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The discontinued TiePieSCOPE HS805 reaches 1 GSa/s on one channel, but its maximum falls to 500 MSa/s when both channels are active. It combines that sampling rate with 250 MHz analog bandwidth, 8-bit resolution, and 32 MiSamples of memory per channel.
What does 1 GSa/s mean on the TiePie HS805?
Sample frequency is the rate at which an oscilloscope takes samples: the number of samples per second, as defined in TiePie’s API documentation. On the HS805, 1 GSa/s is the maximum acquisition rate with one channel in use. With both channels active, the specified maximum is 500 MSa/s per active channel. The headline rate therefore does not apply to simultaneous two-channel measurements.
TiePie HS805 specifications
| Specification | TiePieSCOPE HS805 |
|---|---|
| Analog channels | 2 BNC inputs |
| Maximum sample rate | 1 GSa/s on one channel; 500 MSa/s with both channels active |
| Analog bandwidth | 250 MHz (-3 dB) |
| Vertical resolution | 8 bits; amplitude accuracy specified as 1% |
| Record memory | 32 MiSamples per channel, with configurable pre-trigger and post-trigger positions across the record |
| Input ranges | 0.2 V to 80 V full scale, in a 2-4-8 sequence |
| Input impedance | 1 MΩ // 20 pF |
| Maximum input voltage | 200 V DC plus AC peak below 10 kHz |
| Trigger sources | CH1, CH2, logical AND/OR, analog external, and digital external |
| PC connection | USB 2.0 High Speed (480 Mbit/s); USB 1.1 compatibility listed |
| Probes listed in package | Two switchable HP-9250 probes, 1:1/1:10 |
These specifications are from TiePie’s discontinued HS805 product page. Its listed final Multi Channel software and driver support covers Windows 98, 2000, ME, XP, Vista, 7, 8, and 10; the page does not establish compatibility with later Windows releases.
What the sample rate does—and does not—tell you
A 1 GSa/s rate describes how often the instrument samples; it is distinct from analog bandwidth, which is specified at 250 MHz for the HS805. The maximum rate is also conditional on channel use, so measurements requiring two simultaneous inputs use the lower 500 MSa/s specification. The instrument’s 8-bit vertical resolution and 32 MiSamples per channel are separate considerations: sampling speed alone does not describe amplitude detail or how much waveform can be recorded.
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HS805 compared with TiePie’s Handyscope HS6
The Handyscope HS6 is TiePie’s relevant newer comparison. Although both instruments list a 1 GSa/s maximum, the HS6 adds higher vertical-resolution modes and a larger memory option. The specifications below are stated on TiePie’s HS6 product page.
| Specification | HS805 (discontinued) | Handyscope HS6 |
|---|---|---|
| Maximum sample rate | 1 GS/s one channel; 500 MSa/s two channels | Up to 1 GSa/s; per-channel rate by active channel count not stated on the cited product page |
| Analog bandwidth | 250 MHz | Up to 250 MHz |
| Vertical resolution | 8 bits | 12-, 14-, and 16-bit modes |
| Memory | 32 MiSamples per channel | Up to 256 Mpoints per channel with extended memory |
| Channel count | 2 analog channels | 4 channels, as stated in TiePie’s HS6 description |
The HS6’s quoted 1 GSa/s, up-to-250 MHz bandwidth, resolution modes, and extended-memory figure describe the HS6, not the HS805. For an older HS805, the listed package includes two HP-9250 probes switchable between 1:1 and 1:10; confirm the probe is present and suitable when evaluating a used unit.
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