Tektronix 3B5, Инструкция по эксплуатации

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Operating Instructions— Type 3B5
PROGRAM
— 12.2 volts
Program ground
X1 multiplier logic
External mode command
X2 multiplier logic
Chassis ground
External horizontal input
A enable logic
X5 multiplier logic
B enable logic
1 s, 0.1 s, decade logic
Single sweep reset
External holdoff lockout
10 ns decade logic
10 ms, 1 ms decade logic
— trigger slope logic
0.1 ms, 10
μ
s decade logic
External DC trigger logic
1
μ
s, 0.1
μ
s decade logic
External AC trigger slope
Remote seek
Internal AC trigger logic
External unblanking
External horizontal position
X 1 magnification logic
External trigger level
X10 magnification logic
Sweep output
External delay
X100 magnification logic
4-125 volts
—100 volts
(J30 1)
Fig. 2-8. Front-panel PROGRAM connector.
The following functions must be programmed for each
individual program.
1. Trigger function (absence of program provides Int Auto
operation).
2. Trigger slope (absence of program provides + slope
operation).
3. Sweep rate (sweep multiplier, sweep decade and
decade enable must be programmed; see Table 2-3).
4. Sweep magnification.
5. Trigger level (except for auto operation).
6. Horizontal position (front-panel POSITION control may
be used if not programmed).
7'. Delay.
Connect Program to Following
Terminals of J30
TABLE 2-3
Sweep Rate Programming
Sweep Rate Multiplier Decade Enable
5 second 5
6 23
2 second
3 6 23
1 second 2 6 23
0.5 second
5 6 24
0.2 second
3 6 24
0.1 second 2
6 24
50 millisecond 5
8 23
20 millisecond 3
8 23
10 millisecond 2
8 23
5 millisecond 5
8 24
2 millisecond 3
8 24
1 millisecond
2 8
24
0.5 millisecond
5 9
23
0.2 millisecond 3
9 23
0.1 millisecond
2 9
23
50 microsecond 5 9
24
20 microsecond 3
9 24
10 microsecond 2
9 24
5 microsecond 5 11
23
2 microsecond 3 11
23
1 microsecond 2
11 23
0.5 microsecond
5 11
24
0.2 microsecond
3 11
24
0.1 microsecond 2 11
24
50 nanosecond 5
26 24
20 nanosecond
3 26
24
10 nanosecond
2
26 24
8. External mode command (may be momentarily actu ­
ated by holding front-panel EXT button depressed).
If more than one external program is connected to the
Type 3B5, diode isolation, negative bias levels (—12 volts)
and program switching must be provided to isolate the
inactive programs from the active program. Components
used must be able to handle the currents listed in Table 2-2.
BASIC APPLICATIONS
General
The following information describes the procedure and
technique for making basic measurements with a Type 3B5
Automatic/Programmable Time Base unit and associated
amplifier unit and indicator oscilloscope. These applications
are not described in detail since each application must be
adapted to the requirements of the individual measurements.
Familiarity with the Type 3B5 and associated units will permit
these basic applications to be applied to a variety of uses.
All of these applications are given for Manual Mode opera ­
tion; however, they can be adapted for either Seek Mode
or External Mode operation.
2-14