P6046: Difference between revisions

Latest revision as of 06:14, 28 January 2024

Tektronix P6046

100 MHz differential probe

Compatible with 50 Ω scope inputs

Produced from 1968 to 1992

Manuals

There are three versions of the manual:

070-0756-00 - 1968 − assumes 1A5 for absolute gain calibration
070-7129-00 - 1988
070-7129-01 - 1992

Manuals – Specifications – Links – Pictures

The Tektronix P6046 is a 100 MHz differential probe oscilloscope probe introduced in 1968 and discontinued sometime after 1992. It was designed by Glenn Bateman.

It was initially intended for use with a 1A5 plug-in, to which it attaches through a 9-pin Amphenol 165 series connector.

A separate amplifier (015-0106-00) was available as an option to use the probe on a 50 Ω input scope set at 10 mV/Div.

An additional ×10 attenuator (010-0361-00) can be plugged onto the P6046's inputs.

Note that the probe itself acts as either a 1× or 10× attenuation probe dependent on a signal voltage on pin D of the connector. When used with the amplifier, 10× mode is used in the 200, 100, and 50 mV/div settings and 1× mode for 20, 10, 5, 2, and 1 mV/div.

Key Specifications

Bandwidth	45 MHz with 1A5; 100 MHz with amplifier; AC low frequency cut-off 20 Hz (2 Hz with ×10 head)
Input impedance	1 MΩ // 10 pF (with ×10 head, 10 MΩ // 3 pF)
Common-mode range	±5 V DC+peak AC up to 10 MHz, decreasing to ±2 V at 50 MHz
Maximum Allowable Input	25 V total DC+peak AC, 25 V total difference between + and − input tips

Operation

The two probe tips are (in DC mode) directly connected to the gates of a pair of JFETs.

Use the shorting plugs on the tips when not in use:

Ground the probe! Seriously. Sticker the probe "Ground Me!" I also recommend stickering the probe amplifier with the ATTEN BAL setup procedure from section 2-6 of the manual.

Links

Documents Referencing P6046

Document	Class	Title	Authors	Year	Links
Service Scope 46 Oct 1967.pdf	Article	P6046 DC-to-100 MHz Differential Probe and Amplifier	Glenn Bateman	1967	P6046
Tekscope 1972 V4 N5 Sep 1972.pdf	Article	A Practical Approach to Differential Amplifiers and Measurements	Fred Beckett	1972	112 • 11A33 • 1A5 • 1A6 • 1A7 • 1A7A • 26A2 • 3A9 • 5A22N • 7A13 • 7A22 • AM502 • D • E • G • P6055 • P6046 • W • Z
Tekscope 1972 V4 N6 Nov 1972.pdf	Article	Differential Amplifiers and Measurements, Part 2	Fred Beckett	1972	112 • 11A33 • 1A5 • 1A6 • 1A7 • 1A7A • 26A2 • 3A9 • 5A22N • 7A13 • 7A22 • AM502 • D • E • G • P6055 • P6046 • W • Z

Pictures

P6046
P6046
015-0106-00 amplifier and power supply

@@ Line 1: / Line 1: @@
-[[Image:Tek P6046 catalog 2.jpg|350px|thumb|right|Tektronix P6046 Differential Probe and 015-0106-00 Amplifier]]
+{{Probe Sidebar
-The '''Tektronix P6046''' is a 45/100 MHz differential probe oscilloscope probe.
+|manufacturer=Tektronix
-It was initially intended for use with a [[1A5]], to which it attaches through a 9-pin [[Amphenol 165 series connector]].
+|model=P6046
+|summary=100 MHz differential probe
+|image=Tek P6046 catalog 2.jpg
+|caption=Tektronix P6046 Differential Probe and 015-0106-00 Amplifier
+|for=50 Ω scope inputs
+|introduced=1968
+|discontinued=1992
+|designers=Glenn Bateman
+|manuals=
+There are three versions of the manual:
+* [[Media:070-0756-00.pdf|070-0756-00 - 1968]] − assumes [[1A5]] for absolute gain calibration
+* [[Media:070-7129-00.pdf|070-7129-00 - 1988]]
+* [[Media:070-7129-01.pdf|070-7129-01 - 1992]]
-A separate amplifier (015-0106-00) was available as an option to use the probe on a 50 Ω input scope set at 10 mV/Div.
+* [[Media:P6046 Voltage and Waveform Information.pdf|P6046 Voltage and Waveform Information]]
+* [[Media:P6046 Schematics Rev. C June 1977 11x17.pdf|P6046 Schematics Rev. C June 1977]]
-With a 1A5, the P6046 has a 45 MHz bandwidth.  The raw bandwidth of the probe and amplifier is 100 MHz.
+* [[Media:Tek p6046 eis signature page.pdf|P6046 Engineering Instrument Specification Signature Page]]
-Note that the probe itself acts as either a 1× or 10× attenuation probe dependent on a signal
+* [[Media:Tek p6046 fcp march 1968.pdf|P6046 Factory Calibration Procedure, March 1968]]
-voltage on pin D of the connector.  When used with the amplifier, 10× mode is used in the
+}}
-, 100, and 50 mV/DIV settings and 1× mode for 20, 10, 5, 2, and 1 mV/DIV.
+The '''Tektronix P6046''' is a 100 MHz differential probe oscilloscope probe [[introduced in 1968]] and discontinued sometime after 1992.
+It was designed by [[Glenn Bateman]].
-An additional  ×10 attenuator (010-0361-00) can be plugged onto the P6046's inputs.
+It was initially intended for use with a [[1A5|1A5 plug-in]], to which it attaches through a 9-pin [[Amphenol 165 series connector]].
-==Operation==
+A separate amplifier (015-0106-00) was available as an option to use the probe on a 50 Ω input scope set at 10 mV/Div.
-Ground the probe!  Seriously.  Sticker the probe "Ground Me!"  The two probe tips are
+An additional ×10 attenuator (010-0361-00) can be plugged onto the P6046's inputs.
-(in DC mode) directly connected to the gates of a pair of JFETs.  Use the shorting plugs
-on the tips when not in use.  I also recommend stickering the probe amplifier with the
-ATTEN BAL setup proceedure from section 2-6 of the manual.
-==Repair Issues==
+Note that the probe itself acts as either a 1× or 10× attenuation probe dependent on a signal voltage on pin D of the connector.
+When used with the amplifier, 10× mode is used in the 200, 100, and 50 mV/div settings and 1× mode for 20, 10, 5, 2, and 1 mV/div.
-Pay attention to the maintenance section of the manual about the operation of
+{{BeginSpecs}}
-the P6046 outside its housing.  The bottom section of housing ties the circuit
+{{Spec | Bandwidth | 45 MHz with 1A5; 100 MHz with amplifier; AC low frequency cut-off 20 Hz (2 Hz with ×10 head) }}
-grounds together.  The schematic diagram calls out four different grounds:  The cable
+{{Spec | Input impedance | 1 MΩ // 10 pF (with ×10 head, 10 MΩ // 3 pF) }}
-(using the three line earth symbol), the front posts (triangle-1), the middle mounting
+{{Spec | Common-mode range | ±5 V DC+peak AC up to 10 MHz, decreasing to ±2 V at 50 MHz }}
-screw (triangle-2) and the rear posts (triangle-3).  When operating the probe without
+{{Spec | Maximum Allowable Input | 25 V total DC+peak AC, 25 V total difference between + and − input tips }}
-the top housing, reattach a front and rear post screw to hold the board down to the
-lower housing.  When operating the probe with no housings, tie a front and a rear post
-together with a jumper.  The center circuit board mounting screw ground is only used
-for the high frequency CMRR adjustments and none of those will work without both
-housings in place.
-The input FETs must be a matched pair.  A possible replacement is the 2N4416A in a metal
+{{EndSpecs}}
-TO-72 package with the substrate pin provided as in the factory part 153-0559-00.  It is
-pretty expensive; currently (2014) it's about $6 US dollars each.
-Another much cheaper replacement is the 2N3819 in a plastic TO-92 package.
-The matching criteria should be Idss.
-If the "DRAIN VOLTS" adjustment step (R125) fails, check and replace R124.  It is a 270K,
+==Operation==
-/10W carbon composition resistor and it will eventually drift high so the 10.5V drain voltage
-can not be reached.  The calibration section is not clear about the settings for this
-measurement, but the schematic diagram shows the voltage measured with 200 mV/DIV set
-on the amplifier.
-==Calibration==
-<blockquote>
-The Tektronix P-6046 is excellent, and usually quite inexpensive because nobody knows what it is.
-Make sure it works when you buy it, because these probes are extraordinarily tricky to trim up for CMRR after repair.
-  -- [[Jim Williams]], ''The Art of Analog Circuit Design''
-</blockquote>
-Newer versions of the probe have plastic plugs that allow access to the following adjustments
-* R209 - 42 MHz CM balance
-* C209 - 18 MHz CM balance (and drain voltage measurement)
-* C245 - 50 MHz CM balance
-* R155 - Gain
-The full calibration shield has access to all ten adjustments.  You will need
-to make this by drilling holes in a housing.  The full shield is needed to
-recalibrate a probe after replacing the input fets.  Some used probes will
-be found with an access hole drilled for R235 (GAIN SWITCHING BALANCE) since this
-is adjusted to remove the trace shift when the probe switches from 1× to 10× mode.
-To calibrate the amplifier, first check the power supply voltages.  They are floating.
-Do not check with respect to ground!  When adjusting, watch for exposed line voltage
-in the power supply, especially the fuse holder.  The power supply must be adjusted
-with everything connected together.  Note that you can check the voltages from the
-back of the amplifier output board.
-==Manuals==
-* [[Media:Tek p6046 fcp march 1968.pdf]]
-There are three versions of the manual
-* [[Media:070-0756-00.pdf|070-0756-00 - (C) 1968]]
+The two probe tips are (in DC mode) directly connected to the gates of a pair of JFETs.
-* [[Media:070-7129-00.pdf|070-7129-00 - (C) 1988]]
-* [[Media:070-7129-00.pdf|070-7129-01 - (C) 1992]]
-The 1968 version assumes you have a [[1A5]] for absolute gain calibration of the probe
-without the amplifier.
-* [http://w140.com/Tektronix_P6046_Instruction_Manual.pdf P6046 Manual (no schematics, PDF)]
+Use the shorting plugs on the tips when not in use:
-* [http://w140.com/Tek_P6046_Differential_Probe-Operation_Manual.pdf P6046 Detailed Manual (no schematics, PDF)]
+<blockquote>Ground the probe!  Seriously.  Sticker the probe "Ground Me!"  I also recommend stickering the probe amplifier with the ATTEN BAL setup procedure from section 2-6 of the manual.</blockquote>
-* [http://w140.com/P6046_8.5x11.pdf P6046 Voltage and Waveform Information (PDF)]
-* [http://w140.com/P6046_17x11.pdf P6046 Schematics (PDF)]
-* [[Media:Tek p6046 eis signature page.pdf|P6046 Engineering Instrument Specification Signature Page (PDF)]]
 ==Links==
 * [http://www.i9t.net/p6046/p6046.html P6046 @ iceNINE Tech]
-* [http://www.amplifier.cd/Test_Equipment/Tektronix/Tektronix_other/P6046.htm P6046 @ amplifier.cd]
+* [https://www.amplifier.cd/Test_Equipment/Tektronix/Tektronix_other/P6046.htm P6046 @ amplifier.cd]
+{{Documents|Link=P6046}}
 ==Pictures==
 <gallery>
+P6046_1.jpg | P6046
+P6046_2.jpg | P6046
 Tek p6046 internal1.jpg
 Tek p6046 internal2.jpg