Symmetricom XLi IEEE 1588 User Manual

2

5

1

where:

For example, enter the following string:

F108<CR>

The XLi responds (example):

F108 OSCILLATOR CONFIG TCVCXO<CR><LF>

The Time Interval - Event Time (TIET) option is included as a standard feature on the XLi IEEE 

1588 clock. 

Using time code as a reference source is not supported for the XLi IEEE 1588 Clock. 

F110 can configure the J1 input port on the Main CPU card as a time code reference source for the 
system clock, or it can configure J1 as the input for TIET operation.

Keypad

•

J1 Configuration: (IRIG-A, IRIG-B, NASA 36, TIET) Set to match the type of time code input.

•

J1 Time Reference (Available when J1 Configuration is IRIG-A, IRIG-B, NASA 36, not for TIET): 

(Primary, Secondary, Standby) Identify the time code input as a primary or secondary reference 
source. The function, 

, uses this designation to for 

reference source switching. Standby disables and removes J1 Input as a valid reference source. 
Selecting Primary or Secondary automatically bumps another reference source with the same 
setting (e.g. 

) to Standby.

Configuring F110 for TIET forces J1 Time Reference to Standby. When reconfiguring the J1 as a 

time code reference source input, be sure to set J1 Time Reference to Secondary or Primary.

•

Configure Code: (AM, DC) Set to the time code input signal type: AM for amplitude modulated, 

or DC level shift. See the time code definitions in 

 for more 

information.

•

Input Impedance: (For DC: 100 k

Ω or 50Ω. For AM: 100 kΩ only.) For DC code, set the 

appropriate impedance level for the length of the input cable. Short runs (<200 ft.) get 100 k

Ω, 

and long runs (>200) get 50

Ω. 

F

=  ASCII character F

108

= Function 

number

<S>

=  ASCII space character one or more

<CR>

=  Carriage Return, equivalent to pressing the Enter key on a keyboard

<OSC>

=  Oscillator type: TCVCXO, OCXO, HIGH (High Stability OCXO), or RUBIDIUM