Tektronix 561A, Инструкция по эксплуатации

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Accessories — Type 561 A
TABLE 6-4
INTERCONNECTING LEADS
Description Part Number
Type W130B Black, 30" flexible out­
put lead with banana plug at one end
and alligator clip at other.
012-014
Type W130R. Some as Type W130B ex­
cept colored red.
012-015
Type PC-6B. Black, 6" flexible cord with
combination plug and jock banana-type
connectors on each end.
012-023
Type PC-6R. Same as Type PC-6B ex­
cept colored red.
012-024
Type PC-18R. Similar to Type PC-6B ex ­
cept 18" long and colored red.
012 031
Type W531B. Black, 6" flexible cord
with plug banana-type connectors on
each end.
012-028
Type W531R. Same as Type W531B ex­
cept colored red.
012-029
SIGNAL AMPLIFIER INPUT CAPACITANCE
STANDARDIZER
Standardization of real time signal amplifier input capaci­
tance is important when exchanging attenuator probes be
tween units. The overall amplifier ottenuator plus probe fre ­
quency response is degraded if all input time constants are
not equal. Standardizer for 1 -megohm, 47-pf input ptug-in
units, 4 X attenuation.
Order port number
011 021
Observe the power ratings stamped on the case of each
unit. Power dissipation in excess of the rating may destroy
the resistance element. Replacement element stock numbers
are included in Table 6-5.
If your application requires pulsing attenuotors or ter­
minations with voltages above their rms ratings, refer to
' Power-Time Relationships", Fig. 3, page 802, 4th Edition
I T and T Reference Data for Radio Engineers. The "Power-
Time Relationships" chart will aid you in using the attenua
tors or terminations within their safe power dissipation limits.
TABLE 6-5
50 <2 GR CONNECTOR ATTENUATORS AND
TERMINATIONS
Description Part Number
10 X T Attenuator, 1 watt, Unit:
Element:
017 044
307-064
5 XT Attenuator, 1 watt. Unit:
Element:
0)7-045
307-065
2 X T Attenuator, 1 wall. Unit
Element:
017-046
307-066
50 fl End-Line Termination, 2 watts. Unit:
Element:
0)7-047
307-077
47-pf Input Capoci'oour Stondardlio
1000-MEGACYCLE ATTENUATORS AND
TERMINATION WITH GR TYPE 874 50-OHM
CONNECTORS
The units listed in Table 6-5 provide high fidelity in-line
attenuators, or end-line termination. Each unit is fitted with
hermaphroditic GR Type 874 connectors for easy connection
to other connectors or adapters of the same type. The
ottenuator vswr is less than 1.1 to 1000 megacycles.
Intended for use with Tektronix Sampling Systems, these
high performance T attenuators can be inserted directly into
a 50-ohm system. Since the Tektronix Sampling Systems have
internal 50-ohm terminations, no in-line termination is re ­
quired with the attenuators.
®
HIGH FREQUENCY BNC CONNECTOR
TERMINATIONS AND ATTENUATORS
Tektronix offers a series of terminating resistors and atten ­
uators, having a BNC Plug on one end ond o BNC Jack on
the other. The attenuators have o «wr of less than 1.1, when
properly terminated, to 100 megacycles. Table 6-6 lists the
BNC group.
Any of the BNC terminations and attenuators moy be
used with a Tektronix 560-series oscilloscope by adding the
proper adapter (listed in Table 6-1). For cxomple, to adapt
a BNC Plug to a UHF Jack, select part number 103-015.
It is often necessary to terminate a coaxial system when
connecting it to the mput of on oscilloscope Proper ter ­
mination with a resistance equal to the coble characteristic
tmpedonce will prevent signal reflections and avoid meas ­
urement errors.
If the signal requires attenuation at the oscilloscope input,
a 10:1 T ottenuator of the correct impedance con be used.
However, a T attenuator olone is not a correct cable ter ­
mination and must be followed by the proper termination
resistor.
6-3
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