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For high resolution (B), pressing the left or right arrow button displays the
four least significant digits (i.e., 5225). At high resolution (decimal point flashes
ON and OFF), pressing the up or down arrow button advances the frequency
up or down in 250 kHz steps (i.e., 5250, 5275, and so on). Pressing and holding
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 or down
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 or down arrow button will
increase the step size further.
For high resolution (B), pressing the left or right arrow button displays the
four least significant digits (i.e., 02.25). At high resolution (decimal point flashes
ON and OFF), pressing the up or down arrow button advances the frequency
up or down in 250 kHz steps (i.e., 02.50, 02.75 and so on). Pressing and holding
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 or down arrow button advances the
frequency up or down in 10 MHz steps (i.e., 10.76, 10.77, and so on). Pressing and
holding down the up or down arrow button will increase the step size fur-
ther.
For high resolution (B), pressing the left or right arrow button displays the
four least significant digits (i.e., 0.750). At high resolution (decimal point flashes
ON and OFF), pressing the up or down arrow button advances the frequency
up or down in 1 MHz steps (i.e., 0.751, 0.752, and so on). Pressing and holding
down the up or down arrow button will increase the step size further.
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).
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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 or
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 arrow button advances the Symbol Rate up
or down in 10 Kbit/s steps (i.e., 28.35, 28.36, and so on). Pressing and holding
down the up or down arrow button will increase the step size further.
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