THS720

The Tektronix THS720 is a portable 100 MHz, 500 MS/s (each channel) dual-channel digital oscilloscope with isolated inputs. There were two variants, the THS720 STD and the THS720A. The primary difference is that the THS720A will trigger from the DMM input.

Tektronix THS720

100 MHz 2-ch portable digital scope

Produced from (?) to (?)

Manuals

THS710, 720

THS710A, 720A, 720P, 730A

THS720A, 720P, 730A Release Notes 061-4241-01
User 070-9731-05
Other versions: -03 / -01
Reference 070-9741-01
Other versions: -00
Service 070-9752-02
Other versions: -01 / -00
Programmer 070-9751-01

Other

Tektronix THS700 Series Product Brochure (2006)

(All manuals in PDF format unless noted otherwise)

Manuals – Specifications – Links – Pictures

The THS720P includes features for electrical/power electronics measurements.

THS700 series high voltage isolated front end design was done by Murlan Kaufman.

Key Specifications

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Operation

Due to the isolated inputs, the probe ground must be connected even when compensating the probes with the "PROBE COMP" output. It can be used with any BNC probe but the scale factor pin found on many Tektronix probes is not used. The vertical menu has a scale factor entry (1×, 10×, 100×, 1000×) which can also be used for direct BNC inputs.

Recommended probes are the P5102 and the P6113B, both are 10× probes with protected grounds for isolated measurements. The P5102 has the best isolation, allowing 600 V between reference ground and earth ground.

Internals

Primary microprocessor is the Motorola/Freescale MC68331CFC16. An Intel E28F008SA120 Flash Memory chip is used for setup, cal and waveform storage. The switching power supply is run by a TL1451A, a TI two channel boost/buck controller. The DMM is a 3¾-digit Maxim MAX134CQH.

The analog scope section starts with an attenuator hybrid driven by four channels of HP (now Avago) optoisolators and NEC relays. The hybrid contains the AC coupling capacitor and many laser trimmed resistors along with a custom Tek 165-2545-00 BGA. The signal then passes through a single-ended to differential transformer and goes to a custom labeled Maxim two-channel high speed A/D converter 234-1503-20. Note that the differential signal layout for channel 2 is not as good as channel 1 since one side of channel 2 goes through 2 vias not found on channel 1.

Included Accessories

P6113B - 10X, 100 MHz, CAT II, 300 V_RMS Passive probes (THS710STD, THS720STD)
P6117 - 10X, 200 MHz, CAT II, 300 V_RMS Passive probes (THS730A, THS720A, THS710A)
P5102 - 10X, 100 MHz, CAT II, 1000 V_RMS Passive probes (THS720P)
012-1482-00 - Meter lead set
THS7BAT - 4.8 V, 2.8 Ahr Ni-Cd Battery pack
AC Power Adapter
- 119-4812-XX - North America
- 119-4813-XX - Universal European
- 119-4922-XX - United Kingdom
- 119-4923-XX - Japan
012-1364-00 - 2m RS-232 cable (8p8c RJ45 'console cable')
103-0403-00 - 9-pin adapter (8p8c RJ45 to DB-9 adapter)
016-1399-00 - Soft case
070-9247-XX - User manual (THS710STD, THS720STD)
070-9731-XX - User manual (THS730A, THS720P, THS720A, THS710A)
070-9257-XX - Reference manual (THS710STD, THS720STD)
070-9741-XX - Reference manual (THS730A, THS720P, THS720A, THS710A)

Optional Accessories

P5102 - 10X, 100MHz, CAT II, 1000 V_RMS Passive probes (THS730A, THS720A, THS710A, THS710STD, THS720STD)
012-1483-00 - Deluxe meter lead set (THS710STD, THS720STD)
ATLDX1 - Deluxe meter lead set (THS730A, THS720P, THS720A, THS710A)
THS7CHG - Battery charger
THS7BAT - Extra 4.8 V, 2.8 Ahr Ni-Cd Battery pack
103-0090-00 - BNC to banana jack adapter to convert external trigger input to BNC (THS730A, THS720P, THS720A, THS710A)
174-1734-00 - Cigarette lighter adapter
HC 411 - Thermal printer (006-7580-00 - Pack 5 paper rolls)
THS7HCA - Hard carrying case
A621 - BNC Current Probe, AC only, 2000 A max, 5Hz to 50 kHz
A622 - BNC Current Probe, AC or DC, 100 A max, DC to 100 kHz
A605 - DMM busbar-style current probe, AC only, 500A max, 48 Hz to 1 kHz, 1 mV/A
A610 - DMM busbar-style current probe, AC or DC, 500A max, DC to 440 Hz, 1 mV/A
P6129B - 1X-10X, 10 MHz/100 MHz Switchable passive probes
P6561AS - 10X, 100 MHz SMD probes
P6408 Word Recogniser Trigger Probes - 16-bit word recogniser probe (trigger event recognition only)
S60DWAV - DocuWave DOS software (THS710STD, THS720STD)
WSTR31 - WaveStar software (THS730A, THS720P, THS720A, THS710A)
070-9245-XX - Programmer manual (THS710STD, THS720STD)
070-9751-XX Programmer manual (THS730A, THS720P, THS720A, THS710A)
070-9246-XX - Service manual (THS710STD, THS720STD)
070-9752-XX - Service manual (THS730A, THS720P, THS720A, THS710A)