temperature of the oven should be 70°C
±
5°C (158°F ± 41°F).
The Crystal Oven Assembly (drawing
) is used on the RF/IF PCB (drawing
) and contains the reference crystal Z1.
The oven should be checked after a warm-up period of five minutes.
The operating temperature of the oven should be 70°C
±
5°C (158°F ± 41°F).
Low-pass filters
There are two 30 MHz LPFs. Both are located on the RF/IF PCB in the RF unit. One is
located in the receiver input and the other is located in the exciter output.
Alignment of the LPFs is not necessary. Each coil (L106 and L114) is pre-aligned to a
frequency of 45 MHz.
ALTERNATIVE TEXT
ALTERNATIVE TEXT
NOTE
If the PCB issue status is -06 or earlier, see drawing
.
ALTERNATIVE TEXT
NOTE
If the PCB issue status is -06 or earlier, see drawing
.
Содержание NGT 2010 RF
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