With its many features and its easy-to-use menu driven interface, the SR simplifies time-resolved photon counting experiments. The SR is the first multichannel scaler which combines amplifiers, discriminators, re binclocks clocks, and data analysis in a single, integrated instrument. A trigger starts the counter which segments photon count data into sequential time bins up to 32k bins. The width of the bins can be set from re binclocks ns to 10 ms. The instrument records the number of photons that arrive in each bin.
The SR is useful in a variety of applications where it is necessary to count re binclocks as a function of time: LIDAR, time of flight mass spectroscopy, and fluorescence decay measurements are just a few examples. The maximum input sensitivity is 10 mV, and if your input signal level is less than this a preamplifier like the SR should be used. A trigger pulse starts the data acquisition cycle. Re binclocks SR offers a choice of bin widths ranging from 5 ns to Re binclocks, an external bin clock can be provided to the SR, allowing you re binclocks define your own bin size.
The number of bins in each record is adjustable from 1k to 32k in 1k increments. Once the selected number of bins has been recorded, the SR either adds or subtracts re binclocks result of the current record from the accumulated bin totals. The SR can be programmed to accumulate between one re binclocks 64k re binclocks, or set to free run. Each record can be added or subtracted from the current accumulator totals. The instrument can be set to toggle between add and subtract every N records, or an external toggle input can select the polarity of the next record.
A rear-panel inhibit input allows you to selectively re binclocks the accumulation of any given record.
The screen display is updated continuously as records are accumulated, providing a live, real-time display of the data. The 7" CRT screen allows complete flexibility in displaying your results. Between re binclocks and 16k bins can be displayed on the screen at any time, and complete horizontal and vertical zooming and scrolling features are provided. An "Autoscale" key quickly optimizes the screen for the current data with re binclocks single keypress. A fast, responsive, on-screen cursor lets you re binclocks the maximum, minimum or mean data value from a selected range of the graph.
The SR is based on a simple, menu-based user interface. Each menu groups related instrument functions and defines softkeys to control those functions. The instrument settings are changed by re binclocks the softkeys or by turning the front-panel knob. Complete context re binclocks help is provided for all menus and softkeys. The remote command list is also provided on a help screen as an aid re binclocks programming the SR The SR's extensive capabilities don't stop with data acquisition.
Savitsky-Golay smoothing can be applied to any portion of the data, with selectable smoothing intervals. Gaussians, exponentials or straight lines can be fit to arbitrary regions of the display, allowing you to re binclocks determine decay lifetimes. Basic statistical parameters can be calculated for data regions including total number of counts, mean number of counts, and variance.
Basic arithmetic operations, including addition, subtraction, multiplication, division, logs re binclocks square roots, can be applied to the current data. The SR has a built-in 3. Both data files and settings files can be stored so you can save complete instrument setups for a variety of situations and recall them instantly. Hardcopy output is re binclocks from re binclocks SR in a variety of forms. A standard Centronics printer port lets you dump the screen to dot-matrix or LaserJet compatible printers at any time.
All instrument settings and functions can be read and set via the interfaces. Numerous modes are available for downloading the count data to your computer including ASCII transfer, binary transfer, and a fast binary dump mode which transfers data continuously over the GPIB interface as it is being acquired by the instrument.
Features Specifications EU Customers: There is a 20 ns insertion delay from the signal input to the discriminator output. Signal pulses arriving 25 ns after the trigger will be counted in the first bin. The beginning of the first bin occurs at the same time. External re binclocks input may also control the toggle. Low whenever signal input exceeds discriminator level with the correct slope. Rising edge is synchronous with first re binclocks bin of each record. Remains high until re binclocks for next trigger.
Each transition is a bin boundary. Active only while a record is being acquired. Indicates whether the next record will be added to or re binclocks from the accumulation. Rising edge triggers next time bin. If high, causes the current record to be subtracted from the accumulation in external toggle mode.
All instrument functions can be controlled and read through the interfaces. Data transfer 16k bins in ms Re binclocks Screen dumps to Epson compatible dot matrix or LaserJet printers. Storage of data and setups. Warranty One year parts and labor on defects in materials and workmanship. Downloads Datasheet User's Manual. Externally Clocked Time Bins. TTL input, sampled each trigger. If high, causes the current record to be ignored not accumulated.
Screen dumps to Epson compatible dot matrix or LaserJet printers.
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