ADEMCO 7845CZ, Installation And Setup Manual

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Section 4: Installation and Setup
4–3
Using an Unregistered 7845CZ as an Installation Tool
An unregistered 7845CZ will display signal strength once
the initial power-on sequence is complete.
Use the guide on the right when selecting an installation
site.
Select an installation site where the RSSI is between 3 –
5 bars.
GRN
GRN GRN YEL YEL
INCREASING SIGNAL STRENGTH
0.0 no signal
0.5
1.0
2.5
3.0 min
3.5
4.0
4.5
5.0 max signal
1.5
2.0 min
installation level
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Initial Power-Up Sequence
Before connecting power, check that the following have been completed:
•
Terminal block TB1 V+ and GND terminals are connected to the control panel’s auxiliary
power output: 12VDC nominal.
•
Antenna installed.
Apply power. Initially, all 7845CZ programming options are set to the factory default
settings.
Upon applying power, the 7845CZ enters a power-on reset state, indicated by the RSSI,
mode, and status display LEDs lighting in a “chaser” sequence. After this power-up
sequence, the radio status LEDs display: green lit, yellow blinking, and red lit.
This indicates the 7845CZ is functioning but not yet initialized. The 7845CZ then begins its
initialization sequence. During this process, the 7845CZ is verifying its Mobile Identification
Number (MIN) and checking for MicroBurst service on both the “A” and “B” side carriers.
This initialization is displayed on the RSSI bar graph as follows (refer to Table 4): The yellow
LED remains unlit and the green LED at the extreme right of the display begins to blink.
This green LED then lights (after a short period of time), and the next green LED to the left
begins to blink. When this LED lights, the next green LED begins to blink, and so on, until
all 4 green LEDs are lit. This countdown event may take up to 10 minutes to complete.
Once this sequence has been completed, the RSSI display begins to function as a signal
strength indicator as described in the “Selecting a Radio Installation Site” paragraph in this
section. The radio is now in normal, unprogrammed and unregistered operation. If radio
setup and self-test fails, LED 5 blinks continuously and no further progress is made. If
MicroBurst coverage is not found on either the A or the B side, the 7845CZ repeats Table 3,
steps 2 and 3. These steps are repeated until MicroBurst is found.