Tektronix DC 502 User Manual

Section 1 — DC 502
SECTION 1
OPERATING
INSTRUCTIONS
INTRODUCTION
Description
The DC 502 550 MHz Frequency Counter measures
frequencies from 10 Hz to 550 MHz or totalizes events to
10 7 at a maximum rate of 550 MHz. The DC 502 operates
in a TEKTRONIX TM 500 Power Module only.
Frequency measurements are accomplished using one of
two BNC inputs on the front panel. The DIRECT INPUT
has a frequency range of 10 Hz to 110 MHz with a 300 mV
peak-to-peak sensitivity, selectable attenuators, and an
adjustable trigger level range. The ÷10 PRE-SCALE INPUT
has a frequency range of 50 MHz to 550 MHz with a
500 mV peak-to-peak sensitivity and a 50  input
impedance. The same four measurement interval times are
selectable for each input.
Front panel controls reset the Counter and provide
Start/Stop commands for the manual totalizing mode of
each input.
Measurement display is accomplished with seven-segment
LED's in a 7-digit readout. The decimal point is
automatically positioned by the MEASUREMENT
INTERVAL selected, and leading zeros (to the left of the
most significant digit or the decimal point) are blanked.
LED's indicate when the GATE is open, when the kHz or
MHz units are displayed, and when OVERFLOW occurs.
Installation
The DC 502 is calibrated and ready to use as received.
Referring to Fig. 1-1, install the DC 502 into the Power
Module and turn on the power.
Fig. 1-1. Plug-in module installation/removal.
1-1
@1
REV. MAY 1974

Tektronix DC 502 Specifications

General

Brand	Tektronix
Model	DC 502
Category	Cash Counter
Language	English