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The Tektronix 160 series is a modular oscilloscope made from the mid 1950's  
The '''Tektronix 160 series''' is a modular oscilloscope made from the mid 1950's  
(schematics drawn in [[introduced in 1953|1953]]) to the late 1960's (in 1969 catalog).   
(schematics drawn in [[introduced in 1953|1953]]) to the late 1960's (in 1969 catalog).   
A 160 series system typically includes a Type 160 power supply,  
A 160 series system typically includes a Type 160 power supply,  
a [[360|Type 360 indicator unit]],  
a [[360|Type 360 indicator unit]], and one or more of the  
and one or more of the [[161]], [[162]], and [[163]] trigger and sweep modules.   
[[161]], [[162]], and [[163]] trigger and sweep modules.   
Each module is the size of a small shoe box.   
 
Power connections are made behind the modules using [[W160|Type W160]] cables that have  
Each module is the size of a small shoe box.  Power connections are made behind  
[[connectors|octal connectors]].   
the modules using [[W160|Type W160]] cables that have [[connectors|octal connectors]].   
The power cables can be connected in a star topology (Type 160 in the center)  
The power cables can be connected in a star topology (Type 160 in the center)  
or can be daisy-chained using the loop-through connection on the back of each module.  
or can be daisy-chained using the loop-through connection on the back of each module.  
Signal connections are made on the front, typically with banana plugs.   
Signal connections are made on the front, typically with banana plugs.   
The 160, 161, 162, and 163 use the ceramic strip and silver solder construction style  
 
that is prevalent in other Tektronix equipment of the era, such as the 500-series scopes like the [[545]].
The 160, 161, 162, and 163 use the ceramic strip and silver solder construction style that
is prevalent in other Tektronix equipment of the era, such as the 500-series scopes like the [[545]].
The Type 360 indicator unit contains the CRT HV power supply and the vertical amplifier  
The Type 360 indicator unit contains the CRT HV power supply and the vertical amplifier  
and is constructed using a single-sided printed circuit board.
and is constructed using a single-sided printed circuit board.


In a typical setup, the input signal is fed through a splitter  
In a typical setup, the input signal is fed through a splitter to the Y-input of the  
to the Y-input of the 360 and the trigger input of the 161.   
360 and the trigger input of the 161.  The 161 generates a trigger pulse that controls a 162,  
The 161 generates a trigger pulse that controls a 162,  
which generates the horizontal ramp for the sweep.  This ramp signal is sent to the 360 horizontal input.   
which generates the horizontal ramp for the sweep.   
 
This ramp signal is sent to the 360 horizontal input.   
The signals on the front panel of the 160-series modules are all single-ended.   
The signals on the front panel of the 160-series modules are all single-ended.   
==Internals==
The 360 has a phase splitter to generate the differential drive for the horizontal deflection plates.
The 360 has a phase splitter to generate the differential drive for the horizontal deflection plates.
The 360 uses a standard [[3WP|3WP series 3-inch CRT]].   
The 360 uses a standard [[3WP|3WP series 3-inch CRT]].   
The cathode voltage is -1850 volts.  No post-deflection acceleration is used.
The cathode voltage is -1850 V.  No post-deflection acceleration is used.


The 160 power supply was produced with serial numbers 101-619.   
The 160 power supply was produced with serial numbers 101-619.   
For serial numbers 620 and up, it is slightly different and is called the 160A.   
For serial numbers 620 and up, it is slightly different and is called the 160A.   
The 160 and 160A both use a [[5V4]] rectifier tube for the negative voltage  
The 160 and 160A both use a [[5V4]] rectifier tube for the negative voltage  
and two 5V4 tubes in parallel for the positive voltage.   
and two 5V4 tubes in parallel for the positive voltage.   
Both use [[5651]] 87-volt reference tubes.   
Both use [[5651]] 87-volt reference tubes.   
The 160 and 160A differ in their output regulator circuits.   
The 160 and 160A differ in their output regulator circuits.   
The 160 uses a [[6AS7]] dual-triode tube, one half to regulate the +225V output  
The 160 uses a [[6AS7]] dual-triode tube, one half to regulate the +225V output  
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<gallery>
<gallery>
Image:Tek 160 dn1.jpg|photo courtesy of Dave Nicol
File:Tek 160 dn1.jpg|photo courtesy of Dave Nicol
Image:Tek 160 dn2.jpg|photo courtesy of Dave Nicol
File:Tek 160 dn2.jpg|photo courtesy of Dave Nicol
Image:Tek 160 schem.png|160 schematic
File:Tek 160 schem.png|160 schematic
Image:Tek 160a schem.png|160A schematic
File:Tek 160a schem.png|160A schematic
</gallery>
</gallery>


[[Category:Introduced in 1953]]
[[Category:Introduced in 1955]]
[[Category:160 system]]
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