ZETRON 640 DAPT XTRA, Руководство по установке и ремонту

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Adjustment Procedures
96 025-9416
q 3. Unscrew the card guide from the back of the chassis for the dual trunk on which the
dial click decoder is to be adjusted. Pull the dual trunk from its connectors.
q
4. Plug the extender card into the connectors on the paging terminal peripheral board
where the dual trunk was installed. Then plug the dual trunk into the extender card.
This enables easy access to the dial click pots for adjustment.
Note: If an extender card is not available and trunk A or B needs adjustment, remove the
other dual trunk card (C/D) to perform the procedure.
q 5. Power-up the paging terminal and let it complete its boot sequence (all lights have
extinguished, except the READY LED is on solid).
q
6. Connect the two telephones together with the Y connector into the same trunk of the
Model 640.
q 7. Call into the paging terminal with the touch-tone phone and access a tone+voice
pager previously programmed with lots of voice time (for example, 60 seconds).
q 8. During the voice recording time, pick up the rotary telephone and hang up the touch-
tone telephone. Be sure to hang up, otherwise unwanted noise and phone line loading
may change the sounds of the “clicks.”
q 9. Start dialing digits while adjusting the appropriate pot on the dial click card. R6 is
located at the top of the card and defines trunk A/C. R30 is located at the bottom of
the card and defines trunk B/D.
Begin the adjustment from the fully counter-clockwise position and rotate the pot
clockwise until the light on the card blinks consistently with each dial click (two
blinks for each click).
Optimum adjustments vary, and software settings should be re-checked. (Typical pot
setting
≈
midrange.)
q
10. Once the card is adjusted, power-down the Model 640.
q 11. If an extender card was used, remove it and reinstall the trunk card. If a second trunk
card was removed for the adjustment procedure, reinstall it.
q
12. Replace the top cover of the paging terminal and secure it with screws.
Note: If the dial click card is newly installed, some modifications to the Model 640 database
are required. Refer to the Model 640 Operating and Programming Manual (Part No.
025-9417) for details on trunk configuration.