Tektronix VITS100 Mode Selection Jumpers, Test Jumpers

Maintenance
VITS100 NTSC VITS Inserter Instruction Manual 7–5
All installation procedures that do not require removing the protective cover of
the VITS inserter are discussed in the Getting Started section of this manual. The
VITS100 NTSC VITS Inserter does have some additional flexibility, however,
that is provided with the internal plug jumpers. Instructions for setting the
jumpers appear in this section because the jumpers can be accessed only by
removing the instrument cover, which could expose unqualified personnel to
potentially hazardous voltages.
WARNING. Operating the VITS 100 NTSC VITS Inserter with the cover removed
can expose personnel to hazardous electrical potentials. Do not operate this
instrument with the cover removed.
Table 7–1: Mode Selection Jumpers
Function Jumper
Number Description Factory Setting
Sound-in-Sync Mode J9 Pins 1–2: No sound-in-sync on
PROGRAM IN.
Pins 2–3: Sound-in-sync on
PROGRAM IN (blocks sound-in-
sync pulses from the Genlock
circuit).
1–2
(Not imple-
mented)
Line Select Mode J22 Pins 1–2: No lines available for
VITS.
Pins 2–3: Lines 17 through 20
available for VITS.
2–3
Bypass Lockout J28 Pins 1–2: Front-panel BYPASS
button enabled.
ins 2–3: Front-panel BYPASS
button disabled.
1–2
In addition to the mode selection jumpers, the VITS inserter contains fourteen
test jumpers for use in the adjustment procedure and for troubleshooting
purposes. These jumpers can be located in Figure 7–1; test jumper functions are
detailed in Table 7–2. Pin 1 is indicated by the ▼ symbol printed on the circuit
board.
Mode Selection Jumpers
Test Jumpers