# Clocking.HBus.NetRefSource

Specifies a source to drive the NETREF timing signal on the CT bus.

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.NetRefSource = source

#### Access

Read/Write

#### Type

String

#### Default

STANDALONE

#### Allowed values

OSC | STANDALONE | NETWORK

#### Example

Clocking.HBus.NetRefSource = NETWORK

#### Details

Valid entries for the keyword include:

Value | Description
--- | ---
OSC | The oscillator uses the board's local clock (for diagnostics only).
STANDALONE | The NETREF clock is not driven.
NETWORK | The timing signal is derived from a device source (digital trunk).

#### See also

Clocking.HBus.NetRefSpeed