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5.0
System Adjustments
5.1
SC720/SC820 System Adjustments
This chapter discusses the procedures to make adjustments, verify operating values, or change the default
settings to the following items for the SAFECOM SC720/SC820 Data Repeater:
•
Squelch Threshold
•
Modulation Deviation
•
Hang Time
•
Output Power
•
Decode Characters (Attack Time)
•
Address Code
If any changes are made to items 1 thin 4 above, Senses International recommends that all four items (1 thin 4)
be checked to ensure proper operation of the SC720/SC820 Data Repeater.
5.2
Removing/reinstalling the SC720/SC820 and DK1000 Access Covers
ELECTRICAL HAZARD!! High Voltage (HV) and High Energy (HE) potential exists on un-insulated
components with the enclosure of the SC720/SC820. Service is restricted to authorized factory, or
field site personnel.
This equipment should ONLY be serviced by experienced technicians familiar with similar types of
commercial grade communications equipment.
The circuit fuse for the SC720/SC820 is located inside the unit. Disconnect system power prior to
servicing.
Electrical current from power and communications cables is hazardous. Connect and disconnect
cables as specified by the manufacturers recommendations when installing, moving, or opening the
covers of system components or attached devices.
All of the SAFECOM products, and attached devices, are equipped with a 3-wire power cord and
plug for the user's safety. Use this power cord in conjunction with a properly grounded electrical
outlet to avoid electrical shock.
Do NOT transmit until all RF connectors are verified, secure, and any open connectors are properly
terminated.
5.2.1
Removing the access covers
Utilize the following procedures to REMOVE the SC720/SC820 and DK1000 access covers:
1.
System Power OFF. Unplug the AC power cord from the electrical outlet or disconnect the DC power
source.
2.
Remove the 6 retaining screws holding the upper portion of the SC720/SC820 unit cover.
3.
Remove the upper portion of the SC720/SC820 unit cover.
4.
Remove the 13 retaining screws holding the access cover, gold in color, to the DK1000 controller board.
5.
Remove the DK1000 access cover.
5.2.2
Reinstalling the access covers
Utilize the following procedures to INSTALL the SC720/SC820 and DK1000 access covers:
1.
System Power OFF. Unplug the AC power cord from the electrical outlet or disconnect the DC power
source.
2.
Place the DK1000 access cover in position for installing the retaining screws.
3.
Install the 13 retaining screws for the DK1000 controller board access cover.
4.
Place the upper portion of the SC720/SC820 unit cover in position for installing the retaining screws.
5.
Install the 6 retaining screws for the SC720/SC820 unit cover.
90007-201C
SC720/SC820 Operation and Installation Guide
Page 17
SC720/SC820
System Adjustments
© 2004 Bosch Security Systems
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