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Tektronix equipment makes use of a wide variety of connectors. 
Tektronix equipment makes use of a wide variety of connectors, most of which follow established standards, but occasionally,
Most of the connectors were standard parts when the instruments were designed.
custom connectors were designed.  This page presents a partial overview of connectors used in Tektronix equipment.
Occasionally custom connectors were designed.  What follows is a partial list of connectors
used in Tektronix equipment.


==BNC==
For details, please see the pages linked from the headings.
BNC is the most common connector for measurement equipment up to 1GHz.
__TOC__
It was patented in 1951 by Hazeltine Research, Inc.
==Coaxial connectors==
It is available in different impedances.  50-ohm is the most common.
Tektronix gear transitioned from [[Connectors#UHF|UHF connectors]] to BNC connectors in
the early to mid-1960's. For some pieces of equipment, a conversion kit was
available. 


* [http://w140.com/us_patent_2540012_bnc_connector.pdf BNC Connector Patent (PDF)]
{| class="wikitable"
|-
!colspan="2" | [[BNC connector]]
!colspan="2" | [[Tekprobe BNC connector]]
|-
| [[File:Bnc female.jpg|150px|thumb|BNC Female]]
| [[File:Bnc male.jpg|150px|thumb|BNC Male]]
| [[File:Tekprobe_connector.jpg|150px|thumb|Tekprobe connector (socket)]]
| [[File:Tekprobe_2_interface.png|150px|thumb|Tekprobe-BNC interface]]
|-
!colspan="2" | [[SMA connector]]
!colspan="2" | [[SMB connector]]
|-
| [[File:Sma male.jpg|150px|thumb|SMA Male]]
| [[File:Sma female.jpg|150px|thumb|SMA Female]]
| [[File:Smb on 4s1 sampler.jpg|150px|thumb|SMB Connector as Strobe Input to [[4S1]] Sampler]]
| [[File:Smb in tek 284.JPG|150px|thumb|SMB Connector as Tripper Pulse Input to [[284]] Tunnel Diode]]
|-
!colspan="2" | [[UHF connector]]
!colspan="2" | [[N connector]]
|-
| [[File:UHF_socket.jpg|150px|thumb|UHF socket (on a [[G|Type G]] plug-in)]]
| [[File:013_045_5.jpg|150px|thumb|The 013-045 has one male two female UHF connectors]]
| [[File:N connector.jpg|150px|thumb|]]
| [[File:N socket.jpg|150px|thumb|]]
|-
!colspan="2" | [[GR-874 connector]]
!colspan="2" | [[BSM connector]]
|-
| [[File:Gr874 connector.jpg|150px|thumb|GR-874 cable connector]]
| [[File:S1-crop.jpg|150px|150px|thumb|GR-874 connector on [[S-1]] sampling head]]
| [[File:7t11 bsm.jpg|150px|thumb|BSM female on front lower right of 7T11]]
| [[File:Bsm panel jack.jpg|150px|thumb|BSM panel jack]]
|-
!colspan="2" | [[Gremar connector]]
!colspan="2" | [[Peltola connector]]
|-
|colspan="2" align="center" | [[File:5t1a_coax_interconnect.jpg|150px|thumb|center]]
| [[File:Peltola-connector-socket.jpg |150px|thumb|Socket]]
| [[File:Peltola-connector-tip.jpg |150px|thumb|Tip]]
|-
|}


<gallery>
''See also '''[http://ecee.colorado.edu/~kuester/Coax/connchart.htm Coax connector comparison]''' ''
File:Bnc female.jpg|BNC Female
File:Bnc male.jpg|BNC Male
</gallery>


==SMA==
==Non-coaxial low-voltage connectors==
SMA type are coaxial 50&nbsp;Ω connectors good to about 20&nbsp;GHz. 
The male connectors have a protruding center pin and ground shroud that screws on. 
The female is threaded on the outside.
(Note that in the "Reverse Polarity" or "RP-SMA" connectors found in WLAN equipment,
the pin is swapped to the shell with the exterior thread.)


SMA are somewhat similar to UHF connectors, but much smaller - initial Tektronix literature<sup>(Note1)</sup> calls them "3&nbsp;mm connectors" -
{| class="wikitable"
and with much tighter tolerances and better controlled impedance.  
|-
SMA connnectors are used on the [[S-50]], [[S-51]], [[S-52]], [[7T11]], [[S-4]], [[S-6]] and many later GHz-class
!colspan=2| [[Banana connector]]
instruments such as the [[:Category:11800 series sampling plugins|SD-xx]] series sampling heads.
!colspan=2| [[LEMO S-series connector]]
|-
| [[File:Banana plug.jpg|150px|thumb|Banana plug (original style)]]
| [[File:Banana jack.jpg|150px|thumb|Banana jack (Ext H input on [[502]])]]
| [[File:Lemo connector.jpg|150px|thumb|LEMO S-series male (on [[P6201]])]]
| [[File:Tek_7104_probe_power.jpg|150px|thumb|Probe power connector on rear panel of [[7104]]]]
|-
!colspan=2| [[GPIB connector]]
!colspan=2| [[Amphenol 165-15 connector]]
|-
| [[File:Gpib-connector.jpg|150px|thumb|GPIB connector on back of a Tektronix [[TDS210]] scope]]
| [[File:IEEE488_cable.jpg|150px|thumb|Stacking GPIB cable connector]]
| [[File:Tek 175 rear connector.jpg|150px|thumb|Rear Connector on [[175]]]]
| [[File:Tek 575 rear connector.JPG|150px|thumb|Rear Connector on [[575]]]]
|-
!colspan=2| [[XLR connector]]
!colspan=2| [[0.1" header]]
|-
| [[File:XLR connectors.jpg|150px|thumb| 3-pin XLR cable plug and socket]]
| [[File:XLR5_socket.jpg|150px|thumb| 5-pin XLR panel socket]]
| [[File:0.1in headers.jpg|150px|thumb| 0.1" pin headers with cable connectors]]
|
|}


(1) See [[Media:Service Scope 52 Oct 1968.pdf  | Service Scope No. 52, Oct 1968]] p.16, ''Something New in Oscilloscope Connectors''
==Power connectors==


<gallery>
{| class="wikitable"
File:Sma male.jpg|SMA Male
|-
File:Sma female.jpg|SMA Female
!colspan=2| [[IEC connector]]
</gallery>
!colspan=2| [[Octal connector]]
|-
| [[File:IEC.jpg|150px|thumb|IEC 320 (60320) C14 power inlet]]
| [[File:IEC320C13.jpg|150px|thumb|IEC 320 (60320) C13 cable plugs]]
| [[File:Octal plug.jpg|150px|thumb|Modern octal cable plug]]
| [[File:Octal_power_socket.jpg |150px|thumb| Octal power sockets on [[160]] series modules]]
|-
|}


==SMB==
SMB connectors are small snap-on RF connectors developed in the 1960's. 
They come in 50-ohm and 75-ohm variants.  Their RF performance in somewhat
inferior to SMA connectors, but they are more compact and have the convenience
of being snap-on instead of having a screw-on grounding nut.  They are used
in 1960's sampling and pulse gear like the [[1S1]], [[4S1]], and [[284]].
They are also used in later equipment like the [[DC5010]] and the [[7D15]].
In general, SMB connectors are more widely used inside of RF equipment (on module interconnects, for example) than on front panels where SMA is more frequently found.


* [http://w140.com/tyco_smb_connector_brochure.pdf Tyco SMB Connector Brochure (PDF)]


<gallery>
File:Smb on 4s1 sampler.jpg|SMB Connector as Strobe Input to [[4S1]] Sampler
File:Smb in tek 284.JPG|SMB Connector as Tripper Pulse Input to [[284]] Tunnel Diode
</gallery>
==GR-874==
The GR-874 is a hermaphroditic (asexual) RF connector developed by [[General Radio]] in the late 1940's. 
They are typically for 50 Ω impedance, but versions for 75 Ω and 125 Ω were available
using the same ground shield and housing, but different center pin geometry.
Different versions of the connector have different maxiumum voltage ratings;
1000 V is typical. There are locking and non-locking versions.
GR-874 connectors are carefully engineered to keep a constant impedance
throughout the signal path, by varying connector diameters between free-air
and dielectrically supported sections.  These connectors therefore exhibit
very little reflection and are well suited for gigahertz and pulse applications.
The Tektronix [[519]] uses a 125 Ω GR-874 connector which has
the same ground housing as the 50 Ω variant,
but has a center pin that is thinner and shaped differently. 
The regular 50 Ω version is used in the [[1S1]], [[1S2]],
[[3S1]], [[3S7]], [[3T7]], [[4S1]], [[4S2]], [[5T1]], [[5T1A]], [[5T3]], [[7M11]], [[N]], [[S-1]], [[S-2]], [[106]], [[109]], [[110]], [[113]], [[191]], [[280]], [[281]], [[282]], [[282]] and possibly others.
By the 1970s, GR-874 connectors were being supplanted by SMA connectors in test equipment,
see e.g. the progression from the [[S-1]] to the [[S-4]] sampling heads.
===Links===
* [[017-053]] adapter
* [http://w140.com/gr874_1973_gr_catalog.pdf GR-874 Section of 1973 General Radio Catalog (PDF)]
* [http://www.google.com/patents/US2548457 US Patent #2548457, Coaxial connector for high-frequency transmission lines]. Filed 10 Jan 1947, granted 10 Apr 1951.
===Pictures===
<gallery>
File:Gr874 connector.jpg
File:Gr874 plug.plug.jpg
File:gr874-50.jpg | 50 Ω GR-874 connector
File:gr874-125.jpg | 125 Ω GR-874 connector
File:50 versus 75 ohm gr874.jpg | Two 75 Ω and one 50 Ω GR-874 connectors
File:Various GR874 connectors.jpg | An assortment of GR-874 connectors and adapters
File:Gr 874-w50b.jpg|GR-874 50 Ω Terminator
File:Tek-7m11-front.jpg | [[7M11]] delay line front panel with four GR-874 connectors
File:S1-crop.jpg | GR-874 connector on [[S-1]] sampling head
File:US2548457.jpg | Patent drawings from US2548457
</gallery>
==Gremar==
Gremar made many different connectors, but Tek scopes seem to use only of one of their
connector systems.  So in the context of Tek scopes, "Gremar connector" refers to that system.
It is used in the [[661]] and [[568]] for trigger signals that are passed through the mainframe and
into the plug-ins.  It is a self-centering slide-in coaxial connector.
<gallery>
File:5t1a_coax_interconnect.jpg
</gallery>
==Peltola==
[[File:peltola-connector-drawing.jpg | 250px|thumb|right|schematic drawing of Peltola connector components]]
The Peltola coaxial connector was developed by [[Ron Peltola]] at Tektronix for in-house use.
These connectors are used extensively inside 7000-series scopes for all coaxial inter-board
signal wiring and plug-ins as well as in some other instruments of the era. 
According to the Tektronix website,
<blockquote>
The Male coaxial connector consists of the RG-174 coax center conductor as the male pin, with the braided shield pressed between two eyelets, part number 210-0775-00 (smaller one) and part number 210-0774-00 (larger one). The outer eyelet is then "dimpled" to secure the eyelet-shield-eyelet combination.
The Female (circuit board mounted) connector consists of 2 pieces. In the center is the socket pin connector, part number 136-0252-07 and the connector recepticle (with 3 circuit board mounting tabs), part number 131-1003-00.
The tool used to swedge the two pieces of the Peltola together was custom-made, tool-by-tool in the Tek machine shop. They began with an inexpensive, common parallel-jaw fish cleaning pliers. The two opposing jaws were replaced by a new set, the end of each machined with a "mouse hole", one the width of the outside diameter of the larger eyelet, the other the width of the outside diameter of the cable.  The smaller eyelet was placed over the end of the stripped cable and the braid spread out over the outside and trimmed off. Then the larger eyelet was positioned over the end of the smaller one, the tool carefully put into place, and the handles squeezed to press the eyelets together with the braid trapped between.  That was all.  There was no further dimpling step.
The Peltola shares simplicity and economy with the RCA phono connector common on stereo systems and the "F" connector, commonly used for television antenna connections. It's certain that the Peltola wins as the cheapest, simplest and highest-performance of the three.
</blockquote>
(See also [https://www.google.com/patents/US3742425 US Patent 3742425].)
Note that the shield may be at a non-ground potential. For example, the two connections between the interface board & readout board on the 7834 have their shields connected to the +15&nbsp;V rail.
<gallery>
File:Peltola-connectors-mated.jpg | Mated connectors
File:Peltola-connector-socket.jpg | Socket
File:Peltola-connector-side.jpg | Side view
File:Peltola-connector-tip.jpg | Tip
</gallery>
==UHF==
[[File:UHF_socket.jpg|200px|thumb|right|UHF socket (on a [[G|Type G]] plug-in)]]
The '''"[http://en.wikipedia.org/wiki/UHF_connector UHF connector]"''' is coaxial connector developed prior to WWII
as a [[Connectors#Banana|banana]] connector with a screw-on shield. The male is often called a PL-259, and the
female is often called an SO-239, following the old Signal Corps nomenclature.
Although it is called a "UHF" connector, the connector's construction does not provide for constant
impedance - it drops to 30-40 Ω for about a centimeter in the central region of the connector, which
means they create significant electrical signal reflections above 150 MHz. Consequently,
Manufacturers usually specify this connector as suitable for use up to 200 or 300 MHz only.
UHF sockets are used on many pieces of early Tektronix gear, initially having the advantage that
4&nbsp;mm (banana) plugs as used on earlier equipment could be inserted directly.
Like other test equipment manufacturers, Tektronix moved away from UHF connectors in the mid-1960s.
Tek provided kits that allowed owners or field technicians to convert instruments from UHF connectors
to [[Connectors#BNC|BNC connectors]], which are smaller, quicker to attach and remove, and have
better high-frequency characteristics (controlled impedance).
Contemporary use of UHF connectors is limited to niches like ham radio or marine radio gear, where
they are still popular for ease of assembly.
The UHF connector is used in the [[511]], [[512]], [[513]], [[514]], [[515]], [[516]], [[517]],
[[524]], [[525]], [[526]], [[531]], [[533]], [[535]], [[541]], [[543]], [[545]], [[551]], [[555]],
[[575]], [[127]], [[1121]], [[A]], [[B]], [[C]], [[D]], [[G]], [[H]], [[K]], [[L]], [[R]],
[[S]], [[T]], [[Z]], [[2A60]], [[60]], [[63]], [[72]], [[75]], [[104]], [[105]],
[[107]], [[013-045]], [[013-045]], [[013-001-00]], and [[360]].
<gallery>
File:013_045_5.jpg|The 013-045 has one male UHF connector and two female UHF connectors.
</gallery>
==Banana==
According to Wikipedia, the banana connector was invented in 1924 by Richard Hirschmann.
The male (plug) is a 4mm shaft that has a springy shroud so it fits snugly in the female (socket),
which is a 4mm hole.  In American equipment, when banana plugs are used in pairs (e.g., power and ground),
it is customary to place the two banana connectors 3/4" apart.  Although the 3/4" spacing is a de facto
standard in America, it is problematic in Europe, where a 3/4" double banana plug can easily be inserted
into a wall (mains) power receptacle by accident.
==N==
[[File:N connector.jpg|thumb|250px|right]]
The [http://en.wikipedia.org/wiki/N_connector N connector] is a threaded, weatherproof, medium-size RF connector used to join coaxial cables.
It was invented in the 1940s by Paul Neill of Bell Labs, after whom the initial was chosen
(although it is often claimed incorrectly that "N" is for "Navy").
The initial design was a 50&nbsp;Ω connector for military systems operating below 4 GHz.
In the 1960s, improvements pushed performance to 12 GHz and later to 18 GHz.
75&nbsp;Ω variants exist (using a smaller center conductor diameter) but are rare
(e.g. on some spectrum analyzers) and not compatible with 50&nbsp;Ω connectors.
The N connector is seen as the input connector for Tektronix spectrum analyzers [[1L20]],
[[1L30]], [[1L40]], and [[492]], the output on the [[108]] pulse generator, and others.
<gallery>
File:N conn mech.png
</gallery>
==BSM==
Several Tektronix products use BSM connectors, such as the [[7T11]], [[11B2]], [[3S2]], [[S-50]]. [[S-51]], and [[S-52]].
These look like minature [[Connectors#BNC|BNC connectors]].  They are much less common than BNC connectors.  There are two-lug variants
and three-lug variants.  Tektronix used the two-lug variant.  They are also sometimes called MB connectors.
The [[067-0587-01]] uses one for TRIG OUT.  The [[012-0127-00]] converts from BSM to BNC.
<gallery>
Image:7t11 bsm.jpg|BSM female on front lower right of 7T11
Image:Five bsm mb bnc.jpg|BSM to BNC adapters
Image:Bsm panel jack.jpg|BSM panel jack
</gallery>
==0.1" Header==
==IEC==
[[File:IEC.jpg|200px|thumb|right| IEC 320 (60320) C14 power inlet]]
IEC connectors are electrical power connectors specified by IEC standards. Mostly, the term is used for connectors in the [http://en.wikipedia.org/wiki/IEC_60320 IEC 320 standard] issued in 1970 (since re-numbered to IEC 60320), and most often for the ubiquitous C13 / C14 type mains power inlet connector.
==Lemo S-series==
LEMO is a Swiss connector company founded in 1946. 
Tektronix used LEMO connectors to provide power to probes.
[[7000-series scopes]] have this connector.
<gallery>
File:Tek_7104_probe_power.jpg|Probe power connector on rear panel of [[7104]].
</gallery>
==Octal==
In some Tektronix equipment such as the [[160]] series, an octal connector is used.  The plug resembles the bottom of a
tube like a [[6L6]].  The socket is an octal tube socket.  The 160 power supply has octal sockets on the back, and octal cables
bring the power to the modules such as the [[161]], [[162]], [[163]], and [[360]].
==XLR==
The XLR connector is most often used as a connector for microphone cables.  It is used in the Tektronix Type [[E]].
==Amphenol 165-15==
The Amphenol 165-15, which mates with a 165-14, is a MILSPEC connector with 9 #20 contacts and a current rating of 7.5A.
It is used for the cable that connects the [[175]] to the [[575]].
* [http://w140.com/amphenol_165.pdf Amphenol 165 Data Sheet (PDF)]
<gallery>
File:Tek 175 rear connector.jpg|Rear Connector on [[175]]
File:Tek 575 rear connector.JPG|Rear Connector on [[575]]
</gallery>
==GPIB==
[[Image:Gpib-connector.jpg|thumb|200px|right|GPIB connector on back of a Tektronix [[TDS210]] scope]]
[[GPIB interface|GPIB aka IEEE-488]] uses a 24-pin Amphenol-designed micro ribbon connector. Micro ribbon connectors have a D-shaped metal shell, but are larger than D-subminiature connectors. They are sometimes called "Centronics connectors" after the 36-pin micro ribbon connector that Centronics used for their printers.
==See also==
* [http://ecee.colorado.edu/~kuester/Coax/connchart.htm Coax connector comparison ]
[[Category:Electromechanical components]]
[[Category:Connectors]]
[[Category:Repair issues]]
[[Category:Repair issues]]
[[Category:Visual index pages]]
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