F110 - j1 input (tiet), F110 – j1 input (tiet), Keypad – Symmetricom XLi IEEE 1588 User Manual
Page 107: Where: for example, enter the following string, The xli responds (example), F108<cr, F108 oscillator config tcvcxo<cr><lf
XLi IEEE 1588 Clock
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997-01510-03, Rev. C, 12/12/2006
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where:
For example, enter the following string:
F108<CR>
The XLi responds (example):
F108 OSCILLATOR CONFIG TCVCXO<CR><LF>
F110 – J1 Input (TIET)
Note:
The Time Interval - Event Time (TIET) option is included as a standard feature on the XLi IEEE
1588 clock.
Note:
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,
“F74 – Clock Source Control” on page 77
, 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.
F119 – GPS Receiver Configuration
) to Standby.
Note:
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
“E: Time Code Formats” on page 189
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