Comtech EF Data OAC-170D Panduan Memulai Cepat - Halaman 5
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STEP 5
While observing the RSL levels on the CS6716 Modem front Panel display, adjust
RCVR1-RCVR4 potentiometers on the OAC-170D for the lowest common RSL to
within +/- 0.25 dB. Refer to fig 1.2 and fig 1.3.
NOTE: The lowest RSL is the highest numerical value i.e. -74 is lower than -72.
Therefore RCVR-2 and RCVR-3 need to be adjusted from -72 down to -74 in fig 1.2.
When adjusting the potentiometers; Clockwise (CW) increases the level and Counter
Clockwise (CCW) decreases the Level.
STEP 6
On each Down Converter, turn the Noise Test Switch to OFF and tune the receiver
amplifier-converter and frequency synthesizer receive frequency back to the normal
receive frequency.
Figure 1.1
Figure 1.2
Properly gain equalized system
Figure 1.3