# Clocking.HBus.ClockSourceNetwork

Specifies the number of the trunk that the board uses as its external network timing reference for its internal clock.

For information about setting up CT bus clocking, and rules and restrictions for configuring CT bus clocking, refer to Configuring board clocking.

#### Syntax

Clocking.HBus.ClockSourceNetwork = networknum

#### Access

Read/Write

#### Type

Integer

#### Default

0

#### Allowed values

0

#### Example

Clocking.HBus.ClockSourceNetwork = 0

#### Details

Since CX 2000 boards do not have digital trunks, this keyword is always set to 0.

#### See also

Clocking.HBus.ClockSource