GAI-Tronics 69255-001 Page/Party Interface PCBA - Manual (Page 7)

Pub. 42004-608L2B
69255-001 Page/Party
®
Interface PCBA Page: 7 of 10
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10. Set the page line balance adjustment as described below:
Page Balance
The Page Balance is used to set the line loading of the page zones page line. After all stations are
connected to the card, the Page Balance is set. Use a station connected directly to the PPI. Squeeze
the pressbar on the handset and blow steadily into the mouth piece. Listen to the sidetone in the
receiver. Adjust the Page Balance until a minimal side tone is obtained in the receiver. The Page
Balance does not require readjustment unless 10 or more stations are added to the zone.
N OTE : If a handset station is not available for use as indicated above, perform the following steps:
• Connect a true impedance meter to the page line of the appropriate PPI.
• Adjust the line balance potentiometer to a reading as close to 33 ohms as possible
11. Set the monitor level adjustment, if used:
Monitor Level
The Monitor Level can be adjusted during system start-up. This is required only if the Monitor
Receive has been selected during the jumper configuration. Have an individual go to the nearest
Page/Party
® Station and talk on the Page Line. Adjust the Page Monitor until the desired level is
achieved.
12. Verify that the PPI properly routes audio and communicates with the external devices as indicated in
the system manual
Operation
The operation of the PPI is controlled by the MCU. See the MCU configuration details in the system
manual for all PPI operational information.