Tektronix 7D14, Instruction Manual

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7D14
SECTION 1
SPECIFICA TION
Change information, if any, affecting this section will be found at the rear of this manual.
Introduction
The 7D14 Digital Counter plug-in unit is designed for use
with Tektronix 7000-series Oscilloscopes equipped with
readout system. The 7D14 uses the readout system to
display an eight-digit readout on the CRT of the associated
oscilloscope. The 7D14 will measure frequency from 0 to
525 megahertz, frequency ratio from 0 to 10s : 1 and
totalize (count number of events) from 0 to 108. The 7D14
features counting capability to 525 megahertz without
prescaling, input impedance of 50 ohms or 1 megohm,
blanking of all zeros to the left of the most significant digit.
trigger pickoff from vertical amplifier unit (which allows
simultaneous signal viewing and counting, and a trigger
indicator analog CRT display to view the “shaped" input
signal.
The following electrical characteristics are valid for
instruments calibrated at an ambient temperature between
+20°C and +30°C after a 20 minute warmup period.
TABLE 1-1
ELECTRICAL
Characteristic Performance Requirement
Supplemental Information
Frequency Range
DC Coupled
CHANNEL A (Count Channel)
INPUT SENS
P-P VOLTS
Switch Setting
As indicated by INPUT SENS Switch
within 10%. VSWR in 50-ohm position
<1.5:1
50 Ω 1 MΩ
DC to 525 mega­
hertz
DC to 525 mega­
hertz
AC Coupled 200 kilohertz to
525 megahertz
5 hertz to 525
megahertz
Sensitivity 100 millivolts
peak-to-peak
100 millivolts
peak-to-peak
Input
Resistance
Capacitance Not applicable
20 picofarads within 20% when INPUT
SENS is set to 1 MΩ input impedance.
®i
1-1