Tektronix 070-8462-03, Instruction Manual

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Installation
1–8
1735 HD High Definition Waveform Monitor
Table 1–2: REMOTE connector pin assignments and functions (Cont.)
Pin Function / Description Name
12 /CH 1 Pins 12, 13, and 14 work alike. They are used with CHA and/or CHB.
A High-to-Low transition for pin 12, 13, or 14 turns on the corresponding input channel. In
one line/field operation, the other two input channels are unaffected. In two line/field
operation, the other two channels are turned off, and all three channels are always on in
three line/field operation.
13 /CH 2 Refer to pin 12 description.
14 /CH 3 Refer to pin 12 description.
15 A, /B Use with CH1, CH2, and/or CH3
High = CHA
Low = CHB
High-to-Low transition turns on CHA and turns off CHB. Low-to-High transition turns on
CHB and turns off CHA.
Front-panel button turns A or B off.
When going from either A or B to BOTH, REF is forced to External. When going from
BOTH to either A or B, REF is restored to pre-BOTH status.
All front-panel controls operate in their usual manner during remote operation.
Functions selected through remote ground closures may be changed with the
front-panel controls. Once this occurs, the remote selection can be reinstated
either with the front-panel control, or by removing and reattaching the ground
closure.
Front-panel LED indicators light to show the current selection in all cases.
Table 1–2 describes the remote functions that may be selected. A logic NOT, or
low, means that the specified REMOTE pin must be low (0 V to +0.8 V) to
achieve that function. A high means that the pin is left open (with no signal), or
accepts a 2 V to 5 V signal, to achieve the desired function.
Remote Sync input (pin 10) works with TTL level squarewaves, and requires an
input signal of approximately 1.3 kHz to synchronize the 1735 HD. Polarity is
internal jumper selected, as shown in Table 1–1.
Both (pin 11) turns both Channel A and Channel B on when grounded. As with
the front-panel, various input channel combinations may be achieved. These
selections also work in conjunction with the ONE, TWO, THREE, and the LINE
and FIELD functions. Refer to Operating Basics, especially Table 2–1, for more
information about Line and Field selections.
At the time of this writing, the rear-panel AUXILIARY connector is not used.
Remote Operation
AUXILIARY Connector