Teledyne 4.3.9Digital Filter Setup, Operation, Model 7300A, Teledyne Analytical Instruments

4 Operation Model 7300A

Hard_offset_C=3015	(This is the raw DAC count of the Coarse zero
	adjustment. It should read between 0 and 4095)
Hard_offset_F=2715	(This is the raw DAC count of the Fine zero
	adjustment. It should read between 0 and 4095)
Current_gain = 4	(This is the gain the analyzer is on, it should read
	between 0 and 9)

4.3.9Digital Filter Setup

The 7300A analyzer has the option of decreasing or increasing the amount of filtering on the signal. This feature enhances the basic filtering done by the analog circuits by setting the amount of digital filtering effected by the micro- processor. To access the digital filter setup, scroll through the menu and select FILTER. Press the Enter key to see the following screen:

Enter Digital

Filter: 4

The number on the second row can be adjusted from 0, minimum digital filtering, to 10, maximum digital filtering. The default setting is 4 and that should suffice for most applications. In some applications where speeding the response time with some trade off in noise is of value, the operator could decrease the number of the digital filter. In applications where the signal is noisy, the operator could switch to a higher number; the response time is slowed down though.

10 to 90% response time on the different settings to a step input is shown below. This response time does not include the contributions of the bench sampling system and the preamplifier near the detector.

Setting	10-90% Response
	(seconds)
0	2.5
1	5
2	10
3	20
4	40
5	80
4-12	Teledyne Analytical Instruments