User's Manual

AES 7880-B

UHF

DATA TRANSCEIVER

USER MANUAL

October 1, 2004

Notice:

The exterior of any product containing this device must contain the following

label:

“Contains FCC ID : L9N-7880-B”

Warning:

This device must be professionally installed with appropriate power supply

and antenna in order to ensure proper operation. The antenna gain must not

exceed 10.5 dBi.

Warning:

This device may not be modified by the user. Any modifications not

expressly approved by AES Corporation could void the user’s authority to operate

the equipment.

Warning:

For FCC RF exposure compliance purpose, this device may not be

incorporated into any product which operates within 20 cm of a person under

normal operation.

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AES 7880-B UHF DATA TRANSCEIVER USER MANUAL October 1, 2004 Notice: The exterior of any product containing this device must contain the following label: “Contains FCC ID : L9N-7880-B” Warning: This device must be professionally installed with appropriate power supply and antenna in order to ensure proper operation. The antenna gain must not exceed 10.5 dBi. Warning: This device may not be modified by the user.
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1.0 Description The AES Model 7880-B UHF Data Transceiver permits data to be transmitted in the 450 ~ 470 MHz band of frequencies. The maximum output power is 120 mW. The data rate can be in the range of 2400 ~ 9600 baud. The 7880-B interfaces with an embedded microprocessor using a simple 4-wire serial Programming Port. The operating parameters are set by AES approved software. B2.0 Signals The 7880-B has 20 pins, consisting of 2 rows of 10 pins each.
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20 “ 3.0 Calibration The 7880-B has a single adjustment – the Crystal Oscillator frequency. In order to adjust the Crystal Oscillator frequency, a suitable frequency counter must be attached to the antenna port. With the 7880-B set to transmit, using Manchester coding, the Crystal Oscillator may be adjusted until the average frequency measured by the frequency counter corresponds to the desired center frequency. The average frequency should be set to within 300 Hz of the desired value.