AD8326 Analog Devices, AD8326 Datasheet - Page 14

• Manufacturer Part Number: AD8326
• Description: High Output Power Programmable CATV Line Driver
• Manufacturer: Analog Devices

AD8326
Running AD8326 Software
To load the control software, go to START, PROGRAMS,
CABDRIVE_26, or select the AD8326.exe from the installed
directory. Once loaded, select the proper parallel port to com-
municate with the AD8326 (Figure 9).
Controlling Gain/Attenuation of the AD8326
The slide bar controls the gain/attenuation of the AD8326,
which is displayed in dB and in V/V. The gain scales 0.75 dB
per LSB with valid codes from 0 to 71. The gain code from the
position of the slide bar is displayed in decimal, binary, and
hexadecimal (Figure 10).
Transmit Enable and Sleep Mode
The Transmit Enable and Transmit Disable buttons select the
mode of operation of the AD8326 by asserting logic levels on
the asynchronous TXEN pin. The Transmit Disable button
applies Logic 0 to the TXEN pin, disabling forward transmis-
sion while maintaining a 75
Enable button applies Logic 1 to the TXEN pin, enabling the
AD8326 for forward transmission. Checking the “Enable SLEEP
Mode” checkbox applies logic “0” to the asynchronous SLEEP
pin, setting the AD8326 for SLEEP mode.
back termination. The Transmit
Memory Functions
The MEMORY section of the software provides a way to alter-
nate between two gain settings. The “X->M1” button stores
the current value of the gain slide bar into memory while the
“RM1” button recalls the stored value, returning the gain slide
bar to the stored level. The same applies to the “X->M2” and
“RM2” buttons.