Specifications
A–18
2715 User Manual
Table A–5: Input/Output Signal Characteristics (Cont.)
Characteristic
Supplemental Information
Performance Requirement
Ext Trig (J102)
BNC connector, 10 k
W
, DC coupled for
external trigger signals
Voltage Range
Minimum
Typically at least 100 mV
peak
, 15 Hz to
1 MHz
Maximum
50 V (DC + peak AC)
Pulse Width
0.1
m
s minimum
Accessory Connector (J103)
DB-15 female connector
Pin 1: External Video Input
Typically 100 ohm, DC coupled, 0 -
50 kHz, 0 – 1.6 V (200 mV/div) signal
input for vertical deflection of the CRT
beam. The signal is processed through
the video filters and the 1 dB, 5 dB, and
10 dB scale factor circuits on the Log
board. Display storage may be by-
passed.
Pin 2: Sweep Gate
+2.0 V minimum (high)
0.8 V maximum (low)
TTL-compatible signal that goes to a
logic high level while the CRT beam is
sweeping.
Pin 3: Chassis and Signal Ground
Pin 4: Sweep Output
–1.3 V
+1.3 V
Provides a n1.3 V to –1.3 V
negative-going ramp, proportional to the
horizontal sweep (output impedance
≤
50
W
).
Pin 5: Log Video Output
Provides 0 V to +1.6 V of video signal,
inversely proportional to the vertical
display amplitude. 0 V is the top of the
screen. Impedance is 1 k
W.
Pin 6: CLK0 Output
Clock output to Option 05 (External
Tracking Generator). CMOS logic levels
typ3.5 V high, +1.5 V low.
Pin 7: Data I Input
Data input from Option 05 (External
Tracking Generator). Typ5 V high,
+0.1 V low.
Pin 8: Data O Output
Data output to Option 05 (External
Tracking Generator). CMOS logic levels,
typ3.5 V high, +1.5 V low.
Pin 9: ~EXTGLATCH
Logic output to Option 05 (External
Tracking Generator). CMOS logic levels,
typ3.5 V high, +1.5 V low.
Pin 10: 26.38 MHz Input
Input from Option 05 (External Tracking
Generator); typically a 0.5 V
p-p
sine wave
centered at +3.7 VDC.
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