# Check modulations¶

## How check modulations works¶

Depending on your configuration you may want to change the check_command during the night. For example, you want to send more packets for a ping during the night because there is less network activity so that you can get more accurate data.

## How to define a check_modulation¶

define checkmodulation{
checkmodulation_name     ping_night
check_command            check_ping_night
check_period             night
}

define host{
check_command                  check_ping
check_period                   24x7
host_name                      localhost
use                            generic-host
checkmodulations               ping_night
}


Here check_ping will be modulated into check_ping_night for the host localhost.

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