HP Agilent 33120A AWG Opt 001

There are some units on eBay, but the sellers mostly don’t know and describe them as having the “Opt 001” inside, a.k.a. 33120-80001, a.k.a. 33120-66503.

The Option 001 phase lock/TCXO timebase gives you the ability to generate synchronized phase-offset signals. An external clock input/output lets you synchronize with up to three other 33120As or with an external 10-MHz clock.

Please take note of the differences and do not sell with wrong description.

Without option
With option
Option itself

Symmetricom Rubidium Standard

This precious thing allows me to connect my GPSDO and have very stable 10MHz output, so all test equipment can use it as reference. The GPSDO itself provides very stable frequency, but has “only” an OCXO inside. So, long-time stability comes from GPS, but now short-time stablility also comes from the rubidium standard and not from the OCXO anymore. So more long- and short-time stability!

Actually this is a DOCSIS Timing Interface device. But, you can use it as 10MHz Rubidium Standard, because an X72 from Symmetricom is built in. There is also 10MHz reference input, which can be connected to GPSDO. So, the internal rubidium standard will be adjusted to the external 10MHz from GPSDO thus resulting in stable and clean 10MHz out of the rubidium oscillator.

And… having an atomic clock at home is really cool ;)

General logic ICs of the 74xx series

This is a list of number of pins and the function of general-purpose logic ICs of the 74xx series.

NameNamed Function of the ICPins
00Quad 2-Input NAND Gate14
02Quad 2-Input NOR Gate14
03Quad 2-Input NAND Gate Open Drain14
04Hex Inverter14
U04Hex Inverter14
05Hex Inverter Open Drain14
06Hex Inverter Buffers/Drivers Open Drain14
07Hex BufferOpen Drain14
08Quad 2-Input AND Gate14
09Quadruple 2-Input Positive-AND Gates With Open-Collector Outputs14
10Triple 3-Input NAND Gate14
11Triple 3-Input AND Gate14
14Hex Schmitt Inverter14
16Hex Inverter14
20Dual 4-Input NAND Gate14
21Dual 4-Input AND Gate14
27Triple 3-Input NOR Gate14
308-Input NAND Gate14
32Quad 2-Input OR Gate14
3313-Input NAND Gate14
38Quad 2-Input NAND Gate14
42BCD-to-Decimal Decoder16
45BCD to Decimal Decoder16
73Dual J-K Flip-Flop with Preset and Clear14
74Dual D-Type Flip-Flop with Preset and Clear14
754-bit Bistable Latch16
854-Bit Magnitude Comparator16
86Quad Exclusive -OR Gate14
107Dual J-K Flip-Flop with Clear14
109Dual J-K Flip-Flop with Preset and Clear16
112Dual J-K Flip-Flop with Preset and Clear16
121Monostable Multivibrator14
122Retriggerable Monostable Multivibrator14
123ADual Monostable Multivibrator16
125Quad Bus Buffer3-State14
126Quad Bus Buffer3-State14
128Hex OR-Gate Line Driver14
132Quad 2-Input Schmitt NAND Gate14
13313-Input NAND Gate16
1373 to 8 Line Decoder with Address Latch16
1383-to-8 Line Decoder16
139Dual 2-to-4 Line Decoder16
14710 to 4 Line Priority Encoder16
1488-to-3 Line Priority Encoder16
1518-Channel Multiplexer16
153Dual 4-Channel Multiplexer16
1544-to-16 Line Decoder24
155Dual 2-to-4 Line Decoder16
157Quad 2-Channel Multiplexer16
158Quad 2-Channel Multiplexerinverted16
161Sync. Binary Counter with Async. Clear16
163Sync. Binary Counter with Sync. Clear16
1648-bit serial in / parallel-out shift register14
1658-bit parallel-in / serial-out shift register16
1668-bit parallel-in / serial-out shift register16
173Quad D-Type Register3-State16
174Hex D-Type Flip-Flop with Clear16
175Quad D-Type Flip-Flop with Clear16
1914-bit BInary up/down Counter16
193Sync. up/down Binary Counter16
221ADual Monostable Multivibrator16
2373-to-8 Line Decoder/Latch16
2383-to-8 Line Decoder16
240Octal Bus Buffer3-state, inverted20
241Octal Bus Buffer3-state20
244Octal Bus Buffer3-state20
245Octal Bus Transceiver3-state20
2518-Channel Multiplexer3-state16
253Dual 4-Channel Multiplexer3-state16
257Quad 2-Channel Multiplexer3-state16
2598-Bit Addressable Latch16
273Octal D-Type Flip-Flop with Clear20
279Quad S-R Latch16
2809-Bit Parity Generator/Checker14
2834-Bit Binary Full Adder16
294Programmable Frequency Divider/Timer16
2998-Bit PIPO Shift Register20
3548 to 1 Line Date Selector/MultiPrexer20
365Hex Bus Buffer3-state16
366Hex Bus Buffer3-state, inverted16
367Hex Bus Buffer3-state16
368Hex Bus Buffer3-state, inverted16
373Octal D-Type Latch3-state20
374Octal D-Type Flip-Flop3-state20
375Quad D-Type Latch16
377Octal D-Type Flip-Flop20
390Dual Decade Counter16
393Dual Binary Counter14
423ADual Monostable Multivibrator16
5218-Bit Equality Comparator20
534Octal D-Type Flip-Flop3-State, Inverted20
540Octal Bus Buffer3-state, inverted20
541Octal Bus Buffer3-state20
564Octal D-Type Flip-Flop3-State, Inverted20
573Octal D-Type Latch3-state20
574Octal D-Type Flip-Flop3-state20
580Octal D-Type Latch3-state20
5908-Bit Binary Counter/register3-state16
5928-Bit Register/Binary Counter16
5948-Bit Shift Registers With Output Registers16
5958-Bit Shift Register/Latch3-state16
5978-Bit Latch/Shift Register16
624Single Voltage-controlled oscillator14
640Octal Bus Transceiver3-state, inverted20
645Octal Bus Transceiver3-state20
646Octal Bus TransceiverRegister3-State24
652Octal Bus TransceiverRegister3-State24
6704-Word x 4-Bit Register File3-state16
67416-bit Serial In/Out Parallel-Out Storage register24
6888-Bit Equality Comparator20
697U/D 4-Bit Binary Counter/register3-state20
873Dual 4 bit D-Type Latch3-state24
2244Octal Bus Buffer 3-State20
2245Octal Bus Transceiver20
3245Octal Bus Transceiver3-state24
C3245Dual Supply Octal Bus Transceiver3-state24
4002Dual 4-Input Positive NOR Gate14
4017Decade Counter/Divider16
402014-Stage Binary Counter16
40247-Stage Binary Counter14
4028BCD-to-Decimal Decoder16
404012-Stage Binary Counter16
4046Phase-Locked Loop with VCO16
4049Hex-Inverting Buffer/Converter16
4050Hex Non-Inverting Buffer/Converter16
4051Single 8-Channel Analog Multiplexer/Demultiplexer16
4051ASingle 8-Channel Analog Multiplexer/Demultiplexer16
4052Dual 4-Channel Analog Multiplexer/Demultiplexer16
4052ADual 4-Channel Analog Multiplexer/Demultiplexer16
4053Triple 2-Channel Analog Multiplexer/Demultiplexer16
4053ATriple 2-Channel Analog Multiplexer/Demultiplexer16
406014-Stage Binary Counter/Oscillator16
4066Quad Bilateral Switch14
4072Dual 4-Input Positive OR Gate14
4075Triple 3-Input Positive OR Gate14
40788-Input Positive OR/NOR Gate14
40948-Stage Shift-and-Store Bus Register16
4245Dual Supply Octal Bus Transceiver3-state24
4511BCD-to-7-Segment Latch/Decoder/Driver16
45144-Bit Latch4-to-16 Line Decoder24
4520Dual Binary up Counter16
4538Dual Precision Mono Multivibrator16
7046Phase-Locked Loop with VCO16
7240Octal Bus Buffer3-state, inverted20
7244Octal Bus Buffer3-state20
7266Quad Exclusive-NOR Gate14
7292Programmable Divider/Timer16
1624016-Bit Bus Buffer 3-State48
1624116-Bit Bus Buffer 3-State48
1624416-Bit Bus Buffer 3-State48
1624516-Bit Bus Transceiver3-State48
1637316-Bit D-Type Latch3-State48
1637416-Bit D-Type Flip-Flop3-State48
1664616-Bit Bus TransceiverRegister3-State56
1665216-Bit Bus TransceiverRegister3-State56
40102Dual BCD Programmable down Counter16
401038-Bit Binary Programmable down Counter16
401054-Bit×16-Word FIFO Register16
163245Dual Supply 16-Bit Bus Transceiver with Series Res48
164245Dual Supply 16-Bit Bus Transceiver with Series Res48

As there are many suppliers, please see the data sheet of each supplier for details.

View 500MHz on Tektronix TDS380

This is how the old good Tektronix TDS380 acquires a 500MHz signal from Marconi Instruments 2031 signal generator. Very stable, calm trigger and display. No jumping around, albeit using 16x averaging.

And this is a picture of how 800MHz signal looks on the same scope.

And, last image is, the same setup, but a 1GHz signal, same scope.

Playing with the oscilloscope

This is frequency modulated signal on a oscilloscope, but the carrier frequency is lower than the modulation frequency.

In XY mode, two signals and all zoomed. Had much fun changing the frequencies and wave forms. Endlessly interesting patterns.

The special pattern you see has something to do with the oscilloscope’s internal 10kHz trigger frequency. But it’s just a guess. It could also be a ground loop problem.