Section 20 - Appendix C–Filter Board Options PWA 148921-01
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20.4 General Procedure
Follow these steps, in the order below, to program the monitor to operate with or without
filters. After choosing the filter type and the location of the Integrator/Gain Stage you
can check the signal flow path using Figure 1 in Section 20.3.
NOTE: Because the calibration procedure requires changing the filter settings, it
is recommended that the monitor be calibrated before configuring the filter (See
Section 15).
1. Remove the monitor from the rack and disassemble it to allow access to the
jumpers on both the Main and Filter boards (See Section 6).
2. Choose the filter type (See Section 20.5). The options are
• High-Pass (HP) filter
• Low-Pass (LP) filter
• Band-Pass (BP) filter
• No filters
3. Set the Integrator/Gain Stage (See Section 20.6). The options are
• Integrator/Gain Stage with NO filters
• Filter after Integrator/Gain Stage
• Filter before Integrator/Gain Stage
• High Pass filter before Integrator/Gain Stage and Low Pass filter after
Integrator/Gain Stage
4. Set the filter corner frequency.
• High-Pass filter corner frequency (
f
HP
) (See Section 20.7 or 20.8)
• Low-Pass filter corner frequency (
f
LP
) (See Section 20.10)
• Band-Pass filter corner frequencies (f
HP
and f
LP
) (See Section 20.11)
• If you have NO filters, go to step 5.
5. Reassemble the monitor and install it into the rack.
6. Test the filter settings by performing the tests described in Section 20.12.
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