Samvinna
LIST
FEGURÐ OG VELLÍÐAN
HANDVERK
MENNING OG SAGA
SKEMMTUN
UMHVERFI
MATUR OG DRYKKUR
ÖFUGVERKFRÆÐI
VÍSINDI
ÍÞRÓTTIR
TÆKNI
KLÆÐANLEG TÆKNI
Oscilloscope: Two-Channel Digital, with a Delay per Channel and a Common Delay (Anritsu, US 4,727,288, 1988)
A two-channel digital oscilloscope. Each channel has its own converter and delay circuit. One knob, with a main and a sub button, sets the delays. The sub button shifts only the sub channel's wave, so you can line it up against the main one. The main button shifts both waves together and keeps the gap between them.
Result: a 2-channel digital oscilloscope that can move both traces along the time base without losing their phase difference.
Source: K. Nakatsugawa et al. (Anritsu), US 4,727,288 (1988). Unknown: sample rate, bandwidth, memory size and the display. Picture: the patent drawing.
Sérfræðingur
Unknown
Leiðbeiningar
1
1
Convert the two channels
Convert the two channels
Bring the main channel and the sub channel each to its own analog-to-digital converter. Ours: BNC sockets. Not given: the sample rate, the bandwidth.
Efni fyrir þetta skref:
Hliðrænn-stafrænn breytir2 main and sub converters
Samásatengisett (BNC / SO-239)1 input socketsNauðsynleg verkfæri:
Lóðbolti
Vírstrípari2
2
Delay, store and display
Delay, store and display
Pass each channel's digital signal through its own delay circuit, whose delay is set by its own delay value setting device. Store both delayed signals in a wave memory and show them on the display. Ours: logic ICs for the delay circuits and setting devices, IC memory, and a CRT driven through D/A converters. Not given: how the delay circuits are built, the memory size, the display.
Efni fyrir þetta skref:
Úrval rökrása1 delay circuits and setting devices
Samrásaminni1 wave memory
Stafræn-hliðrænn breytir2 display drive
Bakskautsgeislalampi1 displayNauðsynleg verkfæri:
LóðboltiVírstrípari3
3
Build the delay panel and processor
Build the delay panel and processor
Make a delay operation panel with a main switch, a sub switch and one dial, with an encoder on the dial so each turn is read as a change in its output. Connect the panel to a microprocessor with a common memory that holds the sub channel's delay S in one area and the main channel's delay M in another. Mount it all in a case with its supply. Ours: push buttons, an aluminium case, a DC supply.
Efni fyrir þetta skref:
Þrýstihnappur2 main and sub switches
Snúningsnemi1 delay dial
Örgjörvi1 command devicesSamrásaminni1 common memory
Álkassi1 caseNauðsynleg verkfæri:
Jafnstraumsgjafi
SúluborLóðbolti4
4
Program the two commands
Program the two commands
When the dial turns, read the encoder change e and which switch is held. Sub switch: add e to S, set the sum in the sub channel's setting device and store it back as the new S. Main switch: add e to both M and S, set M + e in the main channel's device and S + e in the sub channel's, and store both back. The main command so moves both channels by the same amount and keeps their relative delay.
Nauðsynleg verkfæri:
Lóðbolti5
5
Compare two waves
Compare two waves
Feed two signals in. Hold the sub switch and turn the dial to slide the sub channel's wave against the main one. Then hold the main switch and turn the dial: both waves move along the time base together, with the phase difference between them unchanged. Test it with a known signal.
Nauðsynleg verkfæri:
MerkjagjafiEfni
10- 2 main and sub convertersStaðgengill
- 1 input socketsStaðgengill
- 1 delay circuits and setting devicesStaðgengill
- 1 common memoryStaðgengill
- 2 display driveStaðgengill
- 1 displayStaðgengill
- frá$0.51
- frá$3.53
- 1 command devicesStaðgengill
- 1 caseStaðgengill
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