Digidata 1550B Low-Noise Data Acquisition System User Start Guide
38 5040237 B
Pin Number Digital Output
23 Internal Use (or 13)
24 Scope Output (or 15)
1
25 Analog ground
Table 6-6: Pin Assignments Specifications (continued)
1. Pin 24 is configured as the front panel SCOPE output, using the hardware’s 16th digital bit (15).
Telegraph Inputs
Item Description
Number of channels 4
Sample rates per channel 40 kHz
Input range ±10.0 V
Table 6-7: Telegraph Inputs Specifications
HumSilencer Adaptive Noise Cancellation Module
Item Description
Maximum Input Signal (total of noise +
signal)
±10 V
Maximum Noise Amplitude 20 V peak‐to‐peak (on a 0 V signal)
Noise Cancellation Line‐frequency (50 Hz / 60 Hz) and harmonics up to 10
kHz
Cancellation Response Time < 1 second
Table 6-8: HumSilencer Adaptive Noise Cancellation Specifications
AC Power
The AC Power is supplied from a single AC input connector on the rear panel for the supplied
AC power line cord.
Item Description
Voltage input rating 100 V–240 V AC, 50/60 Hz 50 W Max.
Replaceable fuse type Cartridge, fast acting
Fuse dimensions 6.3 mm x 35 mm
Fuse rating 1.0 Ampere, 250 V
Table 6-9: AC Power Specifications
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