Maintenance
1710J-Series Waveform Monitors
8–5
Table 8–3: Remote Connector Pin Assignments and Functions
Pin
Name
Function/Description
1
RGB Staircase
The RGB Staircase input signal controls the internal
sweep ramp to offset the Horizontal in time with the
RGB PARADE signal.
2
RGB Enable
Low = RGB Enable. Level sensitive, allows the
instrument to process the RGB staircase input.
9
Ground
Instrument ground for Remote Control
A TTL low level (ground) on pin 2 of the REMOTE connector enables the
shortened RGB/YRGB sweep. A 10 V square wave input to pin 1 provides
approximately nine divisions of sweep. This sweep can be either one line or one
field depending on front–panel switch setting. The displayed signal is the
front–panel selected CH A or CH B input.
When the 1710J–Series Waveform Monitor is substituted for a Tektronix 528 or
528A Waveform Monitor, in some applications the +28 V enable signal used by
the 528 must be converted to ground closure (0 VDC). This conversion requires
only a few common parts, as shown in Figure 8–3.
+28V
Enabling
voltage
47K
0.25W
1N4152
30V
150mA
3K
0.25W
2N3904
To 1/10J–Series
REMOTE connector
Figure 8–3: Common parts used to convert from +28 Vdc enable to ground closure
RGB Offset and Compensation.
Television cameras vary in output dc level; R856
is provided to compensate for this variation in dc level. See Figure 8–1.
C953 is the input compensation that matches the Staircase Amplifier input time
constant to the camera output time constant. See Figure 8–1.
Each time the camera input to the 1710J–Series Waveform Monitor is changed,
the RGB offset and input time constant will probably need to be reset. The
following procedure provides a simple means to make these adjustments.
The RGB offset adjustment sets the display in the useable part of the 1710J–Se-
ries Waveform Monitor graticule. The following procedure is easy to perform
and requires no special test equipment.
RGB/YRGB Parade
Display
Setting RGB Offset
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