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A
B
Figure7. Downlink frequency low and high-resolution display
For high resolution (B), pressing the left
four least significant digits (i.e., 5225). At high resolution (decimal point flashes
Ï
ON and OFF), pressing the up
or down
up or down in 250 kHz steps (i.e., 5250, 5275, and so on). Pressing and holding
Ï
Ð
down the up
or down
arrow button will increase the step size further.
L-Band frequency: (see Figure 8) For example; if a current L-Band frequency is
1502.25 MHz, changing to Alt-1 Mode (ALT LED flashes) and pressing 4 (to dis-
play Lb1 or Lb2), and then pressing 7 displays the four most significant digits on
the front panel (i.e., 1502.). At low resolution (A), pressing the up
arrow button advances the frequency up or down in 1 MHz steps (i.e., 1503., 1504.,
and so on). Pressing and holding down the up
increase the step size further.
A
B
Figure8. L-Band frequency low and high-resolution display
For high resolution (B), pressing the left
four least significant digits (i.e., 02.25). At high resolution (decimal point flashes
Ï
ON and OFF), pressing the up
or down
up or down in 250 kHz steps (i.e., 02.50, 02.75 and so on). Pressing and holding
Ï
Ð
down the up
or down
arrow button will increase the step size further.
Local Oscillator frequency: (see Figure 10) For example; if a current Local Oscil-
lator frequency is 10.750 GHz, changing to Alt-2 Mode (ALT LED is on) and then
pressing 2 displays the four most significant digits on the front panel (i.e., 10.75).
At low resolution (A), pressing the up
frequency up or down in 10 MHz steps (i.e., 10.76, 10.77, and so on). Pressing and
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holding down the up
or down
ther.
Í
Î
or right
arrow button displays the
Ð
arrow button advances the frequency
Ï
Ï
Ð
or down
arrow button will
Í
Î
or right
arrow button displays the
Ð
arrow button advances the frequency
Ï
Ð
or down
arrow button advances the
Ð
arrow button will increase the step size fur-
A
B
Figure10. Local Oscillator frequency low and high-resolution display
For high resolution (B), pressing the left
four least significant digits (i.e., 0.750). At high resolution (decimal point flashes
ON and OFF), pressing the up
up or down in 1 MHz steps (i.e., 0.751, 0.752, and so on). Pressing and holding
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down the up
Crossover frequency: Because the Crossover and LO frequency ranges are similar,
refer to the above example for changing the Crossover frequency using the high
and low resolution front panel display (see Figure 10).
Ð
or down
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The example that follows is provided to help explain how the Symbol Rate setting
can be changed by switching from lower to higher resolution at the front panel
display. The (default) lower resolution (i.e., four most significant digits) changes
the value up or down in larger steps for making coarse adjustments. When se-
lected, the higher resolution (i.e., four least significant digits) changes the value up
or down in smaller steps for making fine adjustments You can use the left
Î
right
arrow button to change from low to high resolution display. When dis-
playing high resolution (i.e., least significant digits), the decimal point appearing
after the least significant digit flashes ON and OFF repeatedly.
Symbol Rate: (see Figure 9) For example; if the current Symbol Rate is 28.3465
Msymbols/s, changing to Alt-1 Mode (ALT LED flashes) and then pressing 5 dis-
plays the four most significant digits on the front panel (i.e., 28.34). At low resolu-
tion (A), pressing the up
or down in 10 Kbit/s steps (i.e., 28.35, 28.36, and so on). Pressing and holding
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down the up
A
B
Figure9. Symbol rate low and high-resolution display
Í
or right
Ï
Ð
or down
arrow button advances the frequency
Ð
or down
arrow button will increase the step size further.
Ï
Ð
or down
arrow button advances the Symbol Rate up
Ð
or down
arrow button will increase the step size further.
Î
arrow button displays the
Í
or
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