OPTION DESCRIPTIONS
1.3.5 MASK LEVEL POTENTIOMETER R43
Used to adjust the shading of the mask, if enabled, in the video output. Clockwise operation
increases mask “whiteness.”
Note:
In the following discussion of the various DIP switches, “closed” refers to
the ON position, as marked on the DIP switch assembly.
1.3.6 S1-1, S1-2 SUB-SECONDS DATA CONTROL
Used to control the amount of sub-seconds data being inserted into the video output. When
generator time is being inserted (refer to the DATA SOURCE SELECTION paragraph on page
five) all three digits of sub-seconds (tenth-seconds, hundredth-seconds, milliseconds) are available.
When inserting translator time, sub-seconds data availability is a function of the carrier frequency of
the time code being translated by the TM7000. For example, when translating IRIG E100 or NASA
28, the unit milliseconds digit (if enabled) will be held to “0.” Refer to Table One below for sub-
seconds data selection.
Table One
Sub-Seconds Data
Fractional
Seconds
S1-1 S1-2
tS, hS, mS
CLOSED
CLOSED
tS, hS
OPEN
CLOSED
tS CLOSED
OPEN
NONE OPEN
OPEN
1.3.7 S1-3 DAYS INSERTION CONTROL
Used to control insertion of days data into the video output. When S1-3 is closed, days data is
deleted from the video output. To enable days data, open S1-3.
1.3.8 S2-1 TIME DATA CONTROL
Used to control the insertion of the time to the video output. When S2-1 is closed, the time is
deleted from the video output. To enable the time data, open S2-1.
1.3.9 S2-2 MASK CONTROL
Used to control the mask of the video to the video output. When S2-2 is closed, the mask is
removed from the video output. To enable the mask, open S2-2.
1.3.10 S2-3, S2-4 CHARACTER SIZE
Used to control the vertical size (in horizontal lines-per-field) of the inserted characters. When the
inserter is used with a 2:1 interlaced video signal such as RS-170 or RS-330, the character height
per video frame will be double the indicated value. Since the character height is a specific number
of horizontal lines, apparent height (percent of picture) will vary between video formats. Refer to
Table Two for size selection.
Symmetricom, Inc.
TM7000 TymMachine TCG/T (Rev D)
A-47
