Tektronix SPG8000 Technical Reference page 71

SPG8000 Technical Reference
SOURCE. Use the left (◄) or right (►) arrow button to set the reference source
for the module timing. Select one of the following references, and then press the
ENTER button to confirm the selection.
Internal: Uses the internal clock frequency setting as the timing reference.
GPS Signal: This menu item appears only when Option GPS is installed.
Uses the GPS signal input as the timing reference.
NTSC Burst: Uses the NTSC black burst signal applied to the REF input
connector as the timing reference.
NTSC Burst with 10 Field ID: Uses the NTSC black burst with 10 Field ID
signal applied to the REF input connector as the timing reference.
PAL Burst: Uses the PAL black burst signal applied to the REF input
connector as the timing reference.
HD Tri-Level Sync: Uses the HDTV trilevel signal applied to the REF input
connector as the timing reference.
CW: Uses the 1, 3.58, 4.43, 5, or 10 MHz continuous wave signal applied to
the REF input connector as the timing reference.
GENLOCK TIMING. This menu item appears only when GPS Signal is not the
selected reference source. This menu item does not appear when the reference
source is set to Internal.
Adjusts the timing offset of the input signal relative to the internal reference
signal. Press the ENTER button to access the GENLOCK TIMING submenu.
(See page 63, GENLOCK TIMING submenu.)
LOCK LOSS ACTION. This menu item does not appear when the reference source
is set to Internal. Use the left (◄) or right (►) arrow button to select the action
that the module will make when a loss of lock condition is detected. This can
happen for example, if the GPS antenna signal is lost. Select one of the following
actions, and then press the ENTER button to confirm the selection.
Stay at Current Frequency: Sets the module timing to keep operating at the
current frequency until the reference signal is recovered.
Use Internal Frequency: Sets the module timing to switch to the internal
frequency setting until the reference signal is recovered.
REF button menu
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