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AM - Amplifiers
	AM501 Operational Amplifier Output drives +/-40V & 50mA into 800 ohms, unity gain at 5MHz into this load Slew rate of 50V/uS (into 800 ohms) DIfferential input range of 80V CMMR of 60Hz >20,000, input leakage <500nA @25C Various plug-ins and overlays are available to expand the functionality of this module (013-0146-00)
	AM502 Differential Amplifier Gain = 1 - 100,000 Max BW = 1 MHz Max common-mode voltage = +/- 50V Can convert differential signals to single-ended for 'scope measurement Adjustable filtering/knees (similar to the 5A22N / 7A22 scope plugins)
	AM503 Current Probe Amplifier Uses probe A6302 (100A, DC - 15MHz) or A6303 (1mA - 20A, DC - 50MHz) The AM503S version came in a TM502, and included the "Tool Box Module" (016-0362-02) There were also A, B, and C versions; this was perhaps the longest-lived plugin, sold until at least the late 90's
	AM511 Preamplifier for use with 7L12 and 7L13 spectrum analyzers
DM - Digital Multimeters
	DM501 4.5 digit "Rotary version" Includes temperature measurement capability
	DM501A 4.5 digit "Pushbutton edition" Includes temperature measurement capability dB "True" RMS (crest factor 2-4)
	DM502 3.5 digit Does all measurements (V, A, & R) from two terminals
	DM502A 3.5 digit Includes temperature measurement capability Can autorange dB "True" RMS (crest factor 2-4)
	DM504A Very simple 4.5 digit meter Temperature capability Autoranging, with unusual "up/down" manual ranging mode (note: a DM504 does not appear to have existed)
	DM505 3.5 digit Simple, basic, and cheap.
	DM511 Unclear whether Tek sold this one or only Tegam (the people who bought the TM500/TM5000 line from Tek). Basically a DM5110 with the GPIB removed. 4.5 Digit, with a 3.5 digit "fast" mode Front panel uses some sort of "soft-key" menu-based system Autoranging capability
FG - Function Generators
	FG501 1 MHz 0.001 Hz - 1 MHz Sine, square, triangle, ramp, pulse
	FG501A 2 MHz 0.002 Hz -2 MHz Sine, square, triangle, ramp, pulse 30Vp-p, +/-13V offset 25nS rise time, 50 ohm source 0.25% sine distortion (suited to audio work) Trigger, gating, phase control Step attentuator, variable symmetry
	FG502 11 MHz 0.1 Hz -11 MHz Sine, square, triangle, +/- ramp, +/- pulse VCF & gating
	FG503 3 MHz 1.0 Hz - 3 MHz Sine, square, triangle VCF, trigger out 10Vp-p into 50 ohms, 20Vp-p open circuit Custom "decade" multiplier setting possible
	FG504 40 MHz 0.001 Hz - 40 MHz Sine, square, triangle, ramp, pulse, sweeping Misc shaping (symmetry, rise & fall time adj, etc.) 30Vp-p open circuit AM & FM, phase-lock input, gating, trigger
	FG507 2 MHz 0.002 Hz - 2 MHz Sweeping
SC - Oscilloscopes
	SC501 5MHz Single-Channel Oscilloscope Smallest 'scope in the line (one unit wide!) One channel Strange method of choosing time/voltage/division
	SC502 15MHz Oscilloscope General-purpose 'scope Two channels
	SC503 10MHz Storage Oscilloscope Only storage 'scope in the line Two channels
	SC504 80MHz Oscilloscope Fastest 'scope in the line Two channels I heard it's pretty noisy (electrically)...
PG - Pulse Generators
	PG501 5 Hz - 50 MHz True and inverted outputs Adjustable (variable) duty cycle and period Rated at "<= 3.5nS transistions", mine does 2nS Independantly adjustable output voltage Specified only for 50 ohm use (huh?)
	PG502 10 Hz - 250 MHz 1nS transition time
	PG503 "The Good One" 10 Hz - 250 Hz 250pS transition time (!)
	PG505 1 Hz - 100 KHz 80V output (!) (Would be good for driving ultrasonic transducers, I'd bet)
	PG506 10Hz - 1 MHz Intended for calibration use, includes error readout
	PG506A Similar specs to PG506
	PG507 5 Hz - 50 MHz Dual output
	PG508 .5 Hz - 50 MHz Independant rise/fall time adjustment, delay
	PG509 Fixed 25V p-p, 350pS rise time (!) Apparantly very rare
PS - Power Supplies
	PS501 Single Output Basic supply Floating 0-20V @ 400mA supply with adjustable current limit
	PS501-1 Dual Output Fine-Adjustable Fixed 5V @ 1A supply Fine-adjustable 0-20V @ 400mA floating supply, with adjustable current limit
	PS501-2 Dual Output Metered Similar specs to PS501-1 Analog meter can be configured to read current OR voltage from adjustable supply
	PS502 Dual Output Fixed 5V @ 1A supply Adjustable +/- 10-20V @ 400mA floating supplies (positive and negative outputs track)
	PS503 Triple Output Fixed 5V @ 1A supply Fine-adjustable +/- 0-20V @ 400mA floating supplies, with independant adjustable current limits Adjustable supplies can be set to track
	PS503A High-Power Triple Output Higher-power version of PS503 Adjustable supplies capable of 1A max in high-power compartment; indicated if not available Adjustable supplies can be set to track
	PS505 - Logic Supply Meant for logic design, in times when a large ~5V supply was needed for TTL; also good for ECL via floating supply (operating inverted) Adjustable 3-5.5V @ 4A supply, with adj. current limit Supply is designed to float relative to ground, output limited if non-floated
TR - Tracking Generators
	TR501 For use with the 7L12 and 7L13
	TR502 Similar to the TR501; newer
	TR503 100 KHz - 1.8 GHz For use with 492 and 496 spectrum analyzers
Misc Tektronix Plugins (inc. those not part of a series and prototypes)
	AA501 Distortion Analyzer
	AA501A Distortion Analyzer
	AA501A Mod WQ Distortion Analyzer
	AF501 Audio Bandpass Filter Tunable audio bandpass filter, to 35KHz
	DD501 Digital Delay Divide by N up to 20MHz Delay to 99,999 events Pulse counting up to 65MHz Time delay (with ext. clock) Zin = 1Meg, Vout =~ TTL range
	DL501 Digital Latch Often used with the LA501 Stores narrow data based on externally applied trigger 16 channels
	DP501 Digital Prescaler For use with lower-frequency counters Input up to 1.3GHz
	LA501 Logic Analyzer Sometimes known as the LA501W (when connected semi-permanently with the (optional) WR501)
	MR501 XYZ Monitor Pure XYZ inputs - ranges and positions adjustable X & Y: BW = DC - 2MHz, Zin = 1Meg, Vin = 10mV-10V Z: BW = DC - 200kHz, Zin = 10K, Vin = 0 -5V Can be used with one of the Sweep Generator (or Ramp Generator) modules as a basic oscilloscope
	RG501 Ramp Generator 10uS -10S ramp duration
	SW503 RF Sweep Generator 1MHz - 400MHz Markers at 1, 10, 50MHz intervals Can interface with a DC508 Opt 7 counter to display freqency Designed by Wavetek Meant for Cable TV industry
	TG501 Time Mark Generator 1nS - 1S range, error % readout
	WR501 Word Recognizer Used with the LA501 All sorts of features, just look at the higher-rez image...
	SA501 Signature Analyzer AKA 067-1090-00 Signature analysis was a sort of poor-man's logic analysis, popular in the late 70's for troubleshooting (rahter than debug) - look it up, it's kind of interesting...
	Digital Sweep Generator
	TVC501 Time-Interval to Voltage Converter A (rare!) plugin, basically a F-V converter 1sec to 1us/division (whatever that means!)
	Setup/Hold Time Test Fixture AKA 067-1037-00 Presumably for something like Logic Analyzer calibration?
	Microwave Comb Generator AKA 067-0885-00 A calibration fixture for microwave spectrum analyzers. It consists of a signal source, a coaxial cable, and a comb generator module. The output of signal source is applied to comb generator module via the coaxial cable. The 500 MHz signal source can be frequency or pulse-modulated externally. When the output of signal source is applied to the comb generator, a comb line (spectrum) of markers is generated, which are harmonics of fundamental 500 MHz. The crystal controlled source provides an accurate reference to check frequency readout accuracies up to 20 GHz. (from eBay) Also: see this image of the spectrum generated.
	Pattern Generator Some sort of CRT tester
Other People's Plugins
	High Resolution Test Generator Seen in an eBay auction, paired with a PG501 in a TM503 More info unknown
	Spectracom 8131, 8132, 8150 Frequency Standards A precision frequency standard oscillator with battery-backup and a phase comparator Switch selectable output at 100 KHz, 1 MHz, 5 MHz, or 10 MHz Front panel thumb wheel fine adjustment of output in parts of 10 to the 10th. Puts out clean square waves into a 50 Ohm load.
	Bennett 31109 Test Module Seen in an eBay auction with a DM501A and DC504 in a TM503 More info unknown
	Interactive Concepts DS3217B Digital Channel Simulator Presumably some sort of communications network test equipment Seen in an eBay auction, more info unknown
	Oregon Analog Tools ZIG-T This company (as of 2005) makes TM500 and 7000-series amplifiers. The ZIG-T is an ultra-high input impedance amp/buffer.
	Ball Screw Test Fixture On the side is a hand written sticker that says Ball-screw test set up, F=12.0Mhz, Level +.75V, CHRT Span = 500 MV, Speed.=15cm/hr. (via eBay)
	City of Hope ECG The "City of Hope" is apparently a cancer research and treatment center in a large medical institution on the West Coast. I hear that they do some pretty good things for children. Found on eBay.
	PTB-100 Precision Time Base Made by the Ball Corp (?) (the canning people !?) Appears to be a precision frequency reference.
	NCSL Frequency Translator