7A42: Difference between revisions

Revision as of 07:11, 23 September 2023

Tektronix 7A42

350 MHz four-channel logic triggered amplifier

Compatible with 7000-series scopes

Produced from 1984 to 1990

Manuals

ROM images

(All manuals in PDF format unless noted otherwise)

The Tektronix 7A42 is a four-channel 350 MHz plug-in for 7000-series scopes.

It was specifically designed for logic signals (TTL, ECL, CMOS) and supports triggering based on Boolean conditions of the four inputs.

A fifth trace, "Trigger View", displays the trigger function output or external clock input.

The input V/Div setting can only be seen in the mainframe's readout.

Tektronix recommended the P6131, 300 MHz, 10 MΩ ×10 probe, and the P6230, 1.5 GHz, 450/50 Ω ×10, variable-offset probe for ECL circuits.

The 067-1155-99 calibration fixture is specific to the 7A42.

Bandwidth	350 MHz
Deflection	0.1 / 0.2 / 0.5 V/Div (TTL mode) 20 / 50 / 100 mV/Div (ECL mode) each direct or through 10:1 probe
Input impedance	1 MΩ // 15 pF or 50 Ω
Max. input voltage	at 1 MΩ: 25 V (DC+peak AC) below 36 MHz, down to 3 V_AC at 300 MHz at 50 Ω: 5 V_RMS during any 1 ms interval
Trigger level	−1.27 to +1.28 V (TTL mode) in 10 mV steps −254 mV to +256 mV (ECL mode) in 2 mV steps (or ×10)
Hysteresis	40 mV (TTL), 8 mV (ECL) (or ×10)
Features	NiCd battery to preserve front-panel control status
Weight	2.8 kg / 6.2 lb

The 7A42's functions are controlled by an Intel 8085A microprocessor.

Each of the four input attenuator circuits contains five miniature relays. The bistable relay coils are wired in a 4x5 matrix.

The 7A42 contains its own switch mode PSU, based on an SG3524 controller, that generates +5 V, −2 V and −5 V from the mainframe's ±50 V rails.

Part	Part Number(s)	Class	Description	Used in
148-0145-00	148-0145-00	Discrete component	miniature bi-stable relay actuator	7A42 • 119-1517-00
155-0038-01	155-0038-00 • 155-0038-01	Monolithic integrated circuit	5-bit current source D/A converter	7A42 • 7D13 • 7D14 • 7M13 • T4005
155-0078-00	155-0078-xx • 155-0273-00 • 155-0274-00	Monolithic integrated circuit	broadband amplifier	464 • 465 • 466 • 468 • 475 • 475A • 475M • 485 • 7834 • 7844 • 7854 • 7904 • R7903 • R7912 • 7912AD • 7912HB • 7104 • 7A16A • 7A16P • 7A24 • 7A26 • 7A42 • 067-0587-01 • 067-0680-00 • AM503 • PG502 • PG508 • DC510 • DC5010 • FG5010
155-0236-00	155-0236-00	Hybrid integrated circuit	channel switch	2445 • 2465 • 2467 • 7A42
ICM7218	156-1621-00 • 156-1622-00	Monolithic integrated circuit	8-digit, 7-segment LED driver	7A42 • SG5010
Intel 8085A	156-1088-00	Monolithic integrated circuit	8-bit microprocessor	308 • 468 • 4025 • 7A42 • 7D02 • AFG5101 • AFG5102 • PFG5105
Intel 8279	156-1535-00	Monolithic integrated circuit	keyboard controller	7A42 • AFG5101 • DM5010 • FG5010 • PFG5105
SG3524	156-0933-00 • 156-0933-01 • 156-1585-00 • 156-1585-01	Monolithic integrated circuit	PWM switch-mode controller	067-1011-00 • 1502B • 1502C • 1503B • 1503C • 7A42 • DP100

@@ Line 1: / Line 1: @@
-{{Plugin Sidebar |
+{{Plugin Sidebar
-manufacturer=Tektronix | type=7A42|
+|manufacturer=Tektronix
-summary=350 MHz four-channel logic triggered amplifier|
+|series=7000-series scopes
-image=Tek-7a42-crop.jpg |
+|type=7A42
-caption=7A42 front view|
+|summary=350 MHz four-channel logic triggered amplifier
-introduced=1984 |
+|image=Tek-7a42-crop.jpg
-discontinued=1990 |
+|caption=7A42 front view
-series=7000-series scopes|
+|introduced=1984
-manuals=
+|discontinued=1990
+|manuals=
 * [[Media:070-4285-00.pdf|7A42 Operator Manual]] (OCR)
 * 7A42 Service Manual
@@ Line 90: / Line 91: @@
 </gallery>
-{{Custom ICs|7A42}}
+==Components==
+{{Parts|7A42}}
 [[Category:7000 series vertical plugins]]