Tektronix 2715 1-18 2715 Spectrum Analyzer Service Manual, Table1 -5: Input/Output Signal Characteristics (Cont.)

Specifications
1-18 2715 Spectrum Analyzer Service Manual
Table1 -5: Input/Output Signal Characteristics (Cont.)
Characteristic Suppl emental InformationPerformanceRequirement
Ext Trig (J102) BNC connector, 10 kΩ,DC coupled for
external trigger signals
Voltage Range
Minimum Typically at least 100 mVpeak,15Hzto
1MHz
Maximum 50 V (DC+ peak AC)
PulseWidth 0.1 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 +2.0V 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 nominal +1.3 V to --1.3 V
negative-going ramp, proportional to the
horizontal sweep (output impedance
≤50 Ω).
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 kΩ.
Pin 6: CLK0 Output Clock output t o Option 05 (External
Tracking Generator). CMOS logic levels
typically +3.5 V high, +1.5 V low.
Pin 7: Data I Input Data input from Option 05 (External
Tracking Generator). Typically+5 V hi gh,
+0.1 V low.
Pin 8: Data O Output Data output to Option 05 (External
Tracking Generator). CMOS logic levels,
typically +3.5 V high, +1.5 V low.
Pin 9: ~EXTGLATCH Logic output to Option 05 (External
Tracking Generator). CMOS logic levels,
typically +3.5 V high, +1.5 V low.
Pin 10: 26.38 MHz Input Input from Option 05 (External Tracking
Generator); typically a 0.5 Vp-p sine wave
centered at +3.7 VDC.