Olson Technology S450P Series - Manual (Page 13)

025-000485 REV x1 Page 13
3.5 Output Channel Tuning
Output channel tuning is done with the Output Channel switches; two 8-postion DIP switches located at the
right side of the front panel (Figure2-1). Access the switches by removing the switch cover.
The last three positions of switch 2 (Figure 3-3) are used for FCC offset. The first fixe positions of switch 2
and all of switch 1 are used for tuning the selected output channel.
Set the Output Channel switches for the channel to be tuned as indicated in Table 3-3. In the table a “1”
indicates that the switch is set to the “up” (or “on”) position, a “0” indicates that the switch is set to the
“down” (or “off”) position.
The S450P can be used in either the non-offset or the offset modes. Refer to the following to sections for
the proper settings of the front-panel Offset Switches and Offset Control.
3.5.1 On-Channel Operation
Using the S450P as a processor in the on-channel mode phase locking circuitry locks the oscillators in the
input/IF/output conversion processes and no off set is produced. To operate in the on-channel mode:
1: Set the following output channel as follows:
The output switch settings shown in Tables 3-3 are shown in these positions for those
channels not requiring to have FCC offsets.
2: Turn the front-panel Offset Control fully clockwise.
3.5.2 Offset Mode
Using the S450P as a processor in the offset mode permits adjustment of the IF/output conversion process
so that tunable output offset is enabled. To operate in the offset mode:
1: Set the output channel switches as follows:
The output switch settings shown in Table 3-3 are shown in these positions of those chan-
nels required to have the FCC offsets.
2: To set the offset control for those channels requiring FCC offset, proceed as follows:
A: Connect a frequency counter, capable of counting a modulated carrier at the frequency
of the output channel, to the -20dB test point.
NOTE: It is essential that the frequency counter can accurately count a video modulated carrier, offset control cannot be accu-
rately set otherwise, and failure to meet FCC offset will result.